Spallation target for Ci ADS Xueying Zhang Institute

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Spallation target for Ci. ADS Xueying Zhang Institute of Modern Physics (IMP), CAS

Spallation target for Ci. ADS Xueying Zhang Institute of Modern Physics (IMP), CAS

OUTLINE 1. 2. 3. 4. Research Aims Granular target LBE target with window Collaboration

OUTLINE 1. 2. 3. 4. Research Aims Granular target LBE target with window Collaboration Target for Ci. ADS 2

The preliminary Design of Ci. ADS China initiative Accelerator Driven System • • •

The preliminary Design of Ci. ADS China initiative Accelerator Driven System • • • The overall design of Ci. ADS facility has been worked out LINAC: 500 Me. V@5 m. A with CW mode Spallation Target: spallation target, 2. 5 MW Sub-critical core: 10 MWt, LBE cooled Target for Ci. ADS 3

Target: Research strategy p p p Designing platform construction Conceptual design Comparing with the

Target: Research strategy p p p Designing platform construction Conceptual design Comparing with the existing data and bench test experiments Code V & V Optimizing the codes Optimizing the design Constructing a prototype Preliminary design …… • Starting with LBE target design, coming to a new type of granular target • LBE target with window as the backup of the granular target Target for Ci. ADS 4

OUTLINE 1. 2. 3. 4. Research Aims Granular target LBE target with window Collaboration

OUTLINE 1. 2. 3. 4. Research Aims Granular target LBE target with window Collaboration Target for Ci. ADS 5

Granular Target Concept • In principle, it can stands for tens of MW beam

Granular Target Concept • In principle, it can stands for tens of MW beam power • Increasing flexibility to use other target materials to increase the neutron yields Target for Ci. ADS 6

Granular Target Design physics design Sidewall leakage neutron spectrum energy deposition Secondary radioactive decay

Granular Target Design physics design Sidewall leakage neutron spectrum energy deposition Secondary radioactive decay Neutron flux distribution Packing factor Temperature distribution Radiation damage of pipe (2. 5 MW=250 Me. V@10 m. A) velocity distribution Target for Ci. ADS 7

Granular Target Design Main Parameters Granular material Tungsten/Tung sten alloy Structure material Tungsten alloy/Si.

Granular Target Design Main Parameters Granular material Tungsten/Tung sten alloy Structure material Tungsten alloy/Si. C Granular size ~1 mm Inlet temperature ~250 C MAX Outlet ~650 C temperature Proton beam 500 e. V@5 m. A= 2. 5 MW Intensity of beam >100 μA/cm^2 Diameter of beam spot ~10 cm Average velocity of granular flow ~0. 5 m/s Target for Ci. ADS 8

Granular Target Design Granular flow loop Beam-Target interface beam diagnostics Storage vessel Electromagnetic lift

Granular Target Design Granular flow loop Beam-Target interface beam diagnostics Storage vessel Electromagnetic lift Spalla tion target Heat Exchanger Granular flow loop Target safety system Remote handling system EM lift Grain filter Guanular flow monitor Target Neutron monitor Heat exchanger Emergency container Target for Ci. ADS 9

Test Bench – Granular Flow Temperatures field of outlet The difference between inlet and

Test Bench – Granular Flow Temperatures field of outlet The difference between inlet and outlet Heat exchanger test Coupled with electron beam (2 Me. V@10 m. A, cover gas: He@1 atm) Target for Ci. ADS 10

Test Bench – Granular Flow Integrated principle prototype The temperature of grain The temperature

Test Bench – Granular Flow Integrated principle prototype The temperature of grain The temperature of cooling water Target for Ci. ADS 11

OUTLINE 1. 2. 3. 4. Research Aims Granular target LBE target with window Collaboration

OUTLINE 1. 2. 3. 4. Research Aims Granular target LBE target with window Collaboration Target for Ci. ADS 12

LBE Target with Windows Main Parameters shielding Diameter of Beam 10 cm Heat exchanger

LBE Target with Windows Main Parameters shielding Diameter of Beam 10 cm Heat exchanger Beam Energy 500 Me. V Beam Current 0. 5 m. A LBE average flow ~30 kg/s LBE max velocity 0. 63 m/s Window Thickness 2 mm (T 91) Temp. Difference of Heat Exchanger 50 K Max velocity of cold fluid 1. 52 m/s Wall Thickness of Heat Exchanger 1. 75 mm EM pump Beam pipe and window Nozzle LBE vessel Support structure; Target for Ci. ADS 13

LBE Target with Windows Design IMPORTANT REMARKS: • Temperature, hydrodynamics and structure coupled analysis

LBE Target with Windows Design IMPORTANT REMARKS: • Temperature, hydrodynamics and structure coupled analysis employed • Highest beam power limited by window Target for Ci. ADS 14

Test Bench - LBE p A water loop for window/windowless LBE target has been

Test Bench - LBE p A water loop for window/windowless LBE target has been established, and is used to investigate flow behavior. 8. 4 – 20 m 3/h flow range p A liquid metal test stand, Li. Me. TS has been shifted to IMP from PSI p A LBE test loop, STELA is built to study thermalhydraulics, circulation methods, measurement techniques, etc. p Constructing a prototype Li. Me. TS from PSI STELA Water flow experimental loop of window target Spallation target experimental loop for the ADS Target for Ci. ADS 15

OUTLINE 1. 2. 3. 4. Research Aims Granular target LBE target with window Collaboration

OUTLINE 1. 2. 3. 4. Research Aims Granular target LBE target with window Collaboration Target for Ci. ADS 16

Collaboration 1 • • • Remote Handling Systems design and engineering Active Cells Facility

Collaboration 1 • • • Remote Handling Systems design and engineering Active Cells Facility Process Cell and Maintenance Cell Shipment casks Changing target technology Technical Galleries 2 Accelerator-Target Interface design and technique • Beam window • Beam scan unit • Target protecting and beam diagnostics in front target 3 Helium system
 • filter unit • radiation purification unit …… Target for Ci. ADS 17

& Welcome to Collaboration ! Target for Ci. ADS 18

& Welcome to Collaboration ! Target for Ci. ADS 18