While everyone is paying attention to the Nord Stream industrial sabotage to damage Russia-Europe energy relations further, this month Russia has been successfully running a reactor on an innovative fuel, a uranium-plutonium mixed oxide, at Beloyarsk NPP, for the first time. This also almost entirely resolves the problem of spent fuel rods. This is truly revolutionary. Unit 4 of the Beloyarsk nuclear power plant, Russia’s BN-800 reactor, has been connected to the grid and resumed operations upon completion of scheduled maintenance. For the first time the refuelling has been carried out with uranium-plutonium fuel only.
World Nuclear News – Distinct from traditional nuclear fuel with enriched uranium, mixed oxide (MOX) fuel pellets are based on the mix of nuclear fuel cycle derivatives, such as oxide of plutonium bred in commercial reactors, and oxide of depleted uranium which comes from defluorination of depleted uranium hexafluoride (UF6), the so-called secondary tailings of uranium enrichment facilities.
The first batch of 18 MOX fuel assemblies was loaded into the BN-800 reactor core in January 2020, and now 160 assemblies more with fresh MOX fuel have been added. These replace the fuel assemblies with enriched uranium. Thus, the BN-800 core is now one-third filled with MOX fuel. From now on, only MOX fuel will be loaded into this reactor.
The development moves the Beloyarsk plant a step closer to Rosatom’s strategic goal to close the nuclear fuel cycle, Ivan Sidorov, director of Beloyarsk NPP, said.
“This means that using MOX fuel will make it possible to involve the uranium that is not currently used in the fuel manufacturing and expand the resource feed-stock of the nuclear power industry. In addition, the BN-800 reactor can re-use spent nuclear fuel from other nuclear power plants and minimise radioactive waste by ‘afterburning’ long-lived isotopes from them. Taking into account the schedule, we will be able to switch to the core fully loaded with MOX fuel as early as 2022,” he said.
The fuel assemblies were manufactured at the Mining and Chemical Combine (MCC), in Zheleznogorsk, in the Krasnoyarsk region of Russia.
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