Showing 32 results for Author: Ian T. Greenquist
Jul, 2026
Journal
The susceptibility of the boiling water reactor (BWR) Limerick Unit 1 to fuel fragmentation, relocation, and dispersal during a postulated large-break loss-of-coolant accident (LBLOCA) was calculated using a multiphysics framework. The simulations include full-core, rod-resolved neutronic, thermal hydraulic, and fuel performance models using the VERA, TRACE, and BISON code…
Oct, 2025
ORNL Report
Sep, 2025
Journal
The nuclear forensics community is considering the use of isotopic taggants to aid in provenance assessment of nuclear materials. However, these taggants must be selected to ensure they do not adversely affect fuel performance during normal operation nor accident scenarios. Taggants are known to affect the fuel’s grain size and porosity. This work used the BISON fuel perfo…
Jun, 2025
Journal
A novel nuclear fuel concept has been proposed, consisting of UOâ‚‚ particles suspended in a liquid metal alloy. To evaluate its feasibility, the compatibility of Zircaloy-4 cladding with candidate eutectic PbSn and PbBiSn alloys—as well as with pure Pb, Bi, and Sn—was investigated through 1000-hour exposures at 400 °C and 600 °C. Severe degradation of the Zircaloy-4 specime…
Jun, 2025
Journal
The primary operational costs for existing nuclear reactors are plant operation costs, maintenance costs, and fuel costs, all of which are influenced by the materials used and the design of the reactor core. Optimizing core design parameters—including burnup limits and enrichment levels—can lengthen cycles, reduce outages, reduce reload batch fractions and spent fuel stora…
Aug, 2024
ORNL Report