Core and transient design of a BWR for the next century

Basic parameters for the core and transient design of the BWR for the next century is investigated, and a reference core design is selected for fundamental studies on the core and transient characteristics. A previous paper in ICONE-3 showed that the reference core design has potential for the core design flexibility. This paper reports the basis of the reference core selection in conformity with utilities` requirements and the progress of studies on the core and transient design of the reference core. A new concept called functional control rod layout is selected as a candidate for the reference core.