Evaluation of a uranium zirconium hydride fuel rod option for conversion of the MIT research reactor (MITR) from highly-enriched uranium to low-enriched uranium

Journal Article · 23 March 2017 · Nuclear Engineering and Design

DOI: https://doi.org/10.1016/j.nucengdes.2017.02.034 · OSTI ID:1349058

Dunn, F. E. ^[1]; Wilson, E. H. ^[1]; Feldman, E. E. ^[1]; Sun, K. ^[2]; Wang, C. ^[2]; Hu, L. -W. ^[2]

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1. Argonne National Lab. (ANL), Argonne, IL (United States)
2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Nuclear Reactor Lab.

The conversion of the Massachusetts Institute of Technology Reactor (MITR) from the use of highly-enriched uranium (HEU) fuel-plate assemblies to low-enriched uranium (LEU) by replacing the HEU fuel plates with specially designed General Atomics (GA) uranium zirconium hydride (UZrH) LEU fuel rods is evaluated in this paper. The margin to critical heat flux (CHF) in the core, which is cooled by light water at low pressure, is evaluated analytically for steady-state operation. A form of the Groeneveld CHF lookup table method is used and described in detail. A CHF ratio of 1.41 was found in the present analysis at 10 MW with engineering hot channel factors included. Therefore, the nominal reactor core power, and neutron flux performance, would need to be reduced by at least 25% in order to meet the regulatory requirement of a minimum CHF ratio of 2.0.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation; USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20), Office of Material Management and Minimization (M3)
• Contributing Organization: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
• Grant/Contract Number: AC02-06CH11357
• OSTI ID: 1349058
• Alternate ID(s): OSTI ID: 1366484; OSTI ID: 1415517
• Journal Information: Nuclear Engineering and Design, Vol. 317; ISSN 0029-5493
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English