Rosatom is advancing its development of innovative nuclear fuels for the next-generation BN-1200 fast neutron reactor. The company is exploring two core fuel designs: oxide MOX (Mixed Oxide) fuel, used in the BN-800 reactor, and dense nitride MNUP (Mixed Nitride Uranium-Plutonium) fuel, designed for the Generation IV BREST-OD-300 reactor. This dual-fuel approach aims to maximize the BN-1200’s performance and efficiency, positioning it as the first serially produced fast neutron reactor worldwide.
Fuel Assembly Innovations and Testing Preparation
Rosatom has already fabricated experimental fuel assemblies to validate both fuel types. These include the OS-4 irradiation assembly, which uses MNUP fuel rods. This assembly is designed for higher burnup levels, exceeding standard reactor requirements. The OS-4 incorporates technical solutions to ensure safe operation in active reactors. Additionally, Rosatom developed three KETVS-MAK experimental assemblies, which feature BN-1200 fuel rods with an axial blanket. This design minimizes radiation damage to the cladding while maintaining the necessary burnup depth. The BN-1200 will be the first to implement this approach, although other countries have explored similar concepts.
Testing and Licensing Plans
Rosatom will begin testing the new fuel assemblies at the Beloyarsk NPP’s BN-600 reactor in 2025. These tests will help validate the fuel’s performance under maximum design conditions, paving the way for regulatory approval. Ensuring the fuel can withstand the harsh conditions of fast neutron reactors is crucial for confirming its suitability for long-term use in the BN-1200 reactor.
Strategic Role of the BN-1200 Reactor
The BN-1200 reactor is a vital component of Russia’s next-generation nuclear power technology. Building on the success of the BN-600 and BN-800 reactors, the BN-1200 will enhance Russia’s nuclear infrastructure by providing better sustainability and fuel efficiency. The reactor will have the flexibility to run on either MNUP or MOX fuel. While Rosatom has extensive experience with MOX fuel, MNUP fuel offers superior neutron-physical properties. Rosatom continues to evaluate both fuels to determine the optimal design for the BN-1200 core.
Timeline and Future Prospects
Rosatom plans to begin construction of the BN-1200 reactor at Beloyarsk NPP in 2027. Once completed, the BN-1200 will be the world’s first serially produced fast neutron reactor. Ongoing research into nuclear fuel and reactor designs will help ensure the success of the BN-1200 and future reactors. By testing new materials and configurations, Rosatom remains committed to pushing the boundaries of nuclear technology to support global energy sustainability.
Leave a Reply
You must be logged in to post a comment.