Effects of radioactive hot particles on pig skin

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The purpose of these studies was to determine the incidence and severity of lesions resulting from very localized deposition of dose to skin from small (< 0.5 mm) discrete radioactive particles as produced in the work environments of nuclear reactors. Hanford mini-pigs were exposed, both on a slightly off the skin, to localized replicate doses from 0.31 to 64 Gy (averaged over 1 cm{sup 2} at 70 {mu}m depth unless noted otherwise) using Sc-46, Yb-175, Tm-170, and fissioned UC{sub 2} isotopes having maximum beta-particle energies from about 0.3 to 3 MeV. Erythema and scabs (indicating ulceration) were scored for up ... continued below

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314 p.

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Kaurin, D. G.; Baum, J. W. & Schaefer, C. W. June 1997.

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Description

The purpose of these studies was to determine the incidence and severity of lesions resulting from very localized deposition of dose to skin from small (< 0.5 mm) discrete radioactive particles as produced in the work environments of nuclear reactors. Hanford mini-pigs were exposed, both on a slightly off the skin, to localized replicate doses from 0.31 to 64 Gy (averaged over 1 cm{sup 2} at 70 {mu}m depth unless noted otherwise) using Sc-46, Yb-175, Tm-170, and fissioned UC{sub 2} isotopes having maximum beta-particle energies from about 0.3 to 3 MeV. Erythema and scabs (indicating ulceration) were scored for up to 71 days post-irradiation. The responses followed normal cumulative probability distributions, and therefore, no true threshold could be defined. Hence, 10 and 50% scab incidence rates were deduced using probit analyses. The lowest dose which produced 10% incidence was about 1 Gy for Yb-175 (0.5 MeV maximum energy) beta particle exposures, and about 3 to 9 Gy for other isotopes. The histopathology of lesions was determined at several doses. Single exposures to doses as large as 1,790 Gy were also given, and results were observed for up to 144 days post-exposure. Severity of detriment was estimated by analyzing the results in terms of lesion diameter, persistence, and infection. Over 1,100 sites were exposed. Only two exposed sites became infected after doses near 5000 Gy; the lesions healed quickly on treatment. 105 refs., 145 figs., 47 tabs.

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314 p.

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INIS; OSTI as TI98000162

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  • Other Information: PBD: Jun 1997

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  • Other: TI98000162
  • Report No.: NUREG/CR--6531
  • Report No.: BNL-NUREG--52499
  • Grant Number: AC02-76CH00016
  • DOI: 10.2172/534480 | External Link
  • Office of Scientific & Technical Information Report Number: 534480
  • Archival Resource Key: ark:/67531/metadc697540

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  • June 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 22, 2016, 6:27 p.m.

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Kaurin, D. G.; Baum, J. W. & Schaefer, C. W. Effects of radioactive hot particles on pig skin, report, June 1997; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc697540/: accessed January 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.