JP2014190859A - Sludge shut-off device and sludge shut-off method - Google Patents

Sludge shut-off device and sludge shut-off method Download PDF

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JP2014190859A
JP2014190859A JP2013067092A JP2013067092A JP2014190859A JP 2014190859 A JP2014190859 A JP 2014190859A JP 2013067092 A JP2013067092 A JP 2013067092A JP 2013067092 A JP2013067092 A JP 2013067092A JP 2014190859 A JP2014190859 A JP 2014190859A
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sludge
blocking device
partition
support member
container
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Satoshi Gunji
智 郡司
Hironori Kumanomido
宏徳 熊埜御堂
Taemi Sato
妙美 佐藤
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Toshiba Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract

【課題】簡素化された構造で核燃料物質を含むスラッジの臨界および広範囲への散逸を防止するスラッジ遮断装置およびスラッジ遮断方法を提供する。
【解決手段】スラッジ遮断装置１０Ａは、核燃料物質を含むスラッジ１１が液体中に沈積している容器１２に沈められて容器１２の底部に設置される支持部材と、支持部材に支持されるとともに液相と固相の界面１４の近傍に配置される仕切手段１５ａと、界面１４を覆うように仕切手段１５ａを動作させる動作手段１６ａと、を備える。
【選択図】 図２The present invention provides a sludge blocking device and a sludge blocking method for preventing sludge containing nuclear fuel material from being dissipated to a critical and wide range with a simplified structure.
A sludge blocking device 10A includes a support member that is submerged in a container 12 in which sludge 11 containing nuclear fuel material is deposited in a liquid and is installed at the bottom of the container 12, and is supported by the support member and liquid A partition unit 15a disposed in the vicinity of the interface 14 between the phase and the solid phase; and an operation unit 16a that operates the partition unit 15a so as to cover the interface 14.
[Selection] Figure 2

Description

本発明は、沈積した核燃料物質を含むスラッジを遮断するスラッジ遮断装置およびスラッジ遮断方法に関する。   The present invention relates to a sludge blocking device and a sludge blocking method for blocking sludge containing deposited nuclear fuel material.

原子力発電施設の事故処理をする場合、スラッジとしてタービン建屋の内部などに沈積する核燃料物質を含む物質を外部に排出する場合がある。核燃料物質を含む物質を取り扱う際は、常に、臨界に至る条件を成立させないよう機器設計および取扱いをすることで未臨界を担保する必要がある（例えば、特許文献１または特許文献２）。   When handling accidents at nuclear power generation facilities, there are cases where materials including nuclear fuel materials that deposit in the turbine building as sludge are discharged to the outside. When handling a material containing nuclear fuel material, it is always necessary to ensure subcriticality by designing and handling the equipment so as not to satisfy the critical condition (for example, Patent Document 1 or Patent Document 2).

核燃料物質を含む未臨界の体系がどの程度臨界に近いかを示す指標として、（１）式で表わされる中性子実効増倍率ｋeffが挙げられる。
ｋeff＝ｋ∞／（１＋Ｍ２Ｂ２） （１）
ここでｋ∞は中性子無限増倍率、Ｂ２は沈積するスラッジの厚さなどの形状・寸法で決まるバックリング、Ｍ２は液体中の核燃料物質の濃度などで決まる中性子移動面積である。 An index indicating how close a subcritical system containing nuclear fuel material is critical is the neutron effective multiplication factor k eff represented by equation (1).
k eff = k ∞ / (1 + M 2 B 2 ) (1)
Here k ∞ neutron infinite multiplication factor, B 2 is buckling determined by the shape and dimensions such as the thickness of the sludge deposit, M 2 is a neutron moving area determined in such a concentration of the nuclear fuel material in a liquid.

（１）式で与えられる中性子実効増倍率ｋeffが臨界の１を十分下回るよう、中性子移動面積Ｍ２およびバックリングＢ２を管理することで臨界管理を行う。（例えば、特許文献１）。
（１）式でｋeff＜１とし、類似の系に対する推定臨界下限増倍率をｋＬ（＜１）として（２）式を得る。
Ｂ２＞（ｋ∞／ｋＬ−１）／Ｍ２ （２） Criticality management is performed by managing the neutron transfer area M 2 and the buckling B 2 so that the effective neutron multiplication factor k eff given by the equation (1) is well below the critical 1. (For example, patent document 1).
In equation (1), k eff <1 and the estimated critical lower limit multiplication factor for a similar system is k L (<1) to obtain equation (2).
B 2 > (k ∞ / k L −1) / M 2 (2)

ある定まった中性子移動面積Ｍ２に対しては、（２）式が担保されるようなバックリングＢ２を与えることで、体系形状による臨界管理を行う。
つまり、核燃料物質を含むスラッジは、一般廃水に沈積する汚泥とは異なり（例えば、特許文献３または特許文献４）、（２）式を満たすよう厳密な臨界管理がされて排出または貯蔵などがされなければならない。 For a certain neutron movement area M 2 , critical control based on the system shape is performed by providing a buckling B 2 that secures the formula (2).
In other words, sludge containing nuclear fuel material differs from sludge deposited in general wastewater (for example, Patent Document 3 or Patent Document 4), and is subjected to strict critical management to satisfy the equation (2) and is discharged or stored. There must be.

特開２００８−２８６５２９号公報JP 2008-286529 A 特開２００５−１０６６１１号公報JP 2005-106611 A 特開２００１−１３７８３５号公報JP 2001-137835 A 公開昭６１−７１８９４号公報Publication No. 61-71894

上述のように、核燃料物質を含むスラッジは、例えば、排出の際に臨界に達してしまわないよう、その厚さを一定以下に保って排出される必要がある。   As described above, the sludge containing nuclear fuel material needs to be discharged with its thickness kept below a certain level, for example, so as not to reach criticality during discharge.

また、スラッジが臨界に達しなくても、液体を回収する際、スラッジが散逸して液体とともに回収されると、回収した液体についても引き続き臨界管理をする負担が生じる。回収の後の臨界管理の負担を低減するには、回収管に設置されてスラッジを多量に含む液体からスラッジを分離する手段を複数付加しなければならないという課題があった。   Even if the sludge does not reach the criticality, when recovering the liquid, if the sludge is dissipated and recovered together with the liquid, a burden of continuing to manage the criticality of the recovered liquid arises. In order to reduce the burden of criticality management after recovery, there has been a problem that a plurality of means for separating sludge from a liquid containing a large amount of sludge installed in a recovery pipe must be added.

本発明はこのような事情を考慮してなされたもので、簡素化された構造で核燃料物質を含むスラッジの臨界および広範囲への散逸を防止するスラッジ遮断装置およびスラッジ遮断方法を提供することを目的とする。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a sludge blocking device and a sludge blocking method that prevent the sludge containing nuclear fuel material from critically and widely radiating with a simplified structure. And

本発明にかかるスラッジ遮断装置は、核燃料物質を含むスラッジが液体中に沈積している容器に沈められて前記容器の底部に設置される支持部材と、前記支持部材に支持されるとともに液相と固相の界面の近傍に配置される仕切手段と、前記界面を覆うように前記仕切手段を動作させる動作手段と、を備えるものである。   A sludge blocking device according to the present invention includes a support member that is submerged in a container in which sludge containing nuclear fuel material is deposited in a liquid and is installed at the bottom of the container, and is supported by the support member and has a liquid phase. Partition means disposed in the vicinity of the interface of the solid phase, and operating means for operating the partition means so as to cover the interface.

