05000416/LER-1917-005, Regarding Loss of Safety Function and Control Room Envelope Due to an Open Boundary Door
| ML17250A201 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 09/07/2017 |
| From: | Hawkins G Entergy Operations |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| GNRO-2017/00054 LER 17-005-00 | |
| Download: ML17250A201 (6) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 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)(v), Loss of Safety Function 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) |
| 4161917005R00 - NRC Website | |
text
~Entergy GNRO-2017/00054 September 7,2017 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk 11555 Rockville Pike
'Rockville, MD 20852 Entergy Operations, Inc.
P.O. Box 756 Port Gibson, MS 39150 Gregory G. Hawkins Director Regulatory & Performance Improvement Grand Gulf Nuclear Station
SUBJECT:
Loss of Safety Function and Control Room Envelope Due to an Open Boundary Door Docket No. 50-416 License No. NPF-29
Dear Sir or Madam:
Attached is Licensee Event Report (LER) 2017-005-00, Loss of Safety Function and Control Room Envelope Due to an Open Boundary Door.
This letter contains no new commitments. Should you have any questions or require additional informatio,please contact Douglas Neve, Manager Regulatory Assurance at (601) 437-2103.
Gregory G. Hawkins Director Regulatory and Performance Improvement Grand Gulf Nuclear Station GGH/ram Attachment: Licensee Event Report (LER) 2017-005-00 cc: (See Next Page)
GNRO-2017/00054 Page 2 of 2 cc: with Attachment and Enclosures Mr. John P. Boska, Project Manager Plant Licensing Branch 1-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop 0-8-C2 Washington, DC 20555 Mr. Scott Morris U.S. Nuclear Regulatory Commission Acting Regional Administrator, Region IV 1600 East Lamar Boulevard Arlington, TX 76011-4511 Mr. Siva Lingham U.S. Nuclear Regulatory Commission Mail Stop OWFN 8 B1 Rockville, MD 20852-2738 NRC Senior Resident Inspector Grand Gulf Nuclear Station Port Gibson, MS 39150
Attachment Licensee Event Report (LER) 2017-005-00
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 03/31/2020 (04-2017)
, the NRC may not conduct or
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~o!j form http://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1022/r3/)
- 13. PAGE Grand Gulf Nuclear Station, Unit 1 05000416 1 OF 3
- 4. TITLE Loss of Safety Function and Control Room Envelope Due to an Open Boundary Door
- 5. EVENT DATE
- 6. LER NUMBER
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED I SEQUENTIAL I REV FACILITY NAME DOCKET NUMBER MONTH DAY YEAR YEAR NUMBER NO.
MONTH DAY YEAR N/A 05000 N/A FACILITY NAME DOCKET NUMBER 7
9 2017 2017 - 005 - 00 9
7 2017 N/A 05000 N/A
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check all that apply)
- 9. OPERATING MODE D 20.2201 (b)
D 20.2203(a)(3)(i)
D 50.73(a)(2)(ii)(A)
D 50.73(a)(2)(viii)(A) 1 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(c)(1)(i)(A)
D 50.73(a)(2)(iv)(A)
D 50.73(a)(2)(x)
D 20.2203(a)(2)(ii)
D 50.36(c)(1 )(ii)(A)
D 50.73(a)(2)(v)(A)
D 73.71 (a)(4)
- 10. POWER LEVEL D 20.2203(a)(2)(iii)
D 50.36(c)(2)
D 50.73(a)(2)(v)(B)
D 73.71 (a)(5)
D 20.2203(a)(2)(iv)
D 50.46(a)(3)(ii)
D 50.73(a)(2)(v)(C)
D 73.77(a)(1) 100 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)
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)
D 50.73(a)(2)(i)(C)
D OTHER Specify in Abstract below or in =
05000416 YEAR I
SEQUENTIAL NUMBER 2017 - 005 - 00 I
REV.
NO.
DESCRIPTION
On July 9, 2017, at approximately 2158 hours0.025 days <br />0.599 hours <br />0.00357 weeks <br />8.21119e-4 months <br /> central daylight time a pressure boundary door to the Control Room Envelope [NA] Yfas'left unsecure. The Control Room Envelope was inoperable for approximately one minute, at which time the door was closed. Grand Gulf Nuclear Station personnel identified that a loss of Safety Function occurred due to a breach in the Control Room Envelope resulting in inoperability of both divisions of Standby Fresh Air systems.
REPORTABILITY
This event is being reported under 10CFR50.73(a)(2)(v)(D), as any event or condition that, at the time of discovery, could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident.
CAUSE
The direct cause of the event was that the door was degraded, resulting in the door dragging on the floor such that the automatic door closer would not function properly. The organization failed to understand the nuclear safety consequence associated with the degraded condition and failed to implement a mitigating strategy.
CORRECTIVE ACTIONS
Immediate Corrective Actions:
Upon identification the door was immediately secured and the Control Room Supervisor was notified.
I The event was entered into the Grand Gulf Nuclear Station corrective action program.
Grand Gulf Nuclear Station Security personnel provided immediate coaching to the employee who left the door open.
The support hinge bushing was. replaced, restoring normal door closure.
Corrective Actions To Prevent Recurrence:
Implement a maintenance strategy for doors SZ100C715, Passageway Door; SZ100C708, Corridor Door; SZ100C612, Corridor NO.3 Door; SZ100C516, Corridor Door.
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, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.
NRC FORM (6-2016)
\\
366A U.S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT (LER)
CONTINUATION SHEET (See NUREG-1022, R.3 for instruction and guidance for completing this form http://www,nrc,govlreading-rm/doc-collections/nuregslstaff/sr1022lr3D APPROVED BY OMB: NO. 3150-0104 EXPIRES: 3/31/2020
- 1. FACILITY NAME, Grand Gulf Nuclear Station, Unit 1 NARRATIVE
- 2. DOCKET 05000416 YEAR I
- 3. LER NUMBER SEQUENTIAL NUMBER 2017 - 005 - 00 I
REV.
'NO.
SAFETY SIGNIFICANCE
There were no nuclear safety consequehces or radiological consequences as a result of this event. No Technical Specification Safety Limits were violated.
PREVIOUS SIMILAR OCCURRENCES LER 2015-002 Loss of.Secondary Containment Differential Pressure during Drawdown Testing LER 2015-003 Technical Specification Surveillance on Primary Containment Isolation Valves LER 2016~003 Loss of Secondary Containment Safety' Function During Routine Roof Inspection LER 2016-009 Entry into Mode of Applicability with the OPRM Upscale Settings Incorrectly Set LER 2017-002 Loss of Secondary Containment and Inoperability of the Standby Gas Treatment System The identified licensee event reports were reviewed and it has been determined that the causes and corrective actions for the previously identified events were sufficiently different that they could not have predicted or prevented the occurrence of this event.
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