graph JAEA
Taking on the challenge ofreactor decommissioning
Naraha Remote Technology Development CenterNo.

9January 2017
Japan Atomic Energy Agency

Taking on the challenge ofreactor decommissioning

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Naraha Remote Technology Development
Center in Fukushima Prefecture
JAEA’s site of operations in Fukushima Prefecture (as of January 2017)
Fukushima Environmental
Safty Center（Minamisoma City ）Covers work related to researchand development into remotemonitoring technologies.

Fukushima Office（Fukushima City）
Coordinates JAEA activities inFukushima Prefecture with the relevant
Fukushima Prefecture authorities.
Fukushima Environmental Safty Center（Miharu Town）
Conducts environmental impact studies andR&D into decontamination and reduction ofradioactive waste to assist withenvironmental restoration efforts.

Fukushima Daiichi
Nuclear PowerStation,Tokyo ElectricPower CompanyHoldings(Fukushima DaiichiNPS)

Okuma Analysis and ResearchCenter（Okuma Town） ※Under construction
Conducts analysis and research of
Fukushima Daiichi NPS rubble, fueldebris and other objects.
Collaborative Laboratories for Advanced Decommissioning Science
Office for Tomioka Collaborative Laboratories（Tomioka Town） ※Under construction
To ensure Fukushima Daiichi NPS decommissioning
work progresses safely and according to schedule,experts from Japan and around the world conduct R&Dand provide training to personnel.

Naraha Remote TechnologyDevelopment Center（Naraha Town）
Conducts development and testing ofremote equipment (such as robots) requiredfor progressing with Fukushima Daiichi NPS
decommissioning work.

Iwaki Office（Iwaki City）
Provides office functions for JAEA
activities in Fukushima Prefecture, andcoordinates work with R&D facilities in theHama-dōri region and Ibaraki district.

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Three facilities at Naraha Remote Technology
Development CenterResearch Management
BuildingMock-up Test Building

Reactor primary containment vessel (PCV)（same type reactor as
Fukushima Daiichi
NPS Unit 2）

1/8 sector mock-up

PCV lower-section repair
technology testing area →p.6

Mock-up stairs

作業者や操作員訓練のためのバーチャルリ
アリティシステム→p作業者や操作員訓練のためのバーチャルリアリ
Virtual reality system for training
ティシステム→p.3
workers and remote device.3
operators→p.5

Motion capture system

Robot testing pool

Remote controlled device testing area→p.7～94

Generates a virtual 3D view within the reactor building, and is used fordeveloping procedures for remote controlled devices as well as training ofworkers.

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The International Research Institute for Nuclear Decommissioning (IRID) uses the mock-up reactor primarycontainment vessel (PCV) lower-section for full-scale testing, for demonstration experiments of repairs to leaking
areas and technologies to combat water leakage.
Photo above shows the mock-up testing area during construction; photo below is an internal view (source: IRID)

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Overall image

Provides a mock-up of underwater sections within the reactor building with varying conditions
such as temperature changes (from normal temperature to around 60℃), salt water and turbidity,
to test the operation of underwater robots.

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Studying the conditions within the reactor building is the first step required when moving
forward with decommissioning.
There are a range of staircases in the reactor building with different widths and gradients. This
mock-up simulates the different staircases as part of assessments for robotic devices.

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The movement of robots such as drones are captured with 16 high-speed cameras andsaved as digital data for use with quantitative motion analysis.

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TOPICSThe First Creative Robot Contest for Decommissioning
held for personnel trainingThe “First Creative Robot Contest for Decommissioning” was held at the Naraha
Remote Technology Development Center by the Ministry of Education, Culture, Sports,
Science and Technology, and the Decommissioning human resource development
consortium on December 3, 2016. Students from 13 technical colleges around thecountry pitted their ideas and technical capabilities to achieve objectives such as
carrying objects up stairs based on the actual conditions present within the actual
reactor building: being unable to see the actual robot, or signals failing to reach therobot due to thick concrete walls.

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graph JAEA
02 Taking on the challenge of reactor decommissioning
03 Naraha Remote Technology Development Center in Fukushima Prefecture
04 Three facilities at Naraha Remote Technology Development Center
05 A 3D look into the reactor building
06 PCV lower-section mock-up
07 Mock-up of underwater sections within the reactor building
08 Reactor building Mock-up stairs
09 Closely monitoring robot movements
10 TOPICS The First Creative Robot Contest for Decommissioning
Naraha Remote Technology Development Center is a facility that conducts development and demonstration
testing of remote controlled devices (such as robots) for decommissioning efforts for the Fukushima Daiichi NPS
as well as disaster relief measures. Members of the general public are welcome to use the facilities, andapplications for use can be sent via the homepage.
Naraha Remote Technology Development Center homepage:：http://naraha.jaea.go.jp/en/

graph JAEA backnumber https://www.jaea.go.jp/english/publication/

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graph JAEA
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Public Relations Section, Japan Atomic Energy Agency
Funaishikawa 765-1, Tokaimura
Naka County, Ibaraki Prefecture
Postal code: 319-1184
Telephone: 029-282-0749
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