「常陽」MK-2構造材料照射用反射体(PRS040)の照射後試験(1); 照射リグ及びコンパートメントの非破壊試験

Postirradiation examination of "JOYO" MK-II structural materials irradiation rig (Fab. No. PRS040); Nondestructive testing on irradiation rig and its compartments

沖元 豊*; 浅賀 健男*; 西野入 賢治*; 永峰 剛*

not registered; not registered; not registered; not registered

高速実験炉「常陽」MK-II100MW定格第1サイクル期間に炉心第7列で照射され、積算中性子照射量1.191021n/cm2(E0.1MeVを有する構造材料照射用反射体(StructuralMate-rialsIrradiationRig‥SMIR)「PRS040」の照射後試験を実施した。本試験の照射燃料集合体試験施設(FMF)における目的は、主として下記の三点である。1.炉内でのリグの健全性確認、及び照射挙動の把握 2.照射リグの開発に反映させるためのNa洗浄性、及び遠隔解体性の確認 3.試験片入りキャプセルの取出しと搬送本照射後試験により下記する結果を得た。1.中性子照射量が比較的低いため、中性子照射に伴う構造体の変形、及び構造体としての健全性に影響をおよぼすような異常、損傷等は認められず、本リグの炉内での健全性を確認した。2.本リグのNa洗浄性は良好であった。また、遠隔解体性もCMIRの経験を踏えて容易に実施できた。3.リグの遠隔取扱いによる試験片入りキャプセルの取出しを終了し、リグの搬入からキャプセル取出しまでの標準工程を確立した。

Postirradiation Examination (PIE) of "JOYO" MK-II Structural Materials Irradiation Rig (SMIR : Fab. No. PRS040) has been performed. The rig was irradiated during the 1st cycle of 100MW reactor power, and had the neutron fluence of about 1.19 10n/cm (E0.1 MeV) The purpose of the present PIE in Fuel Monitoring Facility (FMF) are listed as following: (1)Verification of validity of designing of the integrity and investigation on irradiation behavior of "SMIR". (2)Evaluation of the propriety of the "SMIR" designing from a viewpoint of the disassembling and sodium removal. (3)The handling of small test pieces and shipment of the test pieces to Materials Testing in MMF. The result were summarized as follows : (1)Neutron fluence of "SMIR" was relctivey low, so that the integrity and rig elements were kept normelly during irradiation period. (2)The residual sodium in the rig was scarcely found, and the rig was easily disassembled by remote handling. (3)The remote handling of small test pieces was easily carried out. A standard schedule for "SMIR" PIE performance in FMF has been established.