Speaker
Description
The Russian Federation is developing a number of technologies within the «Proryv» project for closing the nuclear fuel cycle utilizing mixed (U-Pu-MA) nitride fuel. Key objectives of the project include improving fast reactor nuclear safety by minimizing reactivity changes during fuel operating period and improving radiological and environmental fuel cycle safety through Pu multi-recycling and MA transmutation.
This advanced technology is expected to allow operating the reactor in an equilibrium cycle with a breeding ratio equaling approximately 1 with stable reactivity and fuel isotopic composition. Nevertheless, to reach this state the reactor must still operate in an initial transient state for a lengthy period (over 10 years) of time, which requires implementing special measures concerning reactivity control.
The results obtained from calculations show the possibility of achieving a synergetic effect from combining two objectives. To sustain the required reactivity margin on burnup the initial fuel loading includes MA from thermal reactor spent fuel. This should be combined with using reactivity compensators in the first fuel micro-campaigns. The work also considers various options of the core including with axial layer.
The work presents the findings obtained from modeling the entire lifecycle of a 1200 MWe fast reactor, the transition to an equilibrium state and the changes occurring in spent nuclear fuel nuclide and isotopic composition. The work also demonstrates the possibility of completely utilizing MA from thermal and fast reactor spent fuel in next generation FRs without the need of special actinide burners.
| Affiliation/Organization | JSC "Proryv" |
|---|---|
| Country/Int. organization | Russian Federation |
| Speaker's email address | rea@proryv2020.ru |
| Speaker's title | Ms |
