05000324/FIN-2016003-06
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Finding | |
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| Title | Tornado Missile Vulnerability Results in Condition Prohibited by Technical Specifications |
| Description | On July 21, 2016, Units 1 and 2 were in Mode 1 at 100 percent of RTP. At that time, the licensee determined that a conduit in the EDG building was vulnerable to a tornado missile. The tornado missile vulnerability has existed since original plant construction. The conduit contains cables associated with Unit 2 NSW pump B. If the cables were disabled by a tornado missile, 2B NSW pump would be inoperable. TS 3.7.2, Service Water System and Ultimate Heat Sink, requires three of the four NSW pumps to be operable. The licensee determined that during other NSW pump outages, TS 3.7.2 AOT was exceeded. Inspectors verified the immediate compensatory measures were taken and intermediate compensatory measures were taken including updating station abnormal procedures to start the NSW pumps via the alternate safe shutdown switches and providing training to address the vulnerability during tornadoes. Enforcement Guidance Memorandum 15-002, Enforcement Discretion for Tornado-Generated Missile Protection Noncompliance, was implemented, and the licensee declared the 2B NSW pump operable but nonconforming. The licensee entered this issue into the CAP as NCR 2028383. The inspectors reviewed the cause evaluation and the LER. Documents reviewed are listed in the Attachment. |
| Site: | Brunswick  |
|---|---|
| Report | IR 05000324/2016003 Section 4OA3 |
| Date counted | Sep 30, 2016 (2016Q3) |
| Type: | Violation: Severity level Enforcement Discretion |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | J Dodson M Catts M Schwieg S Rose |
| Violation of: | Technical Specification |
| INPO aspect | |
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Finding - Brunswick - IR 05000324/2016003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Brunswick) @ 2016Q3
Self-Identified List (Brunswick)
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