Using containment analysis to improve component cooling water heat exchanger limits
- TUElectric, Dallas, TX (United States)
The Comanche Peak Steam Electric Station design requires that exit temperatures from the Component Cooling Water Heat Exchanger remain below 330.37 K during the Emergency Core Cooling System recirculation stage, following a hypothetical Loss of Coolant Accident (LOCA). Due to measurements indicating a higher than expected combination of: (a) high fouling factor in the Component Cooling Water Heat Exchanger with (b) high ultimate heat sink temperatures, that might lead to temperatures in excess of the 330.37 K limit, if a LOCA were to occur, TUElectric adjusted key flow rates in the Component Cooling Water network. This solution could only be implemented with improvements to the containment analysis methodology of record. The new method builds upon the CONTEMPT-LT/028 code by: (a) coupling the long term post-LOCA thermohydraulics with a more detailed analytical model for the complex Component Cooling Water Heat Exchanger network and (b) changing the way mass and energy releases are calculated after core reflood and steam generator energy is dumped to the containment. In addition, a simple code to calculate normal cooldowns was developed to confirm RHR design bases were met with the improved limits.
- OSTI ID:
- 400857
- Report Number(s):
- CONF-950828-; TRN: 96:030287
- Resource Relation:
- Conference: 1995 National heat transfer conference, Portland, OR (United States), 5-9 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of Heat transfer -- Portland 1995; El-Genk, M.S. [ed.] [Univ. of New Mexico, Albuquerque, NM (United States)]; PB: 378 p.; AIChE Symposium Series, Volume 91, Number 306
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS
COMANCHE PEAK-1 REACTOR
RCIC SYSTEMS
COMANCHE PEAK-2 REACTOR
HEAT EXCHANGERS
THERMAL ANALYSIS
COMPUTERIZED SIMULATION
LOSS OF COOLANT
C CODES
RHR SYSTEMS
LIMITING VALUES
FLOW RATE
MODIFICATIONS
THERMODYNAMICS
HYDRODYNAMICS