Shielding calculations and verifications for the new Radiation Instrument Calibration Facility at Los Alamos National Laboratory

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Description

MCNP-4C1 was used to perform the shielding design for the new Central Health Physics Calibration Facility (CHPCF) at Los Alamos National Laboratory (LANL). The problem of shielding the facility was subdivided into three separate components: (1) Transmission; (2) Skyshine; and (3) Maze Streaming/ Transmission. When possible, actual measurements were taken to verify calculation results. The comparison of calculation versus measurement results shows excellent agreement for neutron calculations. For photon comparisons, calculations resulted in conservative estimates of the Effective Dose Equivalent (EDE) compared to measured results. This disagreement in the photon measurements versus calculations is most likely due to several conservative ... continued below

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6 p.

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George, G. L. (Gerald L.); Olsher, R. H. (Richard H.) & Seagraves, D. T. (David T.) January 1, 2002.

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Description

MCNP-4C1 was used to perform the shielding design for the new Central Health Physics Calibration Facility (CHPCF) at Los Alamos National Laboratory (LANL). The problem of shielding the facility was subdivided into three separate components: (1) Transmission; (2) Skyshine; and (3) Maze Streaming/ Transmission. When possible, actual measurements were taken to verify calculation results. The comparison of calculation versus measurement results shows excellent agreement for neutron calculations. For photon comparisons, calculations resulted in conservative estimates of the Effective Dose Equivalent (EDE) compared to measured results. This disagreement in the photon measurements versus calculations is most likely due to several conservative assumptions regarding shield density and composition. For example, reinforcing steel bars (Rebar) in the concrete shield walls were not included in the shield model.

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6 p.

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  • "Submitted to: American Nuclear Society, 12 Biennial RPSD Topical Meeting, April 14-18, 2002, Santa Fe, NM"

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  • Report No.: LA-UR-02-0516
  • Report No.: LA-UR-02-516
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975990
  • Archival Resource Key: ark:/67531/metadc928190

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  • January 1, 2002

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 4:48 p.m.

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George, G. L. (Gerald L.); Olsher, R. H. (Richard H.) & Seagraves, D. T. (David T.). Shielding calculations and verifications for the new Radiation Instrument Calibration Facility at Los Alamos National Laboratory, article, January 1, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc928190/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.