JPS6359117B2 - - Google Patents
Info
- Publication number
- JPS6359117B2 JPS6359117B2 JP57040156A JP4015682A JPS6359117B2 JP S6359117 B2 JPS6359117 B2 JP S6359117B2 JP 57040156 A JP57040156 A JP 57040156A JP 4015682 A JP4015682 A JP 4015682A JP S6359117 B2 JPS6359117 B2 JP S6359117B2
- Authority
- JP
- Japan
- Prior art keywords
- rod
- fuel assembly
- nozzle
- coil spring
- load cell
- 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
- 239000000446 fuel Substances 0.000 claims description 36
- 239000000725 suspension Substances 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 239000003758 nuclear fuel Substances 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 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
- Load-Engaging Elements For Cranes (AREA)
- Control And Safety Of Cranes (AREA)
Description
【発明の詳細な説明】
この発明は原子燃料集合体主として加圧水型原
子炉の燃料集合体を定期的な検査又は交換のため
に炉心から出し入れするための取扱い装置の改良
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a handling device for moving nuclear fuel assemblies, primarily fuel assemblies of pressurized water reactors, into and out of a reactor core for periodic inspection or replacement.
第１図イ，ロ，ハは加圧水型原子炉の燃料集合
体Ａの正面、上部ノズルＢの上面および下部ノズ
ルＣの下面をそれぞれ示すものであるが、この種
燃料集合体Ａは、一般に下部ノズルＣの一対角線
上の脚部に設けたピン挿通孔C1を下部炉心板Ｄ
上のピンD1に嵌合させて、多数体のものが僅か
な間隙（約１mm〜２mm）をおいて下部炉心板Ｄ上
に配列され、上方においては各体の上部ノズルＢ
の四周に取付けたリーフスプリングＳを圧迫する
状態に上部炉心板（図示せず）によりおおわれて
炉心内に収容されている。 Figure 1 A, B, and C respectively show the front of fuel assembly A, the upper surface of upper nozzle B, and the lower surface of lower nozzle C of a pressurized water reactor. The pin insertion hole C1 provided in the leg on one diagonal of the nozzle C is inserted into the lower core plate D.
Fitted into the upper pin D 1 , multiple pieces are arranged on the lower core plate D with a slight gap (approximately 1 mm to 2 mm), and the upper nozzle B of each piece is arranged above.
The upper core plate (not shown) presses the leaf springs S attached to the four circumferences of the upper core plate and is housed in the core.
そして、定期的な検査や交換のために各燃料集
合体Ａを炉心内から出し入れする際には、イ図鎖
線のようにロードセル３を介してクレーン４のワ
イヤ４ａに連結された燃料取扱い装置１（いわゆ
るマニユプレータクレーン）の吊り杆２を燃料集
合体Ａの上部ノズルＢの中に差し込み、これを開
いて下端のフツク２ａを上部ノズルＢの上縁に掛
け止め、燃料集合体Ａを吊り上げたり、吊り降ろ
したりしており、その際ロードセル３によつてク
レーンに加わる荷重を検出し作業の安全を図るよ
うにしている。 When each fuel assembly A is taken in and out of the core for periodic inspection or replacement, a fuel handling device 1 is connected to a wire 4a of a crane 4 via a load cell 3 as shown by the chain line in FIG. Insert the suspension rod 2 of a so-called manipulator crane into the upper nozzle B of the fuel assembly A, open it, hook the lower end hook 2a on the upper edge of the upper nozzle B, and then remove the fuel assembly A. During lifting and lowering, a load cell 3 detects the load applied to the crane to ensure work safety.
しかし、このものでは取扱い装置１の上方に一
つのロードセル３を配設して燃料集合体Ａを吊り
下げる形式をとつているために、クレーン４にか
かる総荷重（集合体（約500Kg）や取扱い装置の
重量および摩さつ力など）しか検出することがで
きず、燃料集合体Ａがどんな状態にあるかを知る
ことができない。 However, in this case, one load cell 3 is disposed above the handling device 1 to suspend the fuel assembly A, so the total load on the crane 4 (the assembly (approximately 500 kg) The device weight, grinding force, etc.) can only be detected, and it is not possible to know what state the fuel assembly A is in.