本発明により、簡素化された構造で核燃料物質を含むスラッジの臨界および広範囲への散逸を防止するスラッジ遮断装置およびスラッジ遮断方法が提供される。   According to the present invention, there is provided a sludge blocking device and a sludge blocking method for preventing sludge containing nuclear fuel material from criticality and wide-area dissipation with a simplified structure.

第１実施形態にかかるスラッジ遮断装置を容器に設置する様子を示す概略図。Schematic which shows a mode that the sludge interruption | blocking apparatus concerning 1st Embodiment is installed in a container. （Ａ）は第１実施形態にかかるスラッジ遮断装置を設置した容器の断面図、（Ｂ）は図２（Ａ）のスラッジ遮断装置でスラッジを遮断した状態を示す図。(A) is sectional drawing of the container which installed the sludge interruption | blocking apparatus concerning 1st Embodiment, (B) is a figure which shows the state which interrupted | blocked sludge with the sludge interruption | blocking apparatus of FIG. 2 (A). 水対ウランの体積比に対する中性子実効増倍率の変化を示す概略図。Schematic which shows the change of the neutron effective multiplication factor with respect to the volume ratio of water to uranium. （Ａ）は第１実施形態のスラッジ遮断装置の変形例を示す図，（Ｂ）は第１実施形態のスラッジ遮断装置の変形例を示す図。(A) is a figure which shows the modification of the sludge interruption | blocking apparatus of 1st Embodiment, (B) is a figure which shows the modification of the sludge interruption | blocking apparatus of 1st Embodiment. 第１実施形態のスラッジ遮断装置の変形例を示す図。The figure which shows the modification of the sludge interruption | blocking apparatus of 1st Embodiment. （Ａ）は第２実施形態にかかるスラッジ遮断装置を設置した容器の断面図、（Ｂ）は第２実施形態のスラッジ遮断装置でスラッジを遮断した状態を示す図。(A) is sectional drawing of the container which installed the sludge interruption | blocking apparatus concerning 2nd Embodiment, (B) is a figure which shows the state which interrupted | blocked sludge with the sludge interruption | blocking apparatus of 2nd Embodiment. （Ａ）は第２実施形態のスラッジ遮断装置の変形例を示す図、（Ｂ）は図７（Ａ）のスラッジ遮断装置でスラッジを遮断した状態を示す図。(A) is a figure which shows the modification of the sludge interruption | blocking apparatus of 2nd Embodiment, (B) is a figure which shows the state which interrupted | blocked sludge with the sludge interruption | blocking apparatus of FIG. 7 (A). （Ａ）は第３実施形態にかかるスラッジ遮断装置の斜視図、（Ｂ）は第３実施形態のスラッジ遮断装置の変形例を示す図。(A) is a perspective view of the sludge interruption | blocking apparatus concerning 3rd Embodiment, (B) is a figure which shows the modification of the sludge interruption | blocking apparatus of 3rd Embodiment. （Ａ）は第４実施形態にかかるスラッジ遮断装置を設置した容器の断面図、（Ｂ）は第４実施形態のスラッジ遮断装置の変形例を示す図。(A) is sectional drawing of the container which installed the sludge interruption | blocking apparatus concerning 4th Embodiment, (B) is a figure which shows the modification of the sludge interruption | blocking apparatus of 4th Embodiment. 第５実施形態にかかるスラッジ遮断装置の斜視図。The perspective view of the sludge interception device concerning a 5th embodiment. （Ａ）は第６実施形態にかかるスラッジ遮断装置を設置した容器の断面図、（Ｂ）は第６実施形態のスラッジ遮断装置でスラッジを遮断した状態を示す図。(A) is sectional drawing of the container which installed the sludge interruption | blocking apparatus concerning 6th Embodiment, (B) is the figure which shows the state which interrupted | blocked sludge with the sludge interruption | blocking apparatus of 6th Embodiment. 各実施形態にかかるスラッジ遮断装置を容器に複数敷き詰めた上面図。The top view which spread a plurality of sludge interception devices concerning each embodiment on a container. 各実施形態にかかるスラッジ遮断装置の動作手順を示すフローチャート。The flowchart which shows the operation | movement procedure of the sludge interruption | blocking apparatus concerning each embodiment.

以下、本発明の実施形態を添付図面に基づいて説明する。
図１は、第１実施形態にかかるスラッジ遮断装置１０Ａ（１０）を容器１２に設置する様子を示す概略図である。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic view showing a state in which the sludge blocking device 10A (10) according to the first embodiment is installed in the container 12. FIG.

各実施形態にかかるスラッジ遮断装置１０Ａは、核燃料が破損して液体とともに流動し沈積しうるスラッジ１１（図２）となって沈積している原子力発電施設内の各所に適用される。
すなわち、容器１２は、例えば、復水器などのタービン建屋の各種設備、原子炉建屋の各種設備または建屋そのものなどであり、その形状は多様である。 The sludge cutoff device 10A according to each embodiment is applied to various places in a nuclear power generation facility where nuclear fuel is damaged and deposited as sludge 11 (FIG. 2) that can flow and deposit together with liquid.
That is, the container 12 is, for example, various facilities of a turbine building such as a condenser, various facilities of a reactor building, or the building itself, and the shapes thereof are various.

（第１実施形態）
図２は、図２（Ａ）は第１実施形態にかかるスラッジ遮断装置１０Ａを設置した容器１２の断面図であり、図２（Ｂ）は図２（Ａ）のスラッジ遮断装置１０Ａでスラッジ１１を遮断した状態を示す図である。 (First embodiment)
2A is a cross-sectional view of the container 12 in which the sludge blocking device 10A according to the first embodiment is installed, and FIG. 2B is a sludge 11 in the sludge blocking device 10A of FIG. It is a figure which shows the state which interrupted | blocked.

第１実施形態にかかるスラッジ遮断装置１０Ａは、図１または図２に示すように、核燃料物質を含むスラッジ１１が液体中に容器１２に沈められて容器１２の底部に設置される支持部材１３ａ（１３）と、支持部材１３ａに支持されるとともに液相と固相の界面１４の近傍に配置される仕切手段１５ａ（１５）と、界面１４を覆うように仕切手段１５ａを動作させる動作手段１６ａ（１６）と、を備える。   As shown in FIG. 1 or FIG. 2, the sludge blocking device 10 </ b> A according to the first embodiment includes a support member 13 a (sludge 11 containing nuclear fuel material is submerged in a container 12 and placed at the bottom of the container 12. 13), partitioning means 15a (15) supported by the support member 13a and disposed in the vicinity of the interface 14 between the liquid phase and the solid phase, and operating means 16a (operating the partitioning means 15a so as to cover the interface 14) 16).

さらに、第１実施形態にかかるスラッジ遮断装置１０Ａは、開口部２４からスラッジ１１を容器１２の外部に排出する排出管２０と、スラッジ１１を希釈する希釈液または中性子吸収体溶液をスラッジ１１に添加する添加管２２と、仕切手段１５ａでスラッジ１１を覆った後に仕切手段１５ａの上部の液体を回収する回収管２３と、を備える。
なお、図２（Ａ），（Ｂ）において、支持部材１３ａは省略してある。 Furthermore, the sludge blocking apparatus 10A according to the first embodiment adds a discharge pipe 20 that discharges the sludge 11 from the opening 24 to the outside of the container 12, and a diluent or neutron absorber solution that dilutes the sludge 11 to the sludge 11. And an additional pipe 22 for collecting the liquid on the upper part of the partitioning means 15a after the sludge 11 is covered with the partitioning means 15a.
In FIGS. 2A and 2B, the support member 13a is omitted.

