RFI for Innovative Approach for Fuel Debris Retrieval

Workshop for R&D on Innovative Approach for Fuel Debris Retrieval will be held on Friday, April 25, 2014 13:30-16:30. Details>>

RFI for Innovative Approach for Fuel Debris Retrieval was closed on January 31st, 2014. We have received approximately 200 responses. Thank you very much for your cooperation. Summary of responces to the RFI are uploaded on this page.

Responses to the RFI will be analyzed and sorted out by the IRID special team as well as external experts by the end of March 2014, and used for discussion items and specifications of Request for Proposal (RFP) for Conceptual Study(C/S) and Feasibility Study (F/S) on the R&D project planned around the end of April, 2014. In addition, we are planning to hold a project workshop regarding the RFP in Tokyo and overseas.

We would like to inform you of the detailed plan on our website at a later date. If you have any inquiries regarding the contents of this RFI, please contact us at the following email address:



As fuel removal from spent fuel pool (SFP) at Unit 4 has started on November 18, 2013, “Mid-to-Long Term Roadmap (RM) on decommissioning of Fukushima Daiichi Nuclear Power Station” has shifted into the Phase-2.

The goal of the Phase 2 is to start fuel debris retrieval from reactor core expected in 2020. Necessary onsite works and associated R&D programs should be accelerated. From TMI-2 experience, retrieval of fuel debris is envisaged to be conducted by full submersion approach, in order to minimize workers radiation dose.

The latest RM, revised on June 27, 2013, emphasizes the importance to:

- Work to accelerate milestone by outlining RM of each unit,

- Plan innovative approaches considering the challenges of full submersion methods, and;

- Build strong R&D management foundation.

IRID was established on August 8, 2013 to strengthen capability of integrated management of a series of ongoing R&D projects, recognizing;

- Difficulties and complexity in dealing with unexperienced challenges,

- Necessity of multi-fold approach, including study of innovative method, and;

- Importance of international collaboration.

To ensure multi-fold approach as well as to enable technological breakthroughs, collective knowledge and experience via interactive platform is to be pursued. This will also benefit enhancement of safety and decommissioning of nuclear facilities all over the world.

The RFI on fuel debris retrieval is one of the IRID’s project that embodies our goal.

Objectives of the RFI

The purpose of this RFI is to solicit information from industry, academia, and government affiliated agencies on issues related to designing innovative approaches to fuel debris retrieval, as well as to identifying technologies required to achieve the objectives.

Please be advised that this RFI not a funding opportunity announcement but solely a request for information.  Responses to the RFI will be used only for planning new programs on the next phase. IRID expects to launch new R&D programs in addition to current R&D projects. Preceding conceptual study (C/S) and technology feasibility studies (F/S) will be initiated from spring/summer of 2014, though it is subject to the governmental and Diet direction of budgeting and approval.

In addition, we wish this RFI initiative encourages collaboration and alliance with worldwide fellow colleagues.

Items for the RFI


Topic-A: Internal PCV/RPV Investigation

A-1 : Conceptual study on alternative approaches [example]

  • Conceptual ideas to put investigation equipment such as cameras into PCV/RPV
  • Methods of estimating the position of fuel debris by measuring from outside of PCV

A-2 : Technologies required for internal PCV/RPV investigation  [example]

  • Advanced measurement technologies (camera, dosimeter, thermometer etc.)
  • Technology of identifying whether a material in the core and PCV is debris or not by evaluating its nature


Topic-B: Fuel-debris retrieval from PCV/RPV

B-1 : Conceptual study on innovative approaches to fuel debris [example]

  • Accessing and removal of fuel debris from Top side of PCV/RPV under water
  • Accessing and removal of fuel debris from Top side of PCV/RPV in atmospheric condition
  • Accessing and removal of fuel debris from   lateral side of PCV/RPV in atmospheric condition
  • Accessing and removal of fuel debris from   bottom side of PCV/RPV in atmospheric condition

B-2 : Technologies required for fuel-debris retrieval  [example]

  • Technologies especially required for the innovative approaches (Approaches from atomospheric condition)


The webform for submission has been closed.
Terms and Conditions of RFI


Inquiries regarding this RFI may be directed to IRID via E-mail at:


International Research Institute for Nuclear Decommissioning

Park Place 6FL. 5-27-1 Shimbashi, Minato-ku,

Tokyo 105-0004 Japan

+81-3-6435-8625 (JST 9:00-17:00)