User's manual of safety map code SWAC-10-MJ/1; Evaluate detector capability against small leak sodium-water reaction

not registered; Daigo, Yoshimichi; Miyake, Osamu; not registered; not registered

Water leak detectors-hydrogen concentration meters are equipped with secondary cooling system of LMFBR to detect small leak of water from heat transfer tube in steam generator. Leak rate region to be able to detect the water leaks before secondary tube failure is decided by using the concept of so-called "safety map". Computer cade "SWAC-10-MJ/1" provides the safety map for secondary cooling system of proto-type reactor. This paper is written for user's manual of the code. SWAC-10-MJ/1 code was made through the modification of original code "SWAC-10" which had been developed for 50MW Steam Generator Test facility. Major differences from SWAC-10 code are as follows ; (1) Secondary cooling system of proto-type LMFBR is selected for calculation object (2) Wastage rate equations proposed by PNC are accepted. (3) Effect of enlargement of initial water leak hole due to self-wastage is introduced. (4) Hydrogen diffusion process in Ni membrane of hydrogendetector is introduced.