| 3-28-2017 | At 1808 hours0.0209 days <br />0.502 hours <br />0.00299 weeks <br />6.87944e-4 months <br /> on 1/27/17, Grand Gulf Nuclear Station entered into LCO 3.5.1.6 when the High Pressure Core Spray ( HPCS) Jockey Pump (Component Function Identifier- P) failed and the HPCS System was declared inoperable. The Reactor Core Isolation Cooling ( RCIC) System was verified operable and investigation into the cause was initiated. Under those plant conditions the Plant Technical Specifications action to restore the HPCS System to operable status allows a 14 day completion time.
No other safety systems were inoperable at the time of this event.
The decision was made to disassemble the HPCS Jockey Pump and rebuild the pump using parts from the warehouse which was completed on 1/29/17. The pump was tested to demonstrate functionality of the pump on 1/29/17 and the system was returned to service. |
|---|
|
|---|
Category:Letter
MONTHYEARML24012A1422024-01-31031 January 2024
Exemption from Select Requirements of 10 CFR Part 73 (EPID L-2023-LLE-0051 (Security Notifications, Reports, and Recordkeeping and Suspicious Activity Reporting))
IR 05000416/20230042024-01-25025 January 2024
Integrated Inspection Report 5000416/2023004
ML24018A0222024-01-18018 January 2024
Core Operating Limits Report (COLR) Cycle 24, Revision 2
IR 05000416/20243012024-01-16016 January 2024
NRC Initial Operator Licensing Examination Approval 05000416/2024301
ML24012A1962024-01-12012 January 2024
Response to 2nd Round Request for Additional Information Concerning Relief Request Number EN-RR-22-001 Proposed Alternative to Use ASME Code Case N-752, Risk-Informed Categorization and
ML23349A1672023-12-21021 December 2023
Request for Withholding Information from Public Disclosure
ML23348A3572023-12-14014 December 2023
Application to Revise Technical Specifications to Use Online Monitoring Methodology Slides and Affidavit for Pre-Submittal Meeting
ML23348A3712023-12-14014 December 2023
Notification of an NRC Fire Protection Baseline Inspection (NRC Inspection Report (05000416/2024011) and Request for Information
ML23340A2222023-12-13013 December 2023
Project Manager Assignment
ML23352A0292023-12-13013 December 2023
Entergy - 2024 Nuclear Energy Liability Evidence of Financial Protection
ML23340A1592023-12-13013 December 2023
Entergy Operations, Inc. - Entergy Fleet Project Manager Assignment
ML23333A1362023-11-29029 November 2023
Supplement to Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation
ML23325A1422023-11-21021 November 2023
Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation
IR 05000416/20234032023-11-13013 November 2023
Security Baseline Inspection Report 05000416/2023403 Cover Letter
ML23311A2082023-11-0909 November 2023
Reassignment of U.S. Nuclear Regulatory Commission Branch Chief in the Division of Operating Reactor Licensing for Plant Licensing Branch IV
IR 05000416/20230032023-11-0808 November 2023
Integrated Inspection Report 05000416/2023003
ML23270B9932023-09-29029 September 2023
Request to Update ASME Boiler & Pressure Vessel Code Relief Request SE with NRC-Approved Revision of Bwrip Guidelines (GG-ISI-020 & RBS-ISI-019) (EPID L-2022-LLR-0090) - Non-Proprietary
ML23270B1892023-09-27027 September 2023
Evacuation Time Estimate Study
ML23269A1242023-09-27027 September 2023
Request for Withholding Information from Public Disclosure
ML23240A3952023-08-28028 August 2023
Reply to a Notice of Violation; EA-23-019
IR 05000416/20230052023-08-21021 August 2023
Updated Inspection Plan for Grand Gulf Nuclear Station (Report 05000416/2023005)
ML23226A1002023-08-18018 August 2023
Regulatory Audit in Support of License Amendment Requests to Adopt TSTF-505, Revision 2, and 10 CFR 50.69
IR 05000416/20230022023-08-0808 August 2023
Integrated Inspection Report 05000416/2023002 and Independent Spent Fuel Storage Installation Inspection Report 07200050/2023001
