Effect of fuel nuclide composition on the fuel lifetime of reactor KLT-40S

Beliavskii, S.; Нестеров, В. Н.; Laas, Roman; Godovikh, Alexei V.; Bulakh, Olga Igorevna

doi:10.1016/j.nucengdes.2020.110524

Cited by 12 publications

(1 citation statement)

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“…The range of adjustment should also refer to the actual needs of some projects. For example, in order to satisfy the requirement of non-proliferation, the content of U-235 should preferably not exceed 20% when conducting theoretical research [33][34][35]. Keeping the initial excess reactivity and power density similar, and under specific energy spectrum conditions, the variation in keff with time for four kinds of fuels (UO 2 , PuO 2 -UO 2 , PuO 2 -ThO 2 , and UO 2 -ThO 2 ) was analyzed during the full-power operation of the core for 20 years.…”

Section: Selection Of Breeding Fuels and Driving Fuelsmentioning

confidence: 99%

Study on Fuel Selection for a Long-Life Small Lead-Based Reactor

et al. 2022

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The choice of an appropriate fuel can effectively prolong the refueling cycle of a reactor core. The Th-U cycle and U-Pu cycle are commonly used fuel breeding cycles. Oxide fuels, nitride fuels, and metal fuels are the primary candidate fuels for lead-based reactors. For fuel selection, a core model of a 60 MWt reactor was established. The results show that the breeding performance of the breeding fuel Th-232 is better than that of U-238, and the driving performance of the driving fuel Pu-239 is better than that of U-235. Therefore, PuO2-ThO2, PuN-ThN, and Pu-Th-Zr fuels may have good performance. By comparing the reactivity loss of three types of fuel, it was found that the reactivity loss of PuN-ThN fuel is the smallest. Hence, using PuN-ThN fuel as a core fuel can result in a longer refueling cycle. On this basis, PuN-ThN fuel was used in the preliminary design of the 120 MWt core physical model. It can be seen that when PuN-ThN fuel is used as the core fuel, a smaller reactivity swing (1408 pcm), smaller power peak factor, and super long refueling cycle (more than 30 years) can be obtained.

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Section: Selection Of Breeding Fuels and Driving Fuelsmentioning

confidence: 99%