IRID Annual Symposium 2014

Overview and Activities ofInternational Research Institute for
Nuclear Decommissioning (IRID)
July 18, 2014
Kazuhiro Suzuki
Executive Director
International Research Institute for Nuclear Decommissioning
無断複製・転載禁止 技術研究組合 国際廃炉研究開発機構©International Research Institute for Nuclear Decommissioning

Revision of Mid-and-Long-Term Roadmap and Background of Establishment of IRID
Overview of revised Mid-and-Long Term Roadmap(Council for the Decommissioning on June 27, 2013)
1. Acceleration of the schedule for each unit corresponding to the respective condition.
 Multiple plans were developed aiming at the fuel debris retrieval for initial unit to be conducted
ten years later to be flexible with each unit.
2. Enhance communication with local community
 Establish “Fukushima Advisory Board (tentative name)” Provide opportunity to find the corporation in Fukushima in order to collaborate fordecommissioning work, and revitalize regional economy by encouraging local corporations
supplying equipment/tools.
3. Full scale maintenance of structure to gather knowledge and ideas from around the world.
 Establish R&D organization and arrange system to receive advice from overseas experts.
 Enhance collaboration with IAEA review mission, and proactive promotion of international joint
research.
In addition to the above, following items will be stipulated and addressed in the Mid-and-Long Term
Roadmap.
 Reports the countermeasures on control of groundwater inflow by “Contaminated Water
Treatment Committee.” Secure safety of ”Specified Reactor Facility” and measures on regulations, such as ofarrangement of new standards. (improve reliability of equipment and facilities, and operation
safety for operator and radiation safety etc.)©International Research Institute for Nuclear Decommissioning１

Process of Establishment and Role
Establishment
・August 1, 2013: Approved by Mr. Motegi, the Minister of Economy, Tradeand Industry, according to the Research & Development Consortium Act ofJapan.
・August 8, 2013: General Meeting and the Board of Directors were held tostart the consortium. Launched as the International Research Institute for
Nuclear Decommissioning.
Basic Role
・Fully committing to technology R&D that helps the decommissioning projectof Fukushima Daiichi NPS as an urgent subject, based on which enhancing
the technological basis for nuclear decommissioning for the future.

©International Research Institute for Nuclear Decommissioning２

Technical Research InstituteTechnical research association is an organization for mutual support where themembers conduct joint research on the technologies used for the industrial activities
for themselves（non-profitable mutual benefit corporation established in accordancewith the Research & Development Consortium Act of Japan).
<Features of Technical Research Association>
 Each member provides researchers, researchfund, facilities etc., and manage and utilize
1. Organization change
those result together.
Change the organization to
Stock company orJoint research organization with legal
limited company and facilitate
personality, independent from the members.
utilization of research results.
Stock corporation or Improve transparence and reliability oflimited company
organizational operation through theregistration and application for authorization
2. Incorporation-type company split
for establishment for the competent minister,
Establish stock company or
and members’ general conference and thelimited company byboard of directors.
incorporation-type company split
and utilize research obtained.
 Person or party （including domestic
corporation, individuals, foreign corporation
Split stock corporation orlimited company
and foreigner ） that utilizes the results ofjoint research directly or indirectly can be amember of this organization.
3. Dissolution
 This organization can be utilized as a place of
Dissolve Technical Institutecooperation among government, industry
And the members brings
research results back and utilize.
and academia since the universities andindependent administrative corporation of
4. Split of Technical Institutetest research, technical college, local publicbody, foundation mainly aiming at the test
Extract specific research
themes and split organization
research etc. members can take part in.
for each research theme(Excerpts from METI)

Overview of Technical Research InstituteCorporation(member)

R&D tax system
Cost processing
Amount imposed
R&D tax system
Cost processing
Authority
Amount imposed
Legal entity
Research Institute

University(member)

Publicresearch
institute(member)

Reduction entry

Research
Institute

Split Technical InstituteResearch result

Corporation(member)©International Research Institute for Nuclear Decommissioning３

Outline of IRID
1. NameResearch & Development Consortium,“International Research Institute for Nuclear Decommissioning” (“IRID ” in brief)

2. Location of Main Office
6F, Parkplace, 5-27-1, Shimbashi, Minato-Ku, Tokyo, 105-0004, Japan(http://www.IRID.or.jp)

3. Founding members (18)- Incorporated administrative agencies:
Japan Atomic Energy Agency, National Institute of Advanced Industrial Science andTechnology.
- Manufacturers:
Toshiba Corporation, Hitachi-GE Nuclear Energy, Ltd., Mitsubishi Heavy Industries, Ltd.,ATOX (since May 29, 2014)- Electric utilities etc :Hokkaido Electric Power Company (hereinafter called as EPC), Tohoku EPC, Tokyo EPC,
Chubu EPC, Hokuriku EPC, Kansai EPC, Chugoku EPC, Shikoku EPC, Kyushu EPC, The Japan
Atomic Power Company, J-POWER, Japan Nuclear Fuel Limited.

