廃炉・汚染水対策事業の全体像
The Overview of Project of Decommissioning and Contaminated Water Management
1（株）三菱総合研究所（廃炉・汚染水対策事業事務局）
1 Mitsubishi Research Institute, Inc. (Management Office for the Project ofDecommissioning and Contaminated Water Management)
松本 昌昭1、近藤 直樹1、芦田 高規1、河合 理城1
Masaaki Matsumoto1, Naoki Kondo1, Takaki Ashida1, Masaki Kawai1

１．Purpose
To ensure safe and steady decommissioning at Fukushima Daiichi NPS, it is important for us to gather domestic andoverseas wisdom for its research and development. Therefore, METI has set up the foundation in the FY2013 for carryingout the “Project of Decommissioning and Contaminated Water Management” which supports the R&D with a high level oftechnology.
The aim of this project is to consistently work on “Mid-and-Long-Term Roadmap towards the Decommissioning ofTEPCO’s Fukushima Daiichi NPS” and measures for decommissioning and contaminated water at Fukushima Daiichi NPS.

２．Project Overview
We are committing to R&D not only for developing technology to retrieve fuel debris but also for improving the working
environment including the internal investigation of Primary Containment Vessel (PCV)/Reactor Pressure Vessel (RPV), repairing
and water stoppage of PCV and criticality management. In addition to the retrieval of fuel debris, the long-term integrity
evaluation of fuel assemblies retrieved from spent fuel pool, the processing and disposal technologies of solid waste andmeasures for contaminated water have been studied and developed.
By the past R&D, a variety of technologies has advanced so that the reactor core status has gradually been revealed and useful
information for studying the policies of fuel debris retrieval was gathered. The project results are released on our website.
URL: http://dccc-program.jp/○Long-term Integrity Evaluation of Fuel Assembly Retrieved from
Spent Fuel Pool: IRID

○Development of Technologies for the Detection of Fuel Debris inside
Reactors: IRID

Evaluate the integrity of fuel assemblies affected by sea water injection, etc. forstudying the long-term storage in a shared pool and the future possibility of dry
storage of the fuel assemblies.

○Study of Processing Method of Damaged Fuel, etc. Retrieved from
Spent Fuel Pool: IRID
Study and examine damaged fuel’s technical issues for reprocessing. Examine theindicators to determine the possibility of reprocessing.

Storing ofSFP fuelMeasures for
Contaminated Water

Develop the observation technology using a cosmic ray, muon, for detecting thelocations of fuel and fuel debris inside RPV.

○Upgrading Level of Grasping State inside Reactor: IRID, IAE○Development of Remote Decontamination
Technology in the Reactor Building: IRID

Conduct a comprehensive analysis and evaluation to precisely understand the stateof fuel debris and atomic fission products inside the reactor.

Develop a remote decontamination technology to decrease
the air dose rate of working areas and access areas in thereactor building.

○Development of Characterization and Processing Technologies ofFuel Debris: IRID

Lowering the radiationdose inside R/B○ Development of Investigation Technology of Inside of PCV: IRID

Use simulant debris to obtain data for studying retrieval, containing, storage, etc.
of fuel debris.
Develop and verify the remote-controlled investigation equipment and system toinspect the state inside PCV.

○ Development of Investigation Technology of Inside of RPV: IRID
Develop remote-controlled investigation equipment and system to inspect theenvironmental conditions such as distribution of fuel debris, dose, etc. inside RPV.

○Demonstration Project for Seawater Purification Technologies：MHI, IBC, Obayashi Corporation, JGC Corporation, ATOX, AREVA NC,ANADEC○Development of Sampling Technologies: IRID
Study and develop the sampling equipment by creating a scenario for sampling ofactual fuel debris.

Conduct verification tests of purification technology for radioactive cesium andradioactive strontium in sea water at seaports.

Investigation of thereactor core status○Demonstration Project for Technologies for Capturing Radioactive
Substances from Soil: JGC Corporation, ATOX, AREVA NC, ANADEC
Conduct verification tests of technology for capturing radioactive strontium from soil.

○Demonstration Project of Technologies for the Decontamination ofContaminated Water Tanks: IHI, Obayashi Corporation, Kobe Steel

Ensuring of Safety

Conduct verification tests of decontamination technology for inside of bolted tanks.

