JPS5934995B2 - Radioactive alkali metal removal and recovery equipment - Google Patents
Radioactive alkali metal removal and recovery equipmentInfo
- Publication number
- JPS5934995B2 JPS5934995B2 JP52084227A JP8422777A JPS5934995B2 JP S5934995 B2 JPS5934995 B2 JP S5934995B2 JP 52084227 A JP52084227 A JP 52084227A JP 8422777 A JP8422777 A JP 8422777A JP S5934995 B2 JPS5934995 B2 JP S5934995B2
- Authority
- JP
- Japan
- Prior art keywords
- alkali metal
- radioactive
- metal removal
- coolant
- radioactive alkali
- 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
Links
- 229910052783 alkali metal Inorganic materials 0.000 title claims description 25
- 150000001340 alkali metals Chemical class 0.000 title claims description 25
- 230000002285 radioactive effect Effects 0.000 title claims description 20
- 238000011084 recovery Methods 0.000 title claims description 14
- 239000002826 coolant Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 14
- 238000000746 purification Methods 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 230000002378 acidificating effect Effects 0.000 claims description 5
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 2
- -1 phosphoric acid compound Chemical class 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 21
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- NRGIRRZWCDKDMV-UHFFFAOYSA-H cadmium(2+);diphosphate Chemical compound [Cd+2].[Cd+2].[Cd+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O NRGIRRZWCDKDMV-UHFFFAOYSA-H 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- FJOLTQXXWSRAIX-UHFFFAOYSA-K silver phosphate Chemical compound [Ag+].[Ag+].[Ag+].[O-]P([O-])([O-])=O FJOLTQXXWSRAIX-UHFFFAOYSA-K 0.000 description 1
- 229910000161 silver phosphate Inorganic materials 0.000 description 1
- 229940019931 silver phosphate Drugs 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Description
【発明の詳細な説明】
本発明は放射性アルカリ金属除去回収装置に関し、特に
液体金属冷却原子炉の冷却材カバーガス浄化系に設けら
れる放射性アルカリ金属除去回収装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a radioactive alkali metal removal and recovery apparatus, and more particularly to a radioactive alkali metal removal and recovery apparatus installed in a coolant cover gas purification system of a liquid metal cooled nuclear reactor.
液体金属冷却原子炉の冷却材カバーガスとしては、一般
にアルゴンあるいはヘリウム等の不活性ガスが用いられ
る。An inert gas such as argon or helium is generally used as a coolant cover gas for a liquid metal cooled nuclear reactor.
冷却材はかなりの高温であるため、揮発性の放射性アル
カリ金属核分裂生成物（ＣＳ １３７ ｔ ＣＳ
１３４等）や、放射化した冷却材自体（Ｎａ−２４、Ｎ
ａ−２２等）が蒸発して、冷却材からカバーガス相に移
行する。Because the coolant is at a fairly high temperature, it contains volatile radioactive alkali metal fission products (CS 137 t CS
134, etc.) and the radioactive coolant itself (Na-24, N
a-22, etc.) evaporates and passes from the coolant to the cover gas phase.
カバーガスは希ガス回収処理系等を通されて、その中に
含まれる放射性元素が可能な限り多く除去され、最終的
にはスタックから周囲環境に放出される。The cover gas is passed through a rare gas recovery treatment system or the like to remove as much of the radioactive elements contained therein as possible, and is ultimately released from the stack into the surrounding environment.
アルカリ金属蒸気を冷却材カバーガスから除去する装置
としては、従来、一般にステンレス鋼メツシュを充填し
たフィルター即ちペーパートラップを用いている。Conventional devices for removing alkali metal vapors from coolant cover gases typically employ filters or paper traps filled with stainless steel mesh.
しかしながら、このようなステンレス鋼メツシュのフィ
ルターは、比較的口の粗いふるいにしか過ぎず、成る程
度の凝結捕集効果はあるが、原子炉内で生成されて冷却
材中に混入し、さらにここからカバーガスに蒸発移行し
た揮発性の高い放射性アルカリ金属に対しては充分に効
果的でなく、光分な捕集ができずに炉外に放出される危
険がある。However, such stainless steel mesh filters are nothing more than relatively coarse sieves, and although they have a certain effect of collecting condensation, they also collect condensation generated in the reactor and mixed into the coolant. It is not sufficiently effective against highly volatile radioactive alkali metals that have evaporated into the cover gas, and there is a risk that they will be emitted outside the reactor without being able to collect the light.
このような放射性アルカリ金属には、半減期の長いＣ−
１３７，Ｃ８−１３４゜Ｎａ−２２等が含まれており、
環境保全および安全性の立場から、このようなアルカリ
金属放射性物質を除去回収できる装置の早急な開発が望
まれている。Such radioactive alkali metals include C-
Contains 137, C8-134°Na-22, etc.
