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1. 发明专利

DE3203289A1 未知
公开(公告)号：DE3203289A1
公开(公告)日：1982-10-07
申请号：DE3203289
申请日：1982-02-01
申请人： HITACHI LTD
发明人： SAKURAI MIKIO , NAKAMURA SHIRO , IGARASHI TAKAO , YAMAUCHI KOKI
IPC分类号： G21C7/14 , G21C1/08 , G21C3/322 , G21C15/04 , G21C7/08
摘要： A nuclear reactor having a reactor vessel adapted to be supplied with a coolant, a reactor core disposed in the reactor vessel and including a plurality of fuel assemblies, a plurality of control rods adapted to be inserted into the reactor core and a plurality of control rod driving devices for driving the control rods into and out of the reactor core. A plurality of tubular coolant passage members are disposed above the fuel assemblies so as to receive the heated coolant discharged from the fuel assemblies, so that the heated coolant flows upwardly through the tubular coolant passage members. The tubular coolant passage members provide a chimney effect which enhances the upward flow of the coolant and, hence, increases the flow rate of coolant flowing through the reactor core. In consequence, a greater cooling effect is obtained and the range of power controllable by the control rods is widened. In consequence, the construction of the reactor is simplified and the size is decreased due to elimination of coolant recycling system in the reactor vessel.

2. 发明专利

DE3374246D1 未知
公开(公告)号：DE3374246D1
公开(公告)日：1987-12-03
申请号：DE3374246
申请日：1983-07-08
申请人： HITACHI LTD
发明人： SAKURAI MIKIO , YAMAUCHI KOKI , SUZUKI SHUJI
IPC分类号： G21C3/344 , G21C3/34
摘要： A plurality of independent cells (9) having a regular octagonal cross section are arranged in the form of a lattice. Cross-sectionally square independent cells (9) are substituted for two octagonal cells in the central portion of the lattice arrangement. These two square independent cells (9) are so formed that each side of the cells (9) has the largest possible length when the cells are placed among the adjacent cells having a regular octagonal cross section. Spacer support rods (5) serving also as water rods are inserted into the square cells (9) in such a fuel spacer (4), which consists of a combination of cells having a regular octagonal cross section and cells having a square cross section as mentioned above, to form a fuel assembly.

4. 发明专利

DE3716565A1 未知
公开(公告)号：DE3716565A1
公开(公告)日：1987-11-26
申请号：DE3716565
申请日：1987-05-18
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SAKURAI MIKIO , HAYASHI TSUTOMU , IZUMI MASAYUKI , SASAKI HIROSHI , SATHO THORU , OWADA KAZUO
IPC分类号： B08B3/10 , G21F9/00 , G21F9/28 , B08B3/00

5. 发明专利

JPS6235286A BOILING WATER TYPE REACTOR 失效
公开(公告)号：JPS6235286A
公开(公告)日：1987-02-16
申请号：JP17482585
申请日：1985-08-08
申请人： HITACHI LTD
发明人： MOCHIDA TAKAAKI , SAKURAI MIKIO , YOSHIMOTO YUICHIRO , SHIMOJU TAKANORI , NISHIMURA AKIRA , KOBAYASHI MASAYUKI
IPC分类号： G21C1/08 , G21C5/12

9. 发明专利

JPS5285304A ROTARY ELECTRIC MACHINE 失效
公开(公告)号：JPS5285304A
公开(公告)日：1977-07-15
申请号：JP82976
申请日：1976-01-07
申请人： HITACHI LTD
发明人： IKEDA KAZUO , AOYAMA TETSUO , SAKURAI MIKIO , NOMURA YUKIYASU
IPC分类号： H02K5/173 , H02K5/16
摘要： PURPOSE:To easily perform the disassembling and the interchanging operation of the bearing by uniting the stator frame and the bearing bracket into an integral structure and by making the inner peripheral part of the bearing bracket so that the bearing box can be pulled out in the axial direction after turning the bearing box by certain angles.

10. 发明专利

JPS5251507A DRIP PROOF TYPE REVOLVING ELECTRICAL MACHINE 失效
公开(公告)号：JPS5251507A
公开(公告)日：1977-04-25
申请号：JP12743475
申请日：1975-10-24
申请人： HITACHI LTD
发明人： IKEDA KAZUO , AOYAMA TETSUO , SAKURAI MIKIO , NOMURA MASAYORI
IPC分类号： H02K5/10 , H02K5/18
摘要： PURPOSE:Making the upper part above the axis center of a stator frame a circular arc form and providing ventilation holes on this portion, letting the upper part of the arm attached to the internal peripheral surfaces of a stator frame face to the lower part of the ventilation holes, and performs a drip proof action by the upper part of the arm.

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