○Demonstration Project for Unmanned Boring Technologies: ObayashiCorporation○Development of Corrosion Inhibition Technology for RPV and PCV:
IRID

Conduct verification tests of unmanned boring technologies in high-dose areas.

○Demonstration Project for Verification Tests of Tritium Separation
Technologies: Kurion, RosRAO, Sasakura Engineering, Hokkaido
University, Toshiba, Sou Innovation, NEXTIDE

Confirm the applicability of corrosion inhibition measures to a full-scale machine forinhibiting corrosion of structure materials of RPV/PCV for a long time and maintaining
the integrity.

Conduct verification tests of separation technologies for tritium which cannot beeasily processed with existing cleanup systems.

○Development and Management of Evaluation Method of Seismic
Performance/Impact of RPV and PCV: IRID
Clarify the damage to important machines inside RPV/PCV and the pervasive effect bymassive earthquake and examine measures for preventing and controlling the effect.

Processing and Disposalof Solid Waste○Development of Criticality Control Technologies of Fuel Debris: IRID
Study the criticality management approach for every working process of more than
one method and confirm the elemental technology is established.

○Research and Development of Processing and Disposal of Solid Waste:
IRID
Grasp properties of waste, and study the processing technology, the disposal concept
and the safety assessment method.

Containing, Transportationand Storage of Fuel Debris○Development of Technologies for Containing,
Transportation and Storage of Fuel Debris: IRID
Develop a storage canister which meet the conditions of fueldebris, and structure containing, transportation and storage
systems for multiple retrieval methods of fuel debris.

Retrieval of FuelDebris

Repairing Leaks fromPCV○Development of Repair and Water Stoppage Technologies forLeakage Sections in PCV: IRID

○Project of Upgrading Approach and System for Retrieval of Fuel Debris
and Internal Structures: IRID

Build a confinement function inside PCV and develop the repairing technology ofleakage sections to keep it stable and determine if the technology is applicable tothe full-scale machine.

Develop the technology needed for ensuring the confinement function, capturing andremoving dust and monitoring of α nuclides, etc.

○Full-scale Test for Repairing Leaks from PCV and Water Stoppageof PCV: IRID, JAEA

○Advancement of Fundamental Technologies for Retrieval of Fuel Debris
and Internal Structures: IRID, COMEX, Hamamatsu Photonics, Taisei
Corporation, ANADEC, Createc, IHI, Cavendish Nuclear, ONET, Q・I,Fujikura, RANDEC

Use a mockup facility to conduct the full-scale test of repairing and water
stoppage technologies and confirm that the technologies are established.

Develop the elemental technology for cutting, dust collection and recovery of fuel debris,
visual technologies, etc. and evaluate the technology establishment.
*Subsidized entities who participated in past projects related to Decommissioning andContaminated Water Management Project are also listed.

３．Role of Management Office

Ministry of Economy , Trade and Industry
Funding( Fund establishment organization )Information
sharing

Assignment
Management Office for the Project ofDecommissioning and Contaminated WaterManagement

Instructions
and advice

Management Office for the Project ofDecommissioning and Contaminated Water Management
TEL: 03-6705-6126
E-mail: hairo-contact@mri.co.jp

Information
sharing

Settlement ofsubsidy amountCompletion report

Progress management
Inspection

Progress report

Comments
Grant decision

Application for Grant

Adopt

Project proposal( Mitsubishi Research Institute, Inc. )Solicit

Subsidy payment

Since the start of the subsidized project, Mitsubishi Research Institute, Inc. has been
serving as the Management Office with specialist of nuclear energy, project management,etc. We are practicing consistent project management which includes the solicitation ofdomestic and overseas research and development, the evaluation ofproposal/presentation and the adoption, the work related to the subsidy grant, themanagement of project’s progress, (management of monthly process, the on-site survey,
hosting of progress/final report meetings), scrutiny of the subsidy spending(intermediate/final inspection of the subsidy amount), making payment, etc.

Comments

Subsidized entities( Private organization, etc. )Figure 1. Implementing Scheme

The Nuclear Damage
Compensation andDecommissioning
Facilitation
Corporation
Comments
Tok y o Electric Pow er
Company Holdings,
Incorporated