JPH0719033Y2 - Drip tray - Google Patents
Drip trayInfo
- Publication number
- JPH0719033Y2 JPH0719033Y2 JP1989043774U JP4377489U JPH0719033Y2 JP H0719033 Y2 JPH0719033 Y2 JP H0719033Y2 JP 1989043774 U JP1989043774 U JP 1989043774U JP 4377489 U JP4377489 U JP 4377489U JP H0719033 Y2 JPH0719033 Y2 JP H0719033Y2
- Authority
- JP
- Japan
- Prior art keywords
- drip tray
- tray
- present
- solution
- absorbing material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- 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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Stackable Containers (AREA)
- Radiation-Therapy Devices (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、使用済燃料再処理施設等の液体状の核分裂性
物質を扱う施設において、液体状核分裂性物質を貯蔵す
る貯槽の下方に配置されるドリップトレイに関する。[Detailed Description of the Invention] [Industrial field of application] The present invention is arranged below a storage tank for storing a liquid fissile material in a facility that handles a liquid fissile material such as a spent fuel reprocessing facility. Regarding drip trays.
プルトニウム等の核分裂性物質を含む溶液を貯蔵する貯
槽の下方には、万一、貯槽が破損して溶液が漏洩した場
合に備えて、漏洩した溶液を収容するドリップトレイが
配置される。この場合、ドリップトレイは、貯槽内の溶
液全量を収容できることが必要であると共に、臨界とな
らないように形状管理、すなわちドリップトレイ内に収
容される溶液の深さが所定深さ（プルトニウム溶液の場
合約10cm程度以下）を超えないように管理する必要があ
る。Below the storage tank for storing the solution containing fissile material such as plutonium, a drip tray for storing the leaked solution is arranged in case the storage tank is damaged and the solution leaks. In this case, the drip tray must be able to store the entire amount of the solution in the storage tank, and the shape must be controlled so that it does not become critical, that is, the depth of the solution stored in the drip tray is a predetermined depth (in the case of plutonium solution). It is necessary to manage it so that it does not exceed about 10 cm).
ところで、従来、ドリップトレイとしては、四角形の箱
状のものが知られているが、この場合、臨界管理上、溶
液の収容深さを深くできないため、収容面積を広くとる
必要があり、ドリップトレイの設置面積が嵩むという問
題がある。By the way, conventionally, as a drip tray, a rectangular box-shaped one is known, but in this case, since the storage depth of the solution cannot be deepened due to the criticality control, it is necessary to make the storage area wide. However, there is a problem that the installation area of is increased.
また、中性子吸収材としてほうけい酸ガラス製のラシヒ
リングを入れたドリップトレイも知られている。この場
合、上記従来のドリップトレイのみのものに比べて核的
により厳しい条件に対応し得るが、ガラス製のため落下
物等により損傷を受け易い問題があるほか、ドリップト
レイ内に充填された多数のガラス製ラシヒリングの機能
健全性を確認するための定期検査が行いにくいという問
題がある。Also known is a drip tray containing Raschig rings made of borosilicate glass as a neutron absorber. In this case, compared to the conventional drip tray alone, it is possible to deal with severer conditions, but since it is made of glass, there is a problem that it is easily damaged by falling objects. There is a problem that it is difficult to carry out a periodical inspection to confirm the functional integrity of the glass Raschig ring.
本考案は、上記事情に鑑みてなされたもので、その目的
とするところは、中性子吸収効果が大きく、従来に比べ
て核的にさらに厳しい条件下でも使用でき、また、設備
面積を低減できる上に、構造強度に優れ定期検査が行い
易いドリップトレイを提供することにある。The present invention has been made in view of the above circumstances, and its purpose is to have a large neutron absorption effect, can be used under more severely nuclear conditions than conventional ones, and can reduce the equipment area. Another object of the present invention is to provide a drip tray that has excellent structural strength and is easy to perform regular inspections.
