ENS 47807

v t e ENS Event
22:35 Apr 4, 2012
Title	Inoperable Accident Mitigation Equipment
Event Description	On 4/4/2012 at 1517 EDT, the 'A' Emergency Diesel Generator (EDG) was declared inoperable for performance of a maintenance surveillance. At 1835 EDT on 4/4/2012 the 'B' Control Structure Chiller was declared inoperable due to an unrelated problem. [With] the 'B' Control Structure Chiller inoperable coincident with the 'A' EDG inoperable, the 'A' Control Structure Chiller would not be available to perform its design function on a loss of offsite power. This is a condition that, at the time of discovery, could have prevented fulfillment of a Safety Function and is reportable under 50.73(a)(2)(v) as an 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> notification. Note that Technical Specifications allows four hours to correct the condition before further actions are required, i.e. declare the features ('A' Control Structure Chiller) supported by the inoperable diesel inoperable. The 'A' EDG was restored to operable at 2200 which restored safety function capability for the 'A' Control Structure Chiller. The licensee notified the NRC Resident Inspector.

ENS 47807 +/-
Where
Susquehanna Pennsylvania (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
LER:	05000387/LER-2012-002
Time - Person (Reporting Time:+0.4 h0.0167 days <br />0.00238 weeks <br />5.4792e-4 months <br />)
Opened:	Ron Fry 22:59 Apr 4, 2012
NRC Officer:	Pete Snyder
Last Updated:	Apr 4, 2012
47807 - NRC Website
v • d • e

v t e Emergency Notification System
Susquehanna with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR2023-04-08T00:52:00 [Table view]
[ENS list for Susquehanna]

Navigation menu