EXTRAN: A Computer Code for Estimating Concentrations of Toxic Substances at Control Room Air Intakes

Technical Report · Fri Mar 01 04:00:00 EST 1991

DOI:https://doi.org/10.2172/6014413· OSTI ID:6014413

Ramsdell, J. V. ^[1]

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1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

This report presents the NRC staff with a tool for assessing the potential effects of accidental releases of radioactive materials and toxic substances on habitability of nuclear facility control rooms. The tool is a computer code that estimates concentrations at nuclear facility control room air intakes given information about the release and the environmental conditions. The name of the computer code is EXTRAN. EXTRAN combines procedures for estimating the amount of airborne material, a Gaussian puff dispersion model, and the most recent algorithms for estimating diffusion coefficients in building wakes. It is a modular computer code, written in FORTRAN-77, that runs on personal computers. It uses a math coprocessor, if present, but does not require one. Code output may be directed to a printer or disk files.

• Research Organization: US Nuclear Regulatory Commission (NRC), Washington, DC (United States). Office of Nuclear Regulatory Research; Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USNRC; USDOE
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6014413
• Report Number(s): NUREG/CR--5656; PNL--7510; ON: TI91009645
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
540130* -- Environment
Atmospheric-- Radioactive Materials Monitoring & Transport-- (1990-)
97 MATHEMATICS AND COMPUTING
AIR FLOW
AIR POLLUTION
CLOUDS
COMPUTER CODES
COMPUTER PROGRAM DOCUMENTATION
CONTROL ROOMS
DATA
DISTRIBUTION
E CODES
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL TRANSPORT
FLUID FLOW
FORTRAN
GAS FLOW
GASEOUS WASTES
GAUSSIAN PROCESSES
HAZARDS
HEALTH HAZARDS
INDOOR AIR POLLUTION
INFORMATION
LIQUID WASTES
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
NUMERICAL DATA
POLLUTION
PROGRAMMING LANGUAGES
RADIOACTIVE CLOUDS
RADIOACTIVE MATERIALS
SPACE DEPENDENCE
SPATIAL DISTRIBUTION
THEORETICAL DATA
TIME DEPENDENCE
TOXIC MATERIALS
VENTILATION SYSTEMS
WASTES