INVESTIGATION METHOD OF RADIATION BEHAVIOUR OF NUCLEAR REACTOR MINUTE PARTICLES Russian patent published in 2009 - IPC G21C3/02 

FIELD: power engineering.

SUBSTANCE: invention refers to nuclear power engineering, and namely to investigation methods of minute particles of high-temperature gas cooled reactors. Investigation method of radiation behaviour of nuclear reactor minute particles consists in radiation of samples with high energy ions with subsequent isothermal annealing at temperature of 1500°C and more and analysis of samples prior to and after radiation. Samples made in the form of minute particle simulators with protective coverings and hemispheres prepared therefrom are pressed into matrix coal graphite composition thus forming a disc. Samples are located in the disc as a monolayer in a near-surface layer. Simulators of minute particles contact one of two flat disc surfaces. Hemispheres are led as equatorial sections to the same surface. Carbon microspheres containing stable isotopes of fission products and calcium phosphates are used as simulators of minute particles. Analysis of radiation damages is carried out by comparing structures of protective coverings on simulators of minute particles and protective coverings on hemispheres of simulators of minute particles.

EFFECT: invention allows improving informativity of investigation, determining accumulation mechanism of radiation defects in coverings and diffusion processes dealing therewith, determining physical and chemical transformations restricting corrosion resistance of the main power and diffusion barriers that are made from carbidic, nitrided and the like materials and included in the composition of minute particles.