CAP 88-PC Version 4.1.1

Estimate dose and risk from emission of radioactive material to the air

an image of a nuclear facility with a translucent radiation symbol in front

CAP88-PC (Clean Air Act Assessment Package - 1988) is a computer code for estimating the dose and risk from emissions of radioactive material to the air. Version 4.1.1 is the most current CAP88-PC and is a regulatory compliance tool under the National Emissions Standard for Hazardous Air Pollutants (NESHAPs), Subpart H. The CAP88–PC program is a well-established and validated code for the purpose of making comprehensive dose and risk assessments. The Gaussian plume model used in CAP88–PC to estimate dispersion in air is one of the most used models for dispersion modeling. CAP 88-PC estimate the average dispersion of radionuclides released from up to six sources, that may be either elevated stacks, such as smokestack, or uniform area sources, such as pile of uranium mill tailings. It produces results that agree with experimental data as well as any model, is fairly easy to work with, and is consistent with the random nature of turbulence.

Risk Estimate Modeling

Dose and risk estimates from CAP88-PC are applicable only to low-level chronic exposures, because the health effects and dosimetric data are based on low-level chronic intakes. CAP88-PC should not be used for either short-term or high-level radionuclide intakes.