Update of the nuclear criticality slide rule calculations: Studies with common shielding materials

T. M. Miller; C. Celik; C. Hopper; M. Duluc; D. Heinrichs; S. Kim; A. Brown; C. Wilson; M. Troisne

Update of the nuclear criticality slide rule calculations: Studies with common shielding materials

T. M. Miller, C. Celik, C. Hopper, M. Duluc, D. Heinrichs, S. Kim, A. Brown, C. Wilson, M. Troisne

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

This paper presents preliminary results from the third phase of the current update to the nuclear criticality slide rule, in which MCNP, MAVRIC/Monaco, and COG have simulated the prompt neutron and photon dose from critical spheres of 4.95% enriched uranyl fluoride solution and 93.2% enriched uranium metal. New to this phase is the inclusion of various thicknesses of lead, steel, concrete, and water shielding. This phase also evaluated the effects of humidity on the unshielded configurations in the first phase, as well as the effects of changing the ground composition used in the first phase from concrete to dry soil. The small sample of results presented show that MCNP, MAVRIC/Monaco, and COG results are statistically the same or different by only a few percent. The impact of the shielding materials depends on their thickness, but doses decreased by nearly a factor of 100 are presented. In a few instances, buildup of gamma doses occurs due to neutron interactions in shielding materials.

Original language	English
Title of host publication	20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018
Publisher	American Nuclear Society
ISBN (Electronic)	9780894487460
State	Published - 2018
Event	20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018 - Santa Fe, United States Duration: Aug 26 2018 → Aug 31 2018

Publication series

Name	20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018

Conference

Conference	20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018
Country/Territory	United States
City	Santa Fe
Period	08/26/18 → 08/31/18

Funding

The contribution to this work by ORNL was funded by the United States Department of Energy Nuclear Criticality Safety Program (NCSP). Notice: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). This work was performed under the auspices of the US Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 and was funded by the US Department of Energy Nuclear Criticality Safety Program.

Funders	Funder number
US Department of Energy
United States Department of Energy
U.S. Department of Energy
Lawrence Livermore National Laboratory	DE-AC52-07NA27344
Oak Ridge National Laboratory

Cite this

Miller, T. M., Celik, C., Hopper, C., Duluc, M., Heinrichs, D., Kim, S., Brown, A., Wilson, C., & Troisne, M. (2018). Update of the nuclear criticality slide rule calculations: Studies with common shielding materials. In 20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018 (20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018). American Nuclear Society.

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title = "Update of the nuclear criticality slide rule calculations: Studies with common shielding materials",

abstract = "This paper presents preliminary results from the third phase of the current update to the nuclear criticality slide rule, in which MCNP, MAVRIC/Monaco, and COG have simulated the prompt neutron and photon dose from critical spheres of 4.95% enriched uranyl fluoride solution and 93.2% enriched uranium metal. New to this phase is the inclusion of various thicknesses of lead, steel, concrete, and water shielding. This phase also evaluated the effects of humidity on the unshielded configurations in the first phase, as well as the effects of changing the ground composition used in the first phase from concrete to dry soil. The small sample of results presented show that MCNP, MAVRIC/Monaco, and COG results are statistically the same or different by only a few percent. The impact of the shielding materials depends on their thickness, but doses decreased by nearly a factor of 100 are presented. In a few instances, buildup of gamma doses occurs due to neutron interactions in shielding materials.",

author = "Miller, {T. M.} and C. Celik and C. Hopper and M. Duluc and D. Heinrichs and S. Kim and A. Brown and C. Wilson and M. Troisne",

note = "Publisher Copyright: {\textcopyright} 2018 American Nuclear Society. All rights reserved.; 20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018 ; Conference date: 26-08-2018 Through 31-08-2018",

year = "2018",

language = "English",

series = "20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018",

publisher = "American Nuclear Society",

booktitle = "20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018",

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Miller, TM , Celik, C, Hopper, C, Duluc, M, Heinrichs, D, Kim, S, Brown, A, Wilson, C & Troisne, M 2018, Update of the nuclear criticality slide rule calculations: Studies with common shielding materials. in 20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018. 20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018, American Nuclear Society, 20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018, Santa Fe, United States, 08/26/18.

Update of the nuclear criticality slide rule calculations: Studies with common shielding materials. / Miller, T. M.; Celik, C.; Hopper, C. et al.
20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018. American Nuclear Society, 2018. (20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Update of the nuclear criticality slide rule calculations

T2 - 20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018

AU - Miller, T. M.

AU - Celik, C.

AU - Hopper, C.

AU - Duluc, M.

AU - Heinrichs, D.

AU - Kim, S.

AU - Brown, A.

AU - Wilson, C.

AU - Troisne, M.

PY - 2018

Y1 - 2018

N2 - This paper presents preliminary results from the third phase of the current update to the nuclear criticality slide rule, in which MCNP, MAVRIC/Monaco, and COG have simulated the prompt neutron and photon dose from critical spheres of 4.95% enriched uranyl fluoride solution and 93.2% enriched uranium metal. New to this phase is the inclusion of various thicknesses of lead, steel, concrete, and water shielding. This phase also evaluated the effects of humidity on the unshielded configurations in the first phase, as well as the effects of changing the ground composition used in the first phase from concrete to dry soil. The small sample of results presented show that MCNP, MAVRIC/Monaco, and COG results are statistically the same or different by only a few percent. The impact of the shielding materials depends on their thickness, but doses decreased by nearly a factor of 100 are presented. In a few instances, buildup of gamma doses occurs due to neutron interactions in shielding materials.

AB - This paper presents preliminary results from the third phase of the current update to the nuclear criticality slide rule, in which MCNP, MAVRIC/Monaco, and COG have simulated the prompt neutron and photon dose from critical spheres of 4.95% enriched uranyl fluoride solution and 93.2% enriched uranium metal. New to this phase is the inclusion of various thicknesses of lead, steel, concrete, and water shielding. This phase also evaluated the effects of humidity on the unshielded configurations in the first phase, as well as the effects of changing the ground composition used in the first phase from concrete to dry soil. The small sample of results presented show that MCNP, MAVRIC/Monaco, and COG results are statistically the same or different by only a few percent. The impact of the shielding materials depends on their thickness, but doses decreased by nearly a factor of 100 are presented. In a few instances, buildup of gamma doses occurs due to neutron interactions in shielding materials.

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M3 - Conference contribution

AN - SCOPUS:85069700320

T3 - 20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018

BT - 20th Topical Meeting of the Radiation Protection and Shielding Division, RPSD 2018

PB - American Nuclear Society

Y2 - 26 August 2018 through 31 August 2018

ER -

Update of the nuclear criticality slide rule calculations: Studies with common shielding materials

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