ENS 52179: Difference between revisions

From kanterella

Latest revision as of 20:44, 1 March 2018

v t e ENS Event
22:04 Aug 12, 2016
Title	Loss of Both Loops of Essential Services Chilled Water
Event Description	This is a non-emergency notification from Waterford 3. On August 12, 2016, at 1704 CDT, the shift operating crew entered Technical Specification (TS) 3.0.3 due to both trains of Essential Services Chilled Water being inoperable. Essential Services Chilled Water Loop A had previously been declared inoperable for maintenance on August 11, 2016. On August 12, 2016, at 1704, the shift operating crew noted that Loop B Essential Services Chilled Water outlet temperature exceeded the allowed TS limit of 42 degrees Fahrenheit. Essential Chiller AB was subsequently aligned to Loop B and TS 3.0.3 was exited on August 12, 2016 at 1802 when outlet temperature was verified less than or equal to 42 degrees Fahrenheit. On August 15, 2016, subsequent review of this event determined that this event was reportable under 10 CFR 50.72(b)(3)(v)(D), 'event or condition that could have prevented fulfillment of a safety function of structures or systems that are needed to (D) mitigate the consequences of an accident' due to both Essential Services Chilled Water Loops being inoperable. The NRC Resident Inspector has been notified.

ENS 52179 +/-
Where
Waterford Louisiana (NRC Region 4)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Time - Person (Reporting Time:+64.1 h2.671 days <br />0.382 weeks <br />0.0878 months <br />)
Opened:	Maria Zamber 14:10 Aug 15, 2016
NRC Officer:	Vince Klco
Last Updated:	Aug 15, 2016
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v • d • e

v t e Emergency Notification System
Waterford with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR2023-07-30T16:19:00 [Table view]
[ENS list for Waterford]

@@ Line 16: / Line 16: @@
 | event date = 08/12/2016 17:04 CDT
 | last update date = 08/15/2016
-| title = Loss Of Both Loops Of Essential Services Chilled Water
+| title = Loss of Both Loops of Essential Services Chilled Water
 | event text = This is a non-emergency notification from Waterford 3. On August 12, 2016, at 1704 CDT, the shift operating crew entered Technical Specification (TS) 3.0.3 due to both trains of Essential Services Chilled Water being inoperable. Essential Services Chilled Water Loop A had previously been declared inoperable for maintenance on August 11, 2016. On August 12, 2016, at 1704, the shift operating crew noted that Loop B Essential Services Chilled Water outlet temperature exceeded the allowed TS limit of 42 degrees Fahrenheit. Essential Chiller AB was subsequently aligned to Loop B and TS 3.0.3 was exited on August 12, 2016 at 1802 when outlet temperature was verified less than or equal to 42 degrees Fahrenheit.
 On August 15, 2016, subsequent review of this event determined that this event was reportable under 10 CFR 50.72(b)(3)(v)(D), 'event or condition that could have prevented fulfillment of a safety function of structures or systems that are needed to (D) mitigate the consequences of an accident' due to both Essential Services Chilled Water Loops being inoperable.