Overview
- Japan Nuclear Fuel announced on October 27 that a subcontracted male worker in his 40s tested positive for radioactive material in his nasal cavity inside the Rokkasho reprocessing plant in Aomori Prefecture.
- The event occurred on October 24 during replacement of part of an exhaust system that vents radioactive substances from a tank.
- Rising radiation readings were recorded during the task, and contamination was found on the worker’s mask filter.
- The worker is believed to have breathed for up to about three minutes without a filter while changing it.
- The worker currently has no reported symptoms, and examinations are underway to determine whether internal exposure occurred.