ENS 56282: Difference between revisions

v t e ENS Event
03:01 Dec 20, 2022
Title	Manual Scram Due to Loss of Feedwater Pump
Event Description	The following information was provided by the licensee via email: At 2101 [CST] on December 19, 2022, a manual reactor scram was initiated at Grand Gulf Nuclear Station (GGNS). Following the reactor scram, the high pressure core spray (HPCS) system was used to maintain reactor water level. The manual [reactor protection system] RPS actuation is being reported in accordance with 10 CFR 50.72(b)(2) and the HPCS actuation is being reported in accordance with 10 CFR 50.72(b)(3). At 2058, GGNS experienced a loss of a condensate booster pump. At 2101, the `A' reactor feedwater pump tripped and the reactor was manually scrammed. All control rods were fully inserted into the core. At 2104, the `B' reactor feedwater pump tripped and HPCS was manually started. HPCS was manually injected to maintain reactor water level at 2121. The `A' reactor feedwater pump was successfully restarted at 2126. GGNS is currently in Mode 3. Reactor level is being maintained with the `A' reactor feedwater pump and pressure is being maintained with the turbine bypass valves. The NRC Resident Inspector was notified.

ENS 56282 +/-
Where
Grand Gulf Mississippi (NRC Region 4)
Reporting

10 CFR 50.72(b)(2)(iv)(B), RPS Actuation 10 CFR 50.72(b)(3)(iv)(A), System Actuation
Time - Person (Reporting Time:+-2.62 h-0.109 days <br />-0.0156 weeks <br />-0.00359 months <br />)
Opened:	Jason Overcash 00:24 Dec 20, 2022
NRC Officer:	Lloyd Desotell
Last Updated:	Dec 20, 2022
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v • d • e

v t e Emergency Notification System
Grand Gulf with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation
WEEKMONTHYEAR2024-03-26T16:15:00 [Table view]
[ENS list for Grand Gulf]

@@ Line 9: / Line 9: @@
 | unit = 1
 | utype = GE-6
-| cfr = 10 CFR 50.72(b)(2)(iv)(B)
+| cfr = 10 CFR 50.72(b)(2)(iv)(B), 10 CFR 50.72(b)(3)(iv)(A)
 | emergency class = Non Emergency
 | notification date = 12/20/2022 00:24
@@ Line 23: / Line 23: @@
 GGNS is currently in Mode 3. Reactor level is being maintained with the `A' reactor feedwater pump and pressure is being maintained with the turbine bypass valves.
 The NRC Resident Inspector was notified.
-| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2022/20221221en.html#en56282
+| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2022/20221222en.html#en56282
 }}{{unit info
 | Unit = 1

Latest revision as of 14:59, 4 January 2024