05000416/LER-2017-001, Regarding High Pressure Core Spray Jockey Pump Trip
| ML17087A135 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 03/28/2017 |
| From: | Nadeau J Entergy Operations |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| GNRO-2017/00016 LER 17-001-00 | |
| Download: ML17087A135 (7) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(ii)(A), Seriously Degraded 10 CFR 50.73(a)(2)(viii)(A) 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition 10 CFR 50.73(a)(2)(viii)(B) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2)(ix)(A) 10 CFR 50.73(a)(2)(iv)(A), System Actuation 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(v)(A), Loss of Safety Function - Shutdown the Reactor 10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat 10 CFR 50.73(a)(2)(i)(A), Completion of TS Shutdown 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(i) |
| 4162017001R00 - NRC Website | |
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~Entergy GNRO-2017/00016 March 28, 2017 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Entergy Operations, Inc.
P.o. Box 756 Port Gibson, MS 39150 James Nadeau Manager, Regulatory Assurance Grand Gulf Nuclear Station Tel. (601) 437-2103
SUBJECT:
Licensee Event Report (LER) 2017-001-00, High Pressure Core Spray Jockey Pump Trip Grand Gulf Nuclear Station, Unit 1 Docket No. 50-416 License No. NPF-29
Dear Sir or Madam:
Attached is Licensee Event Report (LER) 2017-001-00, High Pressure Core Spray Jockey Pump Trip. This report is being submitted in accordance with Title 10 Code of Federal Regulations 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.
This letter contains no new Regulatory Commitments.
If you have any questions or require additional information, please contact James Nadeau at.
(601 )-437-21 03.
Sincerely, JJN/rjfIf$k Attachment: Li~ense~ I;Y~rlt Report (LER) 2017-001-00
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GNRO-2017/00016 Page 2 of 2 cc:
U.S. Nuclear Regulatory Commission ATTN: Mr. Siva Lingam, NRR/DORL (w/2)
Mail Stop OWFN 8 B1 11555 Rockville Pike Rockville, MD 20852-2738 U.S. Nuclear Regulatory Commission ATTN: Mr. Kriss M. Kennedy (w/2)
Regional Administrator, Region IV 1600 East Lamar Boulevard Arlington, TX 76011-4511 U.S. Nuclear Regulatory Commission ATTN: Mr. Kriss M. Kennedy, NRR/DORL (w/2)
Regional Administrator, Region IV 1600 East Lamar Boulevard NRC Senior Resident Inspector Grand Gulf Nuclear Station Port Gibson, MS 39150
Attachment to GNRO 2017/00016 Licensee Event Report (LER) 2017-001-00
++'NRCFORM U.S. NUCLEAR REGULATORY COMMISSION APPROVED BYOMB: NO. 3150-0104 EXPIRES: 10/31/2018 366 Estimated burden per response to comply with this mandatory collection request:
80 hours9.259259e-4 days <br />0.0222 hours <br />1.322751e-4 weeks <br />3.044e-5 months <br />.
(06-2016)
LICENSEE EVENT REPORT (LER)
Reported lessons learned are incorporated into the licensing process and fed back to industry.
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Send comments regarding burden estimate to the
- FOIA, Privacy and Information Collections
. I (SeePage 2forrequired number ofdigits/characters foreach block)
Branch (T-5 F53), U.S.
Nuclear Regulatory Commission, Washington, DC 20555-0001, or bye-mail i
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to Infocoliects.Resource@nrc.gov, and to the Desk Officer, Office of Information and Regulatory
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Affairs, NEOB-10202, (3150-0104), Office of Management and Budget, Washington, DC 20503. If a (See NUREG-1022, R.3 for instruction and guidance for completing this form means used to impose an information collection does not display a currently valid OMB control http://www.nrc.gov/readi ng-rm/doe-eollectio ns/nuregs/staff/sr1022/r3(J number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.
- 1. FACILITY NAME
- 12. DOCKET NUMBER
- 13. PAGE Grand Gulf Nuclear Station, Unit 1 05000416 1 OF 4
- 4. TITLE Hiah Pressure Core Sorav (HPCS) Jockev Pumo Trio
- 5. EVENT DATE
- 6. LER NUMBER
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED SEQUENTIAL REV FACILITY NAME DOCKET NUMBER MONTH DAY YEAR YEAR NO.
