专利名称：EMERGENCY CORE COOLING SYSTEM 发明人：ITOYA KIYOHIRO,HAMAZAKI RYOICHI 申请号：JP1728589
申请日：19890126
公开号：JPH02222876A
公开日：
19900905reactor pressure中文
专利内容由知识产权出版社提供
摘要：PURPOSE:To cool down a reactor core efficiently by detecting reduction of the quantity of a coolant in a tank out of a plurality of tanks which starts first injection of the coolant into a reactor pressure vessel, by operating a valve mechanism of another tank on the basis of this detection and by injecting the coolant continuously in this way. CONSTITUTION:In the case when a breakdown of a large diameter takes place, first a check valve 7 is opened by a signal of the fall of a level inside a reactor pressure vessel 1, and cooling water in a high-pressure tank 3 is injected thereby into the vessel 1 to cool down a reactor core 2. When the level in the tank 3 lowers and a level fall signal 8a is delivered from a level sensor 8, a check valve 10 is opened by a control device 9 to which this signal 8a and an open signal 7a of the valve 7 are inputted, and the cooling water in a medium-pressure tank 4 is thereby made to flow into the vessel 1 to cool down the core 2. When a breakdown of a small diameter occurs, a pressure in the vessel 1 is kept high and the level in a reactor lowers. By a signal of this lowering of the level, an automatic pressure-reducing device is made to operate, while the valve 7 is opened. Thereafter the pressure in the vessel 1 lowers and the valve 10 is opened by the signals 8a and 7a in the same way as in the case of the breakdown of the large diameter.
申请人：TOSHIBA CORP
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