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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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Text
Preliminary Notification DCS No.:
0500021911XX08 Date: November XX, 2008 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-1-08-XXX Facility Licensee Emergency Classification AmerGen Energy Company, LLC Notification of Unusual Event Oyster Creek Alert Forked River, New Jersey __ Site Area Emergency Docket: 50-219 _ General Emergency X Not Applicable
Subject:
RESULTS OF IMPLEMENTATION OF OYSTER CREEK LICENSE RENEWAL COMMITMENTS RELATED TO THE CONTAINMENT DESIGN FUNCTION The NRC staff conducted an on-site inspection of AmerGen's actions related to license renewal commitments to be implemented during the 2008 refueling outage at the Oyster Creek Nuclear Generating Station (OCNGS). In particular, the NRC review involved a multi-week inspection of AmerGen's three aging management programs associated with the primary containment (drywell): Containment Metallic Liner Inservice Inspection; Structures Monitoring Program; and Protective Coating Monitoring and Maintenance Program. Observable aspects of other aging management programs were also reviewed: Buried Piping; Non-EQ Electrical Cables and Connections and Inaccessible Medium Voltage Cables; Inspection of Water-Control Structures; One Time Inspection Program; and Metal Fatigue of Reactor Coolant Pressure Boundary. In accordance with the NRC's agreement with the State of New Jersey, State Engineers observed portions of the NRC's staff review. Based on the results of the NRC's inspection activities, the NRC staff found: 1) for the areas sampled by the inspector4s/ (b)(5) .J S (b)(5) j nd no significant adverse conditions; -
- 2) there were no safety significant conditions with respect to the primary containment that would prohibit plant startup., o*
prohibit plants(b)(5) n the mid-1980s, GPU Nuclear (as
'4i~ensee) identified corrosion of the shell ot the UUNUS containment drywell in the sandbed region. Initial licensee actions were not effective in arresting corrosion, and in 1992, all sand was removed from the sandbed region and the accessible exterior surfaces of the drywell shell were cleaned and coated with an epoxy paint. Ultrasonic test (UT) measurements of the drywell shell thickness were taken in 1992 and 1996, and indicated that the corrosion had been effectively arrested. This information was confirmed in the outages for 2006 and this year.
On October 24, 2008, OCNGS shut down for a refueling and maintenance outage. Scheduled outage work included the implementation of various license renewal aging management programs using various non-destructive testing such as ultrasonic testing (UT) and visual testing (VT).
ac~r~ wit theFreeoofI*mg, L Exemposons .... . . ,*mMo c FOIAIPA
Preliminary Notification With respect to the drywell, the NRC staff inspection throughout the outage focused on:
- 1. Non-destructive examination results of the drywell shell and torus and related AmerGen evaluations.
- 2. The condition of the inside of the drywell, including trenches in the floor, and the outside of the drywell shell in the sand bed region.
- 3. The integrity of the epoxy coating in light of four blisters found in Bay No. 11 and the integrity of the seal joint between the drywell and sandbed region floor in light of the seal separation noted in Bay No. 3.
- 4. The potential impact of water leaking by the strippable coating in the reactor refueling cavity and from various repairs to the containment on the design and licensing bases of the drywell.
On a sampling basis, the NRC staff had the following observations as a result of Amergen's implementation of license renewal commitments for the 2008 refueling outage:
- 1. UT measurements on the drywell met the licensee acceptance criteria and the acceptance criteria are based on the current licensing basis.
- 2. Work repair improved the functionality to the epoxy coating on the outside of the drywell shell in the former sandbed region and enhanced the seals between the drywell and sandbed region floor. Amergen reported that the blistering was expected; they are detectable by VT; the cause, although not specifically known, appeared to be related to molecular interactions through penetration of moisture in the atmosphere through the epoxy coating.
- 3. The strippable coating at a portion of the reactor cavity liner had some delamination causing water to enter the cavity trough and sandbed region (moisture not a flood of water). As a result Amergen enhanced its monitoring for water in the sandbed region; delayed closeout of these areas until after the reactor cavity was drained; and they will be factoring in additional actions for the 2010 outage to determine if there is any appreciable corrosion on the side of the drywell effect by water impingement in the 2008 outage.
Through the implementation of Aging Management Programs, Amergen identified and fixed the problems found in Bay No. 11 and Bay No. 3 of the sandbed region. The degradations on the coating and the potentially degrading seals, however slight, were barrier systems used to protect the drywell, the safety related target for which the barriers exist. The problems identified by the implementation of aging management programs appeared to have had minimal impact on the drywell itself or corrosion rate remained very small.
Based on a review of the technical information, the NRC staff determined that AmerGen has sufficient justification to restart OCNGS.
The State of New Jersey has been notified and no further updates are planned.
This PN is being issued for information only and will not be updated.
ADAMS Accession Number: ML .....................
CONTACT: Richard J. Conte John Richmond Qnrc.gov anrc.gov (610) 337-5183 (610) 337-5XXX