ONE-ROW SCWR DESIGN ANALYSIS USING COUPLED RP/TH ANALYSIS

摘要

This work concerns the comparison of assembly designs using coupled reactor physics and thermal-hydraulic methods, as applied to the supercritical water reactor (SCWR), which is among proposed Generation Ⅳ design for long-term deployment. In the SCWR, large density gradients in the supercritical water (used as coolant and moderator) will require detailed multi-physics analysis. The Super Light Water Reactor (SLWR) was analyzed previously (C. R. Hughes, et al., Hughes et. al, accepted for Nuclear Engineering and Design, 2014), where MCNP was coupled with density and temperature results from a single channel code. MCNP then provided the single channel code with a linear heat profile. In the present work, that proposed assembly design is determined to have negative density coefficient of reactivity. The assembly design was modified by adding additional pins between moderator boxes to achieve a positive density coefficient of reactivity. The modified design is similar to the High Performance Light Water Reactor (HPLWR), an often-cited European concept.