支持部材１３ａは、核燃料物質を含むスラッジ１１が液体中に沈積している容器１２に沈められ（図１のＡ方向）、スラッジ１１の近傍に設置される。   The support member 13a is placed in the vicinity of the sludge 11 by being submerged in the container 12 in which the sludge 11 containing the nuclear fuel material is deposited in the liquid (direction A in FIG. 1).

ここで、図３は、水対ウランの体積比に対する中性子実効増倍率ｋeffの変化を示す概略図である。
図３に示されるように、中性子実効増倍率ｋeffは水対ウランの体積比に対して上に凸の相関を持つ。 Here, FIG. 3 is a schematic diagram showing a change in the effective neutron multiplication factor k eff with respect to the volume ratio of water to uranium.
As shown in FIG. 3, the neutron effective multiplication factor k eff has an upwardly convex correlation with the volume ratio of water to uranium.

つまり、スラッジ１１の全体量が変化しなくても、スラッジ１１の厚さが増加すると臨界に近づくということである。一方、例えば、スラッジ１１は、燃料濃縮度が５ｗｔ％以下の場合、広範囲に１０ｃｍ程度以下の厚さで沈積しているときは、沈積する範囲が広範であっても臨界に達しない。すなわち、核燃料物質を含むスラッジ１１は、一般廃水に沈積する汚泥とは異なり、臨界に達しないようその厚さが臨界管理される必要がある。   In other words, even if the total amount of the sludge 11 does not change, it approaches the criticality as the thickness of the sludge 11 increases. On the other hand, for example, when the fuel enrichment is 5 wt% or less, the sludge 11 does not reach criticality even if the deposition range is wide when it is deposited at a thickness of about 10 cm or less over a wide range. That is, the sludge 11 containing nuclear fuel material needs to be critically controlled so that it does not reach criticality, unlike sludge deposited in general wastewater.

そこで、支持部材１３ａは、スラッジ１１が沈積する底面からの仕切手段１５ａの距離を調整する脚部１８を備える。そして、界面１４から仕切手段１５ａまでの距離ｄが、スラッジ１１の濃度および厚さに応じて前記（２）式に基づく検討で定まる範囲で調節される。脚部１８の長さは自由に決められ、仕切手段１５ａに界面１４が達してもスラッジ１１の厚さが十分に臨界を下回るように調整される。   Therefore, the support member 13a includes a leg portion 18 that adjusts the distance of the partitioning means 15a from the bottom surface on which the sludge 11 is deposited. Then, the distance d from the interface 14 to the partitioning means 15a is adjusted in a range determined by the examination based on the formula (2) according to the concentration and thickness of the sludge 11. The length of the leg portion 18 is freely determined, and is adjusted so that the thickness of the sludge 11 is sufficiently less than critical even when the interface 14 reaches the partitioning means 15a.

仕切手段１５ａは、支持部材１３ａに支持されるとともに液相と固相の界面１４の近傍に配置される。第１実施形態においては、仕切手段１５ａは、図１および図２（Ａ），（Ｂ）に示されるように分割された仕切板である。   The partition unit 15a is supported by the support member 13a and is disposed in the vicinity of the interface 14 between the liquid phase and the solid phase. In the first embodiment, the partitioning means 15a is a partition plate divided as shown in FIGS. 1 and 2A and 2B.

仕切手段１５ａは、例えば、ヒンジなどの動作手段１６ａによって一辺を回転可能に２枚ずつ固定され、他辺をピンチなどの留具１９で挟まれて畳まれた状態で設置される。
なお、仕切手段１５ａまたは支持部材１３ａの少なくとも一部は、中性子吸収体を含む材質からなると、有効にスラッジ１１の臨界を防止できる。 For example, the partitioning means 15a is installed in a state in which two sides are rotatably fixed by an operating means 16a such as a hinge, and the other side is sandwiched and clamped by a fastener 19 such as a pinch.
If at least a part of the partitioning means 15a or the support member 13a is made of a material containing a neutron absorber, the criticality of the sludge 11 can be effectively prevented.

例えば、仕切手段１５ａを中性子吸収体であるホウ素系の化合物を含むステンレスとする方法や、仕切手段１５ａの表面にホウ素系の化合物を含む塗料またはシールで被覆する方法がある。なお、中性子吸収体の角材をスラッジ１１の近傍に沈設してもよい。   For example, there are a method in which the partitioning means 15a is made of stainless steel containing a boron-based compound that is a neutron absorber, and a method in which the surface of the partitioning means 15a is covered with a paint or seal containing a boron-based compound. Note that a neutron absorber square may be deposited in the vicinity of the sludge 11.

動作手段１６ａは、例えばヒンジであり、仕切手段１５ａを支持部材１３ａに連結し、界面１４を覆うように仕切手段１５ａを動作させる。支持部材１３ａを設置した後、留具１９をはずすと、仕切手段１５ａの重さで動作手段１６ａが回転して開き、図２（Ｂ）に示されるように界面１４を覆う。   The operating means 16a is, for example, a hinge, which connects the partitioning means 15a to the support member 13a and operates the partitioning means 15a so as to cover the interface. When the fastener 19 is removed after the support member 13a is installed, the operating means 16a rotates and opens by the weight of the partitioning means 15a, and covers the interface 14 as shown in FIG.

図４（Ａ），（Ｂ）はいずれも、第１実施形態のスラッジ遮断装置１０Ａの変形例を示す図である。なお、図４以降の各図では、添加管２２、添加槽２６および支持部材１３ａが適宜省略されている。   4 (A) and 4 (B) are views showing a modification of the sludge blocking device 10A of the first embodiment. In addition, in each figure after FIG. 4, the addition pipe | tube 22, the addition tank 26, and the supporting member 13a are abbreviate | omitted suitably.

動作手段１６ａによる仕切手段１５ａの固定の仕方は、必ずしも２枚を一組とする必要はなく、図４（Ａ）に示すように、幅の広い仕切手段１５ａを１枚固定することもできる。また、図４（Ｂ）に示すように、仕切手段１５ａの中央を固定してもよい。いずれの場合も、動作手段１６ａによる回転の後には、仕切手段１５ａは図２（Ｂ）のように界面１４を覆う配置となり、スラッジ１１の散逸を防止する。   The way of fixing the partitioning means 15a by the operating means 16a does not necessarily need to be a set of two sheets, and one wide partitioning means 15a can be fixed as shown in FIG. Further, as shown in FIG. 4B, the center of the partitioning means 15a may be fixed. In any case, after the rotation by the operating means 16a, the partitioning means 15a is disposed so as to cover the interface 14 as shown in FIG. 2 (B), thereby preventing the sludge 11 from escaping.

また、図５も、第１実施形態のスラッジ遮断装置１０Ａの変形例を示す図である。図５に示されるように、仕切手段１５ａを支持部材１３ａに連結する動作手段１６ａｓ（１６ａ）のほかに、仕切手段１５ａを他の仕切手段１５ａに連結する動作手段１６ａｔ（１６ａ）で仕切手段１５ａに動作を付与してもよい。 FIG. 5 is also a diagram showing a modification of the sludge blocking device 10A of the first embodiment. As shown in FIG. 5, in addition to the operation means 16a s (16a) for connecting the partition means 15a to the support member 13a, the partition means 15a is partitioned by the operation means 16a t (16a) for connecting the partition means 15a to the other partition means 15a. An action may be given to the means 15a.

