Pb—Bi-Cooled Direct Contact Boiling

A Pb-Bi cooled direct contact boiling water reactor ... 

XXV-8] TAKAHASHI, M., et al., Design and experimental study for development of Pb-Bi cooled direct contact boiling water small fast reactor (PBWFR), ICAPP 04 (Proc. Int. Congress, Pittsburgh, PA, USA, June 2004). 

The Pb—Bi-Cooled Direct Contact Boiling Water Fast Reactor (PBWFR) is a design concept of a small-size innovative direct contact (LBE—water) LFR being developed by Takahashi et al. (2008a,b) at the Tokyo Institute of Technology. In this concept. 

A more compact and economical lead-cooled fast reactor (LFR) than the conventional forced circulation type LFR has been proposed. A Pb-Bi-cooled direct contact boiling... 

The PBWFR concept [XXVII-1] is an evolution of the concept of a direct contact Pb-Bi fast breeder reactor (PBWR) proposed in [XXVII-2]. It is a pressure vessel type reactor, in which sub-cooled water is fed into the hot Pb-Bi coolant above the core, resulting in a direct contact boiling, as shown in Fig. XXVII-1. Boiling bubbles rise due to buoyancy effect, which also works as a lift pump for Pb-Bi circulation. The generated steam passes through the separator and the dryer to remove Pb-Bi droplets, and then flows to the turbine-generator plant. The outlet steam is superheated by 10°C to avoid the accumulation of condensate on a free Pb-Bi surface in the reactor vessel. 

---