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21. 发明专利

JPH06160571A REFLECTOR CONTROL TYPE REACTOR 失效
公开(公告)号：JPH06160571A
公开(公告)日：1994-06-07
申请号：JP31155992
申请日：1992-11-20
申请人： TOSHIBA CORP
发明人： KAWASHIMA MASATOSHI , IIDA NORIHIKO
IPC分类号： G21C7/28
摘要： PURPOSE:To surely apply negative reactivity at the time of a low flow without impairing the control capability of a reflector and secure the safety of a reactor and the healthiness of core fuel by dividing the neutron reflector, and arranging gas expansion containers changed with liquid levels of a coolant between them. CONSTITUTION:A reactivity controlling neutron reflector 9 surrounding a core 2 is divided, and low-flow gas expansion containers 30 are arranged between the divided reflectors 9. The reduction of the control capability caused by the division of the reflector 9 is offset when the length of the reflector 9 is increased. The Na level at the time of the 100% output is adjusted by the sealed gas in advance to set the Na liquid levels in the containers 30 above the top section of the core 2 at the time of operation. The dynamic pressure of a coolant Na is reduced and the Na levels in the containers 30 are reduced at the time of a low flow, a radiation leak from the core 2 is increased, the reactivity P of a reactor is surely reduced, the mis-match of the P/F ratio is reduced, and the healthiness of the fuel of the core 2 and the safety of a reactor are secured.

24. 发明专利

JPS52110392A OUTPUT INCREASING DEVICE FOR PRESSURE TUBE TYPE REACTOR 失效
公开(公告)号：JPS52110392A
公开(公告)日：1977-09-16
申请号：JP2613776
申请日：1976-03-12
申请人： HITACHI LTD
发明人： MASUDA HIROYUKI
IPC分类号： G21C7/00 , G21C7/08 , G21C7/28
摘要： PURPOSE:To obtain a device capable of drawing out only the cntrol rod in a high output rising process wherein fuel breakage is a problem, by means of setting up a control rod at the reflecting part in the reactor so as to be able to increase the output by a very small incrsing velocity for th prevention of fuel breakage.

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