例えば、燃料集合体Ａを出し入れする際、第２
図イ，ロのように燃料集合体Ａの一部の支持格子
Ｅが隣りの集合体の支持格子に引掛つたり又は下
部ノズルＣの一方のピン挿通孔C1は下部炉心板
ＤのピンD1に整合したが、他方の挿通孔は整合
せず下部ノズルＣの一部がピンD1上にのり上げ
て、燃料集合体Ａを傾けるような原因が存在した
にしてもこれを知ることができない。 For example, when loading and unloading fuel assembly A, the second
As shown in Figures A and B, the support grid E of a part of the fuel assembly A is caught on the support grid of the adjacent assembly, or the pin insertion hole C 1 of one of the lower nozzles C is connected to the pin D of the lower core plate D. 1 , but the other insertion hole is not aligned and part of the lower nozzle C climbs onto the pin D1 , causing the fuel assembly A to tilt. Even if there is a cause, it is difficult to know this. Can not.
このような状態にあるに拘らず、燃料集合体Ａ
を無理に押し込んだり、引き上げたりすれば、支
持格子Ｅを破損したり、燃料棒を損傷したりして
炉の正常な運転を妨げ、また燃料集合体Ａに傾き
を生じると片上りになつた側の上部ノズルＢの縁
から吊り杆２が外れる恐れがあり危険を伴う。 Regardless of this condition, fuel assembly A
If the fuel assembly A is pushed in or pulled up forcibly, it will damage the support grid E and damage the fuel rods, preventing normal operation of the reactor, and if the fuel assembly A is tilted, it will end up on one side. The hanging rod 2 may come off from the edge of the upper nozzle B on the side, which is dangerous.
この発明は上記の欠点を改良すべく工夫された
もので、燃料集合体の出し入れに際し、その支障
状態を直ちに検出して集合体の損傷を未然に防ぎ
と共に不測の危険を防止することを目的とし、燃
料集合体を吊持する取扱い装置として複数の吊り
杆を上部杆と下部杆で形成し、各上部杆と各下部
杆とをコイルばねを介して連結し、各下部杆の途
中にはロードセルをそれぞれ配設したことを特徴
とするものである。 This invention has been devised to improve the above-mentioned drawbacks, and its purpose is to immediately detect any hindrance when loading or unloading fuel assemblies, thereby preventing damage to the assemblies and preventing unexpected dangers. As a handling device for suspending the fuel assembly, a plurality of suspension rods are formed by upper and lower rods, each upper rod and each lower rod are connected via a coil spring, and a load cell is installed in the middle of each lower rod. It is characterized by the fact that it is arranged in each case.
第３図ないし第５図を参照の上、この発明につ
いて説明すれば、１０は取扱い装置であつて、上
記のものと同様に油圧操作のアクチユエータを内
蔵した操作箱１１に複数（図示のものでは４本）
の吊り杆１２が一つの円周上等間隔に回動可能に
垂設されているが、これらの吊り杆１２は操作箱
１１中に枢支される上部杆１２ａと下端フツク１
２ｃを有する下部杆１２ｂとで構成されており、
各下部杆１２ｂの上端には第５図のようにばね箱
１３が取付けられ、そのばね箱１３の中に上部杆
１２ａの下端部が摺動可能に挿入され、上部杆１
２ａの下端つばとばね箱１３の上壁との間に所要
強さ（大体1800Kg／cm程度）のコイルばね１４が
配設され、このコイルばね１４を介して上部杆１
２ａと下部杆１２ｂとは伸縮可能に連結されてい
る。 The present invention will be described with reference to FIGS. 3 to 5. Reference numeral 10 denotes a handling device, which is installed in a plurality of operating boxes 11 (not shown in the drawings) which are equipped with hydraulically operated actuators similar to those described above. 4 pieces)
Hanging rods 12 are rotatably hung vertically at equal intervals on one circumference, and these hanging rods 12 are connected to an upper rod 12a and a lower end hook 1 that are pivotally supported in the operation box 11.