4. Board of directors
President: Dr. Yamana, Vice President: Dr. Arai, and Mr. Kenda, Executive Director: Mr. Suzuki
Director: Mr. Oikawa, Mr. Moriyama, Mr. Uozumi , Mr. Hatazawa, Mr. Seto
Mr. Fukuda and Mr. Kadokami
Auditor : Mr. Konashi©International Research Institute for Nuclear Decommissioning４

Projects of IRID
IRID gathers knowledge and ideas
from around the world for the
purpose of R&D in the area of nuclear
decommissioning under the
integrated management system.

R&D for
Decommissioning

R&D projects:･Fuel assemblies removed fromspent fuel pool･Preparation for fuel debris
retrieval･Treatment and disposal ofradioactive waste

Promotecollaboration for
Decommissioning
with Domestic andInternational
PartiesDevelopmentof Human Resource
for R&D©International Research Institute for Nuclear Decommissioning５

Schematic image of IRID ’s function<With perspective of enhancing technological basis for reactor decommissioning, focusing on
clear and present challenges of Fukushima Daiichi NPS decommissioning.>-Accelerating the decommissioning of Fukushima Daiichi NPS,
securing its safety and restoring its environment.
-Early recovery of the Fukushima area and the confidencebuilding among the nation.

-Preparation for future decommissioning and enhancing its
safety level.
-Incubating , accumulating and improving the related
technologies.

Council for the Decommissioning of TEPCO's Fukushima Daiichi
Nuclear Power Station

Electric Utilities
Plant Manufacturers(Chaired by Mr. Motegi, the Minister of METI)[HQ of all projects]

Presentation/report of R&D program

Presentation/report of
Mid & Long term Road Map

Feed back to future decommissioning projects

Research and Development Consortium,
International Research Institute for Nuclear Decommissioning
R&D execution entities

Secretariat (R&D management )TEPCO
Fukushima Daiichi
Decontamination
andDecommissioning
Engineering
Company

Deriveon-siteneeds
Practically
apply
results
Suggestplans andstrategies

Integrated management of
decommissioning technologies-Review and optimization of the strategy of overall
decommissioning program.
-Analysis of on-site needs and seeds oftechnologies,
coordination (optimization/matching).
-Coordination and guidance of respective
technology
development.
-Adoption of international & domestic advices.
-Exploration of potential technology.
-Enhancement of human resource development,
alliance among universities, etc.

Advices on technological and managerial aspects

Advices from domestic/international organizations

Plant Manufacturers
Japan Atomic Energy Agency
Guidewell- designed
development
Guide
collaboration&cooperation
Shareresults

National Institute of Advanced
Industrial Science andTechnology
Electric Utilities
Other Research Organizations

Participation to joint study, R&D, etc.

Partner organizations of joint study©International Research Institute for Nuclear Decommissioning

６Organizational chart
System receiving worldwide advices(Technology Advisory Committee,
International Expert Group etc.)

General Meeting
Board of Directors

International Advisors

Contaminated Water
Technology Review Team
Research Strategy Planning
Dept.

Fuel Debris Retrieval Technology Review Team

Research Promotion Dept.

International & Alliance Dept.

R&D management

Promotion ofinternational alliance

Administration &Labor management

Alliance ofdomestic/international
academic institutes

Accounting &Procurement

Controlling
Human resource
development

Information
management ofaccident/recovery

Public relations

Technology planning
officeFuel Debris Retrieval Gr.
Development team to
Identify leakage points of PCVDevelopment team to
repair PCV

Administration Dept.

Reactor Interior and Fuel Debris
Evaluation Technology Gr.

R/W Treatment Technology Gr.

