title: Comparison of U.S. Environmental Protection Agency's CAP88 PC Versions 3.0 and 4.0.
abstract: The Savannah River National Laboratory (SRNL) with the assistance of Georgia Regents University, completed a comparison of the U.S. Environmental Protection Agency's (U.S. EPA) environmental dosimetry code CAP88 PC V3.0 with the recently developed V4.0. CAP88 is a set of computer programs and databases used for estimation of dose and risk from radionuclide emissions to air. At the U.S. Department of Energy's Savannah River Site, CAP88 is used by SRNL for determining compliance with U.S. EPA's National Emission Standards for Hazardous Air Pollutants (40 CFR 61, Subpart H) regulations. Using standardized input parameters, individual runs were conducted for each radionuclide within its corresponding database. Some radioactive decay constants, human usage parameters, and dose coefficients changed between the two versions, directly causing a proportional change in the total effective dose. A detailed summary for select radionuclides of concern at the Savannah River Site (60Co, 137Cs, 3H, 129I, 239Pu, and 90Sr) is provided. In general, the total effective doses will decrease for alpha/beta emitters because of reduced inhalation and ingestion rates in V4.0. However, for gamma emitters, such as 60Co and 137Cs, the total effective doses will increase because of changes U.S. EPA made in the external ground shine calculations.
authors.affiliation: *Savannah River National Laboratory, Savannah River Nuclear Solutions, Savannah River Site, Aiken, SC; †Kennesaw State University, Nuclear Engineering, 1100 S Marietta Parkway, Marietta, GA; ‡Georgia Regents University, Department of Chemistry and Physics, 1120 15th Street, Augusta, GA.
authors.forename: Tim
authors.initials: T
authors.lastname: Jannik
authors.forename: Eduardo B
authors.initials: EB
authors.lastname: Farfan
authors.forename: Ken
authors.initials: K
authors.lastname: Dixon
authors.forename: Joseph
authors.initials: J
authors.lastname: Newton
authors.forename: Christopher
authors.initials: C
authors.lastname: Sailors
authors.forename: Levi
authors.initials: L
authors.lastname: Johnson
authors.forename: Kelsey
authors.initials: K
authors.lastname: Moore
authors.forename: Richard
authors.initials: R
authors.lastname: Stahman
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D005845:Georgia; D009688:Nuclear Reactors; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods*; D011868:Radioisotopes / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012984:Software; D012986:Software Validation; D014481:United States; D014484:United States Environmental Protection Agency
chemical_list: D000396:Air Pollutants, Radioactive; D011868:Radioisotopes