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| Entered date | Event description | |
|---|---|---|
| ENS 43487 | 12 July 2007 18:35:00 | During a review of abnormal operating procedure (AOP) 10A, Safe Shutdown-Local Control, by the NRC triennial fire inspection team, it was identified that fire damage to the reactor coolant system (RCS) power-operated relief valve (PORV) and block valve circuits as a result of a fire in the cable spreading room could also result in simultaneous damage to a block valve circuit and spurious actuation of a PORV. While the actions included in abnormal operating procedure (AOP)-10A provide reasonable assurance that positive control of RCS Inventory is maintained, these steps do not ensure that simultaneous failure of the block valve circuit and spurious operation of a PORV will not result in RCS depressurization. Therefore, a postulated fire may potentially remove the ability to fully implement the Safe Shutdown Strategy. Compensatory measures in the form of twice-per-shift fire rounds in the cable spreading room have been implemented. The licensee notified the NRC Resident Inspector. |
| ENS 42611 | 31 May 2006 14:15:00 | Control Room Emergency Filtration System (CREFS) was declared Inoperable at 0923 on 5/30/2006 per TS 5.5.10.c 'Ventilation Filter Testing Program'. Laboratory testing results of a sample of the charcoal adsorber taken on 5/2/2006 did not meet the methyl iodide penetration percentage acceptance criteria of less than or equal to 1.0%. This condition is covered by TS 3.7.9 and both Unit 1 and Unit 2 entered Condition A, 'CREFS Inoperable' with a Required Action of 'Restore CREFS to OPERABLE status' with a Completion Time of 7 Days. CREFS is a single train system. Based on the guidance in NUREG-1022 for single train systems that perform safety functions, this condition was determined to be reportable under 10 CFR 50.72(b)(3)(v), 'Event or Condition That Could Have Prevented Fulfillment of a Safety Function'. Technical Specifications allow this system to be inoperable for a period of seven days. This condition was not reported within the 8 Hour Non-Emergency reporting requirements. The charcoal has been replaced and the licensee estimates testing at approximately 17:00. The licensee notified the NRC Resident Inspector. |
| ENS 41705 | 17 May 2005 17:08:00 | A non-licensed contract employee found a can of beer in his lunch box. The licensee's investigation determined that the introduction of alcohol into the Protected Area was not an intentional act. The contract employee's access was restored. The licensee notified the NRC Resident Inspector. Contact the Headquarters Operations Officer for additional details.
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