ENS 49888: Difference between revisions

ENS 49888 +/-
Where
	Nine Mile Point ; New York (NRC Region 1)
Reporting
	10 CFR 50.72(b)(2)(iv)(B), RPS Actuation
Time - Person (Reporting Time:+-1.13 h-0.0471 days <br />-0.00673 weeks <br />-0.00155 months <br />)
Opened:	Ryan Hamilton; 19:20 Mar 10, 2014
NRC Officer:	Daniel Mills
Last Updated:	Mar 10, 2014
	49888 - NRC Website
	v • d • e

Latest revision as of 21:51, 1 March 2018

@@ Line 16: / Line 16: @@
 | event date = 03/10/2014 16:28 EDT
 | last update date = 03/10/2014
-| title = Reactor Scram Due To Actuation Of The Alternate Rod Insertion System
+| title = Reactor Scram Due to Actuation of the Alternate Rod Insertion System
 | event text = At 1628 EDT Nine Mile Point (NMP) Unit 2 experienced an actuation of the Alternate Rod Insertion (ARI) system which resulted in a reactor scram. Coincident with the scram, the Reactor Core Isolation Cooling (RCIC) system initiated.
 Prior to the event, maintenance personnel were working in the vicinity of a reactor vessel level instrumentation rack and may have agitated the common drain line of the transmitters. A prompt investigation is underway to investigate the incident.

v t e ENS Event
20:28 Mar 10, 2014
Title	Reactor Scram Due to Actuation of the Alternate Rod Insertion System
Event Description	At 1628 EDT Nine Mile Point (NMP) Unit 2 experienced an actuation of the Alternate Rod Insertion (ARI) system which resulted in a reactor scram. Coincident with the scram, the Reactor Core Isolation Cooling (RCIC) system initiated. Prior to the event, maintenance personnel were working in the vicinity of a reactor vessel level instrumentation rack and may have agitated the common drain line of the transmitters. A prompt investigation is underway to investigate the incident. The actuation signal for the RCIC system was invalid because reactor vessel level did not reach level two and the actuation was not in response to actual plant conditions or parameters. The reactor scram is reportable in accordance with 10 CFR 50.72(b)(2)(iv)(B) as, 'Any event or condition that results in actuation of the reactor protection system (RPS) when the reactor is critical.' The event has been entered into the NMP corrective action program as CR-2014-001963. The NRC Resident Inspector has been notified. The licensee has notified the State of New York. The reactor is shutdown with all rods inserted. Decay heat is being rejected to the condenser and reactor water level is being maintained by condensate, feedwater, reactor water clean up, and control rod drive systems.

v t e Emergency Notification System
Nine Mile Point with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation
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