05000327/FIN-2011006-03
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Finding | |
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| Title | Sprinkler System in Room 690.0-A1 of the Auxiliary Building Has Nfpa Code Deviation |
| Description | The inspectors identified a non-cited violation of Operating License Conditions 2.C.(16) and 2.C.(13), for Units 1 and 2 respectively, for failure to install the automatic suppression system (sprinkler system) in the auxiliary building corridor 690 foot elevation, in accordance with applicable National Fire Protection Association (NFPA) Standard No. 13, Automatic Sprinkler Systems. Specifically, NFPA 13- 1975 required sprinklers to be installed within 12-inches of the ceiling. Portions of the auxiliary building sprinkler system were installed greater than 12-inches below the ceiling. As a result, the actuation of the fusible link type sprinklers would have been slower than originally intended after fire ignition. The licensee entered this issue into the corrective action program as Problem Evaluation Report 147467 and implemented compensatory measures (fire watches) in accordance with the approved fire protection program. This finding was determined to be a performance deficiency because the licensee did not locate the sprinkler heads according to the applicable Code of Record for the facility. The finding was more than minor because it was associated with the reactor safety mitigating systems cornerstone attribute of protection against external factors (i.e. fire). It affected the objective of ensuring the reliability and capability of systems that respond to initiating events. The inspectors evaluated this issue in accordance with Inspection Manual Chapter (IMC) 0609, Appendix F, Fire Protection Significance Determination Process, and determined that this finding was of very low safety significance (Green). Pursuant to IMC 0609, Appendix F, the finding category was fixed fire protection systems. The finding was of very low safety significance because of the limited number of sprinkler heads improperly installed, the proximity of the existing sprinklers to combustibles of concern, and the suppression system was nominally code compliant for all other aspects of design and installation. The inspectors determined that there was no cross-cutting aspect associated with this finding because the condition has existed since initial plant licensing and was not reflective of present performance |
| Site: | Sequoyah  |
|---|---|
| Report | IR 05000327/2011006 Section 4OA5 |
| Date counted | Mar 31, 2011 (2011Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | N Merriweather M Thomas R Fanner R Nease L Suggs J Dymek |
| INPO aspect | |
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Finding - Sequoyah - IR 05000327/2011006 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Sequoyah) @ 2011Q1
Self-Identified List (Sequoyah)
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