United States Nuclear Regulatory Commission - Protecting People and the Environment

Result of BETHSY Test 9.1.b Using RELAP5/MOD3 (NUREG/IA-0141)

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Publication Information

Date Published: August 1998

Prepared by:
S. Petelin, B. Mavko, O. Gortnar, I. Ravnikar, G. Cerne

University of Ljubljana
"Jožef Stefan" Institute
Ljubljana, Slovenia

Prepared as part of:
The Agreement on Research Participation and Technical Exchange
under the International Thermal-Hydraulic Code Assessment and Maintenance Program
(CAMP)

Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

Availability Notice

Abstract

RELAP5 computer code was used to simulate an experiment designated 9.1.b, (2" Cold Leg Break without HPSI and with Delayed Ultimate Procedure) performed on BETHSY integral test facility. This test is characterized as beyond design transients scenarios with unavailability of some safety and protection systems. The calculations which have been completed using the computer Sun Sparcstation 20 aim to evidence the difference between experimental and computed data. Generally, an agreement of major transient treads is shown to be obtained in the simulation.

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