Effect of compositional variation in plutonium on process shielding design

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Radiation dose rate from plutonium with high {sup 239}Pu content varies with initial nuclidic content, radioactive decay time, and impurity elemental content. The two idealized states of old plutonium and clean plutonium, whose initial compositions are given, provide approximate upper and lower bounds on dose rate variation. Whole-body dose rates were calculated for the two composition states, using unshielded and shielded plutonium spheres of varying density. The dose rates from these variable density spheres are similar to those from expanded plutonium configurations encountered during processing. The dose location of 40 cm from the sphere center is representative of operator standoff ... continued below

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8 p.

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Brown, T.H. November 1, 1997.

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Radiation dose rate from plutonium with high {sup 239}Pu content varies with initial nuclidic content, radioactive decay time, and impurity elemental content. The two idealized states of old plutonium and clean plutonium, whose initial compositions are given, provide approximate upper and lower bounds on dose rate variation. Whole-body dose rates were calculated for the two composition states, using unshielded and shielded plutonium spheres of varying density. The dose rates from these variable density spheres are similar to those from expanded plutonium configurations encountered during processing. The dose location of 40 cm from the sphere center is representative of operator standoff for direct handling of plutonium inside a glove box. The results have shielding implications for glove boxes with only structurally inherent shielding, especially for processing of old plutonium in an expanded configuration. Further reduction in total dose rate by using lead to reduce photon dose rate is shown for two density cases representing compact and expanded plutonium configurations.

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8 p.

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INIS; OSTI as DE97009138

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  • 1997 American Nuclear Society (ANS) winter meeting, Albuquerque, NM (United States), 16-20 Nov 1997

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  • Other: DE97009138
  • Report No.: LA-UR--97-2546
  • Report No.: CONF-971125--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 292847
  • Archival Resource Key: ark:/67531/metadc682266

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  • November 1, 1997

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 25, 2016, 4:11 p.m.

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Brown, T.H. Effect of compositional variation in plutonium on process shielding design, article, November 1, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc682266/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.