Method of stress corrosion cracking mitigating for nuclear...

Details Method of stress corrosion cracking mitigating for nuclear... Method of stress corrosion cracking mitigating for nuclear...

2011-01-11

2011-01-11

Palabrica, Rick (Department: 3663)

Induced nuclear reactions: processes, systems, and elements

Reactor protection or damage prevention

Corrosion or damage prevention

C376S306000

Reexamination Certificate

active

07869557

ABSTRACT:
The object of this invention is to provide a method for mitigating a stress corrosion cracking of reactor structural material which makes it possible to suppress the rise in the main steam line dose rate without secondary effects such as a rise in the concentration of radioactive cobalt-60, etc. in the reactor water. Hydrogen and a reductive nitrogen compound containing nitrogen having a negative oxidation number (for example, hydrazine) are injected into the core water of boiling water nuclear power plant. By injecting the reductive nitrogen compound containing nitrogen having a negative oxidation number into the core water, the stress corrosion cracking of structural material of reactor can be mitigated without side reactions such as a rise in the concentration of cobalt-60, etc.

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