JPS6328277B2 - - Google Patents
Info
- Publication number
- JPS6328277B2 JPS6328277B2 JP57109288A JP10928882A JPS6328277B2 JP S6328277 B2 JPS6328277 B2 JP S6328277B2 JP 57109288 A JP57109288 A JP 57109288A JP 10928882 A JP10928882 A JP 10928882A JP S6328277 B2 JPS6328277 B2 JP S6328277B2
- Authority
- JP
- Japan
- Prior art keywords
- burnable poison
- poison
- basket
- rods
- guide
- 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
- 239000002574 poison Substances 0.000 claims description 44
- 231100000614 poison Toxicity 0.000 claims description 44
- 239000000446 fuel Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002915 spent fuel radioactive waste Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel 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
- Y02E30/30—Nuclear fission reactors
Landscapes
- Feeding And Controlling Fuel (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Description
【発明の詳細な説明】
この発明は使用済燃料内挿物の貯蔵スペースを
縮少化する処理方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for processing spent fuel inserts that reduces storage space.
従来、PWR型原子炉で使用した燃料内挿物
（バーナブルポイズン集合体）は、燃料が再処理
工場へ移送される前に取りはずされ、燃料貯蔵ピ
ツトで暫定的に貯蔵されている。その貯蔵形態
は、重量に比べ体積が大きく、貯蔵ピツトの使用
効率を著しく低下させているため、今後さらに貯
蔵量が増大すると思われる現在、各原子力発電所
においては処理方法の確立が急がれている。 Conventionally, fuel inserts (burnable poison aggregates) used in PWR reactors are removed before the fuel is transferred to a reprocessing plant and temporarily stored in fuel storage pits. The storage format has a large volume compared to its weight, which significantly reduces the usage efficiency of storage pits.As the storage amount is expected to increase further in the future, it is urgent for each nuclear power plant to establish a processing method. ing.
この発明はこのような従来の問題の解決のため
になされたものであり、バーナブルポイズン集合
体を保持体とポイズン棒とに分けて収納するよう
にし、これによつてきわめて小さな容積で長期間
にわたつて安全、確実に貯蔵ができるようにした
ものである。すなわち、この発明は、バーナブル
ポイズン集合体のバーナブルポイズン棒をその中
実部で切断し、保持体は第１のバスケツト中に順
次軸方向に重ねて収納し、ポイズン棒はガイド手
段を通過させて整列させると共にローラで挾みつ
けて移送させ、これを第２のバスケツト内に配置
させたガイドチユーブにそれぞれ挿入させるよう
にし、上記各操作を水中で行なわせるようにした
ものである。 This invention was made to solve such conventional problems, and the burnable poison aggregate is stored separately in the holding body and the poison rod, thereby making it possible to store the burnable poison aggregate for a long period of time in an extremely small volume. It is designed to be stored safely and reliably for a long period of time. That is, in this invention, the burnable poison rods of the burnable poison aggregate are cut at their solid parts, the holders are stored in a first basket in a stacked manner in the axial direction, and the poison rods are passed through a guide means. The baskets are arranged in a row, sandwiched between rollers and transported, and then inserted into guide tubes placed in a second basket, so that each of the above operations can be performed underwater.
以下、この発明の実施例を図面によつて説明す
る。バーナブルポイズン集合体１は、第１〜３図
に示すように、保持体２に対してバーナブルポイ
ズン棒３を複数本（図例では４本）取付けると共
にシンブルプラグ４を適宜の本数取付けて構成し
ている。バーナブルポイズン棒３はポイズン体が
ステンレススチール製チユーブ内に挿入されて構
成され、かつ保持体２への取付部付近には中実部
３０が構成されている。集合体全体の寸法は、保
持体２の幅Ｂが、例えば160mm、シンブルプラグ
４を含めた高さL1が270mm、バーナブルポイズン
棒の長さL2が4000mm、太さｄが11mm、程度に構
成されている。 Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, the burnable poison aggregate 1 is constructed by attaching a plurality of burnable poison rods 3 (four in the example) to a holder 2 and attaching an appropriate number of thimble plugs 4. It consists of The burnable poison rod 3 is constructed by inserting a poison body into a stainless steel tube, and has a solid portion 30 near the attachment portion to the holder 2. The dimensions of the entire assembly are, for example, the width B of the holder 2 is 160 mm, the height L 1 including the thimble plug 4 is 270 mm, the length L 2 of the burnable poison rod is 4000 mm, and the thickness d is 11 mm. It is composed of
第４図は、バーナブルポイズン集合体１を原子
炉から取出した後に処理する過程を示し、これら
の操作は燃料貯蔵ピツトの水中において行なわれ
る。炉から取出したバーナブルポイズン集合体１
は、図示しないクレーンで吊つて水中を移動さ
せ、切断位置にセツトする。ついで、第２，３図
に示すように、切断刃５を中心方向に移動させバ
ーナブルポイズン棒３の中実部３０をそれぞれ切
断する。この切断は、切屑が生じないように剪断
による切断を行なう。バーナブルポイズン棒３が
保持体２に12本取付けられているばあいには、上
記切断後、切断刃５をそれぞれバーナブルポイズ
ン棒３ａに近づけて４本のバーナブルポイズン棒
３ａをそれぞれ切断し、ついで同様に４本のバー
ナブルポイズン棒３ｂを切断する。 FIG. 4 shows the process of treating the burnable poison assembly 1 after it is removed from the nuclear reactor, and these operations are carried out underwater in the fuel storage pit. Burnable poison aggregate 1 taken out from the furnace
is lifted by a crane (not shown), moved underwater, and set at the cutting position. Next, as shown in FIGS. 2 and 3, the cutting blade 5 is moved toward the center to cut the solid portion 30 of the burnable poison rod 3, respectively. This cutting is performed by shearing so that no chips are generated. If 12 burnable poison rods 3 are attached to the holder 2, after the above cutting, move the cutting blade 5 close to each of the burnable poison rods 3a to cut each of the four burnable poison rods 3a. Then, the four burnable poison rods 3b are cut in the same manner.
