27aA01
幅広いアプローチ（BA)活動の現状と最近の成果
Present Status and Achievements of Broader Approach Activities
奥村 義和
Yoshikazu Okumura
日本原子力研究開発機構
Japan Atomic Energy Agency
Introduction
Five years have passed since the Broader Approach(BA) activities launched in June 2007 under theframework of collaboration between Japan andEURATOM. The BA activities aim at complementing
the ITER project and at an early realization of fusionenergy by carrying out R&D and developing someadvanced technologies for the future demonstration
power reactor (DEMO). The BA activities consist ofthree projects. They are 1) Engineering Validation andEngineering Design Activities for the International
Fusion Materials Irradiation Facility (IFMIF/EVEDA)
project, 2) International Fusion Energy ResearchCenter (IFERC) project, and 3) Satellite Tokamak
Program (STP) project.
A new research site was established in Rokkasho,
Aomori, for the IFMIF/EVEDA and the IFERC
projects. The site is named “International Fusion
Energy Research Center”. Construction of theinfrastructure including three research buildings wascompleted in March 2010, followed by the installationof research facilities and equipments. At present,
about 180 people are working at the IFERC site.

target facility with 1/3 width of the lithium jet and 3) afull mock-up for High Flux Test Module (HFTM).
Construction and commissioning of the prototype
lithium test loop was completed in March 2011 at
JAEA Oarai, and a lithium flow of 25 mm thick at 15m/s was obtained in July 2012. Components of theprototype accelerator are being fabricated in European
institutes; CEA Saclay in France, INFN in Italy, andCIEMAT in Spain. Injector has already been
manufactured at CEA Saclay and will be delivered inRokkasho in March 2013 followed by the validation
test of the accelerator. The intermediate engineering
report of the IFMIF facility will be delivered by June2013.

Fig. 2 Lithium flow of 15m/s was obtained in theprototype lithium loop constructed at Oarai.
Fig. 1. International Fusion Energy Research Centerestablished in Rokkasho, Aomori.
IFMIF/EVEDA Project
The objectives of the IFMIF/EVEDA projects are toproduce an engineering design of the IFMIF plant andto validate the main challenging technologies. Theyare 1) a full current (125mA/CW) prototype
accelerator up to an energy of 9MeV 2) Prototype

IFERC Project
The IFERC project consists of three sub-projects; 1)
DEMO Design and R&D Coordination Center 2)
Fusion Computer Simulation and 3) Remote
Experimentation Center (REC). Five R&Ds mainly
on DEMO blanket are being carried out at a newly
constructed DEMO R&D building. The DEMO R&D
activities have been conducted under the strong

collaboration with Japanese and European laboratories
and universities. In Japan, 18 universities and 2
institutes shown in Fig. 3 have involved in the DEMO
R&D activities under 35 contacts between JAEA andthe universities/institutes in 2012.
DEMO Design Activities (DDA) has entered a joint
work stage since January 2011. An integrated Project
Team is constituted by the union of the DDA unit ofthe IFERC Project Team, European Home Team, andJapanese Home Team.

magnet, power supplies, TF coil test), ENEA in Italy(TF magnet, power supplies, TF coil test) andConsorzio-RFX in Italy (power supplies), KIT in
Germany (high-temperature super- conducting currentleads), CIEMAT in Spain (cryostat), and SCK-CEN in
Belgium (TF coil test).
Two new buildings; coil winding building andjacketing building were constructed at Naka in 2009
for the procurement of the superconducting coils. Themanufacturing of the EF4 coil was completed (see Fig.
5) and the manufacturing of the EF5 and EF6 has
started. The first 40 degree Vacuum Vessel sector
was delivered to Naka in March 2011. Up to now,
three 40 degree sectors (120 degree) have beendelivered. Another 120 degree sectors will be deliveredby March 2013.

Fig. 3 Japanese universities and institutes involved in
the DEMO R&D activities
A high performance supercomputer with a LINPAC
performance of 1.27 Pflops is now operational sinceJanuary 2012 for the fusion simulation.
Fig. 5 Manufacturing of the EF4 coil was completed.
After shutting down the existing JT-60 in August
2008, disassembling of the JT-60 started in November
2009. This is the first experience of disassembling aradio-activated large fusion device in Japan. The
disassembly will be completed by the end of Oct. 2012.
Manufacture of tokamak components such as acryostat are being fabricated on schedule. JT-60SA
construction will start in Jan.2013.

Fig. 4 Supercomputer ‘Helios’ in Rokkasho.
Satellite Tokamak Program (JA-60SA)
The mission of the JT-60SA project, which is also
undertaken as the Japanese national program, is tocontribute to the early realization of fusion energy bysupporting the exploitation of ITER and bycomplementing ITER with resolving key physics andengineering issues for DEMO reactors.
The JT-60SA is to be built jointly by Europe andJapan. Existing JT-60 facilities will also be utilized.
In Europe, the procurement is being carried out by theEuropean voluntary contributors who participate in theBA activities; CEA in France (cryogenic system, TF

Fig.6 Disassembling of the JT-60 has almost been
completed, and installation will start soon.