Simulation of LSTF Upper Head Break (OECD/NEA ROSA Test 6.1) with TRACE Code. Application to a PWR NPP Model (NUREG/IA-0426)

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Publication Information

Manuscript Completed: December 2013
Date Published: March 2014

Prepared by:
César Queral¹, Juan Gonzalez-Cadelo¹, Gonzalo Jimenez¹,
Ernesto Villalba¹, Julio Perez²

¹Universidad Politécnica de Madrid
Alenza 4. 28003 Madrid.
Spain.

²Consejo de Seguridad Nuclear
Pedro Justo Dorado Dellmans, 11, 28040 Madrid.
Spain.

K. Tien, NRC Project Manager

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

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

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

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Abstract

An analysis of LSTF Upper Head Break experiment (OECD/NEA ROSA test 6.1) has been performed with TRACE code. This test, included within the OECD/NEA ROSA project, attempts to analyze the phenomenology and different accident management actions after the occurrence of a Upper Head break with failure of High Pressure Safety Injection (HPSI). The comparison between the experimental data and the results obtained with TRACE code shows that, in general, the main phenomena are well reproduced.

Additionally, a broad analysis of Upper Head Small Break Loss of Coolant Accident (SBLOCA) with HPSI failed in a Westinghouse PWR has been performed taking into account different accident management actions and conditions in order to check their suitability.

These works has been performed in the framework of OECD/NEA ROSA and CAMP projects.