IR 05000416/20234042023-08-0707 August 2023
Material Control and Accounting Program Inspection Report 05000416/2023404
IR 05000416/20230912023-07-28028 July 2023
Final Significance Determination of a Green Finding and Notice of Violation; NRC Inspection Report 05000416/2023091
ML23208A2112023-07-27027 July 2023
Entergy Operations Inc., Application to Revise Technical Specifications to Adopt TSTF-205, Revision of Channel Calibration, Channel Functional Test, and Related Definitions
ML23166B0712023-06-15015 June 2023
Reply to Notice of Violation EA-22-104 and EA-22-115
ML23166B0662023-06-15015 June 2023
Response to NRC Integrated Inspection Report 05000416/2023001
ML23159A2302023-06-0808 June 2023
Response to Request for Additional Information Concerning Request to Update ASME Code Relief Request Safety Evaluations with NRC-Approved Revision of BWRVIP Guidelines (GG-ISI-020, and RBS-ISI-019)
GNRO-2023/00014, License Amendment Request to Revise Technical Specifications to Adopt Risk Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b2023-06-0606 June 2023
License Amendment Request to Revise Technical Specifications to Adopt Risk Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b
GNRO-2023/00015, Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors2023-06-0606 June 2023
Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors
ML23122A1632023-05-18018 May 2023
NRC Inspection Report 05000416/2023090 and Preliminary White Finding
IR 05000416/20234022023-05-17017 May 2023
Security Baseline Inspection Report 05000416/2023402
ML23110A8002023-05-10010 May 2023
Notice of Violation; Integrated Inspection Report 05000416/2023001 and NRC Investigation Report 4-2022-004
ML23130A2732023-05-10010 May 2023
and Waterford 3 Steam Electric Station - Response to Regulatory Issue Summary 2023-01, Preparation and Scheduling of Operator Licensing Examinations
IR 05000416/20230012023-05-10010 May 2023
Notice of Violation; Integrated Inspection Report 05000416/2023001 and NRC Investigation Report 4-2022-004
ML23117A2172023-05-0101 May 2023
Safety Evaluation for Quality Assurance Program Manual Reduction in Commitment
ML23117A0422023-04-27027 April 2023
Annual Radioactive Effluent Release Report (ARERR)
ML23111A2132023-04-21021 April 2023
Responses to RAI Concerning Relief Request Number EN-RR-22-001 Proposed Alternative to Use ASME Code Case N-752, Risk-Informed Categorization and Treatment for Repair/ Replacement Activities
ML23110A1122023-04-20020 April 2023
Annual Report for Entergy Quality Assurance Program Manual Changes Under 10 CFR 50.54(a)(3), 10 CFR 71.106, and 10 CFR 72.140(d). Notification of Application of Approved Appendix B to 10 CFR 72 Subpart G
ML23110A0552023-04-20020 April 2023
Annual Radiological Environmental Operating Report (AREOR)
ML23103A1022023-04-13013 April 2023
Annual Report of Individual Monitoring - NRC Form 5 for 2022 Per 10 CFR 20.2206
ML23102A1482023-04-12012 April 2023
Notification of NRC Initial Operator Licensing Examination 05000416/2024301
ML23089A0602023-03-30030 March 2023
Entergy Operations, Inc. - Fleet Project Manager Assignment
ML23088A3922023-03-29029 March 2023
Nuclear Onsite Property Damage Insurance (10 CFR 50.54(w)(3))
ML23079A2772023-03-21021 March 2023
U.S. Nuclear Regulatory Commission Presentation at the May 1, 2023, Port Gibson City Council Meeting
ML23080A2882023-03-21021 March 2023
Decommissioning Funding Status Report Per 10 CFR 50.75(f)(1) Entergy Operations, Inc
IR 05000416/20230112023-03-0808 March 2023
Design Basis Assurance Inspection Report 05000416/2023011
2024-01-31
[Table view]
Category:Licensee Event Report (LER)
MONTHYEAR05000416/LER-2016-0092017-08-16016 August 2017
Entry into Mode of Applicability with the Oscillation Power Range Monitor Upscale Settings Incorrectly Set, LER 16-009-01 for Grand Gulf, Unit 1, Regarding Entry into Mode of Applicability with the OPRM Upscale Settings Incorrectly Set
