Energy Physics EngineeringAdvanced Fusion Reactor EngineeringCourse of Quantum Science and Energy Engineering, Department of Mechanical and Aerospace Engineering

Prof. Hidetoshi Hashizume, Assoc. Prof. Noritaka Yusa, Assoc. Prof. Satoshi Ito, Assis. Prof. Jing Wang

Designing advanced fusion reactors !!

We are studying on novel technologies for designing advanced fusion reactors, from aview point of integrated energy engineering using fluid dynamics, heat transfer engineering,electromagnetics and structural mechanics.

Designing advanced fusion reactors !!

ダイバータ

Remountable high-temperature superconducting magnet

R&D in HTS conductors

Advantage：Easy fabrication, High maintainabilityImportant features for a commercial fusion reactor !

Huge and complex superconducting magnet for a fusion reactorRemountable high-temperature superconducting (HTS) magnet

Remountable Coil BobbinRemountable Coil Bobbin

R&D in porous channel for local heat removal Fabrication of a prototype magnet

R&D in mechanical joints

Design of mechanical and cooling structures

Schematic illustration of a remountable HTS magnet

CryostatVacuum vessel

Supportstructure

Divertor

Superconductingpoloidal coil

Core plasma

Superconductinghelical coil

Blanket

H li l f i t FFHR d1

Divertor cooling technique

Cooling technique using self-formed flow field R&D in divertor cooling technique using

self-formed flow field in elbow tube basedon flow field visualization and heat removal experiments

Prototype of a remountable HTS magnetHigh current HTS conductor(100 kA at 4.2 K for 1 hour)

4 Jointing Regions

5-Layered BSCCO 2223 Cable

Voltage Tap

Jointing Region

5-Layered BSCCO 2223 Cable

Voltage Tap

Jointing Region

Experiment for heat transfer enhancement of liquid nitrogen

100 kA

接合

高温超伝導テープ線材銅ジャケット

ステンレスジャケット

Mechanical bridge joint

Advanced liquid blanket Molten salt Flibe blanket: R&D in new molten salt to be suited for heat removal

d t iti b di

Advantage: Flibe or liquid lithium can play a role as a tritium breeder and coolantLiquid Lithium / Vanadium alloy channel blanket:

Reduction of MHD pressure drop by a three-surface-multi-layered channel

Ultra high heat flux at the divertor

Helical fusion reactor, FFHR-d1(National Institute for Fusion Science)

HTS tape Cu jacket

SS jacket

Joint

2.1

0.2

[m/s]

2nd in

2nd out

Swirling flow at outlet of a dual elbow tube

3D dual elbow tube3D dual elbow tube

for flow field visualization

Reynolds shear stress downstream of elbow tube

and tritium breeding Design of a blanket system having a function of

nuclear transmutation of a spent fuel

Evaluation of thermo-fluid characteristic for Li/V blanket

Circular MHD Flow Channel Magnet (Bmax=5.5T)

Fabrication of a prototype channel

UCLA

HFLSM, IMR, Tohoku University

First elbow

Secondelbow

Nondestructive testing/evaluation for component of a fusion reactor

Microwave can propagate rapidly in a pipeMicrowave is reflected at defect inside a pipe

We can scan defects rapidly with the microwave NDT technique!

マイクロ波（入射波）

マイクロ波発振部

欠陥部

マイクロ波（反射波）

of a dual elbow tube

Heat removal experiment using arc plasma with high heat flux

R&D in a crack radar (Microwave NDT) R&D in structural inspection techniques using various NDTs

Microwave NDT for a elbow pipe

- Radiation: X-ray CT, X-ray transmission method- Ultrasonic wave: Harmonic ultrasonic wave testing- Electromagnetics: DC/AC electric potential technique,

Eddy current testing, Magnetic detection

Evaluations of cooling and nuclear characteristics for a Flibe blanket having a function of nuclear transmutation

R&D in new molten salt based on MD MHD simulation

MHD flow experiment by using high field facilities

UCLA

Applying the techniqueApplying the technique

Incident Wave

Reflected wave

Defect

Oscillator

Research topics

Experimental data to predict locations of wall thinning

Electromagnetic simulation for microwave NDT(Axial component of electric field)NDT for a joint of a remountable HTS magnet using X-ray CT Microwave NDT for a long pipe

Hashizume/Yusa/Ito Laboratory's website: http://afre.qse.tohoku.ac.jp/

Design and development of a remountable high-temperature superconducting magnetDesign and development of advanced liquid blanketsDevelopment of a divertor cooling technique using self-formed flow fieldDevelopment of Nondestructive testings/evaluations for component of a fusion reactor