Cook, J.
, Majkrzak, C.
and King, H.
(2024),
Pre-conceptual Design Activities of the NIST Neutron Source: Simulations of Neutron Beam Characteristics of the Proposed NIST Neutron Source, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.TN.2284, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=956977
(Accessed December 3, 2024)
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Pre-conceptual Design Activities of the NIST Neutron Source: Simulations of Neutron Beam Characteristics of the Proposed NIST Neutron Source
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Abstract
This technical note is part of a series of notes describing preliminary analyses and planning for the pre-conceptual design of a reactor to replace, in due course, the National Bureau of Standards Reactor (NBSR) at the NIST Center for Neutron Research. The replacement reactor, namely the NIST Neutron Source (NNS), is currently planned to be a 20 Megawatts thermal power, pool-type compact core, cooled and moderated by light water (H2O) and fueled with low-enriched U-10Mo. The core comprises nine fuel assemblies in a three-by-three square lattice encased in a chimney. It is surrounded by a heavy water (D2O) filled reflector tank that contains two liquid deuterium (LD2) cold neutron sources on opposite sides of the core. The report outlines preliminary studies undertaken to assess the thermal and cold neutron beam performance of a pre-conceptual design of the NNS. The results demonstrate the possibility and feasibility of significant performance enhancements of the NNS for a similar scale reactor core that builds on experience with the NBSR design. Further improvements and optimizations will be explored later as the NNS design evolves.Citation
Technical Note (NIST TN) - 2284
Report Number
2284
Volume
2284
NIST Pub Series
Pub Type
NIST Pubs
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Keywords
Cold Neutrons, Cold Neutron Sources, Neutron Guides, Neutron Research, Research Reactors, Thermal Neutrons
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Created February 27, 2024, Updated November 1, 2024