| 摘要 |
FIELD: production of radio-nuclides; nuclear engineering. ^ SUBSTANCE: proposed device for production of molybdenum-99 consists of nuclear aqueous solution reactor 1 containing compensation chamber 2 above active zone 3 connected in succession with sorption column 4. Apparatus 5 for holding fuel solution is mounted between reactor 1 and sorption column 4 in fuel solution circulating loop; apparatus 5 consists of two vessels 6 and 7 communicating from below. First communicating vessel 6 is provided with pressure branch pipe 8 and overflow branch pipe 9 which are connected respectively with pressure pipe line 10 and overflow pipe line 11 connecting apparatus 5 with reactor 1. Second communicating vessel 7 is provided with drain branch pipe 12 located below overflow branch pipe 9 of first communicating vessel 6. It is connected with drain pipe line 13 used for connection of apparatus 5 with sorption column 4. Compensating chambers 14 and 15 of first and second communicating vessels 6 and 7 located above overflow branch pipe 9 are interconnected together and are connected with compensating chamber 2. Fuel solution is pumped through active zone 3 of reactor 1 operating in stationary mode with compensating chamber 2 filled with gaseous medium and through sorption column 4, simultaneously sorbing molybdenum-99 from it. During pumping, fuel solution is held in fuel solution holding apparatus 5 for 6-24 after which it is pumped through heat exchange apparatus 22 to optimal temperature of sorption process. Upon completion of sorption process, radio-nuclides and chemical admixtures are washed off the sorbent, molybdenum-99 is desorbed and cleaned from radio-nuclides and chemical admixtures. ^ EFFECT: improved labor conditions; low cost of radiation protection of protective chamber; enhanced purity of fuel solution and molybdenum-99; low cost of cleaning molybdenum-99 from admixtures. ^ 15 cl, 1 dwg |
