Material for new-generation atomic reactors developed

phys.org | 3/19/2019 | Staff
bethtetleybethtetley (Posted by) Level 4
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Materials scientists from the National University of Science and Technology "MISIS" (NUST MISIS) developed a unique sandwich steel-vanadium-steel material that is able to withstand temperatures of up to 700°C, hard radiation exposure, mechanical stress and chemical exposure for a long period of time. The material can be used in the shells of nuclear reactor cores.

The rods belong to the key functional units of the nuclear reactor. They come into contact with uranium fuel and control the intensity of the nuclear reaction. The main problem of the new generation fast neutron nuclear reactor, which allows reusing uranium, is the serious loads to which these rods are subjected.

Operating - Temperatures - Fuel - Element - Shells

The maximum operating temperatures of the fuel element shells in the new generation reactors reach 550-700°C. Sodium, the liquid metal coolant, operates outside. The loads created are much higher than those that the core shells of existing reactors can withstand.

To close the nuclear fuel cycle in a new generation fast neutron reactor, new structural materials that can provide a higher fuel burn-out compared to what is currently achieved, are needed. These materials should withstand damaging radiation doses of up to 180-200 dpa (displacements per atom), instead of the maximum 100-130 dpa, that are typical for existing materials.

Conditions - Shell - Rods - Steel - Aim

In such conditions, shell rods made of steel are simply not able to work. The aim of materials scientists to create material...
(Excerpt) Read more at: phys.org
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