ENS 53265

v t e ENS Event
19:24 Mar 15, 2018
Title	Failure to Meet Appendix R Requirements
Event Description	At 1524 [EDT] on Thursday, March 15, 2018, Operations was notified of a failure to meet Appendix R requirements for Peach Bottom Atomic Power Station (PBAPS) Unit 2 and Unit 3. Valves associated with the feedwater system for both units were not properly considered as Hi-Lo Pressure interface valves as required by the Appendix R program. This results in the susceptibility to a hot short condition that could open valves, diverting flow from the reactor, damage piping and prevent injection. U3 [Unit 3] Fire Safe Shutdown Credited Reactor Core Isolation Cooling (RCIC) System is affected. U2 [Unit 2] is affected by a potential leak path through the Reactor Water Cleanup system. This event is being reported as an occurrence of an event or condition that results in the nuclear power plant being in an unanalyzed condition that significantly degrades plant safety under 10 CFR 50.72(b)(3)(ii). The Station [PBAPS] is performing hourly fire watches for the impacted areas and is also evaluating this condition for corrective action. The licensee notified the NRC Resident Inspector.

ENS 53265 +/-
Where
Peach Bottom Pennsylvania (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Time - Person (Reporting Time:+2.73 h0.114 days <br />0.0162 weeks <br />0.00374 months <br />)
Opened:	Brian Bailey 22:08 Mar 15, 2018
NRC Officer:	Vince Klco
Last Updated:	Mar 15, 2018
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v • d • e

v t e Emergency Notification System
Peach Bottom with 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
WEEKMONTHYEAR2025-09-04T15:10:00 [Table view]
[ENS list for Peach Bottom]

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