切断されたバーナブルポイズン棒３は先細りの
筒状体からなるガイド６中を落下して一列に整列
され、その下部に形成した開口部から内部に臨ん
でいるローラ７に挾まれて下向きに送られる。ガ
イド６の下方には予め燃料ピツトのラツク内にセ
ツトした第２のバスケツト８が配置され、バスケ
ツト８中には、第５図に示すように、仕切板８１
によつて配列された多数のガイドチユーブ８０が
配置されている。このガイドチユーブ８０はそれ
ぞれバーナブルポイズン棒１本が収納される大き
さに構成され、かつ一度に切断される本数に対応
して４本ずつの群Ａ、Ｂ、Ｃ、Ｄ…に区分されて
いる。また、ガイド６はその上端部を中心に下端
部が揺動可能であり、このガイド６の揺動に連動
してローラ７も移動し、切断されたバーナブルポ
イズン棒３を４本ずつ群Ａ、Ｂ、Ｃ、Ｄ…に順次
挿入させるようにしている。そしてローラ７によ
つてバーナブルポイズン棒３を下向きに送り出す
ことによりガイドチユーブ８０中に押し込む。バ
ーナブルポイズン棒３は細長く、撓みやすいもの
であり、またガイドチユーブ８０はその容積を最
小限にする要求からバーナブルポイズン棒３が挿
入される最小限の内径のものを用いるために上記
ローラ７による押し込みが必要となる。このよう
にしてバーナブルポイズン棒３を予め燃料貯蔵ピ
ツトのラツクにセツトしたバスケツト８中に収納
すると、相互の間隔を非常に小さくして収能でき
るために収納容積を大幅に減少させることができ
る。 The cut burnable poison rods 3 fall through a guide 6 made of a tapered cylindrical body, are aligned in a line, are held by rollers 7 facing inside through an opening formed at the bottom, and are sent downward. It will be done. A second basket 8, which has been set in advance in the rack of the fuel pit, is disposed below the guide 6, and inside the basket 8, as shown in FIG.
A large number of guide tubes 80 are arranged. Each of the guide tubes 80 is configured to have a size that accommodates one burnable poison rod, and is divided into groups A, B, C, D, etc. of four rods each corresponding to the number of rods to be cut at one time. There is. Further, the lower end of the guide 6 can swing around its upper end, and the roller 7 also moves in conjunction with the swinging of the guide 6, and the cut burnable poison rods 3 are placed in groups A of four at a time. , B, C, D, etc., in sequence. Then, the burnable poison rod 3 is sent downward by the roller 7 to be pushed into the guide tube 80. The burnable poison rod 3 is elongated and flexible, and the guide tube 80 has a minimum inner diameter into which the burnable poison rod 3 can be inserted in order to minimize its volume. Pushing is required. In this way, when the burnable poison rods 3 are stored in the basket 8 which has been set in advance in the rack of the fuel storage pit, the storage volume can be greatly reduced because the distance between them can be made very small. .
なお、ガイド６は揺動させる代りに水平移動さ
せるようにしてもよく、そのばあいはガイド６の
上端にバーナブルポイズン棒３の先端部を挿入さ
せておき、あるいは適宜のガイド手段でバーナブ
ルポイズン棒３の下端部がガイド６の上端に臨む
ように移動させるようにすればよい、ポイズン棒
３は非常に細長いものであるから、容易に撓ませ
ることができる。 Note that the guide 6 may be moved horizontally instead of being swung; in that case, the tip of the burnable poison rod 3 is inserted into the upper end of the guide 6, or the burnable poison rod 3 is inserted into the upper end of the guide 6, or It is only necessary to move the poison rod 3 so that the lower end thereof faces the upper end of the guide 6. Since the poison rod 3 is very elongated, it can be easily bent.
