Development of multi-level, multi-scenario simulation systems for sodium cooled fast reactor, 2; Conceptual design of multi-level simulation system and development plan

Doda, Norihiro  ; Araseki, Hideo; Nabeshima, Kunihiko  ; Takata, Takashi  ; Tanaka, Masaaki  ; Ohshima, Hiroyuki

JAEA has started the development of a multi-level plant simulation system as a powerful tool for the design studies of sodium-cooled fast reactors. This system enables from highly-efficient to highly-accurate analyses of various operating statuses including normal operation, abnormal transient and accidents by employing multi-level models, and is able to respond flexibly to most of the design options. The conceptual design of the new system, the coupling method of codes as a key of the system development, and the development plan are reported in this presentation.