b'HP-MR at the same burnup. Becauseand higher operating temperaturesFigure 4. BNL microreactor analysis of the neutron capture reactioncould easily be implemented withoutteam (Arantxa Cuadra and Cihang Lu)of N-14 through the 14N(n,p)14Csignificant neutronic penalty.reaction, the N-15 enrichment andA cost benefit analysis should the U-235 enrichment of the UNassess the trade-off between fuel options can be negatively (andU-235 and N-15 enrichments and linearly) correlated.consider whether the cost of U-235 The use of the different fuel optionsenrichment to HALEU levels had a minor impact on the fuelbut with a small mass require-reactivity temperature coefficientsment (UN TRISO) is more costly which remained ~ -3 pcm/Kthan low U-235 enrichment (on throughout the fuel cycle. Due tothe order of commercial level the high thermal conductivity of the~5%) but with significant mass TRISO compacts and UN fuel pellets,requirements (UN pellets).temperature differentials are small, 2023|AFC ACCOMPLISHMENTS 127'