動作手段１６ａｔをさらに複数備え、連結される仕切手段１５ａの数を増加させることもできる。図５においても、設置の後に仕切手段１５ａを留める留具１９（図１）が外され、仕切手段１５ａの自重により動作手段１６ａが回転し、仕切手段１５ａが界面１４を覆う。 Further comprising a plurality of operation means 16a t, it is also possible to increase the number of partition means 15a to be connected. Also in FIG. 5, the fastener 19 (FIG. 1) which fastens the partition means 15a after installation is removed, the operating means 16a rotates due to its own weight, and the partition means 15a covers the interface.

排出管２０は、開口部２４からスラッジ１１を容器１２の外部に排出する。排出管２０は、液体の上部から容器１２の底面に向けて沈められてもよいし、スラッジ１１付近の容器１２の側面に穴をあけて挿入されてもよい。
なお、排出管２０をスラッジ遮断装置１０Ａの一部として予め備えさせると、仕切手段１５ａおよび排出管２０の形状を互いに調整でき、スラッジ１１を遮断する効率が上げられる。 The discharge pipe 20 discharges the sludge 11 from the opening 24 to the outside of the container 12. The discharge pipe 20 may be submerged from the upper part of the liquid toward the bottom surface of the container 12 or may be inserted with a hole formed in the side surface of the container 12 near the sludge 11.
If the discharge pipe 20 is provided in advance as a part of the sludge blocking device 10A, the shapes of the partitioning means 15a and the discharge pipe 20 can be adjusted with each other, and the efficiency of blocking the sludge 11 is increased.

添加管２２は、添加槽２６に貯蔵された中性子吸収体溶液またはスラッジ１１を希釈する希釈液をスラッジ１１に添加する。水などの希釈液および五ホウ酸ナトリウムに代表されるホウ素系やガドリニウム系などの中性子吸収体溶液のいずれも、遮断したスラッジ１１の臨界の防止のために添加される。
なお、スラッジ１１は必ずしも、容器１２の外部に排出される必要はなく、遮断の後に、容器１２に貯蔵されたまま臨界管理されてもよい。 The addition tube 22 adds a neutron absorber solution stored in the addition tank 26 or a diluent for diluting the sludge 11 to the sludge 11. A dilute solution such as water and a boron-based or gadolinium-based neutron absorber solution represented by sodium pentaborate are both added to prevent the criticality of the blocked sludge 11.
The sludge 11 does not necessarily have to be discharged to the outside of the container 12 and may be critically managed while being stored in the container 12 after being shut off.

中性子吸収体溶液の添加により（１）式の中性子無限増倍率ｋ∞を小さくできる。また、希釈液を添加することで、液体の外部へ排出した後のスラッジ１１の管理が容易となる。ただし、希釈液の添加は実効増倍率ｋeffを増加させることに寄与することもある。よって、スラッジ１１の濃度が十分低いことがわかっており、濃度管理もする場合に希釈液が添加できる。 The addition of the neutron absorber solution (1) can be reduced neutron infinite multiplication factor k ∞ of Formula. Moreover, management of the sludge 11 after discharging | emitting to the exterior of a liquid becomes easy by adding a dilution liquid. However, the addition of the diluent may contribute to increasing the effective multiplication factor k eff . Therefore, it is known that the concentration of the sludge 11 is sufficiently low, and a diluent can be added when the concentration is controlled.

回収管２３は、仕切手段１５ａでスラッジ１１を覆った後に、仕切手段１５ａの上部の液体を回収する。回収管２３の浸水している開口端にはストレーナまたはフィルタなどの除去手段２５が装着され、不純物を除去しながら回収する。   The recovery pipe 23 recovers the liquid on the upper part of the partitioning means 15a after covering the sludge 11 with the partitioning means 15a. A removal means 25 such as a strainer or a filter is attached to the open end of the collection pipe 23 that is submerged, and the collection is performed while removing impurities.

次に第１実施形態にかかるスラッジ遮断装置１０Ａの動作手順を図１３を用いて説明する。図１３は各実施形態にかかるスラッジ遮断装置１０Ａの動作手順を示すフローチャートである。   Next, the operation procedure of the sludge blocking apparatus 10A according to the first embodiment will be described with reference to FIG. FIG. 13 is a flowchart showing an operation procedure of the sludge blocking apparatus 10A according to each embodiment.

まず、支持部材１３ａの脚部１８を調節して距離ｄを変数に含むバックリングＢ２が（２）式を満たしてスラッジ１１が臨界に達しない長さに調節する（ステップＳ１０）。すなわち、脚部１８は、仕切手段１５ａに界面１４が達してもスラッジ１１の厚さが十分に臨界を下回るように調整される。 First, buckling B 2 including distance d variable by adjusting the leg 18 of the support member 13a (2) Sludge 11 satisfy the formula is adjusted to a length that does not reach the critical (step S10). That is, the leg portion 18 is adjusted so that the thickness of the sludge 11 is sufficiently less than critical even when the interface 14 reaches the partitioning means 15a.

次に、仕切手段１５ａを畳んだ状態で支持部材１３ａをスラッジ１１の近傍に設置する（ステップＳ１１）。なお、支持部材１３ａの設置の後に脚部１８の長さを調節してもよい。すると、仕切手段１５ａが界面１４の近傍に配置されることになる（ステップＳ１２）。
そして、留具１９を外し、仕切手段１５ａを動作させて界面１４を覆う（ステップＳ１３）。 Next, the support member 13a is installed in the vicinity of the sludge 11 with the partitioning means 15a folded (step S11). In addition, you may adjust the length of the leg part 18 after installation of the supporting member 13a. Then, the partitioning means 15a is disposed in the vicinity of the interface 14 (step S12).
And the fastener 19 is removed, the partition means 15a is operated, and the interface 14 is covered (step S13).

次に、添加管２２で希釈液または中性子吸収体溶液をスラッジ１１に添加する（ステップＳ１４）。そして、スラッジ１１を排出管２０で容器１２の外部に排出する（ステップＳ１５）。また、仕切手段１５ａの上部に溜まっている液体を回収管２３で回収する（ステップＳ１６）。
なお、液体の回収およびスラッジ１１の排出は同時であってもどちらかが先であってもよい。また、状況に応じて、スラッジ１１は、容器１２の外部に排出されずに、容器１２に貯蔵されたまま臨界管理されてもよい。 Next, a diluting solution or a neutron absorber solution is added to the sludge 11 with the addition tube 22 (step S14). Then, the sludge 11 is discharged out of the container 12 through the discharge pipe 20 (step S15). Further, the liquid collected in the upper part of the partitioning means 15a is recovered by the recovery pipe 23 (step S16).
Note that the recovery of the liquid and the discharge of the sludge 11 may be performed at the same time or one of them may be performed first. Further, depending on the situation, the sludge 11 may be critically managed while being stored in the container 12 without being discharged to the outside of the container 12.

以上のように、第１実施形態にかかるスラッジ遮断装置１０Ａによれば、簡素化された構造で核燃料物質を含むスラッジ１１の臨界および広範囲への散逸を防止することができる。さらに、仕切手段１５ａの上部に貯められた液体へのスラッジ１１の混入を低減させることで、回収される液体の核燃料物質の臨界管理が容易になる。   As described above, according to the sludge blocking apparatus 10A according to the first embodiment, it is possible to prevent the sludge 11 including the nuclear fuel material from being critical and dissipating to a wide range with a simplified structure. Furthermore, by reducing the mixing of the sludge 11 into the liquid stored in the upper part of the partitioning means 15a, the critical management of the nuclear fuel material of the recovered liquid becomes easy.

