Temporary Excess of Storage Capacity of Unsealed Radiation Source Revealed an Underlying Improper Radiation Safety Management

Abstract

 In July 2015, during the renovation of the facility, the Isotope Science Center in the University of Tokyo was found to have exceeded its storage capacity of unsealed radiation source. This storage capacity overshoot was resolved by discarding and transferring the radiation source to the Japan Radioisotope Association. In addition, radiation safety management was re-inspected by on-site inspection conducted by the Radiation Regulation Office of Nuclear Regulation Authority, Japan. This case report included instructions on how to improve potential deficiencies in radiation safety management.