Apparatus and method for limiting and analyzing stress corrosion cracking in pressurized water reactors
First Claim
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1. A method to evaluate an effect of applying a zinc compound to a reactor coolant system of a pressurized water reactor, comprising:
- quantitatively assessing a pressurized water reactor stress corrosion cracking initiation rate of a candidate system through analysis of operational eddy current testing data and pressurized water stress corrosion cracking failure history using empirical relationships;
determining an extent of damage to the candidate system;
approximating when zinc addition to the system will mitigate pressurized water stress corrosion cracking;
quantitatively assessing pressurized water stress corrosion cracking initiation benefit for high-concentration (≧
10 ppb) and low-concentration (<
10 ppb) zinc addition programs; and
calculating a pressurized water reactor stress corrosion cracking initiation benefit from zinc addition at low concentrations (<
10 ppb) in the reactor coolant system.
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Abstract
A method to assess and predict pressurized water stress corrosion cracking in operational nuclear power plants and the effect of adding zinc compounds into a reactor coolant system of the nuclear power plant.
1 Citation
10 Claims
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1. A method to evaluate an effect of applying a zinc compound to a reactor coolant system of a pressurized water reactor, comprising:
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quantitatively assessing a pressurized water reactor stress corrosion cracking initiation rate of a candidate system through analysis of operational eddy current testing data and pressurized water stress corrosion cracking failure history using empirical relationships; determining an extent of damage to the candidate system; approximating when zinc addition to the system will mitigate pressurized water stress corrosion cracking; quantitatively assessing pressurized water stress corrosion cracking initiation benefit for high-concentration (≧
10 ppb) and low-concentration (<
10 ppb) zinc addition programs; andcalculating a pressurized water reactor stress corrosion cracking initiation benefit from zinc addition at low concentrations (<
10 ppb) in the reactor coolant system. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10)
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3. (canceled)
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