05000416/LER-2016-0082017-08-16016 August 2017
Entry into Mode of Applicability with the Alternate Decay Heat Removal System Inoperable, LER 16-008-001 for Grand Gulf, Unit 1, Regarding Entry into Mode of Applicability with the Alternate Decay Heat Removal System Inoperable
05000416/LER-2017-0012017-03-28028 March 2017
High Pressure Core Spray (HPCS) Jockey Pump Trip, LER 17-001-00 for Grand Gulf, Unit 1, Regarding High Pressure Core Spray Jockey Pump Trip
05000416/LER-2016-0012016-05-16016 May 2016
Valid Engineered Safety Feature Actuation and Temporary Loss of Residual Heat Removal, LER 16-001-00 for Grand Gulf, Unit 1, Regarding Valid Engineered Safety Feature Actuation and Temporary Loss of Residual Heat Removal
GNRO-2014/00049, Report Pursuant to 10 CFR 71.95 (a)(3) and (B) of Seven Potential Instances of Noncompliance with Certificate of Compliance No. 9233 for TN-RAM Package, Revision 112014-07-31031 July 2014
Report Pursuant to 10 CFR 71.95 (a)(3) and (B) of Seven Potential Instances of Noncompliance with Certificate of Compliance No. 9233 for TN-RAM Package, Revision 11
ML12157A1822012-05-23023 May 2012
Attachment 9 to GNRO-2012/00039 - Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit - Hydrology Patton - Attachment L Labeled Reporting Documentation - Unit 2 Sumps.
ML0627100452005-08-22022 August 2005
Final Precursor Analysis - Grand Gulf, Unit 1
2017-08-16
[Table view] |
Reported lessons learned are incorporated into the licensing process and fed back to industry.
Send comments regarding burden estimate to the FOIA, Privacy and Information Collections Branch (T-5 F53), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by e-mail to Infocollects.Resource@nrc.gov, and to the Desk Officer, Office of Information and Regulatory Affairs, NEOB-10202, (3150-0104), Office of Management and Budget, Washington, DC 20503. If a means used to impose an information collection does not display a currently valid OMB control number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.
PLANT CONDITIONS PRIOR TO THE EVENT
At the time of the event, Grand Gulf Nuclear Station (GGNS) Unit 1 was in Mode 2 and raising power in the source range to return to power operations. No other safety systems were inoperable at the time of this event.
DESCRIPTION
At 1808 hours0.0209 days <br />0.502 hours <br />0.00299 weeks <br />6.87944e-4 months <br /> on 1/27/17, the Main Control Room received "HPCS PMP SUCT PRESS ABNORMAL" (1 H13-P601-16A- D4) annunciator due to a High Pressure Core Spray (HPCS) Jockey Pump trip. The Control Room dispatched an operator and electrician to HPCS jockey pump breaker 52-170105 and dispatched an operator locally to the HPCS jockey pump. The operator reported the HPCS breaker to be in the ON position with no abnormalities noted. The local operator reported the HPCS Jockey Pump not running but no other abnormalities were identified. At 1817 hours0.021 days <br />0.505 hours <br />0.003 weeks <br />6.913685e-4 months <br /> "HPCS JKY PMP DISCH PRESS LO" annunciator alarmed and "HPCS PMP SUCT PRESS ABNORMAL" annunciator cleared. HPCS pump suction pressure indicated 23.75 psig on Main Control Room Panel 1 H13-P625. Average suction pressure over the last five years is 21.3 psig.
The LCO Action Statement entered was LCO 3.5.1.B, ECCS Operating- for HPCS System inoperable.
Initial investigation of the feeder breaker (52-170105) revealed that the overloads at the breaker were tripped. The motor amperage was measured at 53 amps during a 13 second run in which the pump did not rotate. The thermals tripped again. The decision was made to disassemble the HPCS Jockey Pump and rebuild the pump using parts from the warehouse which was performed on 1/29/17. During disassembly of the pump, the following conditions were identified:
- A groove in the bearing housing The pump was tested to demonstrate functionality of the pump on 1/29/17 and the system was returned to service.