一方、バーナブルポイズン棒３が切取られた保
持体２はシンブルプラグ４が取付けられた状態で
第１のバスケツト９中に挿入され、軸方向に積み
重ねられる。この際、保持体２は１個おきに反転
して挿入され、バスケツト９内でシンブルプラグ
４が互いに重なるようにする。保持体２は高さ
L1が小さく、かつシンブルプラグ４が互いに重
ね合わされるために、１つのバスケツト９中に多
数の保持体２が収納できる。 On the other hand, the holding body 2 from which the burnable poison rod 3 has been cut is inserted into the first basket 9 with the thimble plug 4 attached, and stacked in the axial direction. At this time, every other holding body 2 is reversed and inserted so that the thimble plugs 4 overlap each other within the basket 9. Holder 2 has a height
Since L 1 is small and the thimble plugs 4 are stacked on top of each other, a large number of holders 2 can be accommodated in one basket 9.
バーナブルポイズン棒３および保持体２を一杯
に収納させたバスケツト８および９は燃料貯蔵ピ
ツト中に貯蔵される。この貯蔵状態ではその容積
はバーナブルポイズン集合体１のままで収納する
ばあいに比較するとその容積を1/10程度まで減少
させることができる。 Baskets 8 and 9 filled with burnable poison rods 3 and holders 2 are stored in a fuel storage pit. In this storage state, the volume can be reduced to about 1/10 compared to the case where the burnable poison aggregate 1 is stored as is.
以上説明したように、この発明は使用済のバー
ナブルポイズン集合体を貯蔵するに際し、バーナ
ブルポイズン棒をその中実部で切断してバスケツ
ト内に整列配置すると共に保持体は別のバスケツ
トに軸方向に重ねて挿入させるようにしたもので
あり、それぞれ隙間なく、収納できるために貯蔵
容積を大幅に減少させることができるものであ
る。 As explained above, when storing a used burnable poison aggregate, the present invention cuts the burnable poison rods at their solid parts and arranges them in a basket, and the holder is attached to another basket. They are designed to be inserted one above the other in the same direction, and can be stored without any gaps between them, thereby significantly reducing the storage volume.
第１図はこの発明を適用するバーナブルポイズ
ン集合体の斜視図、第２図はその下面図、第３図
はその側面図、第４図はこの発明を実施する過程
を示す説明図、第５図はバスケツトの部分切欠き
斜視図である。
１……バーナブルポイズン集合体、２……保持
体、３……バーナブルポイズン棒、５……切断
刃、６……ガイド、８，９……バスケツト、８０
……ガイドチユーブ。
Fig. 1 is a perspective view of a burnable poison aggregate to which the present invention is applied, Fig. 2 is a bottom view thereof, Fig. 3 is a side view thereof, Fig. 4 is an explanatory diagram showing the process of carrying out the invention; FIG. 5 is a partially cutaway perspective view of the basket. 1... Burnable poison aggregate, 2... Holding body, 3... Burnable poison rod, 5... Cutting blade, 6... Guide, 8, 9... Basket, 80
...Guide tube.
Claims (1)
定本数ずつその保持体附近の中実部で切断し、上
記保持体は第１のバスケツト中に順次軸方向に重
ねて収納し、切断したポイズン棒はガイド手段を
通過させることによつて一列に整列させると共に
ローラで挾みつけて移送させ、一方第２のバスケ
ツト内にポイズン棒が１本収納されるガイドチユ
ーブを複数本、所定の配列で配置させ、上記ロー
ラによつて送り出されるポイズン棒がバスケツト
内の所定位置に収納されるように上記ガイド手段
およびローラを移動させてそれぞれガイドチユー
ブ内に挿入させ、上記各操作を水中で行なうこと
を特徴とする使用済燃料内挿物の減容処理方法。1. Cut a predetermined number of poison rods of a burnable poison aggregate at the solid part near the holder, store the holders in a stacked manner in the axial direction in a first basket, and cut the poison rods into guides. The poison rods are arranged in a line by passing through a means, and are transferred by being pinched by rollers, while a plurality of guide tubes in which one poison rod is stored are arranged in a predetermined arrangement in the second basket, and the above-mentioned A use characterized in that the guide means and the rollers are moved and inserted into the guide tubes so that the poison rod sent out by the rollers is stored in a predetermined position in the basket, and each of the above operations is performed underwater. A method for reducing the volume of finished fuel inserts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57109288A JPS58225400A (en) | 1982-06-24 | 1982-06-24 | Method for reducing the volume of waste inside spent fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57109288A JPS58225400A (en) | 1982-06-24 | 1982-06-24 | Method for reducing the volume of waste inside spent fuel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58225400A JPS58225400A (en) | 1983-12-27 |
| JPS6328277B2 true JPS6328277B2 (en) | 1988-06-07 |
Family
ID=14506370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57109288A Granted JPS58225400A (en) | 1982-06-24 | 1982-06-24 | Method for reducing the volume of waste inside spent fuel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58225400A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60201292A (en) * | 1984-03-26 | 1985-10-11 | 原子燃料工業株式会社 | Custody device for spent burnable poison rod |
| US11817223B2 (en) * | 2021-06-23 | 2023-11-14 | Westinghouse Electric Company Llc | Device for magnetically removing a capsule containing Co-60 from a burnable absorber rodlet |
-
1982
- 1982-06-24 JP JP57109288A patent/JPS58225400A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58225400A (en) | 1983-12-27 |
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