JP2930644B2 - Device for reducing internal pressure in containers with radioactive waste - Google Patents
Device for reducing internal pressure in containers with radioactive wasteInfo
- Publication number
- JP2930644B2 JP2930644B2 JP2028607A JP2860790A JP2930644B2 JP 2930644 B2 JP2930644 B2 JP 2930644B2 JP 2028607 A JP2028607 A JP 2028607A JP 2860790 A JP2860790 A JP 2860790A JP 2930644 B2 JP2930644 B2 JP 2930644B2
- Authority
- JP
- Japan
- Prior art keywords
- container
- pot
- permeable
- catalyst
- opening
- 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
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F5/00—Transportable or portable shielded containers
- G21F5/06—Details of, or accessories to, the containers
- G21F5/12—Closures for containers; Sealing arrangements
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F5/00—Transportable or portable shielded containers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Catalysts (AREA)
- Processing Of Solid Wastes (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、放射性廃棄物を有する容器に付いている、
廃棄物中で生じる水素による内部圧力を低下させ、この
容器からの水素放出を低減させるための装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a container having radioactive waste,
The present invention relates to an apparatus for reducing internal pressure due to hydrogen generated in waste and reducing hydrogen release from the container.
多くの、弱く、かつ中程度の放射性廃棄物充填ドラム
（Abfallgebinde）においては、原則的に、ガス、殊に
水素の形成が、１方で、金属成分と水との反応に基づ
き、他方では、セメント／ビチユメンマトリックス材料
からの放射線分解ガスの形成によつても可能である。こ
の第１の形成機構は、殊に、高圧圧縮された混合廃棄物
の場合に重要である。中間−及び最終貯蔵のために、１
容器及び単位時間当りのこの形成−／放出割合は、容器
を最終貯蔵可能と表記することができるように、制限さ
れている。In many weak and moderate radioactive waste-filled drums (Abfallgebinde), the formation of gases, in particular hydrogen, is in principle based, on the one hand, on the reaction of metal components with water, on the other hand, It is also possible by the formation of radiolysis gas from cement / bitumen matrix material. This first forming mechanism is particularly important in the case of high-pressure compressed mixed waste. For intermediate and final storage, 1
This rate of formation / release per container and per unit time is limited so that the container can be labeled as end-of-life.
従来公知の問題解決法は、比放射能の制限もしくは、
圧縮された混合廃棄物の場合には、粗製廃棄物の注意深
い選別もしくは、むしろ時間のかかる、従つて非常に経
費のかかる真空乾燥が提案されている。Previously known solutions include limiting the specific activity or
In the case of compressed mixed wastes, a careful separation of the crude waste or rather a time-consuming and therefore very expensive vacuum drying has been proposed.
完全に水を避けるべき容器内に導入される廃棄物の完
全な選別は、工業的には不可能であり、即ち、水分排除
は原則的には成功していない。従つて、多くの重要な金
属例えば鉄ベース合金と水との反応は、すべての当該温
度−及び圧力条件下で熱力学的に可能であり、例えばい
わゆるシツコル−反応（Schikorr−Reaktion）が起こ
る： 3Fe＋4H2O＝Fe3O4＋4H2 容器内容物の乾燥、例えば真空乾燥は、数日の長い乾
燥時間に基づき、高い処理量に対しては、非常に経費が
かかる。それというのも、このためには非常に高価な装
置が必要になるからである。Complete sorting of the waste introduced into the container, which should completely avoid water, is not industrially possible, i.e., water elimination is in principle not successful. Thus, the reaction of many important metals, such as iron-based alloys, with water is thermodynamically possible under all such temperature and pressure conditions, for example the so-called Schikorr-Reaktion takes place: drying of 3Fe + 4H 2 O = Fe 3 O 4 + 4H 2 container contents, such as vacuum drying, on the basis of the long drying times of a few days, for high throughput, very costly. This requires very expensive equipment.
ところで、本発明の課題は、１方では、容器もしくは
充填ドラム内の水素により生じる過圧を低下させ、もし
くはゼロに戻すが、その際、水素放出速度を同時に著る
しく低めることでもある。しかしながら、この課題設定
に対する限界条件は、検査−及び容器技術の水準を僅か
に変えること、即ち、この最終貯蔵の工業的実施例をで
きるだけ広範に使用できるようにすることである。By the way, an object of the present invention is to reduce or return the overpressure generated by hydrogen in a container or a filling drum to zero, and at the same time, to significantly reduce the hydrogen release rate at the same time. However, the limiting condition for this task setting is to slightly change the state of the art of inspection and container technology, i.e. to make the industrial embodiment of this final storage as widely as possible.
