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Category:NRC Preliminary Notification of Event/Occurrence
MONTHYEARML12320A0202012-11-14014 November 2012
Update: PNO-I-12-007A Hurricane Sandy Update Causes Oyster Creek Alert and Shutdowns of Reactors at Nine Mile Point Unit 1, Indian Point Unit 3 and Salem Unit 1
PNO-I-12-007, Hurricane Sandy Causes Oyster Creek Alert and Shutdowns of Reactors at Nine Mile Point Unit 1, Indian Point Unit 3, and Salem Unit 12012-10-31031 October 2012
PNO-I-12-007 - Hurricane Sandy Causes Oyster Creek Alert and Shutdowns of Reactors at Nine Mile Point Unit 1, Indian Point Unit 3, and Salem Unit 1
PNO-I-12-005, Oyster Creek Reactor Shutdown and Unusual Event Due to a Loss of Offsite Power and Shutdown Greater than 72 Hours2012-07-31031 July 2012
PNO-I-12-005 - Oyster Creek Reactor Shutdown and Unusual Event Due to a Loss of Offsite Power and Shutdown Greater than 72 Hours
ML1123601032011-08-23023 August 2011
PNO-II-11-005: North Anna, Emergency Declarations Due to Seismic Event
PNO-I-09-005, A: Update: Oyster Creek Reactor Trip and Unusual Event Due to a Loss of Offsite Power and Shutdown Greater than 72 Hours2009-07-17017 July 2009
PNO-I-09-005A: Update: Oyster Creek Reactor Trip and Unusual Event Due to a Loss of Offsite Power and Shutdown Greater than 72 Hours
ML0919604862009-07-15015 July 2009
PNO-I-09-005: Exelon Generation Co. Llc., Oyster Creek Reactor Trip and Unusual Event Due to a Loss of Offsite Power and Shutdown Greater than 72 Hours
PNO-I-09-002, A: Oyster Creek, Update - Shutdown Greater than 72 Hours: Manual Reactor Scram Following Loss of Cooling to Main Transformer, Dated 05/04/20092009-05-0404 May 2009
PNO-I-09-002A: Oyster Creek, Update - Shutdown Greater than 72 Hours: Manual Reactor Scram Following Loss of Cooling to Main Transformer, Dated 05/04/2009
ML0911706642009-04-27027 April 2009
PNO-I-09-002 - Oyster Creek, Shutdown Greater than 72 Hours: Manual Reactor Scram Following Loss of Cooling to Main Transformer
PNO-I-09-001, A: Exelon Generation Company, LLC, Update - Oyster Creek Unusual Event and Automatic Reactor Scram Due to Fire in M1A Main Transformer2009-02-0505 February 2009
PNO-I-09-001A: Exelon Generation Company, LLC, Update - Oyster Creek Unusual Event and Automatic Reactor Scram Due to Fire in M1A Main Transformer
ML0903304152009-02-0202 February 2009
PNO-I-09-001: Unusual Event and Automatic Reactor Scram Due to a Fire in the M1A Main Transformer at Oyster Creek Station
PNO-I-08-013, A - Update - Oyster Creek: Automatic Reactor Scram Due to Main Transformer Fault2008-12-0505 December 2008
PNO-I-08-013A - Update - Oyster Creek: Automatic Reactor Scram Due to Main Transformer Fault
ML0833602712008-12-0101 December 2008
PNO-I-08-013: Shutdown Greater than 72 Hrs: Automatic Reactor Scram Due to Main Transformer Fault - Oyster Creek
ML0914703712008-11-30030 November 2008
Draft Preliminary Notification of Event of Unusual Occurrence, PNO-1-08-XXX, Facility Amergen Energy Company, LLC, Oyster Creek, Subject - Results of Implementation of Oyster Creek License Renewal Commitments Related to the Primary Containm
ML0914703692008-11-30030 November 2008
Draft Preliminary Notification of Event of Unusual Occurrence, PNO-1-08-XXX, Facility Amergen Energy Company, LLC, Oyster Creek, Subject - Results of Implementation of Oyster Creek Renewal Commitments Related to the Drywall Primary Containm
ML0914703702008-11-30030 November 2008
Draft Preliminary Notification of Event of Unusual Occurrence, PNO-1-08-XXX, Facility Amergen Energy Company, LLC, Oyster Creek, Subject - Results of Implementation of Oyster Creek License Renewal Commitments Related to the Drywell Primary
ML0914703722008-11-30030 November 2008
Draft Preliminary Notification of Event of Unusual Occurrence, PNO-1-08-XXX, Facility Amergen Energy Company, LLC, Oyster Creek, Subject - Results of Implementation of Oyster Creek License Renewal Commitments Related to the Primary Containm
ML0914804412008-11-30030 November 2008
Draft Preliminary Notification of Event of Unusual Occurrence, PNO-1-08-XXX, Facility Amergen Energy Company, LLC, Oyster Creek, Subject - Results of Implementation of Oyster Creek License Renewal Commitments Related to the Primary Containm
