DEVELOPMENT AND THERMOPHYSICAL ANALYSIS OF AN IRRADIATION CAPSULE MODEL FOR Mo-99 PRODUCTION IN THE WWR-K REACTOR

The paper presents the results of a thermophysical analysis of an irradiation capsule design intended to increase the specific activity of ⁹⁹Mo in the WWR-K research reactor. Numerical simulations were performed using the ANSYS Fluent 2021 R2 software package for three configurations of the reactor core, including the standard irradiation capsule. It is demonstrated that the developed irradiation device ensures a reliable thermal regime, with the maximum temperature of molybdenum trioxide powder reaching 152.6 ℃ and the coolant temperature not exceeding 50.1 ℃. The results confirm the safe operation of the irradiation device within various core configurations of the WWR-K reactor.

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