"JOYO" Start-up test report; 50MW, 75MW Power-up test (PT-01)

Hirose, Tadashi*; not registered; not registered; not registered; Yamamoto, Hisashi*

The purpose of this test is to establish the power-up procedure to the rated power. The first stage rated power was 50 MWt and it was achieved on July 5, 1978. The second stage rated power was 75 MWt and it was achieved on July 16, 1979. This report describes the results of these power-up tests. The results were; (1)The optimum heat up rate from warm stand-by to hot stand-by is about 20C/hr, corresponding to about 1.5mm/5min of the regulation rod handling speed. (2)The optimum power-up rate from hot stand-by is about 5 MW/20min, corresponding to about 1mm/2min of the regulation rod handling speed. (3)The optimum reactor power to start the main blowers is about 10 MWt.