United States Nuclear Regulatory Commission - Protecting People and the Environment

Cofrentes NPP (BWR/6) ATWS (MSIVC) Analysis with TRAC-BF1: 1D vs. Point Kinetics and Containment Response (NUREG/IA-0178)

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Publication Information

Date Published: March 2000

Prepared by:
A. Escrivá, M.D. Bovea, G. Verdú, J. L. Muñoz Cobo, UPV,
F. Castrillo, ID

Universidad Politecnica de Valencia (UPV)
Departmento de Ingenieria Quimica y Nuclear
Camino de Vera 14
46021 VALENCIA
SPAIN

IBRDROLA (ID)
Hermosilla, 3
28001 MADRID
SPAIN

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

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

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Abstract

Anticipated transient without scram (ATWS) are considered as events which might produce a severe accident in a boiling water reactor (BWR). It has been selected the most unfavourable of the different scenarios that could lead to an ATWS accident: an inadvertent closure of the main steam isolation valves (MSIVs).

To mitigate this accident, a borated water solution is injected. This action is an alternative way to shutdown the reactor quickly and effectively. This event has been analyzed using the TRAC-BF1 computer program.

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