JPS5913998A - Spent fuel transporting cask having function of decontaminating cask innerface - Google Patents
Spent fuel transporting cask having function of decontaminating cask innerfaceInfo
- Publication number
- JPS5913998A JPS5913998A JP57123800A JP12380082A JPS5913998A JP S5913998 A JPS5913998 A JP S5913998A JP 57123800 A JP57123800 A JP 57123800A JP 12380082 A JP12380082 A JP 12380082A JP S5913998 A JPS5913998 A JP S5913998A
- Authority
- JP
- Japan
- Prior art keywords
- cask
- canister
- cask body
- spent fuel
- fuel
- 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.)
- Pending
Links
Landscapes
- Solid Fuels And Fuel-Associated Substances (AREA)
- Packages (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明はキャスク内面防染機能を有する使用済燃料集合
体器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spent fuel assembly having a cask inner surface protection function.
使用済燃料輸送容器は次のようにして用いられる。The spent fuel transport container is used as follows.
（ａ）原子力発電所の使用済燃料貯蔵プール内で使用済
燃料を収容する。(a) Storing spent fuel in a spent fuel storage pool at a nuclear power plant.
（ｂ）キャスク本体外表面を除染する。(b) Decontaminate the outer surface of the cask body.
（ｃ）再処理工場へ輸送する。(c) Transport to a reprocessing plant.
（ｄ）再処理工場においてキャスク本体内の水を１１水
と置換し、浄化する。(d) At the reprocessing plant, the water in the cask body is replaced with 11 water and purified.
（ｅ）ｍ籾取出プール内でキャスク本体から燃料を取出
す。(e) Remove fuel from the cask body in the paddy removal pool.
（ｆ）空キャスク本体の内部および外表面を除染する。(f) Decontaminate the interior and exterior surfaces of the empty cask body.
（ｇ）空キャスク本体を原子力発電所に輸送する。(g) Transport the empty cask body to the nuclear power plant.
上記手順において、従来、キャスク本体の内外表面は、
上記（ａ）の操作で、放射性物質を含むプール水により
汚染され、まＴコ輸送中にも使用済燃料集合体から剥離
する放射性物質でキャスク本体内面を汚染され、さらに
（ｅ）の操作で、放射性物質を含ムプール水により主と
してキャスク本体の外表面を汚染される。しｔコがって
従来、上記（ｂ） （ｄ） （ｆ）項のような除染の１
こめの操作が必要となってい１こ。In the above procedure, conventionally, the inner and outer surfaces of the cask body are
In operation (a) above, the cask body is contaminated with pool water containing radioactive substances, and the inner surface of the cask body is contaminated with radioactive substances that separate from spent fuel assemblies during transport, and furthermore, in operation (e), The outer surface of the cask body is mainly contaminated by the pool water containing radioactive materials. Therefore, in the past, decontamination procedures such as those described in (b), (d), and (f) above have been carried out.
One operation is required.
そこで本発明はかかる問題点を解消しｔこキャスク内面
防染機能を有する使用済燃料輸送容器を提供するもので
あって、その特徴とするところは、予め清浄水を注入し
たキャスク本体内にキャニスタ本体を挿入すると共に該
キャニスタ本体の上端細部をその鍔部下面のシール材を
介してキャスク本体内面の上端棚部に載置し、キャスク
本体の側壁に、キャスク本体内のキャニスタ本体より上
方の上部キャビティに連通ずる汚染水排出口と、キャス
ク本体内面とキャニスタ本体外面との間の下部キャビテ
ィの上部に連通ずる清浄水排出口と、下部キャビティの
下部に連通ずるドレン排出口とを形成し１こことにあシ
、この構成にぼれば、キャスク本体の内面が汚染されず
、前記（ｄ）の再処理工場におけるキャスク本体内の水
を清浄水と置換し浄化する作業を省略することができ、
まｒ：（ｆ）の燃料を取外しｔこ空のキャスク本体の内
面の除染作業を省略することができるものである。ま１
こ（ｅ）燃料取出し作業において、キャニスタ本体ごと
キャスク本体から一括して使用済燃料を取出すことによ
り燃料プールが、ひいては燃料貯蔵プールが放射性物′
Ｕにより汚染されるおそれがなｌ／−１，このことによ
り派生的に（ｆ）の作業のうち、キャスク本体外表面の
除染作業が単純化される。Therefore, the present invention solves such problems and provides a spent fuel transport container having a cask inner surface anti-staining function. While inserting the main body, place the upper end part of the canister main body on the upper end shelf part of the inner surface of the cask main body through the sealing material on the lower surface of the flange, and place the upper part above the canister main body inside the cask main body on the side wall of the cask main body. A contaminated water outlet communicating with the cavity, a clean water outlet communicating with the upper part of the lower cavity between the inner surface of the cask body and the outer surface of the canister body, and a drain outlet communicating with the lower part of the lower cavity are formed. Furthermore, with this configuration, the inner surface of the cask body is not contaminated, and the work of purifying the cask body by replacing the water inside the cask body with clean water at the reprocessing plant described in (d) above can be omitted.
