Event Notification Report for December 28, 2002

SAFETY EQUIPMENT FAILURE

"At 1515 CST, on 12-28-02 the Plant Shift Superintendent (PSS) was notified that the power for C-746Q1 facility was being returned to the normal supply. The C-746Q1 CAAS system power was being supplied via a portable generator to maintain CAAS operability. As part of this evolution, the CAAS system power was to be transferred back to normal as well by repositioning a knife switch and disconnecting the portable generator. When the knife switch was repositioned, C-746Q1 CAAS Cluster AD Trouble alarm was received (expected alarm) but did not immediately clear (unexpected response). When the building was entered, the building area lights were illuminated, the UPS POWER ON light was extinguished and the HORN POWER ON light was illuminated. The CAAS UPS had the Battery Status light flashing and the Load Status light illuminated. At 1520, the UPS ON/Standby switch was manipulated in an attempt to reenergize the UPS since the assumption was that there was power to the UPS. This inappropriate action de-energized the UPS, extinguished the HORN POWER ON light and the CAAS horn power was lost. This caused a loss of CAAS Audibility for C-746Q1 end TSR LCO 2.6.4.1b was immediately entered. There were no fissile material operations in progress and all of the personnel in the affected area had a radio in constant communication with the Central Control Facility satisfying the required actions of TSR 2.6.4.1b. Upon further investigation it was determined that the knife switch had not been fully engaged in the normal power position and no power was available to the UPS as indicated by the extinguished UPS POWER ON light. At 1530 the knife switch was exercised and fully engaged in the normal power position. The UPS POWER ON light illuminated, the UPS was reenergized and CAAS Horn light illuminated reestablishing CAAS audibility and TSR 2.6.4.1b was exited.

"The events reportable as a 24 hour event, as required by 10 CFR76.120(c)(2)(i); An event in which equipment is disabled or fails to function as designed when the equipment is required by TSR to prevent releases, prevent exposures to radiation and radioactive materials exceeding specified limits, mitigate the consequences of an accident, or restore this facility to a pre-established safe condition after an accident. The equipment was required by TSR to be available and operable and no redundant equipment was available to perform the required safety function.

"The NRC Resident Inspector has been notified of this event."

LOSS OF COMMUNICATION WITH OFFSITE EMERGENCY RESPONSE FACILITY

Lost power to Emergency Operations Facility (EOF) at approximately 1228 CST on 12/28/02. The power outage is likely caused by a car/pole accident at Hwy 42 and Nuclear Rd. Repairs to the pole are expected to be complete by 1500 CST today (12/28/02). The Licensee has phone cell communications capability with the EOF if needed.

The NRC Resident Inspector has been notified.

*** UPDATE FROM DEAN RAASCH TO ARLON COSTA ON 12/28/02 AT 1649 EST ***

"Subsequent to the first notification it was discovered that the ENS phone lines from both the Control Room and TSC were also lost.

"Power was restored to the EOF at 1515 CST. ENS phones are also restored at this time."

The Licensee notified the NRC Resident Inspector.