MONTH DAY YEAR N/A 05000 N/A NUMBER FACILITY NAME DOCKET NUMBER 1
27 2017 2017 001 00 3
28 2017 N/A 05000 N/A 9.OPERATING MODE 11.THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTSOF 10 CFR §: (Checkall thatapply) 2 D 20.2201 (b)
D 20.2203(a)(3)(i)
D 50.73(a)(2)(ii)(A)
D 50.73(a)(2)(viii)(A)
D 20.2201 (d)
D 20.2203(a)(3)(ii)
D 50.73(a)(2)(ii)(B)
D 50.73(a)(2)(viii)(B)
D 20.2203(a)(1)
D 20.2203(a)(4)
D 50.73(a)(2)(iii)
D 50.73(a)(2)(ix)(A)
D 20.2203(a)(2)(i)
D 50.36(e)(1 )(i)(A)
D 50.73(a)(2)(iv)(A)
D 50.73(a)(2)(x)
- 10. POWERLEVEL D 20.2203(a)(2)(ii)
D 50.36(e)(1 )(ii)(A)
D 50.73(a)(2)(v)(A)
D 73.71 (a)(4)
D 20.2203(a)(2)(iii)
D 50.36(e)(2)
D 50.73(a)(2)(v)(B)
D 73.71 (a)(5)
Raising power in D 20.2203(a)(2)(iv)
D 50.46(a)(3)(ii)
D 50.73(a)(2)(v)(C)
D 73.77(a)(1) the source range to D 20.2203(a)(2)(v)
D 50.73(a)(2)(i)(A)
~ 50.73(a)(2)(v)(D)
D 73.77(a)(2)(i) return to power D 20.2203(a)(2)(vi)
D 50.73(a)(2)(i)(B)
D 50.73(a)(2)(vii)
D 73.77(a)(2)(ii) operations D 50.73(a)(2)(i)(C)
D OTHER Specify inAbstract below orinNRC Form 366A
- 12. LICENSEE CONTACT FOR THIS LER LICENSEE CONTACT r~LEPHONE NUMBER (Include Area Code)
James Nadeau 1Manager, Regulatory Assurance (601)-437-2103 13.COMPLETE ONE UNE FOR EACH COMPONENT FAILURE DESCRIBEDINTHIS REPORT
CAUSE
SYSTEM COMPONENT MANU-REPORTABLE
CAUSE
SYSTEM COMPONENT MANU-REPORTABLE FACTURER TO EPIX FACTURER TO EPIX N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
- 14. SUPPLEMENTAL REPORT EXPECTED
- 15. EXPECTED MONTH DAY YEAR D YES (If yes, complete 15. EXPECTEDSUBMISSIONDATE)
~
NO SUBMISSION N/A N/A N/A DATE ABSTRACT(Limitto 1400spaces, i.e., approximately 15 single-spaced typewritten lines)
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. B 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.
PLANT CONDITIONS PRIOR TO THE EVENT 2017 001 00 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-
- 04) 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 1H13-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:
Bad thrust bearing 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 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 Jockev Pump (Gould 3196) does not have a time-based replacementPage 2 of 4
U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 (SeeNUREG-1 022, R.3for instruction and guidancefor completing this form http://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1 0221r30(06-2016) l~¥"""''~\\
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..\\....?.i LICENSEE EVENT REPORT (LER)
CONTINUATION SHEET EXPIRES: 10/31/2018 Estimated burden per response to comply with this mandatory collection request: 80 hours9.259259e-4 days <br />0.0222 hours <br />1.322751e-4 weeks <br />3.044e-5 months <br />.
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 (l-5 F53), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or bye-mail to Infocoliects.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.
- 1. FACILITY NAME Grand Gulf Nuclear Station, Unit 1
- 2. DOCKET NUMBER 05000-416
- 3. LERNUMBER YEAR I
SEQUENTIAL I
REV NUMBER NO.
2017 001 00 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:
Residual Heat Removal (RHR) Jockey Pumps A, B, and C Low Pressure Core Spray (LPCS) Jockey Pump 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 LPCS Jockey Pump 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.Page 3 of 4
U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104(06-2016)
LICENSEE EVENT REPORT (LER)
CONTINUATION SHEET (SeeNUREG-1 022, R.3for instruction and guidancefor completing this form http://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1022/r3D EXPIRES: 10/31/2018 Estimated burden per response to comply with this mandatory collection request: 80 hours9.259259e-4 days <br />0.0222 hours <br />1.322751e-4 weeks <br />3.044e-5 months <br />.
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 bye-mail to Infocoliects.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.
- 1. FACILITY NAME Grand Gulf Nuclear Station, Unit 1
- 2. DOCKET NUMBER 05000-416
- 3. LERNUMBER YEAR I
SEQUENTIAL I
REV NUMBER NO.
2017 001 00 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.Page 4 of 4