大阪大学核物理研究センター・AVF サイクロトロン棟の耐震改修工事に伴う放射線管理区域境界の変更とサイクロトロン用放射線管理インターロックシステムの更新

抄録

  The accelerator facility at Research Center for Nuclear Physics, Osaka University equipped with AVF and ring cyclotrons, has been utilized for experiments in nuclear physics and nuclear chemistry since 1976. In the Japanese Fiscal Year 2012, a part of the AVF cyclotron building, including the radiation control area, was renovated for anti-earthquake reinforcement and the floor arrangement of the building was fully changed. The radiation control area was reduced on the first floor and one gate of the radiation control area was added on the second floor. The radiation control interlock system for safety of the cyclotron facility was renewed in this renovation period. A complicated relay array for the interlock circuit was replaced by an intelligent PLC system, and a new physical access control system by identification through fingerprints or an IC card was installed. In this report, we introduce a change of the radiation control area border and a renewal of the radiation safety interlock system for the cyclotron facility.