United States Nuclear Regulatory Commission - Protecting People and the Environment

A Summary of the Fire Testing Program at the German HDR Test Facility (NUREG/CR-6173, SAND94-1795)

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Publication Information

Manuscript Completed: September 1995
Date Published:
November 1995

Prepared by:
Steven P. Nowlen
Sandia National Laboratories
P.O. Box 5800
Albuquerque, New Mexico 87185-0737

W. Gleaves, NRC Project Manager

Prepared for:
Division of Engineering Technology
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

NRC Job Code L1330

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Abstract

This report provides an overview of the fire safety experiments performed under the sponsorship of the German government in the containment building of the decommissioned pilot nuclear power plant known as HDR. This structure is a highly complex, multi-compartment, multi-level building which has been used as the test bed for a wide range of nuclear power plant operation safety experiments. These experiments have included numerous fire tests. Test fire fuel sources have included gas burners, wood cribs, oil pools, nozzle release oil fires, and cables in cable trays. A wide range of ventilation conditions including full natural ventilation, full forced ventilation, and combined natural and forced ventilation have been evaluated. During most of the tests the fire products mixed freely with the full containment volume. Macro-scale building circulations patterns which were very sensitive to such factors as ventilation configuration were observed and characterized. Testing also included the evaluation of selective area pressurization schemes as a means of smoke control for emergency access and evacuation stairwells.

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