05000335/FIN-2006010-01
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Finding | |
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| Title | Cable Spreading Room Automatic Halon Suppression System Out of Service |
| Description | The team identified an unresolved item related to the licensees failure to comply with the approved Unit 1 FPP for the out of service Halon 1301 fire suppression system in the Unit 1 CSR (FA B/FZ 57). Specifically, the system has been out of service since inadvertently discharging in December, 2005. The team did not find evidence in the licensees corrective action program to demonstrate the planned return of this system to operable status in a timely manner. The Unit 1 CSR is equipped with an automatic Halon 1301 fire suppression system that could be released both automatically and manually. During a maintenance activity in December, 2005, there was an accidental manual actuation and discharge of the Halon system. The licensee initiated CR 2005-33539 to document this incident, but the CR only addressed the accidental discharge of the system. The CR did not address the return of the Halon system to its intended design function nor did the CR evaluate the safety significance (from a fire protection standpoint) of the lack of an automatic fire suppression system in the room. During 2006, activities were undertaken to attempt to obtain the necessary parts and components needed to replace and/or restore the Halon system to an operable status. There was also an effort to evaluate alternative automatic suppression systems for the Unit 1 CSR in lieu of the existing Halon system due to Halons general decreased use for environmental considerations. Although these efforts were presented to the team by the licensee, there was no mechanism in place to formally track a systematic resolution of this issue. Additionally, there had been no engineering evaluation performed to determine the safety significance of the Halon fire suppression system being out of service for an extended period of time. Section 7.0 in Appendix 9.5A of the Unit 1 UFSAR addresses the FPP administrative controls. Section 7.5 addresses the inspection and testing requirements of the fire protection program and specifically lists the RAB Cable Spreading Room Halon System as a plant fire protection feature that is subject to periodic tests and inspections. Section 7.5 further stated that remedial actions be taken for equipment out of service, including fire suppression equipment, and remedial actions would include compensatory measures to ensure equivalent level of fire protection in addition to timely efforts to effect repairs and restore equipment to service. As part of its immediate compensatory measures, the licensee had posted a continuous fire watch in the Unit 1 CSR in accordance with provisions of its FPP. Communication that the Halon system was out of service was made to operations personnel and the station fire brigade through daily operations and shift turnover briefings. The Unit 1 CSR was also equipped with an automatic fire detection system. However, there was no evidence of actions or measures to evaluate the CSR to ensure an equivalent level of fire protection due to the automatic Halon suppression system being out of service for an extended period of time. Additionally, there was no evidence of timely efforts to effect repairs to this system and restore it to service, given the stated risk significance of a postulated Unit 1 CSR fire (PSL Individual Plant Examination of External Events). The fire fighting strategy procedure for the Unit 1 CSR had not been changed or annotated to reflect the Halon system being out of service. None of the plant hardware components associated with the Halon system were tagged or labeled to state that the system was out of service. During the inspection, the licensee generated CRs 2006-25892 and 2006-30034 to track the resolution of this issue in its corrective action program. Also, labels were applied to the Halon manual actuation release stations to inform plant personnel that actuation of those devices would not result in a release of Halon into the room. |
| Site: | Saint Lucie  |
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| Report | IR 05000335/2006010 Section 1R05 |
| Date counted | Dec 31, 2006 (2006Q4) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | N Staples J Quinones M Thomas F Mccreeshs Viasr Taylor G Kuzo J Quinones T Hoeg S Sanchez |
| INPO aspect | |
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Finding - Saint Lucie - IR 05000335/2006010 | |||||||||||||
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Finding List (Saint Lucie) @ 2006Q4
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