Conceptual Operating Procedures for STELLA-2

In the first phase of STELLA program, separated effects tests for demonstrating the thermal-hydraulic performances of major components such as a decay heat exchanger (DHX), Natural-draft sodium-to-air heat exchanger (AHX) of the decay heat removal system, and mechanical sodium pump of the primary heat transport system (PHTS) had been successfully performed using STELLA-1 in 2015. In the second phase, to demonstrate thermal-hydraulic performances and safety features and to produce base data for the specific design approval for the PGSFR (Prototype Generation IV Sodium-cooled Fast Reactor) which is craved to be constructed in the late 2020s or early 2030s in Korea, integral effects tests will be carried out using the STELLA-2 test facility which was just finished detailed design for construction in 2017 and will be constructed in the near future. In order to provide feedbacks on the detailed design of the STELLA-2 and to produce detailed operating procedures for the initial and normal operation of the STELLA-2, the conceptual operating procedure from the inactivation process of experimental facility to the steady state simulation operation and the liquid sodium draining is developed.