ENS 43329: Difference between revisions

v t e ENS Event
19:02 Apr 30, 2007
Title	Reactor Trip Due to Grass Intrusion Into Circulating Water Intake Structure
Event Description	{{#Wiki_filter:A manual trip of Salem Unit 1 was initiated due to a loss of the circulators from heavy grassing at the circulating water intake structure. All rods fully inserted on the trip and all systems responded as designed, with decay heat being removed via the atmospheric relief valves and subsequently the steam dump system. All Auxiliary Feedwater pumps auto started as expected on low steam generator levels from the trip. Salem Unit 1 had entered the abnormal operating procedure for circulating water due to two (2) circulators being out of service; one circulator previously emergency tripped due to excessive traveling water screen [differential pressure] and a second circulator emergency tripped soon thereafter. The procedure provides guidance to trip the plant if less than three (3) circulators are in service and power is above ten (10) percent. Two (2) of the remaining four (4) in-service circulators emergency tripped due to excessive traveling water screen differential pressure. At this point the manual reactor trip was initiated. The crew entered emergency operating procedures and stabilized the plant at no load conditions. No personnel injuries have occurred as a result of the trip. Salem Unit 2 was not affected and is operating at 100% power. Salem Unit 1 is currently in Mode 3. Reactor Coolant System temperature is 547� F with pressure at 2235 psig. All ECCS and ESF Systems are available. Actions are being taken to return circulators to service. The licensee notified the NRC Resident Inspector. }}[[Event description::Description::{{#Regex_clear:A manual trip of Salem Unit 1 was initiated due to a loss of the circulators from heavy grassing at the circulating water intake structure. All rods fully inserted on the trip and all systems responded as designed, with decay heat being removed via the atmospheric relief valves and subsequently the steam dump system. All Auxiliary Feedwater pumps auto started as expected on low steam generator levels from the trip. Salem Unit 1 had entered the abnormal operating procedure for circulating water due to two (2) circulators being out of service; one circulator previously emergency tripped due to excessive traveling water screen [differential pressure] and a second circulator emergency tripped soon thereafter. The procedure provides guidance to trip the plant if less than three (3) circulators are in service and power is above ten (10) percent. Two (2) of the remaining four (4) in-service circulators emergency tripped due to excessive traveling water screen differential pressure. At this point the manual reactor trip was initiated. The crew entered emergency operating procedures and stabilized the plant at no load conditions. No personnel injuries have occurred as a result of the trip. Salem Unit 2 was not affected and is operating at 100% power. Salem Unit 1 is currently in Mode 3. Reactor Coolant System temperature is 547� F with pressure at 2235 psig. All ECCS and ESF Systems are available. Actions are being taken to return circulators to service. The licensee notified the NRC Resident Inspector. }}\| ]]

ENS 43329 +/-
Where
Salem New Jersey (NRC Region 1)
Reporting

10 CFR 50.72(b)(2)(iv)(B), RPS Actuation
Time - Person (Reporting Time:+-2.22 h-0.0925 days <br />-0.0132 weeks <br />-0.00304 months <br />)
Opened:	Richard Desanctis 16:49 Apr 30, 2007
NRC Officer:	Pete Snyder
Last Updated:	Apr 30, 2007
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v • d • e

v t e Emergency Notification System
Salem with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation
WEEKMONTHYEAR2022-12-24T07:22:00 [Table view]
[ENS list for Salem]

@@ Line 16: / Line 16: @@
 | event date = 04/30/2007 15:02 EDT
 | last update date = 04/30/2007
-| title = Reactor Trip Due To Grass Intrusion Into Circulating Water Intake Structure
+| title = Reactor Trip Due to Grass Intrusion Into Circulating Water Intake Structure
 | event text = A manual trip of Salem Unit 1 was initiated due to a loss of the circulators from heavy grassing at the circulating water intake structure.  All rods fully inserted on the trip and all systems responded as designed, with decay heat being removed via the atmospheric relief valves and subsequently the steam dump system.  All Auxiliary Feedwater pumps auto started as expected on low steam generator levels from the trip.  Salem Unit 1 had entered the abnormal operating procedure for circulating water due to two (2) circulators being out of service; one circulator previously emergency tripped due to excessive traveling water screen [differential pressure] and a second circulator emergency tripped soon thereafter.  The procedure provides guidance to trip the plant if less than three (3) circulators are in service and power is above ten (10) percent.  Two (2) of the remaining four (4) in-service circulators emergency tripped due to excessive traveling water screen differential pressure.  At this point the manual reactor trip was initiated.  The crew entered emergency operating procedures and stabilized the plant at no load conditions.
 No personnel injuries have occurred as a result of the trip. Salem Unit 2 was not affected and is operating at 100% power.

v t e Unit 1
W-4-LP
Reactor critical	Critical
Scram	No
Before	Power Operation (80 %)
After	Hot Standby (0 %)

ENS 43329: Difference between revisions

Latest revision as of 22:16, 1 March 2018

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ENS 43329: Difference between revisions

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