Development team to analyze fueldebris characteristics

Development team to treat &dispose of secondary R/W fromcontaminated water treatment

Development team to control
criticality of fuel debris

Development team to treat &dispose R/W

７©International Research Institute for Nuclear Decommissioning

Present operation plan (R&D projects)
R&D to set up fuel debris retrieval

Estimation of inside of reactor using severe
accident analysis code

R&D for remote decontamination in reactor building
Development of technology for investigation of
inside of PCVDevelopment of repair and stopping water leakage
technology for leakage location of PCVDevelopment of technology for retrieval of fueldebris and in-core structures
Development of technology for investigation of
inside of RPVDevelopment of technology for evaluation ofsoundness of RPV/PCVDevelopment of technology for grasping ofcharacteristics and treatment of fuel debris
Development of technology for detection of fueldebris in reactor
Development of technology for packing, transfer
and storage of fuel debris
Development of repair and stopping waterleakage technology for leakage location of PCV
Full-scale test for repair and stopping waterleakage technology for leakage location of PCV

R&D for treatment & disposal of R/W
Development of technology for disposal of accident waste

R&D to retrieve SFs from SF pools
Evaluation of long-term soundness of fuel assembly, etc. retrieved from spent fuel pool
Consideration of treatment method of damaged fuel, etc. retrieved from spent fuel pool

©International Research Institute for Nuclear Decommissioning

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“Open Platform” to integrate knowledge from all around the world
Board of Directors

International Advisors
Advices from organizational governance &management aspects

Integrated management of
R&D projects

Alliance/collaborative
study with technology
partners, etc.
Procurement ofequipment, etc.
from technologicalvendors
Collaborative
studies withresearch institutes,
etc.

Needs atsite

Supply ofequipment

Joint study

International
collaborative projects*Planning of overall research strategy
for decommissioning.
*Coordination & optimization withregard to practical needs.

Joint business

Project -1

Sharing results

Project -2

Materialization of new
projects

Technologicaladvices

OECD/NEA- Accident analysis, etc.
IAEA
- Review missions- Others

International Expert Group

Discussions on innovative ideas, technologies and projects
Innovative ideas/ technology proposals

Companies, research institutes and others around the world©International Research Institute for Nuclear Decommissioning

９International Adviser and International Expert Group
Soliciting advices based upon findings & experiences of other countries

 Advices from the International Advisors on overall management at IRID .
•••-Mr. Lake Barrett (US)：Former NRC, Individual consultant. (Director of measures to contain the
TMI accident.)
Dr. Adrian Simper (UK)： Director of NDA
Mr. Luis E. Echavarri (Spain ): Former OECD/NEA Director-General
The 1st Meeting held on Jan. 9-10, 2014

 Technological advices from the International Expert Group•

Douglas Chapin (USA): President of MPR (experienced in restoration from TMI accident
and clean-up of the facilities.)• Dr. Rosa Yang (US)：Electric Power Research Institute(EPRI) Senior Technical Executive• Dr. Adrian Simper (UK)： Director of NDA• Dr. Joel Pijselman (France): Current Chairman of ETC (former Vice president of AREVA)• Mr. Nikolai Steinberg (Ukraine): individual consultant (involved in Decommissioning strategy ofChernobyl Nuclear Power Plant. )• Mr. Anton Leshchenko (Russia):Deputy Head of Research Department, Research andDevelopment Company. “Sosny” (engaged in the retrieval work of damaged fuel at Paks Nuclear
Power Plant)- The 1st Meeting held on Sep. 23-27 (Tokyo/Fukushima)- The 2nd Meeting held on Feb. 17-21, 2014 (Tokyo)- The 3rd Meeting held on Jun. 24-27, 2014 (Tokyo)©International Research Institute for Nuclear Decommissioning

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IAEA Review Mission
 IAEA International Peer Review on “TEPCO Mid-and-Long Term Roadmap for
Decommissioning of Fukushima Daiichi Nuclear Power Station Unit 1-4”
(Nov. 25 -Dec. 4, 2013)
IRID , along with METI and TEPCO, discussed with IAEA inspection team consists of 19
members and obtained following evaluation results.
 A comprehensive structure was developed, such as establishing IRID so as toutilize technical knowledge and technological capability around the world in orderto accelerate the decommissioning activities of Fukushima Daiichi Nuclear Power
Station more safely.
 The intension to incorporate international experience and to seek international
cooperation by having IRID participated was clearly confirmed.
 IAEA confirmed that TEPCO and IRID make contribution toward the developmentof remote control technologies to identify cooling water leakage in the PCV andrepairing the leakage. Application of the equipment to identify the leakage points
is a significant step for PCV isolation (leakage points closure) Establishing the working group (WG) for the development of remote control
equipment will shorten the time between identifying specific needs and thehanding over of the facilities assisted by each developed remote technology. For
example, after the WG was established, the time it took for the device detecting
the leakage inside the dry-well was 7-8 month. Participation of plant
representative to the WG will contribute to successful development.
©International Research Institute for Nuclear Decommissioning

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International Joint Project
IRID contributes to enhance the safety and decommissioning work of
nuclear faculties around the world through the international joint work.

