Letter Sequence Request |
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MONTHYEARML11350A0532012-01-0404 January 2012
Plan for the Scoping and Screening Regulatory Audit Regarding the Grand Gulf Nuclear Station, Unit 1 License Renewal Application Review
Project stage: Other
ML12009A1052012-01-18018 January 2012
Plan for the Aging Management Program Regulatory Audit Regarding the Grand Gulf Nuclear Station, Unit 1, License Renewal Application Review
Project stage: Other
ML12067A2352012-04-0303 April 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12068A2332012-04-0404 April 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12080A1912012-04-11011 April 2012
Request for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application Grand Gulf LRA RAI Set 3
Project stage: RAI
ML12074A0082012-04-12012 April 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12076A0142012-04-16016 April 2012
Request for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application (TAC No. ME7493) Grand Gulf LRA Draft RAI Set 5
Project stage: Draft RAI
ML12076A0092012-04-17017 April 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal (TAC ME7493) Grand Gulf LRA Draft RAI Set 6
Project stage: Draft RAI
ML12087A0012012-04-18018 April 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application (TAC ME7493)Grand Gulf LRA RAI Set 07
Project stage: RAI
ML12094A0092012-04-25025 April 2012
Requests for Additional Information for the Review of the Grand Gulf Nulcear Station Licesne Renewal Application
Project stage: RAI
ML12101A3602012-04-26026 April 2012
Request for Additional Information for the Review of Th Grand Gulf Nuclear Station License Renewal Application (TAC No. ME7493) Grand Gulf LRA RAI Set 09
Project stage: RAI
ML12104A2192012-04-30030 April 2012
Request for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application (TAC No. ME7493)LRA RAI Set 10
Project stage: RAI
GNRO-2012/00029, Response to Request for Additional Information (RAI) Regarding the License Renewal Application2012-05-0101 May 2012
Response to Request for Additional Information (RAI) Regarding the License Renewal Application
Project stage: Response to RAI
ML12109A2132012-05-0303 May 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application (TAC No. ME7493) Grand Gulf LRA RAI Set 11
Project stage: RAI
GNRO-2012/00036, Response to Request for Additional Information (RAI) Dated April 12, 20122012-05-0909 May 2012
Response to Request for Additional Information (RAI) Dated April 12, 2012
Project stage: Response to RAI
ML12118A5392012-05-15015 May 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12125A3732012-05-24024 May 2012
Requests for Additional Information for the Review of the Grant Gulf Nuclear Station License Renewal Application (TAC No. ME7493)Grand Gulf LRA RAI Set 17
Project stage: RAI
ML12139A0552012-05-29029 May 2012
LRA RAI Set 19
Project stage: RAI
ML12151A2652012-06-15015 June 2012
Request for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application (TAC No. ME7493) Grand Gulf LRA RAI Set 20
Project stage: RAI
ML12165A3872012-06-20020 June 2012
Scoping and Screening Methodology Audit Report Regarding the Grand Gulf Nuclear Station, Unit 1, License Renewal Application
Project stage: Other
ML12151A3682012-06-20020 June 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12152A3932012-06-22022 June 2012
Request for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12152A3452012-06-22022 June 2012
Request for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application (Tac No. ME7493)
Project stage: RAI
ML12157A0562012-06-27027 June 2012
Request for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application (TAC No. ME7493)Grand Gulf LRA RAI Set 24
Project stage: RAI
ML12164A7262012-06-27027 June 2012
RAI for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12180A5412012-07-17017 July 2012
Summary of Telephone Conference Call Held on March 14, 2012, Between NRC and Entergy Operations, Inc., Concerning RAI Pertaining to the Grand Gulf Nuclear Station, LRA
Project stage: RAI
ML12188A7062012-07-17017 July 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12188A5162012-07-23023 July 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12200A1382012-07-27027 July 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12201B4762012-07-27027 July 2012
LRA RAI Set 30
Project stage: RAI
ML12191A1872012-07-31031 July 2012
LRA RAI Telecon 2012-04-13
Project stage: RAI
ML12208A2672012-08-0707 August 2012
RAI for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12193A0712012-08-15015 August 2012
Summary of Telephone Conference Call Held on 5/15/12 Between the U.S. Nuclear Regulatory Commission and Entergy Operations, Inc., Concerning Requests for Additional Information Pertaining to the Grand Gulf Nuclear Station, LRA
Project stage: RAI
ML12220A3372012-08-15015 August 2012
RAI for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12201B5042012-08-15015 August 2012
Summary of Telephone Conference Call Held on 5/23/12 Between the U.S. Nuclear Regulatory Commission and Entergy Operations, Inc., Concerning the RAIs Pertaining to the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12202A2142012-08-15015 August 2012
5/30/12 Summary of Telephone Conference Call Held Between the U.S. Nuclear Regulatory Commission and Entergy Operations, Inc., Concerning Requests for Additional Information Pertaining to the Grand Gulf Nuclear Station, LRA
Project stage: RAI
ML12230A3102012-08-21021 August 2012
Correction to Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12201B5452012-08-28028 August 2012
Summary of Telephone Conference Call Held on 6/5/12, Between NRC and Entergy, Concerning RAI Pertaining to the Grand Gulf Nuclear Station, LRA
