ML16295A285
| ML16295A285 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 08/01/1986 |
| From: | Taylor J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | Tucker H DUKE POWER CO. |
| Shared Package | |
| ML16161A760 | List: |
| References | |
| TAC-61519, TAC-61520, NUDOCS 8608130041 | |
| Download: ML16295A285 (4) | |
See also: IR 05000269/1986016
Text
~pP REG,,
05
UNITED STATES
NUCLEAR REGULATORY COMMISSION
~WASHINGTON,
D. C. 20555
August 1, 196
Docket Nos. 50-269,
50-270
and 50-287
Duke Power Company
ATTN:
Mr. H. B. Tucker, Vice President
Nuclear Production Department
422 South Church Street
Charlotte, North Carolina
28242
Gentlemen:
SUBJECT:
SAFETY SYSTEM FUNCTIONAL INSPECTION REPORT NUMBERS 50-269/86-16,
50-270/86-16, AND 50-287/86-16
This letter forwards the report of the Safety System Functional Inspection
performed by an NRC inspection team over the period May 5 to June 11, 1986,
involving activities authorized by NRC Operating License Numbers DPR-38,
DPR-47, and DPR-55 for the Oconee Nuclear Station. This inspection was
conducted jointly by members of Region II, the Office of Inspection and
Enforcement, and NRC contractors. At the conclusion of the inspection, the
findings were discussed at an exit meeting with you and those members of your
staff identified in the appendix to the enclosed inspection report.
The NRC effort involved an assessment of the operational readiness and
functionality of the emergency feedwater (EFW) system. Particular attention
was directed to the details of modifications and design control, maintenance,
operation, and testing applicable to this system.
This report includes findings that may result in enforcement action, which
would be the subject of subsequent correspondence. The report also addresses
other observations and conclusions made by the inspection team. Section 2
of the report is a summary of the more significant findings. The detailed
findings are presented in Section 3.
The team identified weaknesses regarding the functionality of your EFW system.
These weaknesses included concerns involving the availability of sufficient
water supplies; the ability of the EFW system to function following a seismic
event or a high energy line break; design problems, such as the susceptibility
of EFW pumps to runout and inadequate design of the turbine-driven EFW pump
steam supply; and maintenance problems, such as the use of incorrect greases in
motor-operated valves and repetitive equipment failures. On the other hand,
Oconee was found to have versatile systems for supplying water to steam generators
for post-accident decay heat removal.
This versatility included EFW and main
feed systems with the capability of being cross-connected between the three units
and a separate high pressure feed system with the potential for supplying raw
water to the steam generators of all three units. Notwithstanding this versatil
ity, this inspection identified significant problems to be considered by Duke
ADOCI4 05000269
'0
Duke Power Company
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management. These are summarized in Section 2 of the attached report entitled,
"Summary of Significant Inspection Findings."
We request that you respond to
this office within 60 days describing such actions that you have taken or intend to
take in regard to the weaknesses identified in Sections 2.1 and 2.3 of the
enclosed report.
We recognize that you have either already taken or plan to take corrective
actions relating to several of our concerns, including improving the availability
of the condenser hotwell water supply in Units 2 and 3 to the suction of the
motor-driven EFW pumps and improving your capability to perform a controlled
plant cooldown or steam generator depressurization using the main steam atmos
pheric dump valves.
Please include in your response the actions planned and
the schedule for these improvements.
While planning corrective actions based on the weaknesses identified in the
enclosed report, it is important that you realize that the focus of this
inspection was only on the EFW system. Therefore, consideration should be
given to identifying and correcting similar problems in other safety-related
systems.
Should you have any questions concerning this inspection, we would be
pleased to discuss them with you.
Sincerely,
Ja es M. Taylo
Director
fice of Inspection and Enforcement
Enclosure:
Inspection Report 50-269/86-16,
50-270/86-16, and 50-287/86-16
Duke Power Company
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cc w/enclosure:
Mr. William L. Porter
Duke Power Company
Duke Power Company
P. 0. Box 33189
422 South Church Street
422 South Church Street
Charlotte, North Carolina 28242
Charlotte, North Carolina 28242
J. Michael McGarry, III, Esq.
Mr. Michael S. Tuckman
Bishop, Liberman, Cook, Purcell & Reynolds
Duke Power Company
1200 Seventeenth Street, N.W.
Post Office Box 1439
Washington, D.C. 20036
Seneca, South Carolina 29678
Mr. Robert B. Borsum
Babcock & Wilcox
Nuclear Power Generation Division
Suite 220
7910 Woodmont Avenue
Bethesda, Maryland 20814
Manager, LIS
NUS Corporation
2536 Countryside Boulevard
Clearwater, Florida 33515
Senior Resident Inspector
U.S. Nuclear Regulatory Commission
Route 2, Box 610
Seneca, South Carolina 29678
Regional Administrator
U.S. Nuclear Regulatory Commission
101 Marietta Street, N.W.
Suite 3100
Atlanta, Georgia 30303
Mr. Heyward G. Shealy, Chief
Bureau of Radiological Health
South Carolina Department of Health
and Environmental Control
2600 Bull Street
Columbia, South Carolina 29201
Office of Intergovernmental Relations
116 West Jones Street
Raleigh, North Carolina 27603
Honorable James M. Phinney
County Supervisor of Oconee County
lWalhalla,
South Carolina 29621
Duke Power Company
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DISTRIBUTION:
NRC PDR
Local PDR
ORPB Reading
DI Reading
VStello, EDO.
JMTaylor, IE
HRDenton, NRR
CJHeltemes, AEOD
JGPartlow
RLSpessard
BKGrimes
JAxelrad
ELJordan
TMurley, Region I
JNGrace, Region II
JGKeppler, Region III
RDMartin, Region IV
JBMartin, Region .V
RDWalker, Region II
AFGibson, Region II
VLBrownlee, Region II
O
TPeebles, Region .II
HPastis, NRR
JFStolz, NRR
HRBooher, NRR
All Licensees (Distribution 6P)
Regional Division Directors
OFC :IE:OR B
- IE: RPB
- I
- IE:D
I
- IE
- IE: DI:
NAME :TOMartin
- LJCallan
- P
K e
- RLSpessard
- J
rtlow
- J Ta lor
DATE :7/7,14/86
- 7,/86
- 7Ae'/86
- 7/q /86
.7/c/86
- 7/3 Y86