JAPAN ATOMIC INDUSTRIAL FORUM, INC.

for Japanese

ATOMS in JAPAN

2 August, 2019

Tohoku Electric Power Applies for Approval of Onagawa-1 Decommissioning Plan

On July 29, the Tohoku Electric Power Co. filed an application with the Nuclear Regulation Authority (NRA) of Japan for approval of the decommissioning plan for its Onagawa-1 Nuclear Power Plant (BWR, 524MWe, commissioned in June 1984). Also, three days earlier, on July 26, the company requested preliminary talks with Miyagi Prefecture, Onagawa Town and Ishinomaki City under nuclear safety agreements with the respective siting municipalities.

Onagawa-1 had originally been shut down in the wake of the giant earthquake that struck eastern Japan on March 11, 2011. In October 2018, Tohoku Electric Power decided to decommission the reactor after a comprehensive review of the major technological challenges involved were it to be restarted, such as measures to enhance safety, a consideration of the number of years it had been in operation, and issues related to power generation.

The entire decommissioning process is divided into four stages, as follows: (1) preparation for dismantling, (2) the dismantling and removal of facilities and equipment in the area surrounding the reactor, (3) the dismantling and removal of facilities and equipment in the reactor area, and (4) the dismantling and removal of the reactor building and other structures.

The final completion of the process is put at more than three decades from now, at FY53 (April 2053 to March 2054). During the stage of preparation for dismantling—the period from approval of the decommissioning plan to FY27—all of the 821 spent fuel assemblies currently stored in the Unit 1 spent fuel pool will be transferred to and stored in the Unit 3 spent fuel pool.

Once decommissioning is complete, the fuel assemblies will then be transferred to the licensee for reprocessing activities, together with the 161 fuel assemblies from Unit 1 that are now being stored at the spent fuel pools of Units 2 and 3.

Of the approximately 300,000 tons of dismantling waste expected as a result of the decommissioning, about 18,500 tons will be solid radioactive waste. About 12,400 tons of the latter amount is expected to be below a designated clearance level (that is, not requiring handling as radioactive material) and will be recycled to the maximum extent, following prescribed procedures under relevant laws. The total cost for dismantling is estimated at JPY41.9 billion (US$380 million at USD1=JPY110).

Additionally, of the total of 14 NPPs currently designated for decommissioning (excluding all units at Fukushima Daiichi and Daini), decommissioning plans for nine reactors have already been approved by the NRA, as follows:

  • Tokai-2 and Tsuruga-1 (Japan Atomic Power Company)
  • Hamaoka-1 and -2 (Chubu Electric Power Co.)
  • Mihama-1 and -2 (Kansai Electric Power Co.)
  • Shimane-1 (Chugoku Electric Power Co.)
  • Ikata-1 (Shikoku Electric Power Co.)
  • Genkai-1 (Kyushu Electric Power Co.)

Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

SNS facebooktwitter

NPPs Map

Video

Grossi on Fukushima: Marking a Decade Since the Accident

10 March, 2021
Grossi on Fukushima: Marking a Decade Since the Accident04:11

Recent News

14 September, 2021
IAEA Deputy Director General Evrard Visits Japan in Advance of Safety Review of ALPS-treated Water
1 September, 2021
Evaluation Report Issued by IAEA’s Review Mission to Fukushima Daiichi: First Visit since 2018
24 August, 2021
METI and IAEA Agree on Further Review Missions to Fukushima Daiichi
4 August, 2021
JAEA Restarts High-Temperature Engineering Test Reactor “HTTR”
2 August, 2021
Information about Fukushima Daiichi NPS Water Treatment
28 July, 2021
METI’s Committee Shows Rough Draft of Next Strategic Energy Plan
2 July, 2021
Mihama-3 Restarted After Decade-long Hiatus: First Restart in Japan of a Reactor Operating Beyond 40 Years
28 June, 2021
Mihama-3 Restarts after Decade-long Hiatus
25 June, 2021
New Canada-Japan Partnership Supports Greater Collaboration to Meet Climate Change Objectives and Net-zero Goals
24 June, 2021
METI Issues New Green Growth Strategy Through Achieving Carbon Neutrality
16 June, 2021
ANRE Sticks to “S+3E”
16 June, 2021
Japanese Cabinet Approves Environmental White Paper 2021
16 June, 2021
LDP Parliamentary Association to Reconfirm Position on Utilization of Nuclear Power
16 June, 2021
Fukui Governor Concerned about Deletion of Reference to “Maximum Utilization” of Nuclear Power
14 June, 2021
Working Group on Offshore Release of Treated Water Meets in Miyagi
14 June, 2021
NRA Considers Policy on Treating Slurry from ALPS, with Local Understanding Essential
11 June, 2021
Japanese Cabinet Approves Energy White Paper 2021
11 June, 2021
Government Omits Description of “Maximum Utilization” of Nuclear Power
9 June, 2021
MNF Hopes to Resume Fuel Production as Early as November
8 June, 2021
TEPCO to Develop Sample Tanks at Fukushima Daiichi to Prepare for Offshore Release of Treated Water
▲TOP