Start of ABWR to move. Trial operation of Kashiwazaki-Kariwa Nuclear Power Station, No. 6 Reactor (from equipments installation to start of commercial operation)

Development of ABWR have been reflected many lessons based on advanced technology and passed experiences on operation of BWRs in the world and promoted under aims of 1) improvement of safety and reliability, 2) reduction of irradiation received by workers, 3) reduction of amounts of radioactive wastes, 4) improvement of operability, and 5) improvement of economics. As technical characteristics of the ABWR, it can be shown that recirculation pump of coolant is installed within the reactor as an internal pump, that channels in control rod driver is improved and that storing container made of steel reinforced concrete is adopted. For these new design technology and new design equipments, given performance, function and design validity were confirmed by using for preparing and constructing actually Kashiwazaki-Kariwa nuclear power station, Nos. 6 and 7 reactors, the first ABWR plants in the world and by executing various inspections and tests. In this paper, trial operation results containing the other starting operational test, discontent state during trial operation and so forth were introduced. (G.K.)