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First Wall Materials

#0486


Investigation of Structure and Mechanical Properties of Perspective Structural Materials for the First Wall of the Thermonuclear Reactor after the exposure of Ion Beams, Plasma Radiation of Laser Range and Dynamic Loads Modeling the Plasma Attack...

Tech Area / Field

  • PHY-STM/Structural Mechanics/Physics

Status
3 Approved without Funding

Registration date
17.11.1995

Leading Institute
All-Russian Scientific Research Institute of Non-Organic Materials named after A. Bochvar, Russia, Moscow

Supporting institutes

  • A.N.Frumkin Institute of Physical Chemistry and Electrochemistry, Russia, Moscow\nRussian Academy of Sciences / Physical Technical Institute, Russia, St Petersburg\nVNIIEF, Russia, N. Novgorod reg., Sarov\nJoint Institute of Nuclear Research, Russia, Moscow reg., Dubna\nResearch Industrial Enterprise Dimet Ltd., Russia, Moscow

Project summary

Objective:

• developing an alternative multilayer composite (Steel -MAGT type alloy - beryllium);

• studying structural and mechanical variations under simulated plasma impacts to assess the feasibility of the composite as a plasma-facing material. 5.2 Scope of activities:

Within the scope of this Project plans are to study the following;

• parent structure and properties of candidate materials (stainless steels, copper alloys, different types of beryllium and its joints);

• helium embrittlement, radiation swelling and evolution of radiation defects in candidate materials and their joints exposed to heavy ions, a-particles and protons;

• dynamic stability and mechanical properties of the He-implanted materials in the whole load rate range -up to the rate expected during plasma disrupture;

• powerful pulse laser simulated processes in the irradiated candidate materials during plasma disrupture;

• behaviour of hydrogen isotopes and helium in subsurface areas of beryllium in the steady-state and plasma disrupture conditions.

• radiation, heat and dynamically - resistance of multilayer composite.

It is planned that irradiation (damage dose in dpa, helium concentration, laser pulse power, temperature etc.) and test (load rate and temperature) parameters would correspond to those expected in ITER.

Expected results:

It is planned to obtain the new database describing the combined im-pact of heavy ions, helium and hydrogen isotope ions, plasma and dynamic loads on the structure and mechanical properties of candidate structural materials and to evaluate their resistance to irradiation and gaseous swelling, irradiation embhttlement and dynamic loads and their possible application as a F W material.

The project has the advantage of:

• being realised by joint efforts of product engineers toward developing multilayer composites and of researchers experienced in comprehensive investigation of radiation, thermal and dynamic strength;

• combined modeling of plasma impacts on the F W using different accelerators of 1 keV -10 MeV heavy and light ions, a powerful pulse laser and a dynamic testing unit - providing for a substantial saving in materials and time;

• using modern techniques (X-ray, electron microscopy, mass-spectrometry, dynamic mechanical tests etc.).


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