FACILITIES FOR THE IRRADIATION OF 235-U FOR THE PRODUCTION OF 99-MO AT THE HFR PETTEN
One of the most applicated radioactive isotope in modern tumor diagnosis is technetium-99m, the daughter nuclide of molybdenum 99. 99-Mo can be obtained as a fission product of uranium-235. The 99-Mo in form of molybdate absorbed into an aluminium oxyde column, formed the generator, usually termed as radioactive "cow", where by "milking" 99m-Tc with its short half-life of 6 hours can be obtained. The basis product 235-U in form of plates or tubes, is similar to the plates used in MTR type assemblies. They are irradiated in special rigs for four to six days at a thermal neutron flux between 1x10**14 and 2x10**14 cm**-2s**-1, corresponding to a maximum specific heating rate of 130 W/cm**2. The paper describes the used facilities and in special, a new in-core facility for the irradiation of 9 targets simultaneously. The design of the capsule allows the loading and unloading of the targets, making use of a special floating chamber system during reactor operation, without interrupting the cooling circuit and the pressure of the reactor.
Bibliographic Reference: IRRADIATION TECHNOLOGY, GRENOBLE (FRANCE), SEPT. 28-30, 1983, PUBL. IN IRRADIATION TECHNOLOGY (1983), PP. 677-683
Record Number: 1989122005300 / Last updated on: 1987-01-01
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