ML20195H134
| ML20195H134 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 06/22/1988 |
| From: | Miller H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Reed C COMMONWEALTH EDISON CO. |
| Shared Package | |
| ML20195H140 | List: |
| References | |
| NUDOCS 8806280223 | |
| Download: ML20195H134 (2) | |
See also: IR 05000254/1988011
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JUN 2 219B3
Docket No. 50-2E4
Docket No. 50-265
Conmonwealth Edison Company
ATTN: Mr. Cordell Reed
Senior Vice President
Post Office Box 767
Chicago, IL 60690
Gentlemen:
This refer; to the routine safety inspection conducted by Mr. H. A. Walker and
others of this office on April 18-22, May 2-6, 11, 31 and June 1,1988, of
activities at the Quad Cities Nuclear Power Plant, Ur.its 1 and 2, authorized
by Operating Licenses No. OPR-29 and No. DPR-30, and to the discussion of our
findings with Mr. R. Bax and others of your staff at the conclusion of the
inspection.
The purpose of the inspection was to assess the accomplishment
and effectiveness of maintenance activities.
The enclosed copy of our inspection report identifies areas examined during
the inspection. Within these areas, the inspection consisted of a selective
examination of procedures and representative records, observations, and
interviews with personnel.
This inspection and the recent NRC inspection of the High Pressure Core
Injection and Reactor Core Isolation Cooling Systems at the Quad Cities
facility raised substantial concerns about the perforniance of maintenance,
modifications, and the evaluation of problems for root cause.
These concerns
are illustrated by the following:
Installation of a ground in the 1/2 Emergency D'esel Generator (EDG)
auto-start circuitry and subsequent failure to correct this ground
despite an indication that a problem existed during post-modification
testing.
Routinely operating the plant with numerous grounds in the DC electrical
system. Operations in this manner can result in masking faulted
conditions which can prevent safety-related components from performing
their intended safety 'JnCtions,
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Corrective actions after component failures to similar components or
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the same component in the adjacent unit were inadequate.
This was the
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case with the 4KV EDG breaker trip latch mechanism failure that occurred
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in October 1987 and with repeated 480 volt auxiliary electrical contact
failures that had occurred since 1980.
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Inadequate or lack of preventive maintenance on such components as
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motor-operated valves and 4KV horizontal breakers in safety-related
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systems.
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Commonwealth Edison Company
2
JUN 221988
These deficiencies indicate the need for management attention to the
performance of maintenance and modifications.
During this inspection, it
was noted that management had already initiated action plans to improve these
areas.
However, based on the significance of deficiencies identified during
this inspection, the NRC will closely follow your progress in.these areas.
We are releasing the report at this time for your information.
The apparent
violations, described in Paragraphs 3.3.1.1.2 and 3.3.1.1.3 of this report are
being reviewed for potential enforcement action.
An enforcement conference
will be held on June 24, 1988 in the Region III Office with you and other
members of your staff.
You will be notified by separate correspondence of
our decision regarding enforcement action.
No written response is required
until you are notified of the proposed enforcement action.
In accordance with 10 CFR 2.790 of the Commission's regulations, a copy of
this letter, the enclosures, and your response to this letter will be placed
in the NRC Public Document Room.
The responses directed by this letter and the accompanying Notice are not
subject to the clearance procedures of the Office of Management and Budget
as requiret by the Paperwork Reduction Act of 1980, PL 96-511.
We will gladly discuss any questions you have concer
this inspection.
Sincerely.
ORIGINAL SIGNED BY HUBERT J. MILLER
H. J. Miller, Director
Division of Reactor Safety
Enclosure:
Inspection Reports
No. 50-254/88011(DRS); and
No. 50-265/88012(DRS)
cc w/ enclosure:
H. Bliss, Nuclear
Licensing Manager
R. L. Bax, Plant Manager
DCD/DCB (RIDS)
Licensing Fee Management Branch
Resident Inspector, RIII
Richard Hubbard
J. W. McCaffrey, Chief, Public
Utilities Division
J. Lieberman, OE
L. Chandler, OGC
F. Miraglia, NRR
RIII
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