05000296/FIN-2018003-01
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Finding | |
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| Title | Main Steam Relief Valves Lift Settings Outside of Technical Specifications Required Setpoints |
| Description | A self-revealed SL IV NCV of Technical Specification (TS) 3.4.3, Safety Relief Valves, was identified when the licensee discovered, through as found test results, that three of the thirteen main steam relief valves (MSRVs) that were removed during the Spring 2018 Unit 3 outage had as found lift settings outside of the +/- 3 percent band required for their operability. The LER was associated with three of the thirteen MSRVs as found setpoints being outside of the +/- 3 percent setpoint band required for their operability. This was discovered on May 17, 2018, following as-found testing results conducted on all thirteen MSRVs that were removed during the refueling outage. The licensee determined that the three MSRV pilot discs had corrosion bonding to their valve seats as a result of their platinum anti-corrosion coatings flaking off. The licensee determined that these three MSRVs were inoperable for an indeterminate period of time from March 26, 2016, when the unit entered Mode 2 (beginning of operating cycle) to February 17, 2018, when the unit entered Mode 4 (beginning of refueling outage). The inspectors reviewed the licensee event report and determined that the report adequately documented the summary of the event including the cause and potential safety consequences. The inspectors also reviewed other documents that indicate that this type of failure is a known industry issue associated with this type of valve. |
| Site: | Browns Ferry  |
|---|---|
| Report | IR 05000296/2018003 Section 4OA3 |
| Date counted | Sep 30, 2018 (2018Q3) |
| Type: | TEV: Severity level IV |
| cornerstone | No Cornerstone |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | T Stephen M Kirk N Hobbs D Lanyi J Viera A Masters |
| Violation of: | Technical Specification |
| INPO aspect | |
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Finding - Browns Ferry - IR 05000296/2018003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Browns Ferry) @ 2018Q3
Self-Identified List (Browns Ferry)
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