(f) It is possible to omit the decontamination work of the inner surface of the empty cask body by removing the fuel. M1
In this (e) fuel removal work, by removing the spent fuel from the cask body together with the canister body, the fuel pool, and by extension the fuel storage pool, are free from radioactive materials.
Since there is no risk of contamination by U l/-1, this simplifies the decontamination work for the outer surface of the cask body, which is part of the work (f).
以下、本発明の一実施例を図に基づいて説明する。（１
）はキャスク本体、（２）はキャスクｍ、Ｆ３）はキャ
スク本体（１）内に挿入されｔこキャニスタ本体であっ
て、その上端鍔部（８Ａ）はその内部（８Ａ）の下面に
取付ｌｔラレｔこシール材（４）を介してキャスク本体
内面（’ＩＡ）の上端棚部（ＩＢ）に載置されている。Hereinafter, one embodiment of the present invention will be described based on the drawings. (1
) is the cask body, (2) is the cask m, F3) is the canister body inserted into the cask body (1), and its upper end flange (8A) is attached to the lower surface of the inside (8A). It is placed on the upper end shelf (IB) of the inner surface of the cask body ('IA) via the latch sealing material (4).
（５）はキャニスタ本体（３）の上面にボルト（６）止
めされ１コキャニスタＭ、（７）は該キャニスタ蓋（５
）の上面中央に突設されｒこキャニスタ吊手、（８）は
キャスク本体（１）の側壁土部を貫通してキャスク本体
（１）内のキャニスタ本体（３） 、ｒ、 Ｆ）上方の
上部キャビティ（９）に連通ずるベント弁付き汚染水排
出口、 ＱＯはキャスク本体（１）の側壁中央部を貫通
してキャスク本体（１）内のキャスク本体内面（ＩＡ）
とキャニスタ本体（３）の外面との間の下部キャビティ
αυの上部に連通する水位調整弁付き清浄水排出口、＠
はキャスク本体（］）の側壁下部を貫通して下部キャビ
ティ０■の下部に連通するドレン弁付きドレン排出ｌで
ある。上記シール部祠（４）としては、第２図に示す「
＜」の字形のものや第８図に示すＯすＪレグ形のものが
考えられる。(5) is bolted (6) to the upper surface of the canister body (3), and (7) is the canister lid (5).
) is protruding from the center of the upper surface of the canister hanger (8), which penetrates the side wall earth part of the cask body (1) and extends above the canister body (3), r, F) inside the cask body (1). A contaminated water outlet with a vent valve that communicates with the upper cavity (9), QO passes through the center of the side wall of the cask body (1) and connects to the inner surface of the cask body (IA) inside the cask body (1).
A clean water outlet with a water level adjustment valve, which communicates with the upper part of the lower cavity αυ between and the outer surface of the canister body (3), @
is a drain discharge l with a drain valve that passes through the lower part of the side wall of the cask body () and communicates with the lower part of the lower cavity 0. The seal part shrine (4) is shown in Fig. 2.
Possible examples include a <'' shape and an O-J leg shape as shown in FIG.
