Boiling water reactor and its operating method

Details Boiling water reactor and its operating method Boiling water reactor and its operating method

1996-07-22

1999-04-06

Jordan, Charles

Induced nuclear reactions: processes, systems, and elements

Reactor protection or damage prevention

Corrosion or damage prevention

376305, G21D 100, G21D 308

Patent

active

058928057

ABSTRACT:
A reactor water clean-up system is provided with a first filter demineralizer having a filter resin containing an alkali substance and a second filter demineralizer with a filter resin not containing an alkali substance. The reactor water is supplied to the first filter demineralizer during the term from the starting operation of the preoperating test of the nuclear reactor and of each fuel cycle to 2000 EFPH. The alkali substance contained in the filter resin is guided into the nuclear reactor to change the pH of the reactor water in the nuclear reactor to the weak alkali side. The Cr quantity which is taken in the oxide film of the fuel cladding tube surface is reduced. After 2000 EFPH from the starting operation, the supply of the reactor water to the first filter demineralizer is stopped, and then, the reactor water is supplied to the second filter demineralizer.

REFERENCES:
patent: 4940564 (1990-07-01), Aizawa et al.
patent: 5398269 (1995-03-01), Nagase et al.

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