ENS 52319

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v t e ENS Event
18:39 Oct 26, 2016
Title	Tornado Missile Vulnerabilities
Event Description	During the evaluation of tornado missile vulnerabilities and the potential impacts to Technical Specification (TS) plant equipment, it was concluded that the following SSCs [Structures, Systems, and Components] were vulnerable to tornado generated missiles: The Turbine Driving Auxiliary Feedwater (TDAFW) pump exhaust vent is not adequately protected from tornado generated missiles. A tornado could generate missiles capable of striking the exhaust piping on the Turbine Driven Auxiliary Feedwater Pump, crimping the piping resulting in reduced flow capacity and rendering the TDAFW pump inoperable. The Condensate Storage Tank (CST) vents are not adequately protected from tornado generated missiles. A tornado generated missile could strike the vent piping rendering it unable to relieve vacuum on the top of the CST and allow adequate water flow to the Auxiliary Feedwater Pumps and rendering the CST inoperable. These conditions are reportable per 10 CFR 50.72(b)(3)(ii)(B) for any event or condition that results in the nuclear power plant being in an unanalyzed condition that significantly degrades plant safety, and per 10 CFR 50.72(b)(3)(v)(D) for any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident. This condition is being addressed in accordance with EGM-15-002 and DSS-ISG-2016-01 (enforcement discretion and interim guidance documents). The NRC Resident lnspector has been notified.

ENS 52319 +/-
Where
Vogtle Georgia (NRC Region 2)
Reporting

10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Time - Person (Reporting Time:+-2.07 h-0.0863 days <br />-0.0123 weeks <br />-0.00284 months <br />)
Opened:	R.T. Nix 16:35 Oct 26, 2016
NRC Officer:	Steven Vitto
Last Updated:	Oct 26, 2016
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v • d • e

v t e Emergency Notification System
Vogtle with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
WEEKMONTHYEAR2022-10-23T08:05:00 [Table view]
[ENS list for Vogtle]

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