ML20043F972
| ML20043F972 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 06/11/1990 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Tucker H DUKE POWER CO. |
| Shared Package | |
| ML20043F973 | List: |
| References | |
| NUDOCS 9006180375 | |
| Download: ML20043F972 (5) | |
See also: IR 05000413/1990200
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION
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JUN 11 1990
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Docket Nos.:
50-413
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and 50-414
Mr. H. B. Tucker, Vice President
Nuclear Production Department
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Duke Power Company
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P.O. Box 1007
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Charlotte, North Carolina 28201-1007
Dear Mr. Tucker:
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SUBJECT:
INTERFACINGSYSTEMLOCAINSPECTION(50-413/90-200AND50-414/90-200)
This letter forwards the report on the interfacing system loss-of-coolant
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(ISLOCA) inspection performed by an NRC team during the period from April 16
through April 27, 1990 at the Catawba Nuclear Power Station.
The inspection
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was conducted by members of the Office of Nuclear Reactor Regulation,
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-Region II, and NRC contractors.
At the conclusion of the inspection, we
discussed the findings with members of your staff identified in the enclosed
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inspection report.
The primary objective of this inspection was to evaluate specific plant design
features, systems, equipment, procedures, operation activities, and human
actions which could affect the initiation or progress of an ISLOCA. This
included identification of generic events or system features related to
ISLOCAs, potential initiating or precursor events, as well as potential human
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performance and human errors.
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The team found that, in general, the interfacing systems at Catawba Nuclear
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Power Station were adequately maintained and tested to prevent gross-failure of
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pressure isolation valves which could initiate an ISLOCA event. Additionally,
the team did not identify any significant deficiencies in the area of-
man-machine interface which could significantly increase the probability of an
operator error initiating an ISLOCA event. However, the inspection team had
additional specific findings in the areas of: (1) operators recognition of
ISLOCA phenomenon;-(2) available alarms which were available to warn the
operators of an ISLOCA; and (3) procedures used for remote shutdown which had
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incomplete or missing caution statements indicating that the interlocks for the
decay heat removal system were bypassed.
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Although not addressed in the report, on June 11, 1990, failure to follow
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procedures led to valve misalignment which resulted in an ISLOCA precursor
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event. The event, along with other items, will be discussed between Duke Power
and NRC in a meeting scheduled for June 18, 1990.
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JUN 1 1 1990
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Mr. H. B. Tucker'
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In accordance with 10 CFR 2.790(a), a copy of this letter and the enclosure
will be placed in the NRC Public Document Room.
Should you have any questions concerning this inspection, we will be pleased to
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discuss them with you.
Sin erely,
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Division of Reactor Pro cts 1/11.
~ Office of Nuclear React
Regulation
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Enclosure:
NRC Inspection Report 50-413/90-200
and 50-414/90-200
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cc w/ enclosures:
See page 3
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Mr. H. B. Tucker.
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In accordance'with 10 CFR 2.790(a), a copy of this letter and the enclosure
, ill-be'placed in the NRC Public Document Room.
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Should you have ary questions concernin9 this inspection, we will be pleased to
discuss them with you.
Sincerely,
,
Original signed by
.
Steven A. Varga, Director
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Division of Reactor' Projects 1/11
Office of Nuclear Reactor Regulation
Enclosure:
NRC Inspection Report 50-413/90-200
and 50-414/90-200
cc w/ enclosures: See page'3
' Distribution: See-page 4
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Mr. H. B. Tucker
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Duke Pwer Company
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cc w/ enclosures:
A.V. Carr, Esq.
North Carolina Electric Membership
-Duke Power Company
Corp.
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422 South Church Street
3400 Sumner Boulevard
Charlotte, North Carolina 26242
P.O. Box 27306
Raleigh, North Carolina 27611
J. Michael McGarry, III, Esq.
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Bishop, Cook, Purcell and Reynolds
Saluda River Electric Cooperative,
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1400 L Street, N.W.
Inc.
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Washington, D. C.
20005
P.O. Box 929
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Laurens, South Carolina 29360
North Carolina NFA-1
Senior Resident inspector
Suite 600
Route 2, Box 179N
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3100 Smoketree Ct.
York, South Carolina 29745
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P.O. Lox 29513
Raleigh, North Carolina 27626-0513
Regional Acministrator, Region 11
U.S. Nuclear Regulatory Connissicn
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Ms. S. S. Kilborn
101 Marietta Street, NW, Suite 2900
Area Manager, Mid-South Area
Atlanta, Georgia 30323
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ESSD Projects
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Westinghouse Electric Corp.
Mr. Heyward G. Shealy, Chief
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MNC West Tower - Bey 239
Bureau of Raciological Health
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P.O. Eox 355
South Carolina Departnent of Health
Pittsburgh, Pennsylvania 15230
and Environmental Control
2600 Bull Street
County Manager of York County
Colunbia, South Carolina 29201
York County Courthouse
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York, South Carolina 29745
Ms. Karen E. Long
Assistant Attorney General
,
Richard P. Wilson, Esq.
N.C. Department of Justice
Assistant Attorney General
P.O. Box 629
S.C. Attorney General's Ohice
Raleigh, North Carolina 27602
P.O. Box 11549
Colunibia, South Carolina 29211
Mr. Robert G. Morgan
Nuclear Production Department
Piedinont Municipal Power Agency
Duke Power Company
121 V111 ate Drive
P.O. Box 33189
Greer, South Carolina 29651
Charlotte, North Carolina 26241
Mr. Alan R. Herat, Chief
Project Branch #3
U.S. Nuclear Regulatory Commission
101 Marietta Street, NW, Suite 2900
Atlanta, Georgia 30323
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Distribution-
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WDLanning, NRR
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SVAthavale, NRR
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KNJabbour, NRR
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DBMatthews, NRR.
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RJBarrett, NRR
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JEDyer, ED0-
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WT0rders,-SRI Catawba
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- Regional Administrators
Regional Division Directors
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Inspection Team
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