EXPAC (EXPlosion Analysis Code) user's manual: A computer code for analyzing explosion-induced flow and material transport in nuclear facilities

Technical Report · Sun Jul 01 04:00:00 EDT 1990

DOI:https://doi.org/10.2172/6995574· OSTI ID:6995574

Gregory, W S; Nichols, B D

This user's manual supports the EXPAC computer code, which can predict explosion-induced flows, pressures, and material transport within structures. The code can analyze any arbitrarily interconnected network of building rooms and ventilation systems. EXPAC is part of a family of computer codes that is designed to provide improved methods of safety analysis for the nuclear industry. The EXPAC code structure is based on the TVENT code, but the numerical solution scheme is quite different and is designed to handle very rapid gas transients. A lumped-parameter formulation is used that includes the effects of inertia and choking. This version of the EXPAC code is particularly suitable for calculating the detailed effects of explosions in the far field by using a parametric representation of the explosive event. A very basic material transport capability is included that models the effects of convection, depletion, entrainment, and filtration of material. The effect of clogged filter systems on the gas dynamics also is taken into account. The code input and several sample problems that illustrate EXPAC's capabilities are included. 53 refs., 50 figs., 2 tabs.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: DOD
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6995574
• Report Number(s): LA-11823-M; ON: DE90012704
• Country of Publication: United States
• Language: English

Related Subjects

054000* -- Nuclear Fuels-- Health & Safety
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ACCIDENTS
AEROSOLS
BLOWERS
BUILDINGS
CHEMICAL REACTIONS
COLLOIDS
COMPUTER CODES
COMPUTERIZED SIMULATION
DISPERSIONS
DOCUMENT TYPES
E CODES
EXPLOSIONS
FILTERS
FLOW MODELS
FORTRAN
HAZARDS
HEALTH HAZARDS
MANUALS
MASS TRANSFER
MATHEMATICAL MODELS
NUCLEAR FACILITIES
PROGRAMMING LANGUAGES
RADIATION HAZARDS
SIMULATION
SOLS
T CODES
TRANSIENTS
VENTILATION SYSTEMS