 OECD/NEA BSAF Phase I
 Joint benchmark research on accident status of Fukushima Daiichi andcurrent condition of the core through the analysis codes including
improved version for severe accident analysis codes.
 Sharing common data and information database Project for the next stage (plan) BSAF Phase II with expanded scope (Hydrogen, MCCI etc. ) Sampling, analysis, and property identification of fuel debris
 Issues regarding the management of radioactive waste(methods of identifying and categorizing the properties and disposing
the waste material)©International Research Institute for Nuclear Decommissioning

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Evaluation of R&D ProjectTechnical Advisory Committee (Experts of third parties)
Role : Evaluate and advice on overall R&D strategy and the activities of IRID .
Chairperson: Satoru Tanaka (Professor of School of Engineering, University of Tokyo)
Committee member :Hajime Asama (Professor of School of Engineering, University of Tokyo)
Yutaka Watanabe (Professor of School of Engineering, Tohoku University)
Shinsuke Yamanaka (Professor of Graduate School of Engineering, Osaka University)
Osamu Tochiyama (Director, Radiation and Waste Safety Research Center, Nuclear Safety
Research Association)
Subcommittees(Evaluation of R&D
project)(1)Fuel debris retrieval
equipment/remote
operation technology*(2) Spent fuel ・PCV/RPV soundness
evaluation technology

Chairperson:
Hajime Asama

Chairperson:
Yutaka Watanabe(3)Technology ofidentifying internal
conditions /fuel debris
properties
Chairperson:
Shinsuke Yamanaka(4)Treatment/disposal
technology ofradioactive waste
Chairperson:
Osamu Tochiyama*Deliberate and propose solutions through integratingknowledge and experience of remote technology.
©International Research Institute for Nuclear Decommissioning

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Measurements against the contaminated water issue
In response to the 1st Inter-Ministerial Council for Contaminated Water and Decommissioning
Issues on September 10, a review team consisting of the related experts mainly from IRID has
been established to implement concrete measures for contaminated water issues.
Solicitation for domestic/foreign technologies, gathering information and classification/sorting of
the proposed technologies will be implemented. The results will be then reported to thegovernmental “Committee on Countermeasures for Contaminated Water Treatment.”<Schedule>
Sep. 20: A website to solicit the technology proposals started. www.IRID.or.jp/cw
Oct. 2: An explanatory meeting on solicitation for the technology proposals(at Iino building, Tokyo).
Early Oct : Information exchange with the foreign organizations, etc.
Oct .23: Deadline for proposals.
Late October to early November: Classification/sorting of the technology proposals.
Nov.15: Report to the Committee on Countermeasures for Contaminated Water
Treatment
Dec.10: Summarize Report to the Committee on Countermeasures for Contaminated
Water Treatment©International Research Institute for Nuclear Decommissioning

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Gathering knowledge on contaminated water issue around the world( Contaminated water treatment committees meeting)■ Call for technical proposal◇ An expert team established mainly by the International ResearchInstitute of Nuclear Decommissioning(IRID ) to gather knowledge fromexperts around the world collected the technical proposal. (application
period: Sep. 25-Oct. 23.)
◇ Ideas submitted were evaluated mainly by "contaminated water
treatment committees” to reflect to the preventive and multilayered
measurements on contaminated water .
■ Status of submitted idea
◇Total number of proposals submitted was 780. Details are as follows.

(Note 1) Field of proposal was selected by applicant.
(Note 2) Some of the proposal submitted for one filed were
subject to multiple fields.

