Steam generator secondary pH during a steam generator tube rupture
- Idaho National Engineering Lab., Idaho Falls (United States)
The iodine concentration in the steam generator secondary vapor must be determined in order to estimate the environmental consequences (i.e., iodine source term to the environment) due to a steam generator tube rupture (SGTR). Experimental evidence indicates that this concentration is sensitive to the liquid-phase pH. A thermodynamic-based calculational approach was used to model the pH during a design-bases SGTR. The EQUILIBRIUM code within the Facility for Analysis of Chemical Thermodynamics was assessed for calculation of pH by comparison with measured pH's in operating pressurized water reactors (PWRs). The pH was calculated for ten generic PWR designs (one Babcock and Wilcox, three Combustion Engineering, and six Westinghouse). The calculated pH was shown to be relatively insensitive to PWR design. The pH for all designs equilibrated to a value of [approximately] 6.5.
- OSTI ID:
- 6480227
- Journal Information:
- Nuclear Technology; (United States), Journal Name: Nuclear Technology; (United States) Vol. 102:3; ISSN 0029-5450; ISSN NUTYBB
- Country of Publication:
- United States
- Language:
- English
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Steam generator secondary pH during a steam generator tube rupture
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ACCIDENTS
BOILERS
COMPUTER CODES
COOLING SYSTEMS
DESIGN BASIS ACCIDENTS
E CODES
ECOLOGICAL CONCENTRATION
ELEMENTS
ENRICHED URANIUM REACTORS
FAILURES
FISSION PRODUCT RELEASE
HALOGENS
IODINE
NONMETALS
PH VALUE
POWER REACTORS
PWR TYPE REACTORS
RADIOACTIVITY TRANSPORT
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTOR SAFETY
REACTORS
RUPTURES
SAFETY
SECONDARY COOLANT CIRCUITS
STEAM GENERATORS
THERMAL REACTORS
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS