Toxic Vapor Concentrations in the Control Room Following a Postulated Accidental Release (NUREG-0570)

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Publication Information

Manuscript Completed: May 1979
Date Published: June 1979

Prepared by:
James Wing

Division of Site Safety and Environmental Analysis
Office of Nuclear Reactor Regulation
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001


The report presents an acceptable method for calculating the vapor concentrations in a control room as a function of time after a postulated accidental release. Included are the mathematical formulas for computing the rates of vaporization and evaporation of liquid spills, the vapor dispersion in air, and the control room air exchange. A list of toxic chemicals and their physical properties is also given.

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