Neutronic analysis of the 1D and 1E banks reflux detection system

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Two H Canyon neutron monitoring systems for early detection of postulated abnormal reflux conditions in the Second Uranium Cycle 1E and 1D Mixer-Settle Banks have been designed and built. Monte Carlo neutron transport simulations using the general purpose, general geometry, n-particle MCNP code have been performed to model expected response of the monitoring systems to varying conditions.The confirmatory studies documented herein conclude that the 1E and 1D neutron monitoring systems are able to achieve adequate neutron count rates for various neutron source and detector configurations, thereby eliminating excessive integration count time. Neutron count rate sensitivity studies are also performed. Conversely, ... continued below

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Blanchard, A. December 21, 1999.

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Two H Canyon neutron monitoring systems for early detection of postulated abnormal reflux conditions in the Second Uranium Cycle 1E and 1D Mixer-Settle Banks have been designed and built. Monte Carlo neutron transport simulations using the general purpose, general geometry, n-particle MCNP code have been performed to model expected response of the monitoring systems to varying conditions.The confirmatory studies documented herein conclude that the 1E and 1D neutron monitoring systems are able to achieve adequate neutron count rates for various neutron source and detector configurations, thereby eliminating excessive integration count time. Neutron count rate sensitivity studies are also performed. Conversely, the transport studies concluded that the neutron count rates are statistically insensitive to nitric acid content in the aqueous region and to the transition region length. These studies conclude that the 1E and 1D neutron monitoring systems are able to predict the postulated reflux conditions for all examined perturbations in the neutron source and detector configurations. In the cases examined, the relative change in the neutron count rates due to postulated transitions from normal {sup 235}U concentration levels to reflux levels remain satisfactory detectable.

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Medium: P; Size: vp.

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INIS; OSTI as DE00750127

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  • Other Information: PBD: 21 Dec 1999

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  • Report No.: WSRC-TR--99-00418,Rev.0
  • Grant Number: AC09-96SR18500
  • DOI: 10.2172/750127 | External Link
  • Office of Scientific & Technical Information Report Number: 750127
  • Archival Resource Key: ark:/67531/metadc708446

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  • December 21, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • May 5, 2016, 2:12 p.m.

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Blanchard, A. Neutronic analysis of the 1D and 1E banks reflux detection system, report, December 21, 1999; South Carolina. (digital.library.unt.edu/ark:/67531/metadc708446/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.