720 Naval Reactors History Database (subject=Naval Reactors;subject-join=exact;smode=simple;brand=default;f1-date=2002;f2-subject=Nuclear engineering);subject-join%3Dexact;smode%3Dsimple;brand%3Ddefault;f1-date%3D2002;f2-subject%3DNuclear%20engineering Results for your query: subject=Naval Reactors;subject-join=exact;smode=simple;brand=default;f1-date=2002;f2-subject=Nuclear engineering Tue, 01 Jan 2002 12:00:00 GMT Fuel summary report: Shippingport Light Water Breeder Reactor. This report provides an in-depth analysis of the Light-Water Breeder Reactor (LWBR) core installed in the Shippingport Atomic Power Station from 1977 to 1982. The core "was developed to prove the concept of a pressurized water breeder reactor" (iv). Its operation was successful, in that the "LWBR generated more than 29,000 effective full power hours (EFPH) of energy" (1-1). The core's design was based on a Thorium/U-233 fuel cycle. The U-233 isotope was used because of its high neutron regeneration factor ("the average number of neutrons produced in fission for each neutron absorbed in fissile fuel") relative to U-235 and Pu-239 (3-1). The LWBR design was similar to the two earlier PWR core its use of a seed-blanket design for the reactor fuel. However, one difference between the LWBR and the PWR cores that preceded it in the Shippingport plant was the control mechanism: instead of Hafnium control rods, the breeder plant "was designed with a movable seed, which was raised and lowered to control neutron ... Tue, 01 Jan 2002 12:00:00 GMT