1. Study of the Self-Controllability for the Fast Reactor Core with High-Thermal-Conductivity Fuel
- Author
-
Hiroshi Endo, Tsugio Yokoyama, Moriyasu Tokiwai, Hisashi Ninokata, and Tomoko Ishizu
- Subjects
Nuclear and High Energy Physics ,Steady state ,Chemistry ,Nuclear engineering ,Zirconium alloy ,Nuclear reactor ,Coolant ,law.invention ,Core (optical fiber) ,Thermal conductivity ,Nuclear Energy and Engineering ,Nuclear reactor core ,law ,Boiling ,Nuclear chemistry - Abstract
The tolerance capability against ATWS for the FBR core with metallic fuel can be improved by employing a fuel with high thermal conductivity (HTC fuel) instead of the conventional metallic fuel, UPu-Zr. To investigate the self-controllability for the HTC-fueled core with U-Pu-Al alloy fuel, having one order of magnitude higher thermal conductivity than that of the U-Pu-Zr, the core employing the U-Pu-Al fuel was evaluated against ULOF and UTOP. Based on the systematic calculation, it was found that the larger temperature margin between the steady state and ULOF/UTOP conditions caused the excellent tolerance capability against ULOF and UTOP for the HTC-fueled core compared with that for the Zralloy-fueled core. Also, the conditions of the core reactivity coefficients required for neither fuel melting nor coolant boiling were investigated by using a “self-controllability map” consisting of effective fuel and coolant reactivities. As a result, the self-controllable region was found to be expanded especially ...
- Published
- 2010