Method of operating nuclear power plant, nuclear power plant, and method of controlling water chemistry of nuclear power plant
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United States of America Patent
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Aug 12, 2003
Grant Date -
Feb 21, 2002
app pub date -
Apr 23, 2001
filing date -
Apr 24, 2000
priority date (Note) -
Expired
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Abstract
In a nuclear power plant, by injecting an amount of hydrogen small enough not to increase a radiation dose rate of the main steam system, ECP of metallic component materials composing a nuclear reactor can be decreased to suppress the potential of occurrence of IGSCC, and the control can be easily performed, and the operating cost can be suppressed to increase. Occurrence of intergranular stress corrosion cracking in metallic component materials in contact with reactor cooling water is suppressed by injecting zirconium hydroxide and hydrogen into the reactor cooling water to decrease the electrochemical corrosion potential of the metallic component materials.
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