◇Large picture of countermeasure technology for contaminatedwater can be overlooked by the technical proposal from around theworld, and all the proposals submitted are valuable data.
◇Following technologies are extracted in reference to the level oftechnological maturity, urgency of measurement, and applicability
to the site etc.
(1) Technology which should be utilized as soon as possible after
confirming applicability to the actual site
 Large size tank with high credibility , like Double steel shell tank etc.
 Light-weight shielding sheet without lead
 Pollution preventing membrane(silt fence) Water stoppage technology (water stoppage inside the building,
stoppage of the water around the building) Maintain geological condition, ground water investigation,observation network etc.
(2) Technology which should be utilized after selecting execution
method in consideration of workability and cost effectiveness etc.
 Countermeasure technology water shielding (phasing , water
shielding etc.)(3)Technology whose that are expected to be effective but need
confirmation and verification before utilization.
 Small leak detection technology (including dose rate) Tank decontamination technology without using water Tritiated water storage ・separation technology
 Purification technology for seawater inside the bay Filter in the ground (capturing technology of strontium in soil) Unmanned boring technologyetc.
(4) Items to be addressed based on the verification results ofcontaminated water treatment committees.
 General evaluation for tritiated water Examination(?) of problems regarding tanker, underground storage
etc.

©International Research Institute for Nuclear Decommissioning

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TEPCO’s approach to utilize responses to RFI for contaminatedwater issues■ In “Preventive and Multi-layered Measures for Contaminated Water of Fukushima Daiichi Nuclear Power Plant of Tokyo Electric Power Co. – Through Comprehensive
and Through Risk Management”, technologies to be utilized based on compiled RFI responses are summarized as below.
■ Responses to respective items are as follows:No.

Items described in report by Secretariat of the Team for
Decommissioning and Contaminated Water Countermeasures
Cabinet Office

Status○ Reliability improvement and scaling up of tank(Double steel shelltank, etc.）

12Techniquerecommended to use
immediately

Techniquerecommended to use
after selection of suitable
method○ Light-weight shielding sheet free from leadTechnique tocheck/verify

AdoptedReliable, large-size tanks

Underverification

Measures to prevent water leakage from tanks

AdoptedShielding sheet free from lead

○ Pollution preventive membrane (silt fence, etc.)

To be adopted

Seawater purification using absorbent○ Water stop technique (building internal water stop, building
peripheral water stop)

To be verified

Water cutoff materials used in and around buildings○ Survey of geological condition and underground water,
improvement observation network

To be adopted

Water path detection layer and single-hole flow rate anddirection measurement technologies○ Technique of water-shielding (Facing of the site , peripheral water
shielding measure)

Underconsideration

Facing technologies of the slope○ Microleakage detection technique (dye included)

Underverification

As a result of comparative study, technological items otherthan responses to RFI (plastic scintillation fiber) are underverification.

○ Decontamination technique free from water.
3

Action / verification items○ Purification of sea water in the harbor

RFP for entities to implement with subsidies the “Validation oftechnologies for contaminated water management” project in the FY2013 is carriedout.

○ Technique to collect strontium in the soil (near tank area)

To be adopted○ Technique to collect strontium in the soil (near embankment area)

RFP for entities to implement with subsidies the “Validation oftechnologies for contaminated water management” project in the FY2013 is carriedout.

○ Unmanned boring technique

Capturing and collecting Sr in the soil (near tank area)○ Overall evaluation of handling of tritiated water4

Evaluation /Study○ Study on the possibility of responses to the problems such as afloating tanker, underground storage

To be studied in the future in accordance with arrangements by tritiated water task
force, etc.

From home page of the Agency of Natural Resources and Energy:<Excerpts from “Situation of Use and Study of the result of RFI for addressing the contaminatedwater issue at Fukushima Daiichi Nuclear Power Station”, Document 6-2,
the 12th Committee on Countermeasures for Contaminated Water Treatment >©International
Research©International ResearchInstitute for Nuclear Decommissioning
Institute for Nuclear
17
DecommissioningPromoting fundamental studies and human resource development
・Promote the fundamental studies in alliance with universities, research institutes and so forth tosecure human resource and its development from mid-to-long term perspective.
・Through hosting workshops in cooperation with the Ministry of Education, Culture, Sports, Scienceand Technology (MEXT), disseminate and share the information on R&D programs, as well as
considering areas and tasks of any fundamental studies to be focused on that meet practicalneeds.
(Workshops hosted)
Hosted a series of workshops on R&D programs and fundamental studies.
- 1st (September 25, Kanto-1): R/W, Fuel debris.
- 2nd (October 8, Fukushima): Development of remote controlled equipment and device, Datavisualization.
- 3rd (November 1, Kansai/Western Japan-1): R/W, Fuel debris.
- 4th (November 20, Tohoku/Hokkaido): Integrity of PCVs, etc., R/W.
- 5th (November 26, Kanto-2): Development of remote controlled equipment and device.
-6th (Dec. 20, Kansai/West Japan-2):Development of remote controlled equipment and device.
-7th (Dec. 25, Hokuriku-2): Integrity of PCVs, etc., Fuel debris.
Development of remote controlled equipment and device.
-8th (Jan 18, Chubu): Integrity of PCVs, development of remote controlled equipment and device
Fuel debris, R/W.
-9th (Jan. 22, Kanto-3): Fuel debris, material, R/W, and analysis-related issue.
©International Research Institute for Nuclear Decommissioning

