Predictions of enhancing hydrogen water chemistry for boiling water reactors by general catalysis and general inhibition
- Inst. of Nuclear Energy Research, Lung-Tan (Taiwan, Province of China). Div. of Nuclear Fuel and Materials
- Pennsylvania State Univ., University Park, PA (United States). Center for Advanced Materials
DAMAGE-PREDICTOR, the computer code with the capability of simultaneously estimating the concentrations of radiolysis species, the electrochemical corrosion potential (ECP), and the crack growth rate of a reference crack in sensitized Type 304 stainless steels, was used to evaluate the responses of Dresden-2 and Duane Arnold boiling water reactors (BWRs) to hydrogen water chemistry (HWC) with the application of general catalysis (increasing the exchange current density) and general inhibition (decreasing the exchange current density). HWC simulations for these two BWRs were carried out for feedwater hydrogen concentrations of 0.0, 0.5, and 1.0 ppm and for exchange current density multipliers of 10{sup {minus}4} (general inhibition) and 10{sup 4} (general catalysis). Species concentrations (H{sub 2}, O{sub 2}, H{sub 2}O{sub 2}, etc.), electrochemical corrosion potential (ECP), and crack growth rate were predicted for the entire heat transport circuits (HTCs) of the two reactors. It is predicted that both techniques are able to greatly improve the effectiveness of HWC for protecting the entire heat transport circuits of Dresden 2 and Duane Arnold. However, while operated under normal water chemistry, both reactors are predicted to become more susceptible to IGSCC because of the elevated ECP resulting from general catalysis. The author emphasizes, however, that this conclusion is tentative because the increase in the exchange current density values for general catalysis have not been experimentally determined.
- OSTI ID:
- 367723
- Report Number(s):
- CONF-960389-; TRN: IM9640%%469
- Resource Relation:
- Conference: National Association of Corrosion Engineers (NACE) annual corrosion conference and exposition: water and waste water industries, Denver, CO (United States), 24-29 Mar 1996; Other Information: PBD: 1996; Related Information: Is Part Of Corrosion/96 conference papers; PB: [6615] p.
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
STAINLESS STEEL-304
CORROSION PROTECTION
CRACK PROPAGATION
DRESDEN-2 REACTOR
REACTOR COOLING SYSTEMS
DUANE ARNOLD-1 REACTOR
FEEDWATER
WATER CHEMISTRY
D CODES
INTERGRANULAR CORROSION
STRESS CORROSION
THEORETICAL DATA
MITIGATION
CHEMICAL COMPOSITION
HYDROGEN
OXYGEN
HYDROGEN PEROXIDE