（第２実施形態）
図６（Ａ）は第２実施形態にかかるスラッジ遮断装置１０Ｂ（１０）を設置した容器１２の断面図であり、図６（Ｂ）は図６（Ａ）のスラッジ遮断装置１０Ｂでスラッジ１１を遮断した状態を示す図である。 (Second Embodiment)
FIG. 6A is a cross-sectional view of the container 12 in which the sludge blocking device 10B (10) according to the second embodiment is installed, and FIG. 6B shows the sludge 11 with the sludge blocking device 10B of FIG. It is a figure which shows the state interrupted | blocked.

第２実施形態にかかるスラッジ遮断装置１０Ｂは、図６（Ａ），（Ｂ）に示されるように、第１実施形態において、重なり合う仕切手段１５ｂ（１５）どうしがその面上でスライドするものに替わり、動作手段１６ｂ（１６）はこの仕切手段１５ｂどうしを一定の範囲でスライドさせる機構となる。   As shown in FIGS. 6A and 6B, the sludge blocking device 10B according to the second embodiment is such that, in the first embodiment, the overlapping partitioning means 15b (15) slide on the surface. Instead, the operating means 16b (16) is a mechanism for sliding the partitioning means 15b within a certain range.

動作手段１６ｂは、例えば、２枚の仕切手段１５ｂ（１５ｂｓ，１５ｂｔ）の組で、上側の仕切手段１５ｂｓと下側の仕切手段１５ｂｔの板面上に互いに緩やかに噛みあうように設けられた凹凸である。そして接続された駆動部（図示せず）により、仕切手段１５ｂｓは仕切手段１５ｂｔの板面上をスライドして、図６（Ｂ）に示すようにスラッジ１１を遮断する。 Operation means 16b, for example, two partition means 15b (15b s, 15b t) a set of, as the upper side of the partitioning means 15b s and a lower side of the partition means 15b t plate surface on each other chewing slowly each other It is the unevenness provided. Then the connected drive unit (not shown), the partition means 15b s is slid over the plate surface of the partition means 15b t, blocking the sludge 11 as shown in FIG. 6 (B).

動作手段１６ｂは、下側の仕切手段１５ｂｔの板面上に敷かれたレールと上側の仕切手段１５ｂｓにつけられてこのレール上を転がるタイヤのようなものであってもよい。
なお、動作手段１６ｂは、上側の仕切手段１５ｂｓが下側の仕切手段１５ｂｔから外れることなく互いの板面を滑らかにスライドできれば、これらの例に限定されない。 Operation means 16b may be one such as tires rolling on the rail attached to the lower side of the partitioning means 15b t partitioning means 15b s rail and upper that is laid on the plate surface of.
The operation unit 16b is if smoothly slide the plate surface of each other without upper partition means 15b s deviates from the lower side of the partition means 15b t, but are not limited to these examples.

図７（Ａ）は第２実施形態のスラッジ遮断装置１０Ｂの変形例を示す図であり、図７（Ｂ）は図７（Ａ）のスラッジ遮断装置１０Ｂでスラッジ１１を遮断した状態を示す図である。動作手段１６ｂは、各仕切手段１５ｂの上下に設けられ、図７（Ａ），（Ｂ）に示されるように、１箇所に重ねられた仕切手段１５ｂを界面１４の全体に広げて覆うようなものでもよい。   FIG. 7A is a view showing a modification of the sludge blocking device 10B of the second embodiment, and FIG. 7B is a view showing a state where the sludge 11 is blocked by the sludge blocking device 10B of FIG. 7A. It is. The operating means 16b is provided above and below each of the partitioning means 15b, and as shown in FIGS. 7 (A) and 7 (B), the partitioning means 15b stacked at one place is spread over the entire interface 14 so as to cover it. It may be a thing.

なお、動作手段１６ｂが仕切手段１５ｂどうしをその板面上でスライドさせるものであること以外は、第２実施形態は第１実施形態と同様の構造および動作手順となるので、重複する説明を省略する。図面においても、共通の構成または機能を有する部分は同一符号で示し、重複する説明を省略する。   Since the second embodiment has the same structure and operation procedure as the first embodiment, except that the operating means 16b slides the partitioning means 15b on the plate surface, the redundant description is omitted. To do. Also in the drawings, portions having a common configuration or function are denoted by the same reference numerals, and redundant description is omitted.

このように、第２実施形態にかかるスラッジ遮断装置１０Ｂによれば、簡素化された構造で核燃料物質を含むスラッジ１１の臨界および広範囲への散逸を防止することができる。さらに、仕切手段１５ｂの上部に貯められた液体へのスラッジ１１の混入を低減させることで、回収される液体の核燃料物質の臨界管理が容易になる。   As described above, according to the sludge blocking device 10B according to the second embodiment, it is possible to prevent the sludge 11 containing nuclear fuel material from being critical and dissipating to a wide range with a simplified structure. Further, by reducing the mixing of the sludge 11 into the liquid stored in the upper part of the partitioning means 15b, the critical management of the nuclear fuel material of the recovered liquid becomes easy.

（第３実施形態）
図８（Ａ）は第３実施形態にかかるスラッジ遮断装置１０Ｃ（１０）の斜視図である。第３実施形態にかかるスラッジ遮断装置１０Ｃは、図８（Ａ）に示されるように、仕切手段１５ｃ（１５）は、可撓性を有するシートであり、動作手段１６ｃ（１６）は、シートを巻きつけるローラである。 (Third embodiment)
FIG. 8A is a perspective view of a sludge blocking device 10C (10) according to the third embodiment. In the sludge blocking device 10C according to the third embodiment, as shown in FIG. 8A, the partitioning means 15c (15) is a flexible sheet, and the operation means 16c (16) is a sheet. It is a roller to wind.

図中右側の支持部材１３ｂｓ（１３ｂ）は動作手段１６ｃを支持する支持部材１３ｂｔ（１３ｂ）に重ねられて液体中に設置される。設置の後、接続される駆動部（図示せず）により、右側の支持部材１３ｂｓは図中のＢ方向へ引かれる。動作手段１６ｃに巻きつけられた仕切手段１５ｃは、支持部材１３ｂｓとともにＢ方向に引かれてスラッジ１１を覆う。
仕切手段１５ｃが可撓性を有するシートであり、支持部材１３ｂｓが可動であることにより、スラッジ１１または容器１２の形状にスラッジ遮断装置１０Ｃを変形できる。 The support member 13b s (13b) on the right side in the figure is placed in the liquid so as to overlap the support member 13b t (13b) that supports the operating means 16c. After installation, the connection to the drive unit (not shown), the right support member 13b s is pulled in the B direction in FIG. Partition means 15c which is wound in the operation unit 16c is pulled in the direction B along with the supporting member 13b s and covering the sludge 11.
A sheet partition means 15c has flexibility, by the supporting member 13b s is movable, can be modified sludge blocking device 10C to the shape of the sludge 11 or container 12.

