Study on Transmutation of Minor Actinides as Burnable Poison in VVER-1000 Fuel Assembly

Nitride Fuel and Pyrochemical Process Developments for Transmutation of Minor Actinides in Jaeri

The Japan Atomic Energy Research Institute (JAERI) has proposed the concept of the transmutation of minor actinides (MA: Np, Am and Cm) with accelerator-driven systems (ADS), where MA nitride is adopted as a fuel material of a sub-critical core, because nitride fuel has the advantage of accommodating various MAs with a wide range of composition besides superior thermal and neutronic properties....

Cfd Study on Coolant Mixing in Vver-440 Fuel Rod Bundles and Fuel Assembly Heads

A CFD model of VVER-440 fuel assembly heads was developed based on the technical documentation of a full-scale test facility built in the Kurchatov Institute, Moscow. Steady-state and transient calculations were performed to validate the model with a measurement set and investigate the effects of the spatial discretization, choosing of different turbulence models and use of different inlet boun...

Minor Actinide Transmutation

Primary Loop Study of a VVER-1000 Reactor With special Focus on Coolant Mixing

In this paper a detailed model of a VVER1000 reactor pressure vessel (RPV) with the extension of simplified primary loops is presented (Loop model). The primary loop components like steam generators and pumps are modelled by the outer shapes and additional source terms for energy and momentum exchange. The RPV model part is tested without primary loops and compared with former results obtained ...

Evaluation of Alternative Partitioning/transmutation Scenarios Using Transmutation in Light-water Reactors (lwrs)

Previous Advanced Fuel Cycle Initiative (AFCI) studies were made to assess the effects of the existing accumulation of LWR spent fuel in the United States on the capability to partition/transmute actinides using existing and advanced LWRs. The concept of treating the “oldest fuel first” indicated that significant advantages could be gained in both partitioning, transmutation, and in overall cos...