ENS 41085: Difference between revisions

v t e ENS Event
19:00 Oct 2, 2004
Title	Reactor Power Being Reduced Due to Entering Ts 3.0.3 Because of Inopeable Recirc Vent System
Event Description	At 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br /> the plant commenced reactor shutdown from 100% power for entering T.S. 3.0.3 due to both trains of the Emergency Recirc Vent System being declared inoperable. The reactor will be in mode 2 by 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br />, mode 3 by 0200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> on 10/03 and mode 4 by 0200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> on 10/04. If the problem is corrected, they will terminate the shutdown. The NRC Resident Inspector was notified. HOO Note: see event 41084 * * UPDATE ON 10/02/04 AT 1940 EDT FROM FREDERICK SMITH TO GERRY WAIG * * * Update to [Event] Notifications 41084 and 41085: At 1840 [EDT] on 10/02/04 it was determined that the apparent slow response times of the Control Room Emergency Recirculation [CRER] dampers was due to a malfunctioning relay in the initiation circuit, not due to failure of the dampers. The LCO actions associated with the CRER system were exited and the actions associated with the initiation instrument were entered. Therefore the plant is no longer required to shutdown per T.S. 3.0.3. The plant shutdown has been terminated. Plant power will be returned to 100%. The licensee has notified the NRC resident Inspector. Notified R3DO (Thomas Kozak). * * RETRACTION FROM KEN MEADE TO BILL HUFFMAN ON 10/25/04 AT 1433 EDT * * * At 1300 on 10/02/04, results of a surveillance indicated that dampers in both trains of the Control Room Emergency Recirculation System (CRERS) were slower than allowed by Technical Specifications (TS) requiring both trains of the CRERS to be declared inoperable. With both trains inoperable, Technical Specification 3.0.3 was entered which required a plant shutdown. The shutdown was commenced at 1500. This condition was reported as required in Event Notification 41085. Additionally, with both CRERS trains inoperable, this condition was determined to be reportable as a loss of safety function (accident mitigation) and was reported as required in Event Notification 41084. Subsequently, it was determined that the failure was the result of a defective time delay relay in the radiation monitor initiation circuit. Other inputs that would have caused the dampers to reposition in an accident were not impacted. The appropriate TS (3.3.7.1), for the radiation monitor, was entered and TS 3.0.3 was exited. The significant actions required by this TS were to restore the function within 7 days or place the system in emergency recirculation. It did not require entry into an action to shutdown. When this condition was identified, TS 3.0.3 was exited, the shutdown was terminated, and the plant was restored to full power. Since a TS required shutdown was not required, Event Notification 41085 is being retracted. The licensee has notified the NRC Resident Inspector. NRC R3DO(Gardner) has been notified.

ENS 41085 +/- *RETRACTED*
Where
Perry Ohio (NRC Region 3)
Reporting

10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown
Time - Person (Reporting Time:+-3.63 h-0.151 days <br />-0.0216 weeks <br />-0.00497 months <br />)
Opened:	Robert Kidder 15:22 Oct 2, 2004
NRC Officer:	Chauncey Gould
Last Updated:	Oct 25, 2004
41085 - NRC Website Loading map... {"minzoom":false,"maxzoom":false,"mappingservice":"leaflet","width":"350px","height":"250px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"zoom":6,"defzoom":14,"layers":["OpenStreetMap"],"image layers":[],"overlays":[],"resizable":false,"fullscreen":false,"scrollwheelzoom":true,"cluster":false,"clustermaxzoom":20,"clusterzoomonclick":true,"clustermaxradius":80,"clusterspiderfy":true,"geojson":"","clicktarget":"","imageLayers":[],"locations":[{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca class=\"mw-selflink selflink\"\u003EENS 41085\u003C/a\u003E - \u003Ca href=\"/Perry\" title=\"Perry\"\u003EPerry\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EReactor Power Being Reduced Due to Entering Ts 3.0.3 Because of Inopeable Recirc Vent System\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 41085 - Perry\n","link":"","lat":41.79572777777778,"lon":-81.145375,"icon":"/w/images/a/ad/FirstEnergy_icon.png"}],"imageoverlays":null}
v • d • e

v t e Emergency Notification System
Perry with 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown
WEEKMONTHYEAR2024-05-23T08:00:00 [Table view]
[ENS list for Perry]

@@ Line 17: / Line 17: @@
 | event date = 10/02/2004 15:00 EDT
 | last update date = 10/25/2004
-| title = Reactor Power Being Reduced Due To Entering Ts 3.0.3 Because Of Inopeable Recirc Vent System
+| title = Reactor Power Being Reduced Due to Entering Ts 3.0.3 Because of Inopeable Recirc Vent System
 | event text = At 1500 hours the plant commenced reactor shutdown from 100% power for entering T.S. 3.0.3 due to both trains of the Emergency Recirc Vent System being declared inoperable.  The reactor will be in mode 2 by 2000 hours, mode 3 by 0200 hours on 10/03 and mode 4 by 0200 hours on 10/04.   If the problem is corrected, they will terminate the shutdown.
 The NRC Resident Inspector was notified.

v t e Unit 1
GE-6
Reactor critical	Critical
Scram	No
Before	Power Operation (100 %)
After	Power Operation (83 %)

ENS 41085: Difference between revisions

Latest revision as of 22:22, 1 March 2018

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ENS 41085: Difference between revisions

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