ML16148A710
| ML16148A710 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 11/27/1992 |
| From: | Ebneter S NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Hampton J DUKE POWER CO. |
| Shared Package | |
| ML16148A711 | List: |
| References | |
| NUDOCS 9212040281 | |
| Download: ML16148A710 (5) | |
See also: IR 05000269/1992026
Text
NOV 27T1992
Docket No. 50-269, 50-270, and 50-287
License No. DPR-38, DPR-47, and DPR-55
Duke Power Company
ATTN: Mr. J. W. Hampton
Vice.President
Oconee Site
P. 0. Box 1439
Seneca, SC 29679
Gentlemen:
SUBJECT:
NRC INSPECTION REPORT NO. 50-269/92-26, 50-270/92-26
AND 50-287/92-26
This refers to the special inspection conducted by the Nuclear Regulatory
Commission (NRC) Augmented Inspection Team (AIT) at your Oconee facility
during the period October 20 - 28, 1992. The inspection included a review of
events on Oconee Unit 2 that led to the October 19, 1992, Loss of Off-site AC
Power. At the conclusion of the inspection, the findings were discussed with
those members of your staff identified in the enclosed report.
The enclosed copy of the AIT report identifies the areas examined during this
inspection. Within these areas, the inspection consisted of selective
examinations of procedures and representative records, interviews with
personnel and observation of activities in progress.
The AIT concluded that the initiating event was caused by a voltage surge from
a battery charger in the 230 kV switching station DC control power system
during maintenance activities. This caused several power circuit breakers in
the switchyard to open causing an isolation of the Red and Yellow Switchyard
Busses and a loss of Off-site AC power. The operator's response and recovery
to this event was complicated by the lack of appropriate procedural guidance
and the overall complexity of various electrical power systems interactions.
A review of the inspection findings is continuing to determine whether the
described activities violate NRC requirements. You will be advised by
separate correspondence of the results of our review on this matter.
In accordance with Section 2.790 of the NRC's "Rules of Practice," Part 2,
Title 10, Code of Federal Regulations, a copy of this letter and its enclosure
will be placed in the NRC Public Document Room.
9212040281 921127
PDR ADOCK 05000269
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NOV 2 7 1992
Duke Power Company
2
Should you have any questions concerning this letter, please contact us.
Sincerely,
Original signed by
Luis A. Reyes/for
Stewart D. Ebneter
Regional Administrator
Enclosure:
NRC Inspection Report
cc w/encl:
M. E. Patrick
Compliance
Duke Power Company
P. 0. Box 1439
Seneca, SC
29679
A. V. Carr, Esq.
422 South Church Street
Charlotte, NC 28242-0001
County Supervisor of
Oconee County
Walhalla, SC
29621
Robert B. Borsum
Babcock and Wilcox Company
Nuclear Power Generation Division
1700.Rockville Pike, Suite 525
Rockville, MD 20852
J. Michael McGarry, III, Esq.
1400 L Street, NW
Washington, D.C.
20005
Office of Intergovernmental Relations
116 West Jones Street
Raleigh, NC 27603
Heyward G. Shealy, Chief
Bureau of Radiological Health
South Carolina Department of Health
and Environmental Control
2600 Bull Street
Columbia, SC
29201
(cc w/encl -
See page 3)
Duke Power Company
3
NOV 2 1992
(cc w/encl cont'd)
Manager, LIS
NUS Corporation
2650 McCormick Drive
Clearwater, FL 34619-1035
R. L. Gill
Nuclear Production Department -
Mail Stop ECO50
Duke Power Company
P. 0. Box 1006
Charlotte, NC 28201-1006
Karen E. Long
Assistant Attorney General
N. C. Department of Justice
P. 0. Box 629
Raleigh, NC 27602
Duke Power Company
4
NOV 2 7 1992
Distribution:
J. M. Taylor, EDO
D. A. Ward, ACRS
K. C. Rogers, OCM
J. R. Curtiss, OCM
F. J. Remick, OCM
E. G. de Planque, OCM
Document Control Desk (OIRM)
B. Grimes, DOEA:NRR
E. Weiss, AEOD
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