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Interim Storage Facility

What is an Interim Storage Facility (ISF)?

  • In Fukushima Prefecture, large quantities of contaminated soil and waste have been generated from decontamination activities.
  • Currently, it is difficult to clarify methods of final disposal of such soil and waste.
  • Until final disposal becomes available, it is necessary to establish an Interim Storage Facility (ISF) in order to manage and store soil and waste safely.

The following materials generated in Fukushima Prefecture will be stored in the ISF.

Estimated Volume in the Interim Storage Facility

Estimated volume of generated soil, etc. from decontamination work (in case of 22 million m3)

Reception/Separation/Soil Storage Facility

  • Soil storage facility started the operation in December 2017 in both Okuma and Futaba

Transportation to the ISF

  • In FY2017, approx. 500,000m3 of removed soil is targeted to be transported
  • In FY2018, approx. 1,800,000m3 of removed soil will be transported to the ISF
  • Safe and secure transportation will be sequentially conducted managing whole numbers of transport objects,managing traffic of trucks, and implementing environmental monitoring, and etc.

< Actual achievement in FY2017 >As of March 17, 2018

  • Stored volume: 513,135m3 (742,251m3 in total)
    * Calculated on the assumption that the volume of a large bag is 1 m3
  • Total number of trucks used: 85,071 (123,109 in total)

Facilitation of bags at Stock Yards

Operation of a truck screening

8 Steps towards the Final Disposal outside Fukushima Prefecture within 30 years from the Start of the ISF

  • MOE conducts R&D to examine how the final disposal to be implemented taking into account the effect of radioactive decay and the potential of volume reduction and recycling
  • MOE disseminates, for public understanding, the information on recycling less radioactive material and the final disposal outside Fukushima Prefecture

Status of Planned Site for the ISF

As of the end of February 2018

Aspect for 5year Ad-hoc Policy on Interim Storage Facility (1)

< Concept of estimation >

  • Area for land acquisition will be estimated flexibly according to explanation phase to the landowners
  • To construct facilities, it will need comprehensive area and 2/3 will be assumed to be used for facilitation. The possible volume for installation is to be 10,000㎥/ha and 140,000m3/5ha for a storage facility, and will be installed from TSS to ISF sequentially
  • Approximate period from contract with operators to ISF operation: 3months for TSS, 6months for delivery & classification, 12months for storage, 18months for incineration
  • On the premise that infrastructure construction on roads for Okuma and Futaba IC would proceed as planned, the maximum volume of possible transportation is estimated: 2mil. m3 /y before the operation of both IC, 4mil. ㎥/y after Okuma IC & before Futaba IC, 6 mil. ㎥/y after the both ICs operation

Aspect for 5year Ad-hoc Policy on Interim Storage Facility (2)

Technology Development Strategy for Volume Reduction & Recycling of Decontamination Soil

  • Towards the final disposal of decontamination soil outside Fukushima Pref., MOE will promote recycling of the soil treated by volume reduction technology as much as possible, which consequently would lead to reduce the volume of soil for the final disposal
  • To clarify the objectives and priority of technology development and volume reduction & recycling, basic technology development is planned to be completed within 10 years, then move onto a phase of treatment
  • On the premise of securing safety, MOE will try to realize the recycling from the possible field, building public consensus for the safety
  • Based on technology development and prospect of recycling in future, MOE would propose some options for structure and necessary dimension of the final disposal

Concept on Safe Use of Recycled Materials

< Basic Concept >

The contaminated soil should be used mainly for public projects as the controlled materials (with radioactivity level below 8,000Bq/kg in principle and set according to purpose) after necessary treatment, e.g. removal of debris, classification treatment, and be managed by the public authorities.

< Limited Use >

The use will be limited such as basic structure material of banking for coastal levee, seaside protection forest, or embankment materials for roads, which assumed not to be changed the form artificially for a long time period. It will be also used as covering soil for waste disposal site.

< Management by the public authorities >

  • The criteria should be formulated based on the Act on Special Measures and be managed by MOE and public entities (municipalities, etc.)
  • To be specific, in order to confine additional exposure dose as below 1mSv/y at the time of construction and below 0.01mSv/y at the time of service, radioactive level of recycled materials should be limited, covering soil should be installed, scatter and leakage should be prevented, ground form change should be observed, and the data should be recorded.

< Procedure of recycling >

To realize the recycling of contaminated soil, demonstration and model projects based on concepts above should be implemented keeping the safety against radiation, studying specific verification of management method, and building stakeholders’ understandings.

Technology Development of Volume Reduction and Recycling after the Interim Storage

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