An Analysis of the secondary loop natural circulation test in Monju using SSC-L

not registered  ; Yamaguchi, Akira

Loop-version of Super System Code (SSC-L) has been applied to the analysis of the secondary loop natural circulation test (heated up by the pumps: 4.3MWt) in Monju. The purposes of this study are to validate the computer program and to point out the additional plant data necessary for the analysis of the proposed tests with better accuracy. From the test results, generated heat in the pumps is 4.3 MWt while the removed heat at ACS is 3.4 MWt in the initial steady state. The difference is caused by heat losses from the heat transport system and it is taken into account in the SSC model. The tansient thermohydraulic performance in the secondary heat tansport system simulated using SSC-L is in agreement with the test data. Hence, the pressure loss model in SSC-L is validated and the code is applicable to the natural circulation conditions. Validation of other component models in SSC-L is in progress using Monju data towards a whole plant natural circulation test.