要は、上部キャビティ（９）内の汚染水が下部キャビテ
ィθυ内に入υ込まず、しかも下部キャビティ（ＩＩ）
内の比較的高圧の空気が上部キャビティ（９）内に逃げ
得るシール部材（４）であればまい。The key is to prevent contaminated water in the upper cavity (9) from entering the lower cavity θυ, and to prevent the contaminated water from entering the lower cavity (II).
Any sealing member (4) may be sufficient as long as it allows the relatively high-pressure air inside to escape into the upper cavity (9).
上記構成において、原子力発電所で使用済燃料を収容す
る場合には、予めキャスク本体（１）内に清浄水を入れ
Ｔこ後、キャニスタ本体（３）をキャスク本体（１）内
に入れる。これによってキャニスタ本体（３）の鍔部（
８Ａ）がシール部材（４）を介してキャスク本体（１）
の上端棚部（ＩＢ）上に載置され、清浄水が充填されて
いる下部キャビティａη内が密閉される。次にキャニス
タ本体（３） （ｄきのキャスク本体（１）を吊シ上げ
て使用済燃料貯蔵プール内に挿入し、キャニスタ本体（
３）内に使用済燃料を収容し、キャニスタ蓋（５）をボ
ルト（６）止めし、キャスク蓋（２）を取付ける。In the above configuration, when storing spent fuel at a nuclear power plant, clean water is first poured into the cask body (1), and then the canister body (3) is placed into the cask body (1). This allows the flange of the canister body (3) to
8A) is attached to the cask body (1) via the sealing member (4).
The inside of the lower cavity aη filled with clean water is sealed. Next, lift the canister body (3) (d) and insert it into the spent fuel storage pool.
3) Store the spent fuel inside, bolt the canister lid (5) with the bolts (6), and attach the cask lid (2).
次にキャスク本体（１）を吊シ上げてプールから出し、
汚染水排出口（８）のベント弁を開放して上部キャビテ
ィ（９）内の汚染水を排出口（８）から排出する。次に
使用済燃料の高熱にょシ下部キャビティθυ内の清浄水
が膨張させられるので、清浄水排出口Ｃ１Ｏの水位調整
弁を開放して下部キャビティ０１）内の上部清浄水を排
出口αＯから排出する１次にキャスク本体（１）の外表
面を除染した後、再処理工場へ輸送し、燃料取出プール
内でキャスク本体（］）内からキャニスタ本体（３）ご
と一括して燃料を取出し、空のキャスク本体（１）の外
表面を除染し、空のキャスク本体（１）を原子力発電所
に輸送すればよい。Next, lift the cask body (1) and remove it from the pool.
The vent valve of the contaminated water outlet (8) is opened and the contaminated water in the upper cavity (9) is discharged from the outlet (8). Next, due to the high temperature of the spent fuel, the clean water in the lower cavity θυ is expanded, so the water level adjustment valve of the clean water outlet C1O is opened and the upper clean water in the lower cavity 01) is discharged from the outlet αO. First, after the outer surface of the cask body (1) is decontaminated, it is transported to a reprocessing plant, and the fuel is extracted from the cask body (]) along with the canister body (3) in a fuel extraction pool. The outer surface of the empty cask body (1) may be decontaminated and the empty cask body (1) may be transported to a nuclear power plant.
上記実施例において汚染水排出口（８）のベント弁。Vent valve of contaminated water outlet (8) in the above embodiment.
清浄水排出口Ｑ１の水位調整弁およびドレン排出口（ロ
）のドレン弁に代えてプラグを用すてもよい。A plug may be used in place of the water level adjustment valve at the clean water outlet Q1 and the drain valve at the drain outlet (b).
以上述べ１こごとく本発明のキャスク内面防染機能を有
する使用済燃料輸送容器によれば、キャスク本体の内面
が汚染されず、従来必要であっｒコ再処理工場における
キャスク本体内の水を清浄水と置換し浄化する作業と、
燃料を取外しＴご空のキャスク本体の内面の除染作業を
省略することができ、まｆ、：燃料取出し作業ｔこおい
て、キャニスタ本体ごとキャスク本体から一括して使用
街燃料を取出すことにより燃料プールが、ひいては燃料
貯蔵プールが放射性物質により汚染されるおそれがない
。As stated above, according to the spent fuel transport container having the cask inner surface anti-staining function of the present invention, the inner surface of the cask body is not contaminated and the water inside the cask body at the reprocessing plant is cleaned, which was previously necessary. Work to purify by replacing with water,
After removing the fuel, the decontamination work on the inner surface of the empty cask body can be omitted.By removing the used fuel from the cask body together with the canister body, the fuel removal work can be done. There is no risk that the fuel pool, and by extension the fuel storage pool, will be contaminated with radioactive materials.
