05000280/LER-2018-001, Loss of 4160 Volt Emergency Bus and Start of Emergency Diesel Generator Due to Opening Emergency Bus Potential Transformer Drawer
| ML18085A156 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 03/19/2018 |
| From: | Mladen F Virginia Electric & Power Co (VEPCO) |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 18-079 LER 2018-001-00 | |
| Download: ML18085A156 (4) | |
| 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) 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) |
| 2802018001R00 - NRC Website | |
text
MAR 1 9 20l8 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.:
18-079 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 I 2018-001-00 This report has been reviewed by the Station Facility Safety Review Committee and will be forwarded to the Management Safety Review Committee for its review.
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) b1tpJl'.!YVffl.nn;;,g_9v/readin9.:[!!!/doc-collections/nuregs/staff/sr1022/r3.fl the NRC may not conduct or sponsor, and a person is not required to respond to, the infonnation collection.
- 3. PAGE Surry Power Station, Unit 1 05000 280 1 OF 3
- 4. TITLE Loss of 4160 Volt Emergency Bus and Start of Emergency Diesel Generator due to Opening Emergency Bus Potential Transformer Drawer
- 5. EVEI\\JT 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 Surry Power Station, Unit 2 281 05000 FACILITY NAME DOCKET NUMBER 01 17 2018 2018 -
001 -
00 03 19 2018 05000
- 9. OPERATING MODE
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REqUIREMENTS OF *IO CFR §: (Check all that apply)
D 20.220*1 (b)
D
- 20.2203(a)(3)(i)
D 50.73(a)(2)(ii)(A)
D 50.73(a)(2)(viii)(A)
- o 20.2201(d)
,*** D ;zci.2203(a'i<3J(H).
- D so.73(a}(2)(ii)(B) *
. ' ~
- D 50.73(a)(2)(Viii)(B)
. N**
D 20.2203(a)(1)
D 20.2203(a)(4) *
.. D so.1~(a)(2)<rni: *
' [J 50'.73(a)(2)(ix)(A)
D 20.2203(a)(2)(i)
- D 50.36(c)(1)(i)(A) l:ZJ so.73(a)(2)(iv)(A) *..
- D 50.73(a)(2)(x) 1'0. POWER LEVEL D 20.2203(a)(2)(ii)
D 50.36(c)(1)(ii)(A)
- o 50.73(a)(2)(v)(A)
D 73.71(a)(4)
I D 20.22o~(a)(2)(rn).
D.so.3a(c)(2)
D 50.73(a)(2)(v)(B)
D 73.71(a)(5)
D 29.2203(a)(2)(iv)
D so.4a(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)
D 50.73(a)(2)(v)(D)
D 13.77(a)(2)(i)
D 20.2203(a)(2)(vi)
D 50.73(a)(2)(i)(B)
D 50.73(a)(2)(vii)
D 13.77(a}(2)(ii)
{'.,i?~I};'.,.tI~ ::;,:}:*0c.:::i,i:,tf f >
D 50.73(a)(2)(i)(C)
D OTHER Specify in Abstract below or in
5.0 ADDITIONAL CORRECTIVE ACTIONS
Expectations concerning potential risk and consequences of entry into electrical enclosures were established, communicated, and documented by Operations management. The associated *electrical industrial safety requirements were included in the communications.
6.0 ACTIONS TO PREVENT RECURRENCE Further training will be conducted for licensed and.non-licensed operators concerning knowledge of bus potential transformer UV circuitry and the impact of opening associated drawers. Also, training will address industrial safety aspects of working near 4 KV equipment.
All corrective actions determined by the apparent cause evaluation will be implemented in accordance with the station corrective action program.
7.0 SIMILAR EVENTS
LER 95-009-00, Personnel Error Results in. Loss of 4160 V Transfer Bus and Start of Emergency Diesel Generators 8.0 MANUFACTURER/MODEL NUMBER G080 I GE JVM-3 bus potential transformer drawer
9.0 ADDITIONAL INFORMATION
Unit 2 remained at 100 percent power during this event. While #3 EDG was loaded on the 1J 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 12:54 hours on 1/17/2018.
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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