IRRADIATED TARGET FOR PRODUCING RADIOISOTOPES, METHOD OF PREPARING AND USING IRRADIATED TARGET Russian patent published in 2019 - IPC G21C1/02 

FIELD: physics.

SUBSTANCE: invention relates to a sintered target of rare-earth metal oxide for producing a radioisotope in a pipe for instrumentation of a power nuclear reactor. Sintered target has density of at least 90 % of theoretical density, and sintered target contains chromium in volume from 500 to 2,000 mcg/g and Mg and/or Ca in volume from 1,000 to 6,000 mcg/g. Sintered target is prepared by providing oxide powder of rare-earth metals, mixing powder of rare-earth metal oxide with chromium oxide, dry crushing and consolidation of powder in mold for formation of spherical semi-finished product and sintering of semi-finished product into solid phase for formation of spherical target from ytterbium oxide.

EFFECT: technical result is small size of target, adapted to use of ball measuring systems, as well as resistance of the target to pressure, heat resistance and shear resistance so that sufficient strength is provided when introducing into the ball measuring system and during transportation through the reactor core by means of compressed air; furthermore, providing a smooth surface of the target for preventing rubbing of tubes for instrumentation and chemical purity of the irradiated targets, which ensures their suitability for producing radioisotopes.

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