Transition of decommissioning to step 2 at Hamaoka Nuclear Power Station Units 1 and 2

Chubu Electric Power today shifted into step 2 regarding the decommissioning of Hamaoka Nuclear Power Station Units 1 and 2.

The "Hamaoka Nuclear Power Station Units No. 1 and 2 Decommissioning Plan (Note 1)," which Chubu Electric Power filed for approval on March 16, 2015 for the transition to step 2, was today approved by the Nuclear Regulation Authority.

The Nuclear Regulation Authority also granted approval to changes on the Technical Specification of Nuclear Generation Facilities, associated with progress in decommissioning.

Under step 2 of the decommissioning, which is scheduled to be completed by FY2022, Chubu Electric Power will launch on initiatives to dismantle reactor zone peripheral equipment (Note 2), and will also continue to decontaminate the reactor pressure vessel and survey the contamination status.

Dismantled materials generated in step 2 will be recycled as much as possible. Radioactive waste will be safely stored in the buildings of Units 1 and 2 until the disposal method is determined.

Chubu Electric Company will steadily advance the decommissioning of Units 1 and 2 while both securing transparency and giving utmost priority on ensuring safety.

(Note 1) "Hamaoka Nuclear Power Station Units No. 1 and 2 Decommissioning Plan" provides the overall plan for safely and reliably dismantling the reactor facilities of Units 1 and 2, and it also gives details for the work carried out during the step 2 decommissioning and measures for ensuring safety. The decommissioning of Units 1 and 2 is divided into four steps from step 1, i.e. "dismantling work preparation period" to step 4, i.e. "building dismantling and removal period" and will be conducted in this order.

(Note 2) Reactor zone peripheral equipment is equipment excluding reactor zones, such as the stack, turbine body, main condenser, condensate and feed water system equipment, standby liquid control system equipment and main steam pipes.