Induced nuclear reactions: processes – systems – and elements – Fission reactor material treatment
Patent
1981-10-15
1985-08-06
Cangialosi, Sal
Induced nuclear reactions: processes, systems, and elements
Fission reactor material treatment
376310, 376314, G21C 1932
Patent
active
045335141
ABSTRACT:
Control rods are inserted into the core of a nuclear reactor in operation to shut down the reactor output. Before completion of entire control rod insertion, a high-temperature coolant flowing in piping for a reactor water clean-up system is sprayed into the space in the upper portion of the reactor vessel. As the space is under negative pressure, oxygen existing in the water droplets of the sprayed coolant is separated. After completion of entire control rod insertion, a residual heat removal system is operated. The spraying operation is discontinued and a low-temperature coolant cooled by a heat exchanger in the residual heat removal system is sprayed into said space. The coolant sprayed by said first spraying operation is not cooled by the heat exchanger in said residual heat removal system.
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Igarashi Hiroo
Mitani Shinji
Ohsumi Katsumi
Takashima Yoshie
Yamamoto Michiyoshi
Cangialosi Sal
Hitachi , Ltd.
Hitachi Engineering Co. Ltd.
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