Is it reasonable to use the coherent elastic scattering cross section for the powdered polycrystal in the simulation of reactors?

28 June 2021 1 9K Report

In File 7 of ENDF thermal scattering sublibrary, the coherent elastic cross sections of solid polycrystals are all for powdered samples.

Texture in the solid samples will affect the Bragg scattering cross sections. The structural materials in reactors are not powdered samples. I wonder is it reasonable to use the coherent elastic scattering cross section for the powdered polycrystal in the simulation of reactors?

Nicolò Grilli

What do you mean by reactor?

Coherent elastic scattering of what?

Neutrons and X-Rays undergo Bragg scattering in polycrystalline metals.

As you mention the behaviour is similar to a powder, because of low interaction of the radiation with the material.

Nicolò

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