JPH01146193U

JPH01146193U -

Info

Publication number: JPH01146193U
Application number: JP1988043238U
Authority: JP
Priority date: 1988-03-31
Filing date: 1988-03-31
Publication date: 1989-10-09

Description

[Brief explanation of the drawing]

第１図は本考案に係るウオータロツドまたはウ
オータチヤンネルの支持装置を具備した燃料集合
体の一部を切欠した正面図、第２図は第１図の要
部拡大縦断正面図、第３図は第２図とは別異の支
持装置下部側を示す一部切欠略示正面図、第４図
は第３図の下部タイプレートを示した平面説明図
、第５図、第６図は同上装置に用いる夫々板ばね
、浮き上り防止用板ばねの一実施例を示す平面図
、第７図、第８図は同上装置の他実施例を示す下
部側の各一部切欠略示正面図、第９図、第１０図
、第１１図の各ａ，ｂはウオータロツドまたはウ
オータチヤンネルの下部端栓を示す夫々一部切欠
の正面図と下面図、第１２図ａ，ｂ，ｃは当該下
部端栓の異種例を示した夫々正面図と各別種の下
面図、第１３図は従来の沸騰水型原子炉用燃料集
合体を示す一部切欠の正面図、第１４図は同上燃
料集合体の要部を示した縦断拡大正面図である。１……上部タイプレート、３……下部タイプレ
ート、３ａ……下部タイプレート上載面、４……
燃料棒、５……ウオータロツドまたはウオータチ
ヤンネル、５ａ……上部端栓、５ｂ……下部端栓
、５ｃ……下端球状面、７……嵌挿縦孔、８……
板ばね、８ａ……曲成弾性部、９……浮き上り防
止用板ばね、９ａ……曲成弾性部。 Fig. 1 is a partially cutaway front view of a fuel assembly equipped with a water rod or water channel support device according to the present invention, Fig. 2 is an enlarged longitudinal sectional front view of the main part of Fig. Fig. 4 is a partially cutaway schematic front view showing the lower side of the support device, which is different from Fig. 2; Fig. 4 is an explanatory plan view showing the lower tie plate of Fig. 3; Figs. FIGS. 7 and 8 are a plan view showing an embodiment of the leaf spring used and a leaf spring for preventing lifting; FIGS. Figures a and b in Figures 10 and 11 are partially cutaway front and bottom views showing the lower end plug of a water rod or water channel, respectively, and Figures 12 a, b, and c are views of the lower end plug of the water rod or water channel. A front view and a bottom view of each different type of example, FIG. 13 is a partially cutaway front view of a conventional boiling water reactor fuel assembly, and FIG. 14 is a main part of the same fuel assembly. It is a longitudinal enlarged front view showing. 1... Upper tie plate, 3... Lower tie plate, 3a... Lower tie plate mounting surface, 4...
Fuel rod, 5... Water rod or water channel, 5a... Upper end plug, 5b... Lower end plug, 5c... Lower end spherical surface, 7... Vertical insertion hole, 8...
Leaf spring, 8a... Curved elastic part, 9... Lifting prevention plate spring, 9a... Curved elastic part.

Claims

[Scope of utility model registration request]

An upper end plug and a lower end plug of a vertically installed water rod or water channel are loosely fitted into a vertical insertion hole bored in an upper tie plate of a fuel assembly, and the upper end plug is loosely fitted into a vertical insertion hole drilled in an upper tie plate of a fuel assembly. A large number of fuel rods are vertically installed at intervals between the tie plate and the lower tie plate, and the latter are connected and supported by the upper end plug of the required adjacent fuel rod and a leaf spring with a bending elastic part. The lower end spherical surface is supported on the mounting surface of the plate so as to be able to move laterally, and the lower end plug is connected to the lower end plug of a required adjacent fuel rod among the fuel rods, and a float having a curved elastic part. A water rod or water channel support device for a fuel assembly connected by a leaf spring for preventing climbing.