From the standpoint of environmental protection and safety, there is an urgent need for the development of a device that can remove and recover such alkali metal radioactive materials.
従って本発明の目的は、原子炉冷却材のカバーガス浄化
系に設けられて、カバーガス中に蒸気あるいは酸化物粒
子として混入している放射性アルカリ金属を除去回収す
る、熱的および化学的に安定で、効率が良く、構成の簡
単な放射性アルカリ金属除去回収装置を提供することで
ある。Therefore, it is an object of the present invention to provide a thermally and chemically stable system for removing and recovering radioactive alkali metals mixed in the cover gas as steam or oxide particles, which is installed in a cover gas purification system for a nuclear reactor coolant. An object of the present invention is to provide a radioactive alkali metal removal and recovery device that is efficient and has a simple configuration.
次に添附図面に示す本発明の一実施例に沿って本発明を
説明する。Next, the present invention will be explained along with an embodiment of the present invention shown in the accompanying drawings.
図には液体金属冷却原子炉に本発明の放射性アルカリ金
属除去回収装置１を使用した状態を概略的に示しである
。The figure schematically shows the state in which the radioactive alkali metal removal and recovery apparatus 1 of the present invention is used in a liquid metal cooled nuclear reactor.
ナトリウム等の冷却材２を収容する適当な冷却材格納機
器３内には所定のレベル４まで冷却材２が収容されてい
る。A suitable coolant storage device 3 containing a coolant 2, such as sodium, contains the coolant 2 up to a predetermined level 4.
レベル４の上方の冷却材格納機器３内の空間には、冷却
材２のレベルおよび化学的純度を維持するためにアルゴ
ン、ヘリウム等の不活性ガスのカバーガス５が充填され
ている。The space in the coolant containment device 3 above the level 4 is filled with a cover gas 5 of an inert gas such as argon, helium, etc. to maintain the level and chemical purity of the coolant 2.
このカバーガス５中には、原子炉内で生成して冷却材中
に混入して来た放射性アルカリ金属が蒸発移行して存在
している。In this cover gas 5, radioactive alkali metals generated in the nuclear reactor and mixed into the coolant are evaporated and transferred.
カバーガス５のガス圧調整のためカバーガスの給気、排
気は配管６を通しておこないまたその排気ラインにはカ
バーガス浄化系（希ガス放射能回収装置）が設けられて
いる。In order to adjust the gas pressure of the cover gas 5, the cover gas is supplied and exhausted through a pipe 6, and a cover gas purification system (rare gas radioactivity recovery device) is provided in the exhaust line.
この配管６に、カバーガス浄化系の一部として、ペーパ
ートラップである放射性アルカリ金属除去回収装置１が
接続されているのである。A radioactive alkali metal removal and recovery device 1, which is a paper trap, is connected to this pipe 6 as part of a cover gas purification system.
放射性アルカリ金属除去回収装置１は、両端で配管６に
接続された略々中空円筒形のハウジング７を備えている
。The radioactive alkali metal removal and recovery apparatus 1 includes a substantially hollow cylindrical housing 7 connected to piping 6 at both ends.
ハウジング７の内部で各端近くには、端板から離れたト
ラップ材支持体８が設けられている。Inside the housing 7 and near each end there is a trap material support 8 spaced from the end plate.
この支持体８は、例えば多数の開口９を有していてカバ
ーガス５が通過できるが、後に説明するトラップ材を所
定位置に支持するものである。This support 8 has, for example, a large number of openings 9 through which the cover gas 5 can pass, and supports a trapping material, which will be described later, in a predetermined position.
２枚の支持体８の間にはトラップ材１０が充填さえてい
る。A trap material 10 is filled between the two supports 8.
トラップ材１０の材料は、シリカ（Ｓ １０２）、り０
フイト（Ｃｒ２０３）あるいはペーパートラップの使用
温度（約５５０°Ｃ）に耐える耐熱性があり、ナトリウ
ム蒸気と化合し易いリン酸化合物の少なくとも一つを主
成分とする酸性酸化物である。The material of the trap material 10 is silica (S102),
It is an acidic oxide that is heat resistant enough to withstand the operating temperature (approximately 550°C) of Fite (Cr203) or paper traps, and whose main component is at least one phosphoric acid compound that easily combines with sodium vapor.
リン酸化合物はリン酸アルミニウム、リン酸銀およびリ
ン酸カドミウムである。Phosphate compounds are aluminum phosphate, silver phosphate and cadmium phosphate.
これらの酸性酸化物は熱的および化学的に非常に安定で
あるが、アルカリ金属およびその酸化物とは化合して、
ケイ酸塩、クロム酸塩、リン酸塩等の安定な化合物を生
成する。These acidic oxides are thermally and chemically very stable, but when combined with alkali metals and their oxides,
Produces stable compounds such as silicates, chromates, and phosphates.