上記目的を達成するために、本考案は、トレイ本体の内
部に、格子状に組んでなる中性子吸収材が配置されたも
のである。In order to achieve the above object, the present invention is one in which a neutron absorbing material assembled in a lattice shape is arranged inside a tray body.
本考案のドリップトレイにあっては、トレイ本体内の構
造強度に優れた格子状の中性子吸収材によって、トレイ
本体内に収容された溶液を未臨界に保持する。In the drip tray of the present invention, the lattice-shaped neutron absorbing material having excellent structural strength inside the tray body holds the solution contained in the tray body subcritically.
以下、第１図から第２図に基づいて本考案の一実施例を
説明する。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
第１図は本考案の一実施例を示すドリップトレイの平面
図、第２図は同断面図である。これらの図において符号
１はコンクリート製の側壁２、床３に沿って敷設された
トレイ本体であり、このトレイ本体１はステンレス鋼製
で箱状に形成されている。そして、上記トレイ本体１内
には、ボロン入りステンレス鋼、ボロン入りアルミ合金
（ステンレス鋼被覆）等でできている板状の中性子吸収
材４が溶接又は嵌合にて格子状に組まれた状態で装着さ
れている。FIG. 1 is a plan view of a drip tray showing an embodiment of the present invention, and FIG. 2 is a sectional view of the same. In these drawings, reference numeral 1 is a tray main body laid along a concrete side wall 2 and a floor 3, and the tray main body 1 is made of stainless steel and formed into a box shape. In the tray body 1, a plate-shaped neutron absorber 4 made of boron-containing stainless steel, boron-containing aluminum alloy (stainless steel coating), or the like is welded or fitted to form a lattice shape. It is installed in.
上記のように構成されたドリップトレイを、液体状核分
裂性物質の入った貯槽の下方に配置した場合にあって
は、万一、貯槽内から核分裂性物質を含んだ溶液が漏洩
した場合であっても、円滑にドリップトレイ内に収容さ
れ、しかも格子状の中性子吸収材４によって確実に未臨
界の状態に保持される。If the drip tray configured as described above is placed below the storage tank containing the liquid fissile material, in the unlikely event that the solution containing the fissile material leaks from the storage tank. However, they are smoothly accommodated in the drip tray, and are reliably held in a subcritical state by the lattice-shaped neutron absorbing material 4.
この場合、本考案のドリップトレイの中性子吸収効果
は、従来の中性子吸収材を備えていないドリップトレイ
より優れているのは勿論のこと、ラシヒリング入りのド
リップトレイに比べても核的により厳しい条件にも対応
し得る。In this case, the neutron absorption effect of the drip tray of the present invention is superior to that of the conventional drip tray without the neutron absorbing material, and even more severe than the drip tray with Raschig rings. Can also correspond.
一例としてラシヒリング入りのドリップトレイと本考案
のドリップトレイに対して、それぞれ無限体系における
未臨界条件（中性子増倍率0.85）を比較した。（前者に
ついては、Use of borosilicate−glass raschig rings
as a neutron absorber in solutions of fissile mat
erial,ANSI/ANS−8.5−1986.参照、後者については計算
を行った。） なお、収容する溶液は硝酸プルトニウム（Pu同位体比:P
u−239 100％）とする。As an example, the subcritical condition (neutron multiplication factor 0.85) in an infinite system was compared between the drip tray with Raschig rings and the drip tray of the present invention. (For the former, use of borosilicate−glass raschig rings
as a neutron absorber in solutions of fissile mat
erial, ANSI / ANS-8.5-1986. The latter was calculated. ) The solution contained is plutonium nitrate (Pu isotope ratio: P
u-239 100%).