なお、仕切手段１５ｃが可撓性を有するシートであること、動作手段１６ｃがローラであることおよび支持部材１３ｂが可動であること以外は、第３実施形態は第１実施形態と同様の構造および動作手順となるので、重複する説明を省略する。図面においても、共通の構成または機能を有する部分は同一符号で示し、重複する説明を省略する。   The third embodiment has the same structure and structure as the first embodiment except that the partitioning means 15c is a flexible sheet, the operating means 16c is a roller, and the support member 13b is movable. Since this is an operation procedure, a duplicate description is omitted. Also in the drawings, portions having a common configuration or function are denoted by the same reference numerals, and redundant description is omitted.

図８（Ｂ）は第３実施形態のスラッジ遮断装置１０Ｃの変形例を示す図である。図８（Ｂ）に示すように、支持部材１３ｃ（１３）の形状は固定され、仕切手段１５ｃに設けられた牽引手段２８を引くことで仕切手段１５ｃはＢ方向にひかれ、スラッジ１１の界面１４を覆ってもよい。   FIG. 8B is a view showing a modification of the sludge blocking device 10C of the third embodiment. As shown in FIG. 8B, the shape of the support member 13c (13) is fixed, and the partition means 15c is pulled in the B direction by pulling the traction means 28 provided on the partition means 15c, and the interface 14 of the sludge 11 is drawn. May be covered.

このように、第３実施形態にかかるスラッジ遮断装置１０Ｃによれば、核燃料物質を含むスラッジ１１の臨界および広範囲への散逸を防止することができる。さらに、仕切手段１５ｃの上部に貯められた液体へのスラッジ１１の混入を低減させることで、回収される液体の核燃料物質の臨界管理が容易になる。   As described above, according to the sludge cutoff device 10C according to the third embodiment, it is possible to prevent the sludge 11 including the nuclear fuel material from being critically dissipated to a wide range. Further, by reducing the mixing of the sludge 11 into the liquid stored in the upper part of the partitioning means 15c, the criticality management of the recovered nuclear fuel material becomes easy.

（第４実施形態）
図９（Ａ）は第４実施形態にかかるスラッジ遮断装置１０Ｄ（１０）を設置した容器１２の断面図である。第４実施形態にかかるスラッジ遮断装置１０Ｄは、第１実施形態において、仕切手段１５ｄ（１５）は、沈降してくるスラッジ１１を仕切手段１５ｄの底面側に沈積させるとともにその逆流を抑止する逆止手段２１を備える。 (Fourth embodiment)
FIG. 9A is a cross-sectional view of the container 12 in which the sludge blocking device 10D (10) according to the fourth embodiment is installed. In the sludge blocking device 10D according to the fourth embodiment, in the first embodiment, the partition unit 15d (15) is a check that deposits the sedimenting sludge 11 on the bottom surface side of the partition unit 15d and suppresses the backflow thereof. Means 21 are provided.

仕切手段１５ｄの配置の際に未だスラッジ１１が沈降してくる場合は、スラッジ１１を完全に覆うと、仕切手段１５ｄの上面にスラッジ１１が沈積してしまう。すると、スラッジ１１を遮断したことにはならず、液体の回収の際などにスラッジ１１が散逸し、または臨界を超えてしまう。   If the sludge 11 still sinks when the partitioning means 15d is disposed, the sludge 11 will be deposited on the upper surface of the partitioning means 15d if the sludge 11 is completely covered. Then, the sludge 11 is not shut off, and the sludge 11 is dissipated or exceeds the criticality when recovering the liquid.

そこで、図９（Ａ）に示されるように、仕切手段１５ｄを緩やかに曲げて仕切手段１５ｄどうしを接触させずに重ならせて逆止手段２１とし、沈降してくるスラッジ１１が仕切手段１５ｄに沈積することを防ぐ。その一方で、仕切手段１５ｄの底面側に沈積したスラッジ１１が逆流して散逸することを防ぐ。   Therefore, as shown in FIG. 9 (A), the partitioning means 15d is gently bent so that the partitioning means 15d are overlapped without contacting each other to form a check means 21, and the sludge 11 that has settled is separated into the partitioning means 15d. To prevent it from depositing. On the other hand, the sludge 11 deposited on the bottom side of the partitioning means 15d is prevented from flowing back and dissipating.

図９（Ｂ）は第４実施形態のスラッジ遮断装置１０Ｄの変形例を示す図である。図９（Ｂ）に示されるように、仕切手段１５ｄの端部に弾力性をもたせて逆止手段２１とし、スラッジ１１の重さにより端部が撓んでできる隙間からスラッジ１１を底面側に沈積させてもよい。   FIG. 9B is a view showing a modification of the sludge blocking device 10D of the fourth embodiment. As shown in FIG. 9B, the end of the partitioning means 15d is made elastic so as to be a non-return means 21, and the sludge 11 is deposited on the bottom side from the gap formed by the end being bent by the weight of the sludge 11. You may let them.

逆止手段２１は、その他従来各種のものが知られており、これらのうち任意のものを使用することができる。なお、第１実施形態に限らず、各実施形態において、逆止手段２１を備えることができる。また、図９（Ａ），（Ｂ）においては、仕切手段１５ｄの一部に逆止手段２１を備えた仕切手段１５ｄを記載しているが、仕切手段１５の全部を仕切手段１５ｄとしてもよい。   Various other conventional check means 21 are known, and any of these can be used. In addition to the first embodiment, the check means 21 can be provided in each embodiment. 9A and 9B show the partitioning means 15d provided with the check means 21 in a part of the partitioning means 15d, the whole partitioning means 15 may be the partitioning means 15d. .

なお、仕切手段１５ｄが逆止手段２１を備えること以外は、第３実施形態は第１実施形態と同様の構造および動作手順となるので、重複する説明を省略する。図面においても、共通の構成または機能を有する部分は同一符号で示し、重複する説明を省略する。   In addition, since 3rd Embodiment becomes a structure and operation | movement procedure similar to 1st Embodiment except that the partition means 15d is provided with the non-return means 21, the overlapping description is abbreviate | omitted. Also in the drawings, portions having a common configuration or function are denoted by the same reference numerals, and redundant description is omitted.

このように、仕切手段１５ｄが逆止手段２１を備えることで、スラッジ１１が未だ沈降してくる場合でも、仕切手段１５ｄに沈積することを防止するとともに沈積したスラッジ１１が散逸すること防止することができる。   Thus, by providing the partitioning means 15d with the check means 21, even when the sludge 11 still sinks, it prevents the sedimentation sludge 11 from being dissipated while preventing the sedimentation on the partitioning means 15d. Can do.

このように、第４実施形態にかかるスラッジ遮断装置１０Ｄによれば、簡素化された構造で核燃料物質を含むスラッジ１１の臨界および広範囲への散逸を防止することができる。さらに、仕切手段１５ｄの上部に貯められた液体へのスラッジ１１の混入を低減させることで、回収される液体の核燃料物質の臨界管理が容易になる。   As described above, according to the sludge blocking device 10D according to the fourth embodiment, it is possible to prevent the sludge 11 containing nuclear fuel material from being critical and dissipating to a wide range with a simplified structure. Further, by reducing the mixing of the sludge 11 into the liquid stored in the upper part of the partitioning means 15d, the critical management of the nuclear fuel material of the recovered liquid becomes easy.

