ML20210A480
| ML20210A480 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 01/29/1987 |
| From: | Gautam A, Kopp M, Westberg R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20210A342 | List: |
| References | |
| 50-295-86-30, 50-304-86-30, NUDOCS 8702060481 | |
| Download: ML20210A480 (3) | |
See also: IR 05000295/1986030
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U.S. NUCLEAR REGULATORY COMMISION
REGION III
Reports No. 50o295/86030(DRS); 50-304/86030(DRS)
Dacket Nos. 50-295; 50-304
Licensee: Commonwealth Edison Company
P.O. Boy 767
4
Chicago, IL 60690
Facility Name: Zion Nuclear Power Station, Units 1 and 2
Inspection Corducted: December 30, 1986 through January 14, 1987
Inspectors:
A. S. Gautam
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Approved By: Rolf A. Wes berg, Acting Chief
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Plant Systems Section
Date
Inspection Summary
Inspection on December 30, 1986 through January 14, 1987 (Reports
No. 50-295/66030(DRS); 50-304/86030(DRS))
Areas Inspected: Special announced safety inspection of environmental
qualification concerns regarding unqualified splice / cable assemblies
associated with cubicle cooler fan motors (Modules No. 30703 and No. 25176).
Results: No violations of NRC requirer,ents were identified; however, an
ongoing review is being performed to evaluate one EQ finding in regard to
possible future enforcement action.
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CETAILS
1.
Persons Contacted
Commonwealth Edison Company
+F. Lentine, SNED
- P. LeBlond, Licensing
- M. Lesnet, Technical Staff Engineer
- M. Bailey, Station EQ Coordinator
- Denotes those present during the interim exit meeting on
December 31, 1986.
+ Denotes those present during the exit meeting at the conclusion
of the inspection on January 14, 1987.
2.
Review of Splice /Cablo Assemblies
On December 8, 1986 the licensee notified the Zion NRC resident inspector
of Environmental Qualification (EQ) concerns regarding cubicle cooler
fan motor lead splice / cable assemblies used in 10 CFR 50.49 designated
applications.
These lead assemblies were spliced with various types of
non-EQ tapes and sections of non-EQ PVC cable, and during this review
the licensee confirmed that they could not provide adequate EQ documenta-
tion to qualify these splice / cable assemblies to requirements of
In accordance with the guidance in Generic Letter 85-15,
the NRC inspectors informed the licensee that they were required to
provide a justification for the continued operation (JCO) of Unit 2, as
well as implement appropriate corrective action in Unit 1 prior to its
start up.
a.
Justification for Continued Operation
During this inspection, the NRC inspectors reviewed the licensees
evaluation of the effects of postulated failures of the cubicle
cooler fan mctors on the operability of the plant, and reviewed the
licensee's scheduled corrective action.
Based on their evaluation, the licensee stated that the unqualified
splice / cable assemblies would only be exposed to a harsh radiation
environment during accident conditions in the containment. The
licensee also stated that previous radiation and aging tests
conducted by Wyle Laboratories (Report No. 45307-1, dated
December 23, 1981) and the Electric Power Research Institute
(Report No. NP2129) on PVC cable yielded acceptable results in that
there were no anomalies.
In addition to the above, the licensee
sub_sequently inspected 18 motor lead splice / cable assemblies
in Unit I and found no indication of degradation. The NRC
inspectors informed the licensee that additional inspections were
needed in Unit 2 to further confirm the licensee's evaluation;
however, the inspector's had no immediate concerns regarding the
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operability of the equipment associated with the splice / cable
assemblies in question. The licensee was informed that in
accordance with the guidance in Generic Letter 85-15, enforcement
action may be taken, in that the licensee should have clearly known
that these cable / splice assemblies were unqualified past the
November 30, 1985 EQ deadline.
Pending further review this is a
Potentially Enforceable Unresolved Item.
(50-295/86030-01(DRS);
50-304/86030-01(DRS)).
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b.
Licensee Corrective Action
The licensee has committed to replacing all non-EQ splices and
non-EQ PVC cable used in the Unit 1 cubicle fan motors with
qualified EQ splice / cable assemblies prior to start-up, which
is scheduled for February 15, 1987. The Unit 2 splice / cable
assemblies will be replaced during the upcoming scheduled
maintenance outage in March 1987.
Pending NRC review of licensee
corrective action this is an Open Item (50-295/86030-02(DRS);
50-304/86030-02(DRS)).
3.
Potentially Enforceable / Unresolved Item
An unresolved item is a matter about which more information is required
in order to ascertain whether it is an acceptable item, an open item, a
deviation, or a violation.
Potentially Enforceable / Unresolved Items are
unresolved items, which if ascertained to be a violation will be followed
up with enforcement action in accordance with NRC enforcement guidance on
environmental qualification. A Potentially Enforceable Unresolved Item
is discussed in Paragraph 2a.
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4.
Open Items
Open Items are matters which have been discussed with the licensee, which
will be reviewed further by the inspector, and which involve some action
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on the part of the NRC or licensee or both. An Open Item disclosed
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during this inspection is discussed in Paragraph 2b.
5.
Exit Interview
The Region III inspectors met with the licensee representatives (denoted
under Paragraph 1) during an interim exit on December 31, 1986, and
discussed findings by telephone at the conclusion of the inspection on
January 14, 1987. The inspectors summarized the purpose and findings
of the inspection and the licensee acknowledged this information.
The
licensee did not indentify any documents / processes reviewed during the
inspection as proprietary.
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