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VARSKIN Overview

VARSKIN Overview

RASCAL 5
VARSKIN is used to calculate occupational dose to the skin resulting from exposure to radiation emitted from hot particles or other contamination on or near the skin. These assessments are required by 10 CFR 20.1201(c) in which the assigned shallow dose equivalent is to the part of the body receiving the highest exposure over a contiguous 10 cm2 of skin at a tissue depth of 0.007centimeters (7 mg/cm2).

VARSKIN allows for five different predefined source configuration simulations of point, disk, cylinder, sphere, and slab sources. This current version can also account for air gap and cover materials for photon dosimetry. VARSKIN was updated to better predict beta dosimetry in shallow skin targets. Although the user can choose any dose-averaging area, the default area for skin dose calculations in VARSKIN is 10 square centimeters, to conform to regulatory requirements pursuant to Title 10 of the Code of Federal Regulations, Section 20.1201(c).

VARSKIN 6 updates have added two additional options to the code. First, with a simple check box activated by the user, VARSKIN 6 now gives the user the option to have the code automatically include all decay products in dosimetry calculations or to allow the user to manually add progeny. The second update added the option to calculate skin dose using ICRP 107 nuclide decay data (ICRP 2008). Both ICPR 38 (1983) and ICRP 107 (2008) nuclide libraries are available at the user’s option and contain data on gamma rays, X rays, beta particles, internal conversion electrons, and Auger electrons.