ML0914804422008-11-30030 November 2008
Draft Preliminary Notification of Event of Unusual Occurrence, PNO-1-08-XXX, Facility Amergen Energy Company, LLC, Oyster Creek, Subject - Results of Implementation of Oyster Creek License Renewal Commitments Related to the Drywall Primary
ML0914804432008-11-30030 November 2008
Draft Preliminary Notification of Event of Unusual Occurrence, PNO-1-08-XXX, Facility Amergen Energy Company, LLC, Oyster Creek, Subject - Results of Implementation of Oyster Creek License Renewal Commitments Related to the Drywall Primary
ML0914804442008-11-30030 November 2008
Draft Preliminary Notification of Event of Unusual Occurrence, PNO-1-08-XXX, Facility Amergen Energy Company, LLC, Oyster Creek, Subject - Results of Implementation of Oyster Creek License Renewal Commitments Related to the Primary Containm
ML0914804452008-11-30030 November 2008
Draft Preliminary Notification of Unusual Occurrence, PNO-1-08-XXX, Facility Amergen Energy Company, LLC, Oyster Creek, Subject - Results of Implementation of Oyster Creek License Renewal Commitments Related to the Primary Containment Drywe
ML0914804462008-11-30030 November 2008
Draft Preliminary Notification of Event of Unusual Occurrence, PNO-1-08-XXX, Facility Amergen Energy Company, LLC, Oyster Creek, Subject - Results of Implementation of Oyster Creek License Renewal Commitments Related to the Drywell Primary
ML0919605922008-11-30030 November 2008
Draft Preliminary Notification of Event of Unusual Occurrence, PNO-1-08-XXX, Results of Implementation of Oyster Creek License Renewal Commitments Related to the Drywell Primary Containment
ML0919605932008-11-30030 November 2008
Draft Preliminary Notification of Event of Unusual Occurrence, PNO-1-08-XXX Results of Implementation of Oyster Creek License Renewal Commitments Related to the Drywell Primary Containment
ML0911907252008-11-17017 November 2008
Preliminary Notification of Event of Unusual Occurrence, PNO-1-08-012; Subject Results of Implementation of Oyster Creek License Renewal Commitments Related to the Drywell Primary Containment, with Hand Written Notes
ML0911906532008-11-17017 November 2008
E-mail from K. Heater of USNRC to Various, Regarding PNO-I-08-012: Oyster Creek - Results of Implementation of License Renewal Commitments
ML0914606862008-11-14014 November 2008
E-mail from J. Richmond of USNRC to Various, Regarding Oc PNO - Nov 2008 Drywell Rev 3
ML0919004242008-11-0707 November 2008
E-mail from R. Conte of USNRC to J. Richmond, D. Tifft and D. Pelton of USNRC, Regarding Oyster Creek Preliminary Notification(Draft) and Communications Plan, Rev. 1
PNO-I-07-006, A - NRC Resident Inspector - Update - Reactor Scram on Low Reactor Vessel Water Level Due to a Trip of the 'C' Reactor Feed Pump2007-07-23023 July 2007
PNO-I-07-006A - NRC Resident Inspector - Update - Reactor Scram on Low Reactor Vessel Water Level Due to a Trip of the 'C' Reactor Feed Pump
ML0719904282007-07-17017 July 2007
PNO-I-07-006: Reactor Scram on Low Reactor Vessel Water Level Due to a Trip of the C Reactor Feed Pump
PNO-I-06-012, Oyster Creek, Evaluation of Containment Design Function2006-11-0909 November 2006
PNO-I-06-012: Oyster Creek, Evaluation of Containment Design Function
PNO-I-05-022, Alert Declaration at Oyster Creek2005-08-0808 August 2005
PNO-I-05-022 - Alert Declaration at Oyster Creek
ML0713401372003-05-22022 May 2003
Reactor Operating Events Event Notification Report, Event Number: 39876; Facility: Oyster Creek; Notification Date: 05/22/2003
PNO-I-03-016, Oyster Creek Bargaining Unit Strike at Oyster Creek (39876)2003-05-22022 May 2003
PNO-I-03-016: Oyster Creek Bargaining Unit Strike at Oyster Creek (#39876)
PNO-I-02-020, Unusual Event Due to a Hydrogen Gas Ignition in the Off-Gas System (39348)2002-11-0707 November 2002
PNO-I-02-020: Unusual Event Due to a Hydrogen Gas Ignition in the Off-Gas System (#39348)
2012-07-31
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DCS No.: 05000219071707 Date: July 23, 2007 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-I-07-006A This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region I staff on this date.
