TY - JOUR
T1 - The impact of radiolytic yield on the calculated ECP in PWR primary coolant circuits
AU - Urquidi-Macdonald, Mirna
AU - Pitt, Jonathan
AU - Macdonald, Digby D.
N1 - Funding Information:
The authors gratefully acknowledge the support of this work by the US Department of Energy through the Nuclear Energy Education Research (NEER) program via Grant No. DE-FG07-02ID14334.
PY - 2007/5/15
Y1 - 2007/5/15
N2 - A code, PWR-ECP, comprising chemistry, radiolysis, and mixed potential models has been developed to calculate radiolytic species concentrations and the corrosion potential of structural components at closely spaced points around the primary coolant circuits of pressurized water reactors (PWRs). The pH(T) of the coolant is calculated at each point of the primary-loop using a chemistry model for the B(OH)3 + LiOH system. Although the chemistry/radiolysis/mixed potential code has the ability to calculate the transient reactor response, only the reactor steady state condition (normal operation) is discussed in this paper. The radiolysis model is a modified version of the code previously developed by Macdonald and coworkers to model the radiochemistry and corrosion properties of boiling water reactor primary coolant circuits. In the present work, the PWR-ECP code is used to explore the sensitivity of the calculated electrochemical corrosion potential (ECP) to the set of radiolytic yield data adopted; in this case, one set had been developed from ambient temperature experiments and another set reported elevated temperatures data. The calculations show that the calculated ECP is sensitive to the adopted values for the radiolytic yields.
AB - A code, PWR-ECP, comprising chemistry, radiolysis, and mixed potential models has been developed to calculate radiolytic species concentrations and the corrosion potential of structural components at closely spaced points around the primary coolant circuits of pressurized water reactors (PWRs). The pH(T) of the coolant is calculated at each point of the primary-loop using a chemistry model for the B(OH)3 + LiOH system. Although the chemistry/radiolysis/mixed potential code has the ability to calculate the transient reactor response, only the reactor steady state condition (normal operation) is discussed in this paper. The radiolysis model is a modified version of the code previously developed by Macdonald and coworkers to model the radiochemistry and corrosion properties of boiling water reactor primary coolant circuits. In the present work, the PWR-ECP code is used to explore the sensitivity of the calculated electrochemical corrosion potential (ECP) to the set of radiolytic yield data adopted; in this case, one set had been developed from ambient temperature experiments and another set reported elevated temperatures data. The calculations show that the calculated ECP is sensitive to the adopted values for the radiolytic yields.
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U2 - 10.1016/j.jnucmat.2006.10.012
DO - 10.1016/j.jnucmat.2006.10.012
M3 - Article
AN - SCOPUS:34247162796
SN - 0022-3115
VL - 362
SP - 1
EP - 13
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1
ER -