05000280/LER-2018-002, Regarding Windblown Debris Caused Transformer Fault Resulting in Auto-Start of Emergency Diesel Generator

Regarding Windblown Debris Caused Transformer Fault Resulting in Auto-Start of Emergency Diesel Generator

ML18351A089
Person / Time
Site:	Surry
Issue date:	12/10/2018
From:	Mladen F Virginia Electric & Power Co (VEPCO)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
18-421 LER 2018-002-00
Download: ML18351A089 (4)

LER-2018-002, Regarding Windblown Debris Caused Transformer Fault Resulting in Auto-Start of Emergency Diesel Generator

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)(ix)(A) 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(i)(A), Completion of TS Shutdown 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications
2802018002R00 - NRC Website

text

OEC 1 0 2018 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D. C. 20555-0001

Dear Sir or Madam:

10CFR50.73 Virginia Electric and Power Company Surry Power Station 5570 Hog Island Road Surry, Virginia 23883 Serial No.:

18-421 SPS:

TSC Docket No.: 50-280 License No.: DPR-32 Pursuant to 10CFR50.73, Virginia Electric and Power Company hereby submits the following Licensee Event Report applicable to Surry Power Station Unit 1.

Report No. 50-280 / 2018-002-00 This report has been reviewed by the Station Facility Safety Review Committee and will be forwarded to the Management Safety Review Committee.

Enclosure Commitment contained in this letter: None Very truly yours, F. Mladen Site Vice President Surry Power Station cc:

U.S. Nuclear Regulatory Commission, Region II Marquis One Tower, Suite 1200 245 Peachtree Center Ave., NE Atlanta, GA 30303-1257 NRC Senior Resident Inspector Surry Power Station

NRC. FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY 0MB: NO. 3150-0104 EXPIRES: 03/31/2020 (04-2017) httg://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1022/r3D the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.

3. PAGE Surry Power Station, Unit 1 05000 280 1 OF 3

4. TITLE Windblown Debris Caused Transformer Fault Resulting in Auto-Start of Emergency Diesel Generator

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 MONTH DAY YEAR Surry Power Station, Unit 2

- NUMBER NO.

05000 281 002 FACILITY NAME

. DOCKET NUMBER 10 11 2018 2018 -

00 12 10 2018 05000

9. OPERATING.MODE

11. THIS REPORT IS ~UBMITTED _PURSUANT TO THE REQUIREMENTS OF 10 Ci=R §: (Check ail that apply)

• D ?D-~201 (b)

CJ 20.220~_(~)(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)

N D 20.2203(a)(1>

D 20.2203(a)<4) _

D 50.13(a>(2>cm>

D 50.73(a)(2)(ix)(A).

D 20.2203(a)(2)

D 50.36(c)(1)(i)(A)

[l] 50.73(~)(?)(iv)(A)_

D 50.73(a)(2)(x):

19. POWER L,EVEL

~-... D _20.2203(a)c2)~ii) o* 50.36(f:)(1)(ii)(A)

• D 50.7~(a)(2)(v)(A)

D 73.11(a)(4)

. D 20.220:3(~)(2)(iii).

D 50.36(c)(2)

. D 50.7,3(a)(2)(v)(B).

_ < D.13.11(a>cs>

_ D 20:22~3(a)(2)(iv) *.

D 5o.46(a><3>(ii)

• D 50: 73(a)(2)(v)_(C)

D ~3.11ca)c1) -

~00

. D 20.2203(a)(2)(v) -

.. D 50.73(a)(2)(i)(A)..

D 50:73(a)(2)(v)(D).

D 13.77(a)(2)(i)

_ D 20.?203~a)(~)(vi).

D 50.73(a)(2)(i)(B)

Q ~0.73(a)(2)(vii) o 73.77(a)(2)(ii)

,D 50-73(a)(2)(i)(C)

OoTHER.. Specify in -'.'bstract b~low Of in,

4.0 IMMEDIATE CORRECTIVE ACTIONS

YEAR 2018

• SEQUENTIAL NUMBER 002 REV NO.

00 Roof repairs were made by removing the damaged liner, replacing the insulation sheets, and installing a new EPDM (ethylene propylene diene n:ionomer) roof membrane liners with new anchoring strips and fasteners. New parapet wall flashing was seamed onto new EPDM liner.

5.0 ADDITIONAL CORRECTIVE ACTIONS

Additional periodic inspections will be performed on the turbine building roof until long term corrective actions are completed.

6.0 ACTIONS TO PREVENT RECURRENCE Long term actions recommended by the ca.u_s~ evaluation will be implemented by the corrective action program.

t

7.0 SIMILAR EVENTS

LER 2013-001-00, Bird Contacting Power Lines Results in Emergency Diesel Generator Auto-Start LER 2006-002-00, Spurious Actuation Results in Unit 2 Trip and Loss of Offsite Power 8.0 MANUFACTURER/MODEL NUMBER D831 Dow Corning (J.P. Stevens) Hypalon roofing

9.0 ADDITIONAL INFORMATION

Unit 2 remained at 100 percent power during this event. While #3 EDG was loaded on the 1 J 4160 V emergency bus, Technical Specification (TS) action statements associated with Unit 2 emergency electrical systems were reviewed, and associated TS clocks were entered. The event did not cause any additional reportable condition. All Unit 2 TS action statements associated with Unit 2 emergency electrical systems were exited when the #3 EDG was returned to normal alignment at 22:05 hours on 10/12/2018.

There were no other structures, systems, or components that were inoperable at the start of the event that contributed to the event. Page 3

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