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Basic Research for Decommissioning etc. and Human Resource Program
Creation of new knowledge on mid-and-long-term decommissioning etc., and development and securing the human resource
development are required through the countermeasures on TEPCO’S Fukushima Daiichi accident.
⇒ In collaboration with International Research Institute for Nuclear Decommissioning, implement basic research by gatheringknowledge and ideas from various fields of research institute such as of universities for the priority area regarding human resource
development defined by the Council for the Decommissioning from perspective of human resource of Mid-and-long term andcreate the deliverables which can contribute to the decommissioning site and human resource development.
Decommissioningof Fukushima
Daiichi

IRID(2)-3 Provide technology(2)-1 Disclose

Integrated managementfor R&D for
decommissioning of Fukushima
Daiichi gathering knowledge
from around the world.

(7) Createdeliverables that
contribute to thedecommissioningsite and humanresource development.

Council for the Decommissioning of Fukushima Daiichi
Deliberate and determine thecritical issue on Decommissioning(1) Needs of the site

2. Can be developed with current
technology

3. basic researches requiring Mid-and-longterm human resource developed
4. Verification(2)-2 Report

Technical
Technical issue
issue･Integrity･Integrity andand reliability
reliability ofof containment
containment vessels/
vessels/ building.
building.
Issue (1):(1): XXXX
XXXX
Issue
･Development,･Development, verification
verification andand operation
operation ofof remoteremote equipment
equipment /device.
/device.
Issue
(2)
:
XXXX
Issue (2) : XXXX
5. Public offering by Ministry of
Education, Culture, Sports, Science and Technology,
a member of council of decommissioning

Basic research of decommissioning/human resource development program
Hub : XXX Univ.
Collaborative
R&D

Collaborative
R&D(8) Provide
deliverable
obtained bydecommissioning
foundation andhuman recourse
development

Hub : XXX Univ.
Collaborative
R&D

Collaborative
R&D

Collaborative
R&D

Collaborative
R&D

Human resource development required fordecommissioning of Fukushima Daiichie.g.) Learn risk communication
Identify mid-and-long-tem roadmap etc.
©International Research Institute for Nuclear Decommissioning

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R&D schedule
Having completed Phase 1 of Mid-and-Long-Term Roadmap, R&D will be addressed as follows fromthe Phase 2.
1. Promotion of long-term R&D in response to the start of fuel removal from spent fuel pool.
2. Development of multilateral・multilayered method and equipment for full scale preparation offuel debris retrieval(1) - Submersion method3. Development of multilateral・multilayered method and equipment for full scale preparation of .
fuel debris retrieval(2) - Alternative method4. Stable promotion of R&D inconsideration of treatment and disposal of radioactive waste, anddecommissioning.
December 2011
(Roadmap established)
Efforts to stabilize
plant condition<Achieve cold
shutdown>• Cold shutdown state• Significantly reduceradiation releases

2020-

November 2013

Phase 1

Phase 2

Period up to thecommencement of
the removal of thefuel from the spent
fuel pool (within 2
years)

Period up to thecommencement of theremoval of the fuel debris(within 10 years)

30 to 40years
in the future

Phase 3
Period up to thecompletion of
decommissioning measures(30 to 40 years in the
future)Now
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R&D Activities of IRID
■ R&D activities to be carried out in order to meet severe conditions of reactor
buildings at Fukushima Daiichi.
High dose rate

High temp.