2c and a lower rod 12b,
A spring box 13 is attached to the upper end of each lower rod 12b as shown in FIG. 5, and the lower end of the upper rod 12a is slidably inserted into the spring box 13.
A coil spring 14 having a required strength (approximately 1800 kg/cm) is installed between the lower end collar of the spring box 2a and the upper wall of the spring box 13, and the coil spring 14 is connected to the upper rod 1 via this coil spring 14.
2a and the lower rod 12b are extendably connected.
また、各下部杆１２ｂの途中にはロードセル１
５（容量0.5t〜1t程度）がそれぞれ配設されてお
り、各ロードセル１５に接続された出力取り出し
用のコード１６は操作箱１１を通つて制御室に導
かれている。 In addition, a load cell 1 is placed in the middle of each lower rod 12b.
5 (capacity: about 0.5 t to 1 t) are respectively disposed, and a cord 16 for taking out the output connected to each load cell 15 is led to the control room through the operation box 11.
そして、操作箱１１はロツド１１ａを介してク
レーンのワイヤ１７に懸吊されている。 The operation box 11 is suspended from a crane wire 17 via a rod 11a.
なお、図中１８ａ，１８ｂは操作箱１１の下面
隅部に設けられたガイドピンおよび位置決めピン
であり、また、１９ａ，１９ｂはばね箱１３の側
部および下部杆１２ｂの上端に設けられた空気孔
である。 In the figure, 18a and 18b are guide pins and positioning pins provided at the bottom corners of the operation box 11, and 19a and 19b are air guide pins and positioning pins provided at the sides of the spring box 13 and the upper end of the lower rod 12b. It is a hole.
上述のような構成のもとに、検査の終了した燃
料集合体又は交換のための燃料集合体を炉心内に
収容するに当たつては、操作箱１１下面のガイド
ピン１８ａおよび位置決めピン１８ｂを上部ノズ
ルＢの各対応孔に嵌挿すると共に複数の吊り杆１
２を上部ノズルＢ中に挿入し、操作箱１１内のア
クチユエータを作動して各吊り杆１２を第３図点
線のように外方に開き、下端フツク１２ｃを上部
ノズルＢの四周上縁に掛け止めて燃料集合体を吊
り下げ、これを炉心内の所定の場所に挿入する。 Based on the above configuration, when storing a fuel assembly that has been inspected or a fuel assembly for replacement into the reactor core, the guide pin 18a and positioning pin 18b on the bottom surface of the operation box 11 are moved. A plurality of hanging rods 1 are inserted into each corresponding hole of the upper nozzle B.
2 into the upper nozzle B, actuate the actuator in the operation box 11 to open each hanging rod 12 outward as shown by the dotted line in Figure 3, and hang the lower end hook 12c on the upper edge of the four circumferences of the upper nozzle B. Stop, suspend the fuel assembly, and insert it into a predetermined location within the reactor core.
その際、何らの障害がなければ各吊り杆１２上
ロードセル１５には燃料集合体に関連する荷重が
均等にかかつているが、若し、前述のように挿入
過程において、一部の支持格子が隣接するものの
支持格子に引掛つたり又は下部ノズルの一部が下
部炉心板のピン上にのり上げたりした際には、そ
の支障を生じた側の吊り杆１２に作用する荷重が
他の側のものより少なくなり、そのことが当該吊
り杆１２上のロードセル１５によつて直ちに検出
されることになる。又、吊り下げ状態の燃料集合
体に横向きの力が加わつた場合には、その反対側
の荷重が少なくなり、やはりロードセル１５によ
り検出される。 At that time, if there is no obstruction, the load related to the fuel assembly will be applied equally to the load cells 15 on each suspension rod 12, but if some of the support grids are removed during the insertion process as described above, If the lower nozzle gets caught in the support grid of an adjacent object or if part of the lower nozzle rides up on the pin of the lower core plate, the load acting on the suspension rod 12 on the affected side will be transferred to the other side. This will be immediately detected by the load cell 15 on the suspension rod 12. Furthermore, when a lateral force is applied to the suspended fuel assembly, the load on the opposite side decreases, which is also detected by the load cell 15.
