WR derivative power plants

Three of the water cooled reactor concepts, PSRD (4), MASLWR (5) and Package-Reactor (6), are downsized light water reactors (LWRs) using traditional uranium dioxide fuel and operating on natural circulation, see Table 4a. 

The MASLWR reactor at 35 MW(e) is a natural circulation PWR derivative with integral steam generators and cogeneration capability, see Fig. 3. Each 35 MW(e) plant is modularized for delivery in three shippable components reactor, balance of plant, and condenser. It is intended that multiple MASLWR power plant modules of 35 MW(e) each will be clustered to form a multi-module power plant of up to 1050 MW(e) total output. For refuelling, the reactor components themselves are taken out and returned to the factory on a 5-year interval. 

All of these LWR-derivative concepts rely on traditional uranium dioxide fuel clad in Zr alloy. However, heat transport and refuelling are non-traditional. The designs are either at a feasibility study or conceptual design stage. Several years of further R D will be required prior to licensing and commercialization of these concepts, but they have a potential to be available for deployment sooner than the other longer-term concepts. 

Nuclear power generation unit (a) and configuration of multi-cassettes/single steam generator (b) in the Package-Reactor, see ANNEX VIII for details. 

---