ENS 51421

v t e ENS Event
02:00 Sep 24, 2015
Title	High Pressure Coolant Injection Inoperable Due to Mgu Failure
Event Description	During surveillance testing of the U2 HPCI [High Pressure Coolant Injection] system, the HPCI motor gear unit [MGU] was positioned from 100 percent to 75 percent demand to satisfy operability testing. The motor gear unit did not respond as system demand was returned to 100 percent. This indicated a failure of the MGU which requires declaration of inoperability of the HPCI System. This is a 14 day LCO. HPCI is a single train system and reportable under SAF 1.8 'Event or condition that could have prevented fulfillment of a safety function.' The licensee will be notifying the NRC Resident Inspector.

ENS 51421 +/-
Where
Dresden Illinois (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Time - Person (Reporting Time:+3.87 h0.161 days <br />0.023 weeks <br />0.0053 months <br />)
Opened:	Jeff Simpson 05:52 Sep 24, 2015
NRC Officer:	Jeff Rotton
Last Updated:	Sep 24, 2015
51421 - NRC Website
v • d • e

v t e Emergency Notification System
Dresden with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR2023-11-20T15:56:00 [Table view]
[ENS list for Dresden]

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