そして、この事実が検出されたときには、クレ
ーンによつて燃料集合体を上方に吊り戻し、その
姿勢を直して再び吊り降ろすようにする。 When this fact is detected, the fuel assembly is lifted back up using a crane, its posture is corrected, and the fuel assembly is lifted down again.
一方、上記のような支障により燃料集合体に傾
きが生じた場合、これを吊持している吊り杆１２
のうち片上りになつた側の吊り杆１２すなわち荷
重の少なくなつた側の吊り杆１２の下端フツク１
２Ｃが上部ノズルＢの係止縁から離れようとする
が、その吊り杆１２中間のばね箱１３内で圧縮状
態にあるコイルばね１４が荷重の変化に応じて伸
び下部杆１２ｂを第５図点線矢印のように引き上
げるように作用し、下端フツク１２Ｃを上部ノズ
ルＢの傾きに追従させその係止縁から離脱しない
ようにする。 On the other hand, if the fuel assembly is tilted due to the above-mentioned trouble, the suspension rod 12 that suspends it
The lower end hook 1 of the hanging rod 12 on the one-sided side, that is, the hanging rod 12 on the side with less load.
2C tries to separate from the locking edge of the upper nozzle B, but the coil spring 14, which is in a compressed state in the spring box 13 in the middle of the hanging rod 12, expands in response to the change in load and moves the lower rod 12b along the dotted line in Figure 5. It acts to pull up as shown by the arrow, and causes the lower end hook 12C to follow the inclination of the upper nozzle B so that it does not separate from its locking edge.
この場合、コイルばね１４は第５図のような圧
縮形式としないで、上部杆１２ａと下部杆１２ｂ
とを直接連結した引張りばねとしても同じであ
る。 In this case, the coil spring 14 is not compressed as shown in FIG.
The same applies to a tension spring in which the two are directly connected.
なお、燃料集合体を炉心内から吊り上げる場合
の作用も上記の場合と変りないが、この場合には
支障を生じた側のロードセル１５には他のものよ
り大きな荷重が検出されることになる。 Note that the effect when lifting a fuel assembly from within the core is the same as in the above case, but in this case, a larger load will be detected on the load cell 15 on the side where the problem has occurred than on the other ones.
以上のようにこの発明によれば、原子燃料集合
体を吊持する取扱い装置として、複数の吊り杆を
それぞれ上部杆と下部杆とで形成し、各上部杆と
各下部杆をコイルばねを介して連結し、各下部杆
の途中にはロードセルをそれぞれ配設したので、
炉心内から燃料集合体を出し入れする際、燃料集
合体を傾けるような状態が生じたにしても、その
状態をロードセルによつて直ちに検出することが
でき、燃料集合体の姿勢を直して収容することが
可能で燃料集合体の無理な押し込みや引き抜きを
防止できるため、支持格子や燃料棒の損傷を未然
に防ぐことができ、また各吊り杆は燃料集合体が
傾いたにしても上部ノズルによく追従してこれか
ら離脱せず、下測の危険を防止することができ
る。 As described above, according to the present invention, as a handling device for suspending a nuclear fuel assembly, a plurality of suspension rods are each formed of an upper rod and a lower rod, and each upper rod and each lower rod are connected via coil springs. and connected each other, and a load cell was placed in the middle of each lower rod, so
Even if the fuel assembly is tilted when taking it in or out of the reactor core, the load cell can immediately detect this situation and correct the attitude of the fuel assembly to accommodate it. This prevents the fuel assembly from being forced into or pulled out, which prevents damage to the support grid and fuel rods.Also, even if the fuel assembly is tilted, each suspension rod can be attached to the upper nozzle. It follows well and does not deviate from it, which prevents the risk of under-preparation.