（第５実施形態）
図１０は、第５実施形態にかかるスラッジ遮断装置１０Ｅ（１０）の斜視図である。第５実施形態にかかるスラッジ遮断装置１０Ｅは、図１０に示されるように、仕切手段１５ｅ（１５）は、動作手段１６ｄ（１６）により、第１実施形態の仕切手段１５ａどうしが幅方向に連結されて一方向にのみに可撓性を有する一方向可撓シートとなる。 (Fifth embodiment)
FIG. 10 is a perspective view of a sludge blocking device 10E (10) according to the fifth embodiment. As shown in FIG. 10, in the sludge blocking device 10E according to the fifth embodiment, the partition means 15e (15) is connected to the partition means 15a of the first embodiment in the width direction by the operating means 16d (16). Thus, a unidirectional flexible sheet having flexibility only in one direction is obtained.

仕切手段１５ｅは、支持部材１３ｄ（１３）の一側面に平行に収納されてスラッジ１１の近傍に設置される。設置の後、仕切手段１５ｅが自重により図中のＢ方向に滑り込むのを防止するストッパ（図示せず）が外され、仕切手段１５ｅは支持部材１３ｄの形状に沿って滑り込む。
なお、仕切手段１５ｅが、支持部材１３ｄの他側面まで滑り込むように脚部１８の長さを変え、支持部材１３ｄにスラッジ１１の界面１４を下回らない程度に傾きを持たせてもよい。 The partition means 15e is housed in parallel with one side surface of the support member 13d (13) and is installed in the vicinity of the sludge 11. After the installation, a stopper (not shown) that prevents the partitioning means 15e from sliding in the direction B in the figure due to its own weight is removed, and the partitioning means 15e slides along the shape of the support member 13d.
The length of the leg portion 18 may be changed so that the partitioning means 15e slides to the other side surface of the support member 13d, and the support member 13d may be inclined so as not to fall below the interface 14 of the sludge 11.

なお、仕切手段１５ｅが一方向可撓シートであること以外は、第５実施形態は第１実施形態と同様の構造および動作手順となるので、重複する説明を省略する。図面においても、共通の構成または機能を有する部分は同一符号で示し、重複する説明を省略する。   Since the fifth embodiment has the same structure and operation procedure as the first embodiment except that the partitioning means 15e is a one-way flexible sheet, a duplicate description is omitted. Also in the drawings, portions having a common configuration or function are denoted by the same reference numerals, and redundant description is omitted.

このように、仕切手段１５ｅが自重でスラッジ１１を覆うように配置されることにより、仕切手段１５ｅに動力を付与する駆動部を不要とすることができる。   As described above, the partition unit 15e is disposed so as to cover the sludge 11 with its own weight, so that a drive unit for applying power to the partition unit 15e can be omitted.

以上のように、第５実施形態にかかるスラッジ遮断装置１０Ｅによれば、核燃料物質を含むスラッジ１１の臨界および広範囲への散逸を防止することができる。さらに、仕切手段１５ｅの上部に貯められた液体へのスラッジ１１の混入を低減させることで、回収される液体の核燃料物質の臨界管理が容易になる。   As described above, according to the sludge blocking device 10E according to the fifth embodiment, it is possible to prevent the sludge 11 containing the nuclear fuel material from being critically dissipated to a wide range. Further, by reducing the mixing of the sludge 11 into the liquid stored in the upper part of the partitioning means 15e, criticality management of the recovered nuclear fuel material can be facilitated.

（第６実施形態）
図１１は、図１１（Ａ）は第６実施形態にかかるスラッジ遮断装置１０Ｆ（１０）を設置した容器１２の断面図、図１１（Ｂ）は第６実施形態にかかるスラッジ遮断装置１０Ｆでスラッジ１１を遮断した状態を示す図である。 (Sixth embodiment)
11A is a cross-sectional view of the container 12 in which the sludge blocking device 10F (10) according to the sixth embodiment is installed, and FIG. 11B is a sludge blocking device 10F according to the sixth embodiment. It is a figure which shows the state which interrupted | blocked 11. FIG.

図１１（Ａ）に示されるように、第６実施形態にかかるスラッジ遮断装置１０Ｆは、第１実施形態から第４実施形態で示された仕切手段１５（１５ａ〜１５ｅ）が、上下方向に複数段配置される。容器１２またはスラッジ１１の形状に合わせて各段で仕切手段１５の種類が選択されて組み合わせられる。１段の仕切手段１５でスラッジ１１を十分に遮断できない場合でも、仕切手段１５が複数段配置されることにより、スラッジ遮断装置１０Ｆの全体で十分な遮断が可能となる。   As shown in FIG. 11A, the sludge blocking apparatus 10F according to the sixth embodiment includes a plurality of partitioning means 15 (15a to 15e) shown in the first to fourth embodiments in the vertical direction. Stepped. According to the shape of the container 12 or the sludge 11, the type of the partitioning means 15 is selected and combined at each stage. Even when the sludge 11 cannot be sufficiently blocked by the one-stage partitioning means 15, the partitioning means 15 is arranged in a plurality of stages, so that the sludge blocking device 10F can be sufficiently blocked.

さらに、例えば、遮断性が高い一方で配置の際にスラッジ１１を舞い上げてしまう仕切手段１５を、先にスラッジ１１を舞い上がらせずにある程度遮断する仕切手段１５と組み合わせることでそれぞれの仕切手段１５の脆弱な部分を強化できる。   Further, for example, the partitioning means 15 that lifts up the sludge 11 during placement while having a high shut-off property is combined with the partitioning means 15 that shuts off the sludge 11 without raising the sludge 11 first. The weak part of can be strengthened.

次に、図１２は、各実施形態にかかるスラッジ遮断装置１０（１０Ａ〜１０Ｆ）を容器１２に複数敷き詰めた上面図である。
容器１２は、例えば、復水器などのタービン建屋の各種設備、原子炉建屋の各種設備または建屋そのものなどであり、その形状は多様である。そこで、図１２に示されるように、スラッジ遮断装置１０を複数用いることで容器１２の形状または排出管２０の配置などに合わせてスラッジ１１を不足なく覆う。 Next, FIG. 12 is a top view in which a plurality of sludge blocking devices 10 (10A to 10F) according to each embodiment are spread on the container 12. FIG.
The container 12 is, for example, various facilities of a turbine building such as a condenser, various facilities of a reactor building, or the building itself, and the shapes thereof are various. Therefore, as shown in FIG. 12, by using a plurality of sludge blocking devices 10, the sludge 11 is covered without deficiency according to the shape of the container 12 or the arrangement of the discharge pipe 20.

この場合も、第１実施形態から第４実施形態で示されたスラッジ遮断装置１０が適宜組み合わせられる。隣り合ったスラッジ遮断装置１０どうしを連結させる場合は、必ずしもすべてのスラッジ遮断装置１０が脚部１８を備える必要はなくなる。   Also in this case, the sludge blocking device 10 shown in the first to fourth embodiments is appropriately combined. When connecting the sludge blocking devices 10 adjacent to each other, it is not always necessary that all the sludge blocking devices 10 include the leg portions 18.

なお、仕切手段１５またはスラッジ遮断装置１０そのものを複数組み合わせること以外は、第６実施形態は各実施形態と同様の構造および動作手順となるので、重複する説明を省略する。図面においても、共通の構成または機能を有する部分は同一符号で示し、重複する説明を省略する。   Except for combining a plurality of partitioning means 15 or sludge blocking device 10 itself, the sixth embodiment has the same structure and operation procedure as the respective embodiments, and therefore, a duplicate description is omitted. Also in the drawings, portions having a common configuration or function are denoted by the same reference numerals, and redundant description is omitted.