この課題の解決のために、本発明は、先に記載の種類
の装置に、容器の又はその蓋の壁の透過性開口部内に、
貯蔵温度で所定の流量割合で、容器内部から外側へ出る
水素を空気からの酸素で酸化して水にする溶媒を収容す
ることを提案とする。In order to solve this problem, the present invention relates to a device of the type described above, comprising a permeable opening in the container or in the lid wall thereof,
It is proposed to contain a solvent that oxidizes hydrogen that exits from the inside of the container to the outside with oxygen from the air into water at a predetermined flow rate at the storage temperature.
この触媒配置の特に有利な構成は、特許請求項第２項
及び第３項の特徴部分に記載されている特徴から知るこ
とができる。Particularly advantageous configurations of this catalyst arrangement can be seen from the features described in the characterizing part of claims 2 and 3.
次に、本発明の詳細を添付図面につき詳説する： 第１図によれば、この装置は、主として鉢形のポツト
もしくは容器１より成り、これは、容器壁の開口部２内
に、放射性廃棄物の最終貯蔵キヤスクの蓋３内に組込ま
れている。このために、開口部２には、中から連結リン
グ４が熔接されていて、この中に、ポツト１が外からそ
の外側連結部５によりねじ込まれている。ポツト１と蓋
３との間の面の密封は、その間にあるパツキン６により
行なう。The details of the invention will now be described in more detail with reference to the accompanying drawings: According to FIG. 1, the device consists mainly of a pot-shaped pot or container 1, which contains radioactive waste in an opening 2 in the container wall. Of the final storage cask. For this purpose, a connecting ring 4 is welded from the inside to the opening 2, into which the pot 1 is screwed from the outside by an outer connecting part 5. The surface between the pot 1 and the lid 3 is sealed by a packing 6 therebetween.
中に触媒もしくは触媒パツク７が挿入されているポツ
ト１の内部は、キヤスク内部９への連結開口部８を有
し、その中に、ガス透過性の焼結金属キヤンドル10が組
込まれている。外部12に対して、触媒７は、金網、水蒸
気透過性プレート11又は焼結金属蓋により被われてい
る。The interior of the pot 1, in which the catalyst or catalyst pack 7 is inserted, has a connection opening 8 to the interior 9 of the casing, in which a gas-permeable sintered metal candle 10 is incorporated. For the exterior 12, the catalyst 7 is covered by a wire mesh, a water vapor permeable plate 11 or a sintered metal lid.
この構造は、この容器もしくは図示されていない廃棄
物キヤスクからのガスの逃出を可能にする。容器内で生
じた水素は、開口部８及び焼結金属キヤンドル10を通
り、触媒７を通つて導びかれ、ここで、外気温度で、水
素が外気の酸素で酸化されて水になる。触媒としては、
不活性担体上の貴金属例えば酸化アルミニウム上のパラ
ジウムの系が使用される。実験的に、Al2O3−担体マト
リツクス上にパラジウム0.5重量％を有するパラジウム
触媒（Katalysator E 221 P/D−0.5％Pd）が好適である
ことが立証された。This arrangement allows the escape of gas from this container or a waste mask not shown. The hydrogen produced in the vessel passes through the opening 8 and the sintered metal candle 10 and is guided through the catalyst 7, where at ambient temperature, the hydrogen is oxidized by the oxygen of the ambient to water. As a catalyst,
A system of noble metals on an inert support, for example palladium on aluminum oxide, is used. Experimentally, Al 2 O 3 - palladium catalyst having 0.5 wt% palladium on the support the matrix (Katalysator E 221 P / D- 0.5% Pd) that is suitable was verified.
容器外での酸化により、水素の酸化生成物即ち水は、
新たな反応から排除される。この触媒は、いずれにせよ
空気中に存在する酸素と結合して、他の成分との反応に
より更に容易に消耗され、従つて、H2−酸化のためには
もはや提供されない高価な酸化剤の添加を回避する。Due to the oxidation outside the vessel, the oxidation product of hydrogen, i.e., water,
Excluded from new reactions. The catalyst is combined with oxygen present in the air anyway, be more readily consumed by reaction with other components, sub connexion, H 2 - of no longer provided for the oxidation expensive oxidant Avoid addition.
この新規装置は、容易に構成もしくは存在するコンテ
ナ−及びキヤスク系に統合することができ、これは、殊
にそのコンパクトな構造により好適である。The new device can be easily integrated into existing or existing container and mask systems, which is particularly suitable for its compact construction.