第１図イは加圧水型原子炉の燃料集合体の収容
状態と従来の取扱い装置の掛け止め状態を示す側
面図。同図ロは上部ノズルの上面図。同図ハは下
部ノズルの下面図。第２図イ，ロは燃料集合体に
障害の生じたときの説明図。第３図はこの発明の
側面図。第４図は下面図。第５図はばね箱部分の
断面図。
図中、１０……取扱い装置、１１……操作箱、
１２……吊り杆、１２ａ……上部杆、１２ｂ……
下部杆、１２ｃ……フツク、１３……ばね箱、１
４……コイルばね、１５……ロードセル、Ａ……
燃料集合体、Ｂ……上部ノズル、Ｃ……下部ノズ
ル。
FIG. 1A is a side view showing a state in which a fuel assembly of a pressurized water reactor is accommodated and a state in which a conventional handling device is latched. Figure B is a top view of the upper nozzle. Figure C is a bottom view of the lower nozzle. Figures 2A and 2B are explanatory diagrams when a failure occurs in the fuel assembly. FIG. 3 is a side view of the invention. Figure 4 is a bottom view. Figure 5 is a sectional view of the spring box. In the figure, 10...handling device, 11...operation box,
12... Hanging rod, 12a... Upper rod, 12b...
Lower rod, 12c...Hook, 13...Spring box, 1
4...Coil spring, 15...Load cell, A...
Fuel assembly, B...upper nozzle, C...lower nozzle.
Claims (1)
を回動可能に垂設し、各吊り杆の下端フツクを上
部ノズルに掛け止めて燃料集合体を吊持するもの
において、上記複数の吊り杆を上部杆と下部杆で
形成し、各上部杆と各下部杆とをコイルばねを介
して連結し、各下部杆の途中にはロードセルをそ
れぞれ配設したことを特徴とする原子燃料集合体
の取扱い装置。 ２ 上部杆と下部杆との間に介在するコイルばね
を圧縮ばねとしたことを特徴とする特許請求の範
囲第１項記載の原子燃料集合体の取扱い装置。 ３ 上部杆と下部杆との間に介在するコイルばね
を引張りばねとしたことを特徴とする特許請求の
範囲第１項記載の原子燃料集合体の取扱い装置。[Scope of Claims] 1. A fuel assembly in which a plurality of hanging rods are rotatably suspended from an operation box connected to a crane, and the lower end hook of each hanging rod is hooked to an upper nozzle to suspend a fuel assembly. , wherein the plurality of suspension rods are formed by an upper rod and a lower rod, each upper rod and each lower rod are connected via a coil spring, and a load cell is disposed in the middle of each lower rod. Equipment for handling nuclear fuel assemblies. 2. The nuclear fuel assembly handling device according to claim 1, wherein the coil spring interposed between the upper rod and the lower rod is a compression spring. 3. The nuclear fuel assembly handling device according to claim 1, wherein the coil spring interposed between the upper rod and the lower rod is a tension spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57040156A JPS58158594A (en) | 1982-03-16 | 1982-03-16 | Nuclear fuel assembly handling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57040156A JPS58158594A (en) | 1982-03-16 | 1982-03-16 | Nuclear fuel assembly handling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58158594A JPS58158594A (en) | 1983-09-20 |
| JPS6359117B2 true JPS6359117B2 (en) | 1988-11-17 |
Family
ID=12572897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57040156A Granted JPS58158594A (en) | 1982-03-16 | 1982-03-16 | Nuclear fuel assembly handling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58158594A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0419522U (en) * | 1990-06-07 | 1992-02-19 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61277086A (en) * | 1985-06-03 | 1986-12-08 | 株式会社日立製作所 | Fuel changer |
| FR2979624B1 (en) * | 2011-09-02 | 2013-08-23 | Aircelle Sa | DEVICE FOR HANDLING A LOAD |
| CN108657943B (en) * | 2018-05-22 | 2019-09-06 | 广东核电合营有限公司 | Spent Fuel Pool dilatation screen work hanging apparatus |
-
1982
- 1982-03-16 JP JP57040156A patent/JPS58158594A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0419522U (en) * | 1990-06-07 | 1992-02-19 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58158594A (en) | 1983-09-20 |
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