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Title: TRACE Model for Simulation of Anticipated Transients Without Scram in a BWR

A TRACE model has been developed for using theTRACE/PARCS computational package [1, 2] to simulate anticipated transients without scram (ATWS) events in a boiling water reactor (BWR). The model represents a BWR/5 housed in a Mark II containment. The reactor and the balance of plant systems are modeled in sufficient detail to enable the evaluation of plant responses and theeffectiveness of automatic and operator actions tomitigate this beyond design basis accident.The TRACE model implements features thatfacilitate the simulation of ATWS events initiated by turbine trip and closure of the main steam isolation valves (MSIV). It also incorporates control logic to initiate actions to mitigate the ATWS events, such as water levelcontrol, emergency depressurization, and injection of boron via the standby liquid control system (SLCS). Two different approaches have been used to model boron mixing in the lower plenum of the reactor vessel: modulate coolant flow in the lower plenum by a flow valve, and use control logic to modular.
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Publication Date:
OSTI Identifier:
Report Number(s):
R&D Project: 15451/15830; 401001060
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: 2013 ANS Winter Meeting and Nuclear Technology Expo; Washington, D.C; 20131110 through 20131114
Research Org:
Brookhaven National Laboratory (BNL)
Sponsoring Org:
Country of Publication:
United States
42 ENGINEERING Vessel component; TCV; BWR/5; TRACE/PARCS