TEX-HEU: Integral Experiments with Highly Enriched Uranium and Polyethylene (IER-297 CED-3b Report)

Norris, Jesse; Percher, Catherine; Nelson, Anthony J.; Zywiec, William; Heinrichs, H.

doi:10.2172/1755847

Cited by 1 publication

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“…The TEX-HEU measurements used the Jemima plates with various thicknesses of polyethylene moderators to create a baseline set of critical configurations. 48 By using different thicknesses of polyethylene moderators, the neutron energy spectrum of the experiment changes from fast to thermal, including some mixed or intermediate-energy spectra configurations. The thermal and fast configurations are expected to closely match calculated predictions, as the underlying nuclear data in these areas are extensively measured, with relatively simplistic data structure, and well validated with integral experiments.…”

Section: Ve Thermal/epithermal Experimentsmentioning

confidence: 99%

A New Era of Nuclear Criticality Experiments: The First 10 Years of Comet Operations at NCERC

Thompson

Sanchez

Goda

et al. 2021

Nuclear Science and Engineering

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Comet is a general-purpose, heavy-duty, vertical-lift assembly designed for flexibility in conducting a variety of critical experiments. It is currently located at the National Criticality Experiments Research Center (NCERC) in Nevada. In the past, Comet resided at Technical Area-18 in Los Alamos, New Mexico, as part of the Los Alamos Critical Experiments Facility (LACEF). The Comet assembly was relocated to NCERC in 2008 and became fully operational in June of 2011. The first critical experiment performed on Comet at NCERC was a verification of one of the previous configurations of theZeus experiment series. Over the next 10 years, many additional experiments followed including other Zeus configurations as well as completely new designs. This paper discusses the Comet vertical-lift assembly, the transition from LACEF to NCERC, and a selection of experiments that have been performed on Comet during its first 10 years of operation at NCERC.

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Section: Ve Thermal/epithermal Experimentsmentioning

confidence: 99%