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On January 26, 2007 at 0915 hours, the Clinton Power Station Plant Process Computer failed causing a loss of the Safety Parameter Display System. At 1715 hours, troubleshooting is ongoing and the failure has not been corrected and SPDS has not been restored. Since SPDS was not restored within eight hours, this event is reportable due to a major loss of emergency assessment capability per 10CFR50.72(b)(3)(xiii). The NRC Resident Inspector has been notified.

• * * UPDATE PROVIDED BY JERAMY ANDERSON TO JEFF ROTTON AT 0704 EST ON 01/27/07 * * *

Plant process computer was restarted at 0405 CST and a 2 hour confidence run has been completed. The Safety Parameter Display System is now operable. The licensee will notify the NRC Resident Inspector. Notified R3DO (Passehl)