Hydraulic characteristics and sodium flow tests on "JOYO" MK-II irradiation test assemblies; Pressure loss measurement and sodium steeping of CMIR and SMIR

not registered; Abe, Sadayoshi*; not registered; Iguchi, Tatsuro*

Hydraulic test and sodium soaking were carried out for "JOYO" MK-II Core Materials Irradiation Test Assembly (CMIR) and Structual Materials Irradiation Test Assembly (SMIR). The results were as follows. (1)The pressure loss coefficient of CMIR was 75.6 at Reynolds number of 1.58 10. This result agreed well with its design value. (2)The total pressure loss of SMIR was 0.5806 kg/cm at 0.5 kg/sec. And the pressure loss of the orifice of SMIR was 0.5194 kg/cm at 0.5 kg/sec. (3)Sodium soaking, sedoum draining and preheating tests of CMIR and SMIR were performed under simulated plant conditions. The test result obtained will be reflected to the actual post irradiation examinations together with the cleaning test and disassembling test to be conducted by other sections.