第１図は本発明の装置を示す図である。 １……ポツト、２……開口部、３……容器蓋、４……連
結リング、５……外部連結部、６……パツキン、７……
触媒パツク、８……連結開口部、９……容器内部、10…
…焼結金属キヤンドル、11……透過性プレート、12……
外部FIG. 1 is a view showing an apparatus of the present invention. DESCRIPTION OF SYMBOLS 1 ... Pot, 2 ... Opening part, 3 ... Container lid, 4 ... Connection ring, 5 ... External connection part, 6 ... Packing, 7 ...
Catalyst pack, 8 ... Connection opening, 9 ... Inside container, 10 ...
… Sintered metal canddle, 11 …… Transparent plate, 12 ……
Outside
───────────────────────────────────────────────────── フロントページの続き (72)発明者 ヴオルフラム・プフアイフアー ドイツ連邦共和国ヴアインガルテン・ブ ルグンダーヴエーク ４ (72)発明者 ヴイルヘルム・ヘンペルマン ドイツ連邦共和国エツゲンシユタイン- ２・モーゼルシユトラーセ ４ (58)調査した分野(Int.Cl.6，ＤＢ名) G21F 9/36 G21F 5/00 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Vuolfram Phufaiahr Weingarten-Brugunderweg 4 Germany (72) Inventor Weilhelm Hempermann Etzgenjuyutin, Germany 2-Moselshutraße 4 (58) Field surveyed (Int. Cl. 6 , DB name) G21F 9/36 G21F 5/00
Claims (3)
廃棄物中で生じる水素による内部圧力を低下させ、容器
からの水素放出を低減させるための装置において、この
容器蓋の外から密封された開口部（２）中にねじ込まれ
た又はねじ締められた鉢形ポット（１）の壁、透過性開
口部（８）のガス透過性燒結金属キャンドル（10）及び
透過性プレート（11）で囲まれた空間の中に、貯蔵温度
で所定の流量割合で、容器内部から外側へ出る水素を酸
素で酸化して水にする触媒が収容されていることを特徴
とする、放射性廃棄物を有する容器に付いている内部圧
力を低下させる装置。1. A container having radioactive waste,
In a device for reducing internal pressure due to hydrogen generated in waste and reducing hydrogen release from a container, the container lid is screwed or screwed into the sealed opening (2) from outside. In the space surrounded by the wall of the pot-shaped pot (1), the gas-permeable sintered metal candle (10) of the permeable opening (8) and the permeable plate (11), at a predetermined flow rate at the storage temperature, An apparatus for lowering the internal pressure of a container having radioactive waste, which contains a catalyst for oxidizing hydrogen that escapes from the inside of the container to the outside with oxygen to form water.
口部（２）にねじ込まれた又はねじ締められた鉢型のポ
ット（１）中に存在し、 ｂ）ポット（１）の容器内部（９）に向いている底部は
透過性開口部（８）を有し、 ｃ）透過性開口部（８）内にガス透過性の焼結金属キャ
ンドル（10）が装入設置されており、 ｄ）触媒パック（７）は、ポット（１）内の焼結金属キ
ャンドル（10）と反対側で、金網又は水蒸気透過性の焼
結金属板（11）で被われている、請求項１記載の装置。2. Features: a) A catalyst pack (7) is present in a pot-shaped pot (1) screwed or screwed into the opening (2) of the externally sealed container lid. B) the bottom of the pot (1) facing the interior (9) of the vessel has a permeable opening (8); c) a gas permeable sintered metal candle in the permeable opening (8). (10) is charged and installed. D) The catalyst pack (7) is placed on the opposite side of the sintered metal candle (10) in the pot (1) to a wire mesh or a water vapor permeable sintered metal plate (11). 2. The device of claim 1, wherein the device is covered by:
ラジウム0.5重量％を有するパラジウム触媒である、請
求項１に記載の装置。3. The apparatus according to claim 1, wherein the catalyst is a palladium catalyst having 0.5% by weight of palladium on an Al 2 O 3 -support matrix.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3904149A DE3904149C2 (en) | 1989-02-11 | 1989-02-11 | Device on containers with radioactive waste to reduce the internal pressure due to hydrogen formation |
| DE3904149.2 | 1989-02-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03200000A JPH03200000A (en) | 1991-08-30 |
| JP2930644B2 true JP2930644B2 (en) | 1999-08-03 |
Family
ID=6373903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2028607A Expired - Lifetime JP2930644B2 (en) | 1989-02-11 | 1990-02-09 | Device for reducing internal pressure in containers with radioactive waste |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0383153B1 (en) |
