A methodology for the coupling of RAMONA-3B neutron kinetics and TRAC-BF1 thermal-hydraulics

摘要: Abstract The initial objective of this project was to directly couple the RAMONA and TRAC codes running on different PCs. idea use best part each one eliminate some their limitations widen applicability these simulate BWR system components. It required try minimize amount changes present code subroutines calculation procedures. If possible, just substitute values obtained in parallel code. Preliminary results indicated that using a CHAN component model thermal-hydraulic phenomena for neutronic channel modeled is rather difficult. Large amounts CPU time consumption are lots PCs would make solution difficult, besides considerable large transients introduced by differences codes. substitution thermal-hydraulics RAMONA, calculations, possible but simulation null transient both must be planed gradual change controlled an additional supervisory subroutine. An indirect coupling codes, it therefore proposed, order most limitations. In coupling, average tube bundle global cooling fluid dynamics programmed while reactor vessel core with four channels rings. Results more reliable, simpler faster simulations possible.