United States Nuclear Regulatory Commission - Protecting People and the Environment

Nuclear Power Plant Fire Protection - Ventilation (Subsystems Study Task 1) (NUREG/CR-0636)

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Publication Information

Date Published: September 1979

Prepared by:
John A. Milloy

Sandia Laboratories
Albuquerque, New Mexico 87185
operated by Sandia Corporation
for the U.S. Department of Energy

NRC FIN A-1080

Prepared for:
Engineering Methodology Standards Branch
Office of Standards Development
U.S. Nuclear Regulatory Commission
Washington, DC 20555

Under Interagency Agreement DOE 40-50-75

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Abstract

This report examines the role of compartment ventilation from the standpoint of nuclear power plant fire protection safety. Based on a review of numerous design standards which consider the influence of controlled ventilation on reducing fire severity, the report concludes that current standards and regulatory guidelines inadequately define criteria for design of ventilation systems and their operation under fire emergencies. To resolve this deficiency, the report evaluates four candidate design bases for ventilation systems: smoke removal, smoke dispersion control, fire spread control, and fire temperature control. It is concluded that the lack of existing fire technology precludes the implementation of all but one of these criteria--fire temperature control. On this basis the report presents an example design calculation for applying the temperature control criterion.

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