Remote handling design for moderator-reflector maintenance in JSNS

Teshigawara, Makoto   ; Aizawa, Hideyuki; Harada, Masahide   ; Kinoshita, Hidetaka   ; Meigo, Shinichiro   ; Maekawa, Fujio  ; Kaminaga, Masanori  ; Kato, Takashi; Ikeda, Yujiro

This report introduces the present design status of remote-handling devices for activated and used components such as moderator and reflector in a spallation neutron source of the Material and Life Science Facility (MLF) at J-PARC. The design concept and maintenance scenario are also mentioned. A key maintenance scenario adopts that the used components should be taken out from the MLF to the other storage facility after the volume reduction of them. Almost full remote handling is available to the maintenance work except for the connection/disconnection pipes of the cooling water. Total six remote handling devices are used for moderator-reflector maintenance. They are also available to the proton beam window and muon target maintenance. Maintenance scenario is separated into two works. One is to replace used components to new ones during beam-stop and the other is dispose used components during beam operation. Required period of replacement work is estimated to be 15 days, on the other hand, the disposal work is 26 days after dry up work (30 days), respectively.