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1. 发明专利

JPH036494A PRESSURIZATION MEASURING DEVICE AND GAGE FOR NUCLEAR FUEL ROD, ETC. 失效
公开(公告)号：JPH036494A
公开(公告)日：1991-01-11
申请号：JP12563190
申请日：1990-05-17
申请人： WESTINGHOUSE ELECTRIC CORP
发明人： JIEIMUZU ARAN SUPAROU , JIYON JIYOZEFU MAKEBOI
IPC分类号： G01B7/16 , G21C17/06
摘要： PURPOSE: To measure internal applied pressure by providing a gauge means comprising C-shape bracket in an axial opening extending into a reception member 20 and measuring the increase of fuel rod diameter. CONSTITUTION: An axial opening extending into a reception member 20 forms a center axial line and accepts one end part 31 of a fuel rod 30 on the same axis which is fitted with an internal stopper 26. Then a gauge means 40 for measuring the diameter increase due to pressure increase in the fuel rod 30 or control rod is formed as a C-shape bracket 41 having end parts 42 and 34 and a middle part 44, and at the outer part of the middle part 44 and inner surface 48 and 47, first and second electric resistance strain gauges 50 and 60 are mounted and connected to an amplifier/processor with electric cables 71 and 72. By measuring the electric power from the strain gauges 50 and 60 with the amplifier/processor, the diameter increase during pressurizing in the fuel rod 30 can be obtained. That is, by measuring whether the diameter of the fuel rod increased by predicted degree during the internal pressurizing, whether proper pressure is applied or not is determined.

2. 发明专利

JPH05196767A DOUBLE-ENCLUSURE-WALL TYPE UPPER NOZZLE ASSEMBLY FOR NUCLEAR FUEL ASSEMBLY 失效
公开(公告)号：JPH05196767A
公开(公告)日：1993-08-06
申请号：JP19394892
申请日：1992-07-21
申请人： WESTINGHOUSE ELECTRIC CORP
发明人： JIEIMUZU ARAN SUPAROU , ROBAATO UORUTON KANTORERU
IPC分类号： G21C3/33 , G21C3/12
摘要： PURPOSE: To obtain an upper nozzle which absorbs an excess thermal expansion while avoiding contact with the fuel rod without impairing a handling capacity of reactor core equipment presently used. CONSTITUTION: An upper nozzle assembly 12 is provided with an upper structure 24 having an upper plate 32 and an external surrounding wall 34 and a lower structure 26 which has an internal surrounding wall 60 arranged in the external surrounding wall 34 below a lower adaptor plate 58 and the upper plate 32. The external and internal surrounding walls are made relatively slidable when the upper plate 32 moves with respect to the adaptor plate 58. A plurality of elastically deformable plate springs 74 are extended between the upper plate 32 and the lower adaptor plate 58 to combined with the upper plate 32 and the lower adaptor plate 58. Motion in the direction of separation of the upper pate 32 and the lower adaptor plate 58 is limited by an engagement structure 28 between the external and internal surrounding walls. A plate spring enables the upper plate to make a motion of approaching or separating from the adaptor plate.

3. 发明专利

JPH0282192A CONTROL ASSEMBLY OF NUCLEAR FUEL AGGREGATE 失效
公开(公告)号：JPH0282192A
公开(公告)日：1990-03-22
申请号：JP20583689
申请日：1989-08-10
申请人： WESTINGHOUSE ELECTRIC CORP
发明人： JIEIMUZU ARAN SUPAROU , ROBAATO KENESU JIYAATSUEN , RONARUDO POORU NOTSUTO
IPC分类号： G21C7/117
摘要： PURPOSE: To facilitate the fixing of a control rod to a spider by providing an engagement means for separation movement wherein one of a plug part is fixed to the connection part of a supporting structure and the other to the control rod while separation is allowed. CONSTITUTION: An attaching joint 74 is provided with a thin-long split upper end plug 28 comprising two parts which are detachably mounted on the control rod 72, and an end plug 78 comprises separate upper side and lower side plug parts 80 and 82. The part 80 comprises an upper side part 80A, an intermediate part 80B and a lower side part 80C which are continuously combined in a body, and the part 82 comprises a part 82A, a part 82B and a part 82C which are continuously and mechanically combined each other. A finger-like member 76 comprises a threaded hole 88 formed at the upper end part of a shaft holes 84 and 85 extending from an open lower end part 86 as far as a lower part 76A of a member 76. The part 80B of the part 80 and the part 82A of the part 82 are, so that screw-engagement is not loosened during normal operation of reactor, provided with complementary lacking means 108 and 110 which lock the thread-engaged parts 80 and 82.

4. 发明专利

JPH04231896A DASH POT OF GUIDE THIMBLE FOR CONTROL ROD 失效
公开(公告)号：JPH04231896A
公开(公告)日：1992-08-20
申请号：JP12341691
申请日：1991-05-28
申请人： WESTINGHOUSE ELECTRIC CORP
发明人： KURARENSU DANIERU JIYON JIYUNI , JIEIMUZU ARAN SUPAROU
IPC分类号： G21C3/326 , G21C3/332 , G21C7/20
摘要： PURPOSE: To make it possible to easily manufacture a low-cost dash pot by connecting a main tube to a sub-tube by welding or bulge joint and providing a flared end at the sub-tube to form a transfer part. CONSTITUTION: The dash pot 82 comprises a tubular lower part 84A of a main hollow tube 84 and a hollow sub-tube 86 inserted into the lower part 84A of the tube 84. The tube 84 has an outer diameter slightly smaller than the inner diameter of the tube 84 to shrink fit the inner surface of the tube 84. The tube 86 has an upper end part 86c having the inner surface of an axial sectional shape extending upward and outward to form a tapered transfer part to connect the both the inner and outer surfaces of the tube 86 to be extended therebetween. The lower end of the tube 86 is mounted at an end plug 88. Thus, the low-cost pot 82 can be easily manufactured.

5. 发明专利

JPH036492A UPPER NOZZLE SUB-ASSEMBLY OF NUCLEAR FUEL AGGREGATE 失效
公开(公告)号：JPH036492A
公开(公告)日：1991-01-11
申请号：JP12563390
申请日：1990-05-17
申请人： WESTINGHOUSE ELECTRIC CORP
发明人： JIEIMUZU ARAN SUPAROU , YUU CHIYAN RII
IPC分类号： G21C3/12 , G21C3/33
摘要： PURPOSE: To allow growth of nuclear fuel rods sue to thermal expansion and improve burnup by constituting upper tieplate and lower tieplate as to be capable of accessing and separating within a side wall enclosure. CONSTITUTION: If the downward supporting contact force of an upper core support plate pressing on an upper plate 30 of upper nozzle assembly 12 is removed, an upper structure 24 is separated from a lower adapter plate 26 by a coil spring 60 and becomes an expanded state. At this moment, the seating structure 56 of the plate 26 and the holding structure 44 of a side wall enclosure 32 couple to hold the plate 26 within the enclosure 32. By this, the interval between both plates 26 and 30 becomes maximum and a sufficient space to insert the structure elements of fuel assembly treatment device in the hole of the plate 30 is created. Then, by adding downward support contact force to the plate 30 to push the spring 60 and sliding the enclosure 32 downward against the plate 26, the assembly 12 can be made compressed state and the distance between the plate 26 and fuel rod 18 upper end becomes large and therefore, the growth of fuel rods 18 can be allowed.

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