TRAC-PF1/MOD1 predictions of a noncondensible gas on pressurizer insurge transients
The pressurizer response to pressurized water reactor transients plays an important role in determining the pressure history of the primary coolant system. In accidents, nitrogen gas can be discharged into the reactor system from the accumulator and flooding tanks after the water inventory is depleted. The presence of the noncondensible gases has a significant effect on pressurizer response. The purpose of this study is to simulate the Massachusetts Institute of Technology (MIT) pressurizer insurge transients in which the vapor region contains steam mixed with nitrogen using the TRAC-PF1/MOD1 thermal-hydraulic computer code. The predicted peak pressurizer pressure results are in good agreement with the data for various noncondensible mass fractions. The calculations show higher pressures with adiabatic vessel wall (no heat loss) during insurges; however, reasonable agreement with the measurements is obtained when the heat loss from the vessel wall is taken into account.
- Research Organization:
- Babcock and Wilcox, Lynchburg, VA
- OSTI ID:
- 6883218
- Report Number(s):
- CONF-860610-
- Journal Information:
- Trans. Am. Nucl. Soc.; (United States), Journal Name: Trans. Am. Nucl. Soc.; (United States) Vol. 52; ISSN TANSA
- Country of Publication:
- United States
- Language:
- English
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