| JP (1) | JP2930644B2 (en) |
| KR (1) | KR930001952B1 (en) |
| DE (1) | DE3904149C2 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8901738D0 (en) * | 1989-01-26 | 1989-03-15 | Atomic Energy Authority Uk | Recombination catalyst |
| DE4343500A1 (en) * | 1993-12-20 | 1995-06-22 | Forschungszentrum Juelich Gmbh | Device for avoiding overpressures in storage containers with hydrogen-developing content |
| DE19531498C2 (en) * | 1995-08-26 | 2001-06-13 | Nuklear Service Gmbh Gns | Metal drum, in particular steel drum, for radioactive waste with pressure relief devices |
| DE19733283C2 (en) * | 1997-08-01 | 1999-08-05 | Gnb Gmbh | Shielding container for the transport and / or storage of spent fuel elements |
| JP4615749B2 (en) * | 2001-03-22 | 2011-01-19 | 日揮株式会社 | Radioactive waste treatment method and apparatus |
| FR2874120B1 (en) | 2004-08-09 | 2006-11-24 | Cogema Logistics Sa | METHOD AND DEVICE FOR REMOVING FLAMMABLE GASES IN A CLOSED ENCLOSURE AND ENCLOSURE EQUIPPED WITH SUCH A DEVICE |
| FR2925752B1 (en) * | 2007-12-21 | 2012-03-09 | Tn Int | DEVICE FOR TRANSPORTING AND / OR STORING RADIOACTIVE MATERIALS TO ENABLE CONTROLLED RELEASE OF OXYGEN IN A CLOSED ENCLOSURE |
| FR2971614A1 (en) * | 2011-02-11 | 2012-08-17 | Tn Int | DEVICE FOR TRAPPING FLAMMABLE GASES PRODUCED BY RADIOLYSIS OR THERMOLYSIS IN A CONTAINMENT ENCLOSURE |
| JP6242263B2 (en) * | 2014-03-27 | 2017-12-06 | 日立Ｇｅニュークリア・エナジー株式会社 | Radioactive material storage container |
| JP6746922B2 (en) * | 2016-01-20 | 2020-08-26 | 株式会社Ihi | Method and device for storing radioactive waste |
| WO2023022782A1 (en) | 2021-08-19 | 2023-02-23 | Battelle Savannah River Alliance, Llc | Compact augmented permeation system (caps) assemblies and related systems and methods |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD34878A (en) * | ||||
| US2847284A (en) * | 1955-03-10 | 1958-08-12 | Harold M Busey | Apparatus for catalytically combining gases |
| US3369121A (en) * | 1966-04-06 | 1968-02-13 | Squibb & Sons Inc | Radioactive package and container therefor |
| US3755075A (en) * | 1970-03-25 | 1973-08-28 | North American Rockwell | Condenser-type gas combiner |
| DE2922717C2 (en) * | 1979-06-05 | 1983-01-27 | Brown Boveri Reaktor GmbH, 6800 Mannheim | Process and device for the catalytic recombination of hydrogen that is enclosed in the containment of a nuclear reactor plant |
| DE3227512C2 (en) * | 1982-07-23 | 1996-03-28 | Nuklear Service Gmbh Gns | Lost shielding container for radioactive waste |
| JPS62265600A (en) * | 1986-05-12 | 1987-11-18 | 秩父セメント株式会社 | Pressure regulator for storage-transport-disposal vessel |
| DE3730743A1 (en) * | 1987-09-12 | 1989-03-30 | Nuklear Service Gmbh Gns | Method for reducing the internal pressure build-up in a storage container for radioactive wastes |
-
1989
- 1989-02-11 DE DE3904149A patent/DE3904149C2/en not_active Expired - Fee Related
-
1990
- 1990-02-06 EP EP90102291A patent/EP0383153B1/en not_active Expired - Lifetime
- 1990-02-07 KR KR1019900001477A patent/KR930001952B1/en not_active Expired - Fee Related
- 1990-02-09 JP JP2028607A patent/JP2930644B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| KR900013526A (en) | 1990-09-06 |
| KR930001952B1 (en) | 1993-03-20 |
| DE3904149C2 (en) | 1994-01-20 |
| DE3904149A1 (en) | 1990-08-23 |
| EP0383153A1 (en) | 1990-08-22 |
| JPH03200000A (en) | 1991-08-30 |
| EP0383153B1 (en) | 1994-02-23 |
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