To provide a scram valve of a water pressure control unit having satisfactory assembly workability of the scram valve, reliably preventing plastic deformation of a valve seat mechanism before it happens, and easily and efficiently performing repair/maintenance operations.
The scram valve 14 of the water pressure control unit includes: a valve box 46 of a two-division structure in which an upper valve box 47 and a lower valve box 48 are integrally coupled; and the valve seat mechanism 52 held by being housed in the valve box 46. The valve seat mechanism 52 is constructed by laminating a seat presser 55, a valve seat 53, and a seat receiver 54 in a sandwich structure, wherein an outer circumferential sleeve is integrated with or integrally provided with the seat presser 55 or the seat receiver 54. The upper and lower surfaces of the outer circumferential sleeve are brought into contact with the lower surface of the upper valve box 47 and the upper surface of the lower valve box 48 on metal touch so as to be held therebetween.
| JPS60225091 | CONTROL ROD |
| JPS5836319 | [Title of the Invention] Control rod drive |
KAWAGOE KAZUHIRO
TOKUYAMA TATSUTOSHI
YANASE GORO
| JPH0942489A | 1997-02-14 | |||
| JPH02182854A | 1990-07-17 | |||
| JP2002181980A | 2002-06-26 | |||
| JPS60100089A | 1985-06-03 | |||
| JPS6056290A | 1985-04-01 | |||
| JPH0942489A | 1997-02-14 | |||
| JPH02182854A | 1990-07-17 | |||
| JP2002181980A | 2002-06-26 |
Shunguchi Sekiguchi
Akio Saruwatari
Osamu Kawamura