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Fire simulation in nuclear facilities: the FIRAC code and supporting experiments

Conference ·
OSTI ID:6549584
; ; ;
The fire accident analysis computer code FIRAC was designed to estimate radioactive and nonradioactive source terms and predict fire-induced flows and thermal and material transport within the ventilation systems of nuclear fuel cycle facilities. FIRAC maintains its basic structure and features and has been expanded and modified to include the capabilities of the zone-type compartment fire model computer code FIRIN developed by Battelle Pacific Northwest Laboratory. The two codes have been coupled to provide an improved simulation of a fire-induced transient within a facility. The basic material transport capability of FIRAC has been retained and includes estimates of entrainment, convection, deposition, and filtration of material. The interrelated effects of filter plugging, heat transfer, gas dynamics, material transport, and fire and radioactive source terms also can be simulated. Also, a sample calculation has been performed to illustrate some of the capabilities of the code and how a typical facility is modeled with FIRAC. In addition to the analytical work being performed at Los Alamos, experiments are being conducted at the New Mexico State University to support the FIRAC computer code development and verification. This paper summarizes two areas of the experimental work that support the material transport capabiities of the code: the plugging of high-efficiency particulate air (HEPA) filters by combustion aerosols and the transport and deposition of smoke in ventilation system ductwork.
Research Organization:
Los Alamos National Lab., NM (USA); New Mexico State Univ., Las Cruces (USA)
DOE Contract Number:
W-7405-ENG-36
OSTI ID:
6549584
Report Number(s):
LA-UR-84-2479; CONF-840806-8; ON: DE84016485
Country of Publication:
United States
Language:
English

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Related Subjects

054000* -- Nuclear Fuels-- Health & Safety
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
AEROSOLS
AIR FILTERS
COLLOIDS
COMBUSTION PRODUCTS
COMPUTER CODES
COMPUTERIZED SIMULATION
DISPERSIONS
DUCTS
ENERGY TRANSFER
EQUIPMENT
F CODES
FILTERS
FIRES
FUEL CYCLE
HEAT TRANSFER
NUCLEAR FACILITIES
PLUGGING
POLLUTION CONTROL EQUIPMENT
RESIDUES
SIMULATION
SMOKES
SOLS
VENTILATION SYSTEMS