High humidity

RubbleElevated places

Underwater

Narrow places

Injection ofsea water

R&D for fuel removed fromspent fuel pools

DS pitSpent fuelpool
Steam Dryer
Steam
Separator

Reactor pressure
vesselEquipment Hatch
Debris

R&D for treatment anddisposal of R/W

R&D for preparation forfuel debris removal

Primary
containment vessel
Torus room

2014/7/17

WM'14 - session 84©International Research Institute for Nuclear Decommissioning

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1. Promotion of study from long-term perspective in response to
the start of fuel removal from SFP･Fuel removal from spent fuel pool at Unit 4 was started on Nov. 18, 2013.
･Soundness of transferring these fuels and storage was approved by TEPCO.
･IRID established evaluation method for soundness of long-term storage at the common pool(corrosion resistance etc.), regarding this as one of IRID’s research targets, byobtaining verified data from the fuel at the actual unit. The results obtained from theresearch will be reflected to the actual evaluation.
＜Major activities＞－ Establish test conditions for the long-term soundness evaluation based on the result of
trial examination within 2013
－Also, conduct corrosion test for fuel material, strength test, technology of water quality
effect evaluation.

・In addition, a research on the index for judging the possibility of reprocessing the retrieved
damaged fuel, while taking the adhesion of salt contained in the seawater and physicaldamage by the rubbles into consideration, is ongoing.
＜Major activities＞－Aiming to obtain the research results in 2017, in order to determine the methods of the
spent fuel management and storage based on the case study conducted overseas in2013.

©International Research Institute for Nuclear Decommissioning

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2. Method and equipment in preparation of implementation offuel debris retrieval (1) ‐Submersion method‐(１) Acceleration of investigation and repair (water stoppage) technology development in repose to thecase of water flowing around the lower part of containment vessel
・ Water flow around the containment vessel at Unit 1 was confirmed from the research result obtained by
the remotely operated boat developed through the task force of remote operation technology (Nov. 1314, 2013) .
・Based on this result, aiming at accelerating the process including the investigation for other units in
preparation of development of remote equipment for Investigation and repair of lower part ofcontainment vessel (water stoppage) that IRID promote .
＜Major activities＞－ In FY 2013, continued development of investigation and repair (water stoppage)equipment, andaiming at conducting demonstrations this year while reviewing the development plan (target andprocess) based on the actual conditions.
－ In FY 2015, aiming at conducting demonstrations at mock-up facilities and on site.

－ Also, establishing remote operation subcommittees (tentative name) in IRID technical committees
and build the structures to receive advice for the development and site operation as well as evaluating
the research projects.

©International Research Institute for Nuclear Decommissioning

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Work image of the fuel debris removal■The approach of removing the fuel debris submerged in water is the safest
approach from the standpoint of minimizing exposure of workers.
■The primary containment vessel (PCV) will be examined and repaired forfilling the PCV with water. Furthermore, R&D for the fuel debris removal andstorage will be implemented.
removing the fuel debris （image）
Overhead craneRepair of lower part of PCV（water stoppage）～water filling （image）

Spent Fuel
Pool (SFP)

Spent Fuel
Pool (SFP)

Reactor Pressure
VesselFilling water

Building cover

Reactor Pressure
VesselPCV

Stopping water
Torus room

PCV

Torus room

PCV

Torus room

©International Research Institute for Nuclear Decommissioning

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３. Development of multilateral and multilayered method andequipment in preparation of implementation of fuel debris retrieval(2) ‐Innovative approach‐(２) Innovative approach and Request for Information of technology for theidentification of fuel debris condition and acceleration of retrieval
・Mid-and-long-Term Roadmap states that the innovative approach other than
Submersion method shall be considered. Therefore started Request for Information(RFI) to seek information from overseas research institutes and corporations, aiming toconduct feasibility study (Ｆ/Ｓ, after 2015) of the technologies to identify the locationand the condition of the fuel debris required for the methods of investigation andretrieval work.
・Information submitted will be utilized for Conceptual Study and Technical feasibility
study (Ｆ/Ｓ).
・IRID expect this RFI to be an opportunity for collaboration with related parties
around the world.

©International Research Institute for Nuclear Decommissioning

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Contents of RFI
Topic A: Internal PCV/RPV investigation
A-1:Conceptual study of method (following aresamples)

1. Method of inserting investigation device e.g.
cameras inside.
a. Utilize current throughbore such as
piping/penetration.
b. Create new throughbore .
c. Methods of shielding penetrations and of
equipment operation in terms of reduction ofradiation exposure.
2. Method of detecting fuel debris location bymeasuring from outside, etc.

A-2:Required technologies (following are samples)
1. Advanced measurement technology (e.g. camera,
dosimeter, thermometer)
a. High performance optical equipment(e.g.
camera), other measurement technology (e.g.
ultrasonic, laser)b. Control technology of measuring instrument,
and information transmission technology .
2. Technology to detect whether the substance in thereactor is fuel debris or not.

