ENS 57195: Difference between revisions

v t e ENS Event
12:04 Jun 27, 2024
Title	Automatic Start of Turbine Driven Auxiliary Feedwater Pump
Event Description	The following information was provided by the licensee email: On June 27, 2024, at 0804 [EDT], D.C. Cook Unit 2 had an automatic start of the turbine driven auxiliary feedwater pump (TDAFP) following a controlled down power and manual reactor trip at approximately 17 percent power. The automatic start of the TDAFP was due to a steam generator water level 'low low' signal following the reactor trip. The down power and trip were performed in accordance with normal shutdown procedures to comply with the required action C.1 of technical specification 3.4.13, 'reactor coolant system operational leakage.' Reference event notification number EN57194. An automatic start of the TDAFP is an eight hour report per 10CFR 50.72(b)(3)(iv)(A). Unit 2 is being supplied by offsite power. All control rods fully inserted. Steam generators are being fed by both motor driven auxiliary feedwater pumps. Decay heat is being removed via the steam dump system to the main condenser. Preliminary evaluation indicates plant systems functioned normally following the reactor trip. D.C. Cook Unit 2 remains in Mode 3 to repair the previously reported reactor coolant system leakage through valve 2-QRV-251, 'CVCS [chemical and volume control system] charging pumps discharge flow control' valve packing. The NRC Resident Inspector has been notified.

ENS 57195 +/-
Where
Cook Michigan (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(iv)(A), System Actuation
Time - Person (Reporting Time:+1.98 h0.0825 days <br />0.0118 weeks <br />0.00271 months <br />)
Opened:	Rob Eisenman 14:03 Jun 27, 2024
NRC Officer:	Brian P. Smith
Last Updated:	Jun 28, 2024
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v • d • e

v t e Emergency Notification System
Cook with 10 CFR 50.72(b)(3)(iv)(A), System Actuation
WEEKMONTHYEAR2024-06-27T12:04:00 [Table view]
[ENS list for Cook]

@@ Line 22: / Line 22: @@
 Unit 2 is being supplied by offsite power. All control rods fully inserted. Steam generators are being fed by both motor driven auxiliary feedwater pumps. Decay heat is being removed via the steam dump system to the main condenser. Preliminary evaluation indicates plant systems functioned normally following the reactor trip. D.C. Cook Unit 2 remains in Mode 3 to repair the previously reported reactor coolant system leakage through valve 2-QRV-251, 'CVCS [chemical and volume control system] charging pumps discharge flow control' valve packing.
 The NRC Resident Inspector has been notified.
-| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2024/20240628en.html#en57195
+| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2024/20240701en.html#en57195
 }}{{unit info
 | Unit = 2

Latest revision as of 07:20, 1 July 2024