この反応は急激な反応ではなく、比較的大量のアルカリ
金属蒸気と接しても危険は無い。This reaction is not rapid, and there is no danger even if it comes into contact with a relatively large amount of alkali metal vapor.
また、アルカリ金属蒸気と接して直ちに上述の化合物を
作らない場合でも、アルカリ金属蒸気は大きな吸着力に
より上述の酸性酸化物に吸着される。Moreover, even when the above-mentioned compounds are not immediately produced in contact with the alkali metal vapor, the alkali metal vapor is adsorbed by the above-mentioned acidic oxide due to its large adsorption power.
このような酸性酸化物材料はフィルターとして適当な任
意の形状に形成され、トラップ材１０として支持体９に
よりハウジングγ内に支持されている。Such an acidic oxide material is formed into any shape suitable for a filter, and is supported within the housing γ by a support 9 as a trap material 10.
フィルターとして適当な形状は、例えば密に充填された
繊維状あるいはウール状もしくは多孔質焼結体である。Suitable shapes for filters are, for example, densely packed fibrous or woolly or porous sintered bodies.
このようなトラップ材１０を備えたアルカリ金属除去回
収装置１を、冷却材カバーガス浄化系中のフィルターと
して用いれば、カバーガス中の放射性あるいは非放射性
のアルカリ金属およびその酸化物の蒸気およびその微粒
子が極めて効率良く除去回収できる。If the alkali metal removal and recovery device 1 equipped with such a trap material 10 is used as a filter in a coolant cover gas purification system, radioactive or non-radioactive alkali metals and their oxide vapors and their fine particles in the cover gas can be removed. can be removed and recovered extremely efficiently.
またトラップ材１０は熱的および化学的に安定であり、
装置の構造が簡単であるので、製作、保守が容易である
。Further, the trap material 10 is thermally and chemically stable,
Since the device has a simple structure, it is easy to manufacture and maintain.
更にトラップ材に補集されたアルカリ金属は安定な化合
物になるなどして強固にトラップ材と結合しているので
捕集後の廃棄処理が容易で安全におこなえる。Furthermore, since the alkali metals collected by the trapping material become stable compounds and are strongly bonded to the trapping material, disposal after collection can be easily and safely performed.
図は冷却材カバーガス浄化系として設けられた本発明の
放射性アルカリ金属除去回収装置を示す概略図である。
１・・・・・・放射性アルカリ金属除去回収装置、７・
・・・・・ハウジング、８・・・・・・支持体、１０・
・・・・・トラップ材。The figure is a schematic diagram showing a radioactive alkali metal removal and recovery apparatus of the present invention provided as a coolant cover gas purification system. 1...Radioactive alkali metal removal and recovery equipment, 7.
...Housing, 8...Support, 10.
...Trap material.
Claims (1)
ーパトラップとして設けられ、シリカ、クロマイトおよ
びリン酸化合物のうち少くとも一つを成分とする酸性酸
化物のトラップ材を備えた放射性アルカリ金属除去回収
装置。 ２ 上記トラップ材が、繊維状、ウール状あるいは多孔
質焼結体である特許請求の範囲第１項記載の放射性アル
カリ金属除去回収装置。[Scope of Claims] 1. A vapor trap provided as a vapor trap in a coolant cover gas purification system of a liquid metal cooled nuclear reactor, comprising an acidic oxide trap material containing at least one of silica, chromite, and a phosphoric acid compound. Radioactive alkali metal removal and recovery equipment. 2. The radioactive alkali metal removal and recovery device according to claim 1, wherein the trap material is fibrous, wool-like, or porous sintered body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52084227A JPS5934995B2 (en) | 1977-07-15 | 1977-07-15 | Radioactive alkali metal removal and recovery equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52084227A JPS5934995B2 (en) | 1977-07-15 | 1977-07-15 | Radioactive alkali metal removal and recovery equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5420299A JPS5420299A (en) | 1979-02-15 |
| JPS5934995B2 true JPS5934995B2 (en) | 1984-08-25 |
Family
ID=13824580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52084227A Expired JPS5934995B2 (en) | 1977-07-15 | 1977-07-15 | Radioactive alkali metal removal and recovery equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5934995B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07241799A (en) * | 1994-03-03 | 1995-09-19 | Daiei Kikai Sangyo Kk | Cutting edge position changing device in slitter |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2933227B1 (en) * | 2008-06-25 | 2010-07-30 | Commissariat Energie Atomique | PROCESS FOR TREATING A STRUCTURE CONTAINING SODIUM AND A RADIOACTIVE MATERIAL |
-
1977
- 1977-07-15 JP JP52084227A patent/JPS5934995B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07241799A (en) * | 1994-03-03 | 1995-09-19 | Daiei Kikai Sangyo Kk | Cutting edge position changing device in slitter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5420299A (en) | 1979-02-15 |
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