Topic B: Fuel debris retrieval
B-1:Conceptual study of method (following aresamples)
1. Access to fuel debris from the top of PCV underwater
2. Access to fuel debris from the top of PCV in the air*1
3. Access to fuel debris from the side of PCV in the air*1
4. Access to fuel debris from the bottom of PCV in the air*1*1 including partial submergence

B-2:Required technologies (following are samples)
1. Technology regarding fuel debris retrieval (cutting,suction).
2. Equipment/device such as remote control manipulator,
with superior control capability from long distance.
3. Technology of shielding against fuel debris withhigh radiation.
4. Device and equipment capable of working under the highradiation environment.
5. Equipment/device to create a borehole on thebuilding concrete and PCV to enable access from the sideor bottom of the PCV.
6. Technology to store fuel debris safely in PCV/RPV
before retrieving.

©International Research Institute for Nuclear Decommissioning

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e.g. Fuel debris retrieval work (from top and side)

Fuel debris storage canRetrieve from the top

carry out

Retrieve from the side

Containment vessel
Torus room
Fuel debris retrieval©International Research Institute for Nuclear Decommissioning

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Results of RFI
About 60% and 40% of the proposal were submitted from Japan and overseas countries respectively

Total

JPN

US

Breakdown by country
GER FRA
UK
BEL

33

20

7

3

-

2

-

1

-

A-2:Required
technology

58

32

6

10

6

2

2

-

-

B-1:Conceptual
study
for the method

43

23

8

3

2

5

-

1

1

B-2:Required
technology

60

41

7

3

4

2

2

-

1

Total (No. of items
of information)

194

116

28

19

12

11

4

2

2

Topic A
Internal PCV/RPV
investigation•Field of proposal for RFI
A-1:Conceptual
study for the
methodCAN

RUS

Topic B
Fuel debris
retrieval©International Research Institute for Nuclear Decommissioning

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4. Stable promotion of R&D from the perspective of radioactive
material treatment and disposal• Conducted radionuclide analysis of sampled rubbles, felled tree and contaminated water among
other specimens from the site. Currently working on inventory evaluation of waste material basedon the results of these nuclide analysis.
• Further accumulation and evaluation of analysis data are planned. In addition, a prospect of theadsorption vessel of waste zeolite generated by contaminated water treatment maintaining its
soundness at the salt concentration level in the storage condition has been already confirmed.
＜Major activities＞－ Continue studies on the technologies for storage, identifying the properties, waste forming anddisposal to secure a prospect of maintaining the safety of the treatment and disposal of solid
waste－ Examine and establish the decommissioning scenario by collecting and organizing the conceptsof security control for the decommissioning from 2014.
－ For the issues with relatively high risks which are required to be addressed promptly, according
to the progress of decommissioning, promote studies flexibly while taking account of relations
with R&D plans defined in the Mid-and-Long-Term Roadmap and the priorities
For example, stabilization of the watery waste material such as slurry coprecipitation with iron and slurry of settled carbonate,
which are expected to be generated by ALPS as countermeasures for the contaminate water, shall be promoted forthwith.
©International Research Institute for Nuclear Decommissioning

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Summary
1.

IRID was established in Aug. 2013 as an integrated organization to conduct researches bygathering knowledge around the world according to the Mid-and-Long-Term Roadmap.

2.

As for R&D, IRID conducts an integrated management to promote multiple R&D projects
effectively. Fields of the R&D consists of following three. IRID also plans a total strategy of
the technologies required for the decommissioning by optimizing the on-site needs andtechnological seeds.
1. Removal of fuel from spent fuel pool
2. Preparation of fuel debris removal
3. Treatment and disposal of radioactive materials

3.

For the purpose of gathering knowledge around the world , IRID advances theestablishment of a structure to receive advise from the experienced experts around theworld through “International Advisors”, “Technology Advisory Committee” and“International Expert Group”, as well as considering the involvement in the joint research
project through OECD/NEA and responding to the IAEA review. Also, conduct Request for
Information (RFI) internationally for the countermeasures on contaminated water andfuel debris retrieval.

4.

Hold workshops to build a structure to promote basic researches in collaboration withresearch institutes and universities with Mid-and-Long-Term human resource
development in consideration.

©International Research Institute for Nuclear Decommissioning

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