さらに、このことによシ派生的にキャスク本体外表面の
除染作業が単純、化され、コストダウンを図ることがで
きるものである。Furthermore, this simplifies and simplifies the decontamination work on the outer surface of the cask body, thereby reducing costs.
図は本発明の一実施例を示し、第１図は縦断面図、第２
図および第８図はシール部材の具体例を示す縦断面図で
ある。
０）・・・キャスク本体、 （ＩＡ）・・・キャスク本
体内面、（ＩＢ）・・・上端棚部、（３）・・・キャニ
スタ本体、（８Ａ）・・・キャニスタ本体の鍔部、（４
）・・・シール部材、（８）・・・ベント弁付き汚染水
排出口、（９）・・・上部キャビティ、αｑ・・・水位
調整弁付き清浄水排出口、（ＩＩ＞・・・下部キャビテ
ィ、Ｑ■・・・ドレン弁付きドレン排出口代理人 森本
義弘
第１図
りThe figures show one embodiment of the present invention, with Figure 1 being a longitudinal sectional view and Figure 2 being a longitudinal sectional view.
FIG. 8 and FIG. 8 are longitudinal sectional views showing specific examples of the sealing member. 0)... Cask body, (IA)... Inner surface of cask body, (IB)... Top shelf, (3)... Canister body, (8A)... Flange of canister body, ( 4
)... Seal member, (8)... Contaminated water outlet with vent valve, (9)... Upper cavity, αq... Clean water outlet with water level adjustment valve, (II>... Lower part Cavity, Q■... Drain outlet with drain valve agent Yoshihiro Morimoto 1st drawing
Claims (1)
タ本体を挿入すると共に該キャニスタ本体の上端鍔部ｒ
その鍔部下面のシール材を介してキャスク本体内面の上
端棚部に載置し、キャスク本体の側壁に、キャスク本体
内のキャニスタ本体よシ上方の上部キャビティに連通す
る汚染水排出口と、キャスク本体内面とキャニスタ本体
外面との間の下部キャビティの上部に連通する清浄水排
出口と、下部キャビティの下部に連通ずるドレン排出口
とを形成したことを特徴とするキャスク内面防染機能を
有する使用済燃料輸送容器。1. Insert the canister body into the cask body into which clean water has been injected in advance, and insert the upper end flange r of the canister body.
The cask is placed on the upper shelf of the inner surface of the cask body through a sealing material on the lower surface of the brim, and a contaminated water outlet is provided on the side wall of the cask body, which communicates with the upper cavity above the canister body in the cask body. A use having a cask inner surface resisting function, characterized by forming a clean water outlet communicating with the upper part of the lower cavity between the inner surface of the main body and the outer surface of the canister main body, and a drain outlet communicating with the lower part of the lower cavity. fuel transport container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57123800A JPS5913998A (en) | 1982-07-15 | 1982-07-15 | Spent fuel transporting cask having function of decontaminating cask innerface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57123800A JPS5913998A (en) | 1982-07-15 | 1982-07-15 | Spent fuel transporting cask having function of decontaminating cask innerface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5913998A true JPS5913998A (en) | 1984-01-24 |
Family
ID=14869623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57123800A Pending JPS5913998A (en) | 1982-07-15 | 1982-07-15 | Spent fuel transporting cask having function of decontaminating cask innerface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5913998A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007510919A (en) * | 2003-11-03 | 2007-04-26 | コジュマ・ロジスティクス | Apparatus and method for conditioning nuclear fuel assemblies having double confinement barriers |
-
1982
- 1982-07-15 JP JP57123800A patent/JPS5913998A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007510919A (en) * | 2003-11-03 | 2007-04-26 | コジュマ・ロジスティクス | Apparatus and method for conditioning nuclear fuel assemblies having double confinement barriers |
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