* Aug. 20, 1999 -- BNFL discovers MOX data falsification related to fuel being produced for Takahama No. 3 reactor.

* Sept. 10 -- BNFL reports falsification to Nuclear Installations Inspectorate.

* Sept. 11 -- BNFL notifies Kepco's MOX contractor, Mitsubishi Heavy Industries Ltd., by fax about the falsification. Mitsubishi receives notice Sept. 13 Japan time and notifies Kepco.