Facility Amergen Energy Company, LLC Licensee Emergency Classification Oyster Creek Notification of Unusual Event Forked River, NJ Alert Docket: 50-219 Site Area Emergency General Emergency X Not Applicable
SUBJECT:
UPDATE - REACTOR SCRAM ON LOW REACTOR VESSEL WATER LEVEL DUE TO A TRIP OF THE 'C' REACTOR FEED PUMP On July 17, 2007, at 5:22 a.m., the Oyster Creek reactor scrammed due to a low reactor water level following a trip of the 'C' Reactor Feed Pump (RFP). Reactor water level reached the low-low level setpoint which, among other actions, automatically isolated the main steam isolation valves and initiated the isolation condensers. The isolation condensers steam off plant condensate to remove decay heat. Although there was no abnormal amount of radioactivity released during the event, a small amount of activity was released by steaming off condensate that contained trace amounts of radioactive tritium. The preliminary estimates of the activity released was about 1.05 curies which resulted in a worst case offsite dose of about 0.005 millirem which is about 3000 times less than the annual organ limit of 15 millirem and 25 millirem total body.
Immediately prior to the scram, reactor water level had decreased due to a steam flow/feed flow mismatch. After the scram, water level increased due to excessive feeding causing a high reactor water level which necessitated cycling two Electromagnetic Relief Valves (EMRVs).
The steam relief from the EMRVs caused an increase in the torus temperature that was controlled by using the Containment Spray System in torus cooling mode. No emergency action level was declared as a result of this event. The reactor was placed in a cold shutdown condition at 2:00 p.m., July 17, 2007.
Preliminary information indicates that the 'C' RFP tripped due to an electrical fault. Planned licensee actions include a review to determine the cause of the 'C' RFP trip, repairs to the 'C' RFP, and a review of plant and operator response during the event.
The NRC resident inspector responded to the site and has been supported by regional inspectors during the NRC's initial assessment of this event. The NRC is continuing to assess the licensee's response to this event. The facts of this Preliminary Notification were verified with the Oyster Creek Plant Manager and were current as of 4:00 p.m., July 17, 2007.
2 AmerGen has issued an event notification (EN#43495) in accordance to 10 CFR 50.72 and has issued press releases. The state of New Jersey has been notified.
UPDATE - On July 21, 2007, AmerGen commenced reactor startup at 10:50 p.m. and achieved criticality at 1:11 a.m. on July 22. The generator was placed on line at 6:56 p.m. that evening.
Major work during the forced outage included repairs of B High Pressure Feedheater and Intermediate Range Nuclear Instrumentation, and replacement of the C RFP motor. Repairs continue on the motor of the 'C' RFP due to vibration and will limit the plant power to 70% until this issue is resolved. NRC inspectors observed portions of the repair and startup activities.
This PN is issued for information only and no further updates are anticipated.
ADAMS Accession Number: ML072040203 CONTACT: G. Scott Barber (610) 337-5232
3 DISTRIBUTIONS:
BY E-MAIL:
OWFN TWFN Chairman Klein Comm. McGaffigan Jr. NMSS Comm. Jaczko OIG Comm. Lyons RES OIP OCA OGC EDO OE NRR SECY Regional Offices BY FAX:
DOT:Trans INPO NSAC RI Resident Office Licensee: AmerGen Energy Company, LLC Oyster Creek Nuclear Generating Station ADAMS ML072040203 SUNSI Review Complete: AAR (Reviewers Initials)
DOCUMENT NAME: T:\DRP\PNs\PNO-I-07-006A UPDATE Oyster Creek scram due to a loss of C RFP Rev 2.wpd After declaring this document An Official Agency Record it will be released to the Public.
To receive a copy of this document, indicate in the box: "C" = Copy without attachment/enclosure "E" = Copy with attachment/enclosure "N" = No copy OFFICE RI/DRP RI/ORA RI/ORA RI/DRP NAME ARosebrook/AAR DScrenci/DPS MMcLaughlin/MM DLew/DCL DATE 07/23 /07 07/23/07 07/23/07 07/23/07 OFFICIAL RECORD COPY Region I Form 83 (Rev. July 2, 2003)