Design, fabrication and test report on HANARO instrumented capsule (02M-05U) for the researches of universities in 2002

As a part of 2002 project for active utilization of HANARO, an instrumented capsule (02M-05U) was designed, fabricated and irradiated for the irradiation test of various nuclear materials under irradiation conditions requested by external researchers from universities. The basic structure of 02M-05U capsule was based on that of the 00M-01U and 01M-05U capsules successfully irradiated in HANARO as 2000 and 2001 projects. However, because of the limited number of specimens and budget of 4 universities, the remained space of the capsule was charged with KAERI specimens of nuclear core material. The materials of the specimens are mainly Fe and Zr-based alloys partially mixed with Ti and Al alloys. The capsule is composed of 5 stages having many kinds of specimens and independent electric heater in each stage. During the irradiation test, the temperature of the specimens and the thermal/fast neutron fluences were measured by 14 thermocouples and 5 sets of Ni-Ti-Fe neutron fluence monitors installed in the capsule. Various types of specimens such as SP(Small Punch), tensile, Charpy, TEM, hardness, optical microscopy specimens were inserted in the capsule. The capsule was irradiated in the CT test hole of HANARO of 24MW thermal output at 290∼350 .deg. C up to a fast neutron fluence of 3.0 1020(n/cm2) (E>1.0MeV). The obtained results will be very valuable for the related researches of the users