表１に示すように、同種類の溶液の場合、本考案の格子
状中性子吸収材付ドリップトレイは、従来のラシヒリン
グ入りドリップトレイよりも大容量の溶液を扱うことが
可能であり、収容効率が高い。また、地震等の異常時に
おいても、本考案のドリップトレイの中性子吸収材４は
金属製であるため、ガラス状のラシヒリングに比べて壊
れにくく、しかも格子状にしっかり組まれているため、
位置ずれを起こす可能性も極めて低い。さらに、多数の
ラシヒリング入りのドリップトレイに比べて取扱い易い
上に、定期検査を容易に行える。As shown in Table 1, in the case of the same type of solution, the drip tray with a lattice-shaped neutron absorber of the present invention can handle a larger volume of solution than the conventional drip tray with Raschig rings, and the storage efficiency is higher. high. Further, even in the event of an abnormal event such as an earthquake, since the neutron absorbing material 4 of the drip tray of the present invention is made of metal, it is harder to break than the glass-like Raschig ring, and is firmly assembled in a lattice shape.
The possibility of misalignment is extremely low. Further, it is easier to handle than a drip tray with a large number of Raschig rings, and the periodic inspection can be easily performed.
さらにまた、本考案のドリップトレイは溶液が格子状の
中性子吸収材で小区画に区切られているため、中性子吸
収材を備えていないドリップトレイに比べて地震時にも
スロッシング（波立ち）を起こしにくい。Furthermore, since the solution of the drip tray of the present invention is divided into small compartments by the lattice-shaped neutron absorbing material, it is less likely to cause sloshing (undulation) even during an earthquake as compared with the drip tray which does not have the neutron absorbing material.
以上説明したように、本考案は、トレイ本体の内部に、
格子状に組んでなる中性子吸収材が配置されたものであ
るから、トレイ本体内の格子状の中性子吸収材によっ
て、トレイ本体内に収容された溶液を未臨界に保持する
ことにより、中性子吸収効果が大きく、従来のドリップ
トレイに比べて核的にさらに厳しい条件下でも使用でき
て、設置面積を低減できる上に、定期検査が行い易いと
共に、地震等の異常時においても健全性が良好に保たれ
る。As described above, the present invention is
Since the neutron absorbing material that is assembled in a lattice shape is arranged, by the lattice-shaped neutron absorbing material in the tray body, by holding the solution contained in the tray body subcritical, the neutron absorption effect It has a large size, can be used under more severe conditions compared to conventional drip trays, and can reduce the installation area.It also facilitates regular inspections and maintains good soundness even during abnormal conditions such as earthquakes. Be drunk
第１図から第２図は本考案の一実施例を示すもので、第
１図は平面図、第２図は断面図である。 １……トレイ本体、４……中性子吸収材。1 to 2 show an embodiment of the present invention. FIG. 1 is a plan view and FIG. 2 is a sectional view. 1 ... Tray body, 4 ... Neutron absorber.
Claims (1)
に配置されてなるドリップトレイにおいて、トレイ本体
の内部に、格子状に組んでなる中性子吸収材が配置され
たことを特徴とするドリップトレイ。1. A drip tray arranged below a storage tank for storing a liquid fissionable material, wherein a neutron absorbing material assembled in a lattice is arranged inside the tray body. tray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989043774U JPH0719033Y2 (en) | 1989-04-14 | 1989-04-14 | Drip tray |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989043774U JPH0719033Y2 (en) | 1989-04-14 | 1989-04-14 | Drip tray |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02135899U JPH02135899U (en) | 1990-11-13 |
| JPH0719033Y2 true JPH0719033Y2 (en) | 1995-05-01 |
Family
ID=31556475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989043774U Expired - Lifetime JPH0719033Y2 (en) | 1989-04-14 | 1989-04-14 | Drip tray |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0719033Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013205127A (en) * | 2012-03-28 | 2013-10-07 | Hitachi-Ge Nuclear Energy Ltd | Nuclear fuel material cutting device and cutting method in nuclear plant |
| JP6180748B2 (en) * | 2013-02-06 | 2017-08-16 | 株式会社東芝 | Sedimentation separation apparatus and sedimentation separation method for radioactive liquid waste |
-
1989
- 1989-04-14 JP JP1989043774U patent/JPH0719033Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02135899U (en) | 1990-11-13 |
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