Project stage: RAI
ML12209A1482012-08-28028 August 2012
6/8/12 Summary of Telephone Conference Call Held Between the U.S. Nuclear Regulatory Commission and Entergy Operations, Inc., Concerning Requests for Additional Information Pertaining to the Grand Gulf Nuclear Station, LRA
Project stage: RAI
ML12234A6712012-09-0505 September 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12242A5452012-09-0707 September 2012
Revision of Schedule for the Conduct of Review of the Grand Gulf Nuclear Station, LRA
Project stage: Approval
ML12230A2472012-09-0707 September 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12214A5482012-09-14014 September 2012
7/18/12 Summary of Telephone Conference Call Held Between the U.S. Nuclear Regulatory Commission and Entergy Operations, Inc., Concerning Requests for Additional Information Pertaining to the Grand Gulf Nuclear Station, LRA
Project stage: RAI
ML12248A1582012-09-14014 September 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12270A2492012-10-0303 October 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12278A0362012-10-17017 October 2012
Requests for Additional Information for the Review of the Grand Gulf Nuclear Station License Renewal Application
Project stage: RAI
ML12286A0242012-10-19019 October 2012
RAI for the Review of the Grand Gulf Nuclear Station LRA
Project stage: RAI
GNRO-2012/00128, Response to Requests for Additional Information (RAI) Set 38 Dated 10/03/20122012-10-22022 October 2012
Response to Requests for Additional Information (RAI) Set 38 Dated 10/03/2012
Project stage: Response to RAI
ML12264A3872012-10-31031 October 2012
Summary of Telephone Conference Call Held on 8/21/12, Between the U.S. Nuclear Regulatory Commission and Entergy Nuclear Operations, Inc., Concerning Requests for Additional Information Pertaining to the Grand Gulf Nuclear Station, LRA
Project stage: RAI
ML12250A1052012-10-31031 October 2012
Summary of Telephone Conference Call Held on 8/15/12 Between the U.S. Nuclear Regulatory Commission and Entergy Operations, Inc., Concerning Requests for Additional Information Pertaining to the Grand Gulf Nuclear Station, LRA
Project stage: RAI
2012-05-15
[Table View] |
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Category:NRC Preliminary Notification of Event/Occurrence
MONTHYEARPNO-IV-16-003, Grand Gulf, Extended Plant Shutdown to Address Operations Performance2016-09-29029 September 2016
PNO-IV-16-003: Grand Gulf, Extended Plant Shutdown to Address Operations Performance
PNO-IV-12-007, A Update: Grand Gulf Nuclear Station Security Officer Lockout2012-11-21021 November 2012
PNO-IV-12-007A Update: Grand Gulf Nuclear Station Security Officer Lockout
ML12275A5682012-10-0101 October 2012
PNO-IV-12-007 Grand Gulf Nuclear Station Security Officer Lockout
PNO-IV-12-006, B Update Region IV Response to Hurricane/Severe Weather on Golf Coast2012-09-0505 September 2012
PNO-IV-12-006B Update Region IV Response to Hurricane/Severe Weather on Golf Coast
ML12243A5062012-08-30030 August 2012
PNO-IV-12-006-A Update: Region IV Response to Hurricane/Severe Weather on Golf Coast
ML12242A4262012-08-29029 August 2012
PNO-IV-12-006 Region IV Response to Hurricane/Severe Weather on Gulf Coast
PNO-IV-03-023, A: Entergy Operations, Inc., Grand Gulf Nuclear Station, Shutdown of Greater than 72 Hours (Update)2003-05-0101 May 2003
PNO-IV-03-023A: Entergy Operations, Inc., Grand Gulf Nuclear Station, Shutdown of Greater than 72 Hours (Update)
PNO-IV-02-052, A: Update of Response to Hurricane/ Severe Weather on Gulf Coast2002-10-0404 October 2002
PNO-IV-02-052A: Update of Response to Hurricane/ Severe Weather on Gulf Coast
2016-09-29
[Table view] |
September 29, 2016 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE - PNO-IV-16-003 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 IV, Arlington, Texas staff on this date.
Facility Licensee Emergency Classification Grand Gulf Nuclear Station Notification of Unusual Event P.O. Box 756 Alert Port Gibson, MS 39150 Site Area Emergency Docket: 50-416 General Emergency License No. NPF-29 X Not Applicable
SUBJECT:
GRAND GULF EXTENDED PLANT SHUTDOWN TO ADDRESS OPERATIONS PERFORMANCE DESCRIPTION:
On September 27, 2016, Grand Gulf Nuclear Station plant management notified the NRC of their intent to delay start-up of the plant, following a forced outage, to implement corrective actions to assess and resolve operational performance concerns. The plant completed a 16 day forced outage to replace a residual heat removal pump on September 24, 2016. Two separate operational performance issues occurred during startup preparation. Plant operators identified four valves that were inappropriately closed, rendering the alternate decay heat removal system inoperable. That system was required to be available while workers replaced a safety-related pump on the residual heat removal system. Additionally, plant operators opened a main feedwater isolation valve prior to securing the condensate system from a configuration that resulted in a rapid and unanticipated reactor vessel level increase from 33 inches to 151 inches.
The timeline for a plant restart is under review by plant leadership while they determine a path forward.
NRC Region IV management received notification of this plan by a telephone call from Grand Gulf plant management at about 3:00 p.m. (CDT) on September 26, 2016.
This preliminary notification is issued for information only and no further action by the staff is anticipated.
The State of Mississippi has been notified.
The information presented herein has been discussed with the licensee and is current as of 9:30 a.m. (CDT) September 29, 2016.
ADAMS ACCESSION NUMBER: ML16273A330 CONTACT: Greg Warnick at (240) 704-5884
