Results of All ITER TF Full-Size Joint Sample Tests in Japan

Nine toroidal field (TF) coils have been developed in Japan for the international thermonuclear experimental reactor (ITER). The joint resistance of TF coil should satisfy the requirement of smaller than 3 nano-ohm at 2 T of external magnetic field and 68 kA of transport current. Full-size joint sample (FSJS) tests were performed for joint development and for TF coil manufacture, as part of the process control. 11 FSJS tests are conducted in total. FSJS tests were conducted with assistance from a test faculty in the National Institute for Fusion Science as reported in a previous paper. All FSJS tests successfully satisfied the requirement of resistance less than 3 nΩ at 2 T. Additionally, the TF coil joints are subjected to cyclic electromagnetic force and warm-up/cool-down during the ITER operation. The authors investigated the joint performance for the abovementioned influence. The results showed no degradation in the joint resistance. Thus, the TF joint developed in Japan was qualified successfully

〔研究ノート〕 家庭的保育事業における個別ケアを要する 乳幼児及び障害児に関する調査研究

This study aims to reveal the current circumstances in provision of care for children with disabilities or with health problems(referred to as "children with special needs")in family day care services. A questionnaire survey was conducted in 121 cities that provide family day care services. Result showed that about 37% of cities accepted or got requests to accept children with special needs. Issues such as the caregivers\u27 unsuitable home environments, lack of extra payment for caregivers, and lack of skills among caregivers are factors that might prevent cities from accepting children with special needs into family day care services. On the other hand, stable environment and small group setting could make these services suitable for children with special needs, as well