Core Design Studies on a Low-Enriched Uranium Reactor for Cold Neutron Sources at NIST
Zeyun NMN Wu, Robert E. Williams
A LEU-fueled research reactor for cold neutron sources is currently being studied at NIST. The new design is targeting at least two high quality cold neutron sources. A tank-in-pool type reactor with a horizontally split compact core cooled by light water and reflected by heavy formance. The thermal power of the new reactor is designated at 20 MW and the operating cycle of the equilibrium core is set to be 30 days. Core design studies were performed mainly using the Monte Carlo code MCNP-6. The core performance characteristics at several representative burnup states of an equilibrium cycle including startup (SU) and end of cycle (EOC) are presented in the paper to demonstrate the performance of the new design. The calculated surface current at the exit hole of the cold neutron source is expected to achieve a gain factor of three compared to the cold neutron performance of the existing NSIT reactor.
Proceedings on International Conference on Reactor Physics PHYSOR 2016
May 1-5, 2016
Sun Valley, ID
International Conference on Reactor Physics PHYSOR 2016
Low-Enriched Uranium, Research Reactor, Cold Neutron Source
and , R.
Core Design Studies on a Low-Enriched Uranium Reactor for Cold Neutron Sources at NIST, Proceedings on International Conference on Reactor Physics PHYSOR 2016, Sun Valley, ID, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=920284
(Accessed September 23, 2023)