METHOD FOR OBTAINING MOLYBDENUM-99 RADIOISOTOPE Russian patent published in 2013 - IPC G21G1/08 

FIELD: power industry.

SUBSTANCE: as a target, proposed method uses structured material consisting of molybdenum nanoparticles or its compounds enveloped with a buffer in the form of a solid substance soluble in water or other solvents; at that, d - typical size of nanoparticles is chosen from condition λ/d>>1, where λ - distance of travel in the substance of a nanoparticle of recoil atoms ⁹⁹Mo. As a result of ⁹⁹Mo(n,γ)⁹⁹Mo reaction, recoil atoms are formed, some part of which leaves nanoparticles due to its kinetic energy and is implanted into the buffer enveloping the buffer. After exposure to radiation the target is removed from the reactor, nanoparticles and the buffer is separated with one of known methods. The buffer is supplied for radiochemical processing for separation of a target radioisotope, and molybdenum nanoparticles are returned to the reactor active zone as a part of a new target.

EFFECT: reduction of quantities of radioactive wastes and improvement of use efficiency of fissile material.

6 cl, 1 dwg