REPORTABILITY
Event Notification No. 52516 was made to the U.S. Nuclear Regulatory Commission (NRC) Operations Center. This LER is being submitted pursuant to Title 10 Code of Federal Regulations 10 CFR 50.73(a)(2)(v)(D) for any event or condition that could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident. Telephonic notification was made to the NRC Operations Center via the Emergency Notification System on 1/27/17, at 2305 hours0.0267 days <br />0.64 hours <br />0.00381 weeks <br />8.770525e-4 months <br />, pursuant to 10 CFR 50.72(b)(3)(v)(D) for any event or condition that could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident.
CAUSE
Direct Cause: The HPCS Jockey Pump failed on 1/27/17 due to the thrust bearing being degraded causing the pump to seize.
Apparent Cause: It was identified that the HPCS Jockey Pump (Gould 3196) does not have a time-based replacement Reported lessons learned are incorporated into the licensing process and fed back to industry.
Send comments regarding burden estimate to the FOIA, Privacy and Information Collections Branch (T-5 F53), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by e-mail to Infocollects.Resource@nrc.gov, and to the Desk Officer, Office of Information and Regulatory Affairs, NEOB-10202, (3150-0104), Office of Management and Budget, Washington, DC 20503. If a means used to impose an information collection does not display a currently valid OMB control number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.
Grand Gulf Nuclear Station, Unit 1 05000-416 maintenance task. GGNS implements a predictive monitoring maintenance strategy in lieu of time-based replacement preventive maintenance tasks. The failure of the thrust bearing would have shown up in the axial vibration trends of the pump. Current preventive maintenance was not sufficient to prevent failure of the jockey pump. A conservative time- based replacement PM task to replace the pump will reduce the likelihood of another failure of the pump.
Contributing Cause: The HPCS operating instructions does not contain enough guidance to maintain the HPCS System available when the jockey pump is secured. The inadequate guidance does not cause the jockey pump to fail, but increases the consequences (non-functional time) of the event. The HPCS System can be made operable by keeping the HPCS Pump discharge line full by either the HPCS Jockey Pump or by running the HPCS Pump. During this failure, the procedural guidance did not allow for the HPCS Pump to be run to keep the HPCS System operable.
EXTENT OF CONDITION
The condition may exist in the following equipment, procedures, processes, and/or organizations:
- No procedures are affected
- No processes are affected
- No organizations are affected
EXTENT OF CAUSE
The cause may exist in the following equipment, procedures, processes, and/or organizations:
- RHR Jockey Pumps A, B, and C
- No procedures are affected
- No processes are affected
- No organizations are affected
CORRECTIVE ACTIONS
The HPCS Jockey Pump was rebuilt and a partial HPCS Quarterly Functional Surveillance was performed to demonstrate functionality of the pump. This partial surveillance was completed satisfactorily on 1/29/17 and the pump was returned to service.
To prevent this failure from occurring in the future, the following actions have been taken:
- Initiated preventive maintenance task to perform thermography and oil analysis of the HPCS Jockey Pump bearings.
- Initiated preventive maintenance tasks to perform thermography and oil analysis of all three RHR Jockey Pump bearings.
- Initiated preventive maintenance task to perform thermography and oil analysis of the LPCS Jockey Pump bearings.
Reported lessons learned are incorporated into the licensing process and fed back to industry.
Send comments regarding burden estimate to the FOIA, Privacy and Information Collections Branch (T-5 F53), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by e-mail to Infocollects.Resource@nrc.gov, and to the Desk Officer, Office of Information and Regulatory Affairs, NEOB-10202, (3150-0104), Office of Management and Budget, Washington, DC 20503. If a means used to impose an information collection does not display a currently valid OMB control number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.
- Initiated preventive maintenance task to replace the HPCS Jockey Pump on a conservative time-based frequency.
- Initiated preventive maintenance task to replace all three RHR Jockey Pumps on a conservative time-based frequency.
- Initiated preventive maintenance task to replace the LPCS Jockey Pump on a conservative time-based frequency.
SAFETY SIGNIFICANCE
The event posed no threat to the health and safety of the general public or to nuclear safety as safety-systems performed as designed. No Technical Specification safety limits were violated. Industrial safety was not challenged, and there was no potential or actual radiological release during the event.
PREVIOUS SIMILAR EVENTS
There are no known previous similar events at Grand Gulf Nuclear Station.