このように、仕切手段１５またはスラッジ遮断装置１０の全体を複数組み合わせることによって、遮断の脆弱な部分を強化することができる。また、容器１２の形状や排出管２０の配置などに合わせてスラッジ１１を不足なく覆うことができる。   In this way, by combining a plurality of partitioning means 15 or sludge blocking device 10 as a whole, the vulnerable portion of blocking can be strengthened. In addition, the sludge 11 can be covered without deficiency in accordance with the shape of the container 12 and the arrangement of the discharge pipe 20.

以上のべた少なくとも一つの実施形態のスラッジ遮断装置１０によれば、簡素化された構造で核燃料物質を含むスラッジ１１の界面１４を覆うことにより、スラッジ１１の臨界および広範囲への散逸を防止することが可能となる。さらに、仕切手段１５の上部に貯められた液体へのスラッジ１１の混入を低減させることで、回収される液体の核燃料物質の臨界管理が容易になる。   According to the sludge blocking device 10 of at least one embodiment as described above, the sludge 11 is prevented from being dissipated to the critical and wide area by covering the interface 14 of the sludge 11 containing nuclear fuel material with a simplified structure. Is possible. Further, by reducing the mixing of the sludge 11 into the liquid stored in the upper part of the partitioning means 15, the critical management of the recovered nuclear fuel material becomes easy.

本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更、組み合わせを行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。   Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, changes, and combinations can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

１０（１０Ａ〜１０Ｆ）…スラッジ遮断装置、１１…スラッジ、１２…容器、１３〔１３ａ，１３ｂ（１３ｂｓ，１３ｂｔ），１３ｃ，１３ｄ〕…支持部材、１４…界面、１５〔１５ａ，１５ｂ（１５ｂｓ，１５ｂｔ），１５ｃ，１５ｄ，１５ｅ〕…仕切手段、１６〔１６ａ（１６ａｓ，１６ａｔ），１６ｂ，１６ｃ，１６ｄ〕…動作手段、１８…脚部、１９…留具、２０…排出管、２１…逆止手段、２２…添加管、２３…回収管、２４…開口部、２５…除去手段、２６…添加槽、２８…牽引手段、ｄ…距離、Ｂ2…バックリング、ｋ∞…中性子無限増倍率、ｋeff…中性子実効増倍率、ｋＬ…推定臨界下限増倍率、Ａ，Ｂ…方向。 10 (10A to 10F) ... sludge blocking device, 11 ... sludge, 12 ... container, 13 [13a, 13b (13b s , 13b t ), 13c, 13d] ... support member, 14 ... interface, 15 [15a, 15b ( 15 b s , 15 b t ), 15 c, 15 d, 15 e] ... partitioning means, 16 [16 a (16 a s , 16 a t ), 16 b, 16 c, 16 d] ... operating means, 18 ... legs, 19 ... fasteners, 20 ... Discharge pipe, 21 ... check means, 22 ... addition pipe, 23 ... recovery pipe, 24 ... opening, 25 ... removal means, 26 ... addition tank, 28 ... traction means, d ... distance, B 2 ... buckling, k ∞ ... Neutron infinite multiplication factor, k eff ... Neutron effective multiplication factor, k L ... Estimated critical lower limit multiplication factor, A, B ... direction.

Claims (11)

核燃料物質を含むスラッジが液体中に沈積している容器に沈められて前記容器の底部に設置される支持部材と、
前記支持部材に支持されるとともに液相と固相の界面の近傍に配置される仕切手段と、
前記界面を覆うように前記仕切手段を動作させる動作手段と、を備えることを特徴とするスラッジ遮断装置。 A support member that is submerged in a container in which sludge containing nuclear fuel material is deposited in a liquid and installed at the bottom of the container;
Partition means supported by the support member and disposed in the vicinity of the interface between the liquid phase and the solid phase;
And an operating means for operating the partitioning means so as to cover the interface. 前記支持部材は、前記スラッジが沈積する底面からの前記仕切手段の距離を、前記仕切手段に前記界面が達しても前記スラッジの厚さが十分に臨界を下回るように調整する脚部を備えることを特徴とする請求項１に記載のスラッジ遮断装置。 The support member includes a leg portion that adjusts the distance of the partition means from the bottom surface on which the sludge is deposited so that the thickness of the sludge is sufficiently less than critical even when the interface reaches the partition means. The sludge cutoff device according to claim 1. 前記仕切手段は、中性子吸収体を含むことを特徴とする請求項１または請求項２に記載のスラッジ遮断装置。 The sludge blocking device according to claim 1 or 2, wherein the partition means includes a neutron absorber. 前記スラッジを希釈する希釈液または中性子吸収体溶液を前記スラッジに添加する添加管を備えることを特徴とする請求項１から請求項３のいずれか１項に記載のスラッジ遮断装置。 The sludge blocking device according to any one of claims 1 to 3, further comprising an addition pipe for adding a diluent or a neutron absorber solution for diluting the sludge to the sludge. 前記スラッジの付近に沈設された開口部から前記スラッジを前記容器の外部に排出する排出管を備えることを特徴とする請求項１から請求項４のいずれか１項に記載のスラッジ遮断装置。 The sludge blocking device according to any one of claims 1 to 4, further comprising a discharge pipe that discharges the sludge to the outside of the container from an opening set in the vicinity of the sludge. 前記仕切手段は、沈降してくるスラッジを前記仕切手段の底面側に沈積させるとともにその逆流を抑止する逆止手段を備えることを特徴とする請求項１から請求項５のいずれか１項に記載のスラッジ遮断装置。 The said partition means is provided with the non-return means which suppresses the reverse flow while depositing the sludge which settles in the bottom face side of the said partition means, The Claim 1 characterized by the above-mentioned. Sludge blocking device. 前記仕切手段は、分割された仕切板であり、
前記動作手段は、前記仕切手段を前記支持部材または他の仕切板に連結することを特徴とする請求項１から請求項６のいずれか１項に記載のスラッジ遮断装置。 The partition means is a divided partition plate,
The sludge blocking device according to any one of claims 1 to 6, wherein the operating unit connects the partition unit to the support member or another partition plate. 前記動作手段は前記仕切手段どうしをその板面上でスライドさせることを特徴とする請求項６に記載のスラッジ遮断装置。   The sludge blocking device according to claim 6, wherein the operating means slides the partition means on the plate surface. 前記仕切手段は、可撓性を有するシートであり、
前記動作手段は、前記シートを巻きつけるローラであることを特徴とする請求項１から請求項６のいずれか１項に記載のスラッジ遮断装置。 The partition means is a flexible sheet,
The sludge blocking device according to any one of claims 1 to 6, wherein the operating means is a roller for winding the sheet. 前記仕切手段は、上下方向に複数段配置されることを特徴とする請求項１から請求項９のいずれか１項に記載のスラッジ遮断装置。 The sludge blocking device according to any one of claims 1 to 9, wherein the partitioning means is arranged in a plurality of stages in the vertical direction. 核燃料物質を含むスラッジが液体に沈積している容器の底部に支持部材を沈めて設置するステップと、
前記支持部材に支持される仕切手段を液相と固相の界面の近傍に配置するステップと、
前記界面を覆うように前記仕切手段を動作させるステップと、を含むことを特徴とするスラッジ遮断方法。 Sinking the support member at the bottom of the container in which the sludge containing nuclear fuel material is deposited in the liquid; and
Disposing partition means supported by the support member in the vicinity of the interface between the liquid phase and the solid phase;
Operating the partition means so as to cover the interface.
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