Evaluation of ECCS performance for an SBWR
A simplified boiling water reactor (SBWR), one of the next generation of light water reactors, is now under development. From the safety viewpoint, the SBWR is characterized by the adoption of a passive emergency core cooling system (ECCS) and a passive containment cooling system (PCCS). The ECCS network for an SBWR consists of depressurization valves (DPVs) and a gravity-driven cooling system (GDCS). The DPV and GDCS are designed to keep the core covered with water following any loss-of-coolant accident (LOCA) assuming a single failure in the ECCS. The SAPPHIRE code has been developed in order to evaluate the effectiveness of the ECCS of the SBWR. The SAPPHIRE code has been developed to calculate the short-term thermal-hydraulic phenomena simultaneously inside the contaminant including the RPV, drywell, and wetwell. The predictive capability of SAPPHIRE for SBWR LOCA analysis has been demonstrated by a comparison with the best estimate TRAC code. Both SAPPHIRE and TRAC codes indicate no core uncovery during a maximum drain line break.
- OSTI ID:
- 5874511
- Report Number(s):
- CONF-901101--
- Journal Information:
- Transactions of the American Nuclear Society; (USA), Journal Name: Transactions of the American Nuclear Society; (USA) Vol. 62; ISSN TANSA; ISSN 0003-018X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
210100 -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
ACCIDENTS
BWR TYPE REACTORS
COMPUTER CODES
COMPUTERIZED SIMULATION
CONTAINERS
CONTAINMENT
CONTAINMENT SYSTEMS
DEPRESSURIZATION
DESIGN
DRAINAGE
ECCS
ENERGY TRANSFER
ENGINEERED SAFETY SYSTEMS
FLUID MECHANICS
HEAT TRANSFER
HYDRAULICS
LOSS OF COOLANT
MECHANICS
PASSIVITY
PERFORMANCE
PRESSURE VESSELS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR CORES
REACTOR PROTECTION SYSTEMS
REACTOR SAFETY
REACTORS
S CODES
SAFETY
SIMULATION
T CODES
WATER COOLED REACTORS
WATER MODERATED REACTORS