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Title: Transition Core Analysis for HEU to LEU Fuel Conversion at the University of Missouri Research Reactor

Abstract

A new type of low-enriched uranium (LEU) fuel based on an alloy of uranium and molybdenum is expected to allow the conversion of U.S. domestic high-performance research and test reactors requiring high density fuel from highly enriched uranium (HEU) to LEU. The University of Missouri Research Reactor (MURR (R)) has undergone design and performance calculations for conversion to this LEU fuel. Presented in this paper is the analysis of a crucial step in the conversion process: the sequence of MURR transition cores from all fresh to equilibrium burnup LEU operations. During the initial conversion from HEU to LEU fuel, MURR will operate atypically due to the lack of burned LEU elements. Given the constraints of MURR operation and experiments, a proposed transition scheme minimizes the time MURR operates atypically compared to the prototypic cycles currently run with HEU fuel and moves quickly to the same sort of equilibrium cycles for the LEU fuel.

Authors:
 [1];  [2];  [1];  [1];  [2]
  1. University of Missouri Research Reactor, Columbia, MO (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
OSTI Identifier:
1774534
Grant/Contract Number:  
AC02-06CH11357; 7J-30010
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Technology
Additional Journal Information:
Journal Volume: 207; Journal Issue: 2; Journal ID: ISSN 0029-5450
Publisher:
Taylor & Francis - formerly American Nuclear Society (ANS)
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; research reactor; fuel conversion; transition core analysis

Citation Formats

Cowherd, Wilson, Stillman, John, Gahl, John, Foyto, Leslie, and Wilson, Erik. Transition Core Analysis for HEU to LEU Fuel Conversion at the University of Missouri Research Reactor. United States: N. p., 2020. Web. doi:10.1080/00295450.2020.1763720.
Cowherd, Wilson, Stillman, John, Gahl, John, Foyto, Leslie, & Wilson, Erik. Transition Core Analysis for HEU to LEU Fuel Conversion at the University of Missouri Research Reactor. United States. https://doi.org/10.1080/00295450.2020.1763720
Cowherd, Wilson, Stillman, John, Gahl, John, Foyto, Leslie, and Wilson, Erik. 2020. "Transition Core Analysis for HEU to LEU Fuel Conversion at the University of Missouri Research Reactor". United States. https://doi.org/10.1080/00295450.2020.1763720. https://www.osti.gov/servlets/purl/1774534.
@article{osti_1774534,
title = {Transition Core Analysis for HEU to LEU Fuel Conversion at the University of Missouri Research Reactor},
author = {Cowherd, Wilson and Stillman, John and Gahl, John and Foyto, Leslie and Wilson, Erik},
abstractNote = {A new type of low-enriched uranium (LEU) fuel based on an alloy of uranium and molybdenum is expected to allow the conversion of U.S. domestic high-performance research and test reactors requiring high density fuel from highly enriched uranium (HEU) to LEU. The University of Missouri Research Reactor (MURR (R)) has undergone design and performance calculations for conversion to this LEU fuel. Presented in this paper is the analysis of a crucial step in the conversion process: the sequence of MURR transition cores from all fresh to equilibrium burnup LEU operations. During the initial conversion from HEU to LEU fuel, MURR will operate atypically due to the lack of burned LEU elements. Given the constraints of MURR operation and experiments, a proposed transition scheme minimizes the time MURR operates atypically compared to the prototypic cycles currently run with HEU fuel and moves quickly to the same sort of equilibrium cycles for the LEU fuel.},
doi = {10.1080/00295450.2020.1763720},
url = {https://www.osti.gov/biblio/1774534}, journal = {Nuclear Technology},
issn = {0029-5450},
number = 2,
volume = 207,
place = {United States},
year = {2020},
month = {7}
}

Works referenced in this record:

Development of very-high-density low-enriched-uranium fuels
journal, December 1997