United States Nuclear Regulatory Commission - Protecting People and the Environment

Assessment and Application of Blackout Transients at Asco Nuclear Power Plant with RELAP5/MOD2 (NUREG/IA-0119, ICSP–AS–BOUT–R)

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Publication Information

Date Published: June 1993

Prepared by:
F. Reventos, J. S. Baptista, A. P. Navas, P. Moreno

Asociacion Nuclear Asco
C/ Tres Torres, 7
08017 - Barcelona
Spain

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

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

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Abstract

The Asociación Nuclear Ascó has prepared a model of Ascó NPP using RELAP5/MOD2. This model, which include thermalhydraulics, kinetics and protection and controls, has been qualified in previous calculations of several actual plant transients.

The first part of the transient presented in this report is an actual blackout and one of the transients of the qualification process. The results are in agreeennt with plant data.

The second part of the transient is a hypothetical case. It consists in re-starting a prinary pump and assume a new black-out.

The phenacenology prediction of this second part has been useful from the operation and safety point of view.

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