ML20211N907
| ML20211N907 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 06/25/1986 |
| From: | Ireland R, Norman D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML20211N885 | List: |
| References | |
| 50-482-86-14, IEIN-83-72, IEIN-86-003, IEIN-86-3, NUDOCS 8607110076 | |
| Download: ML20211N907 (7) | |
See also: IR 05000482/1986014
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APPENDIX B
U.S. NUCLEAR REGULATORY COMMISSION
REGION IV
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NRC Inspection Report:
50-482/86-14
License:
Docket:
50-482
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Licensee:
Kansas Gas and Electric Company
P. O. Box 208
,
Wichita, Kansas 67201
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Facility Name: Wolf Creek Generating Station
Inspection At:
Burlington, Kansas
Inspection Conducted: May 12-16, 1986
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Inspector
A 24 m ?~ A
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D. E. Norman, React'or Inspector, Engineering
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Section, Reactor Safety Branch
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Approved:
M2Y M- - ~'- #
4/-P.r/N
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R. E. Ireland, Chief Engineering Section,
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Reactor Safety Branch
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Inspection Summary
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Inspection Conducted May 12-16, 1986 (Report 50-482/86-14)
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Areas Inspected:
Special, announced inspection to determine what wiring is
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installed in Limitorque operators and to review licensee's environmental
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documentation to ensure that qualification of wiring is adequately established.
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The inspection also included a review of the licensee's actions relative to
Information Notices (IN) 83-72 and 86-03.
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Results:
The inspection determined that Limitorque operators, which had
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previously been reported to be qualified by Limitorque or Westinghouse,
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contained internal wiring and/or terminal blocks which could not be shown to be
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qualified-to the requirements of 10 CFR 50.49. The licensee had inspected most
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of the Limitorque operators, and in response to IN 83-72 and IN 86-03 had
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replaced unqualified wiring and terminal blocks in several operators.
However,
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44 operators qualified by the NSSS had apparently not been inspected. Wiring
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8607110076 860708
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ADOCK 05000482
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which appears to be unqualified was found in one of those operators during this
inspection. Also, the licensee had identified several operators with
unidentified wire or terminal blocks, and no apparent corrective action had
been taken to assure that these items were qualified.
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DETAILS
1.
Persons Contacted
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Kansas' Gas and Electric
- C. J. Hoch, Q.A. Technician
W. M. Lindsay, Supervisor, Quality Systems
- M. G. Williams, Superintendent, Reg. and Adm.
N. Hoadley, Lead Engineer, NPE
D. Walsh, Supervisor, Maintenance Services
D. Glogowski, Maintenance Engineer
- C. J. Pendergrass, Licensing Engineer
- K. Petersen, Lead Engineer, Licensing
J. A. Zell, Manager, Nuclear Training
- F. T. Rhodes, Plant Manager
- J. Goode, Licensing Engineer
D. Rich, Superintendent, Maintenance
R. L. Hoyt, Senior Engineering Specialist
J. L. Houghton, Operations Coordinator
- R. M. Grant, Director, Quality
- A. A. Freitag, Manager, NPE
- W. J. Rudolph, Manager, QA
- 0. L. Maynard, Manager, Licensing
- D. R. Prichard, Engineer, NPC
- J. A. Bailey, Director, Engineering and Tech Services
- G. D. Boyer, Superintendent, Technical Support
Bechtel
C. E. Jeniks, Acting Lead, Electrical
NRC
J. E. Gagliardo, Chief, Reactor Projects Branch
- J. E. Cummins, Senior Resident Inspector
- B. L. Bartlett, Resident Inspector
- D. E. Norman, Reactor Inspector
- Denotes those present during exit interview on May 16, 1986.
2.
Purpose
The purpose of this inspection was to identify wiring used in Limitorque
valve operators installed in a harsh environment, to review the licensee's
environmental qualification documentation to ensure that qualification of
wiring was adequately established, and to review the licensee's actions
relative to IN 83-72 and IN 86-03.
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3.
Inspection Summary
a.
Review of Previous Licensee Actions
Approximately 114 Limitorque operators are installed in a harsh
environment at Wolf Creek. Because of reported qualification
problems concerning the operators, the licensee performed inspections
in July 1984, which identified problems in wiring, terminal blocks,
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limit switches and mounting orientation for the operators. During
the licensee's inspection, all 11 operators covered by M-225
specification were found to have unidentified wires. The wires were
subsequently) replaced with qualified ' ires in accordance with Work
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Requests (WR 90306-85 through 90316-85. The operators were model
number SMB with serial numbers ranging from 238481 to 290374.
Unidentified wires were also found in operator KAHV-0030 (S/N 321295,
Spec. No. 231C, Model SMB.) and there was no documentation to show
that the wires were changed or determined to be qualified. This is a
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potential violation of 10 CFR 50.49.
(482/8614-01)
The licensee inspection also revealed that several types of terminal
blocks were being used in Limitorque operators.
In addition to the
terminal blocks, for which qualification data was available (Marathon
300/1600, Buchanan 0222/0524, GE EB-5 and Curtis Type "L"), Kulka
blocks were found and some others were not identif;able. There was
no documentation to show that the unidentified terminal blocks were
changed or determined to be qualified. This is a potential violation
of 10 CFR 50.49.
(482/8614-02.) The Kulka tenninal blocks are
discussed later in this report.
The licensee had also identified unqualified limit switches found
during their inspection. This information will be reviewed by NRC
during a subsequent inspection (open item 482/8614-03).
b.
Hardware Inspection
(1) Sample Selection
The master list of safety-related equipment located in a harsh
environment was reviewed and a sample of 10 operators was
selected to be inspected.
Selection of the sample was based on
the 1ollowing criteria:
(a) operators from several safety
systems, (b) range of Limitorque serial numbers, (c) at least
one operator previously inspected by the licensee, (d) operators
qualified by both Limitorque and the NSSS contractor, and
(e) operators located outside high radiation areas.
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The following operators were included in the sample:
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EMHV-8802A(S/N216087)
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EJHV-8809A (S/N 200677)
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ENHV-0006 (S/N 238482
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LFHV-106
(S/N 256091
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EGHV-127
(S/N260401
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EGHV-061
(S/N 271908
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EFliV-31
(S/N286123)
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EFHV-47
(S/N315153)
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EGHV-133
(S/N321898)
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BGHV-8105 (S/N 247314)
- apparently not inspected by licensee.
(2) Findings
Each operator was inspected to establish the type of internal
wiring. Most longer wires could be identified by wiring
manufacturer markings; however, many short wires did not have
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markings and were identified by visual comparison to previously
identified wires. Nine of the operators had a combination of
Rockbestos Firewall III, Raychem Flamtrol, or Vulkene Supreme
wiring. Most of the wires in operator EJHV-8809A were colored
blue and were marked "Techbestos."
Field wiring which interfaced with the operators was also
inspected. All wires appeared to be of the same type; however,
specific identification could not be made at this interface,
since the jariet material which contained the markings was not
visible.
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c.
Documentation Review
(1) Equipment Qualification Cover Sheet
Each operator specification numba h.s an EQ cover sheet,
Equipment Evaluation Workshent (~E9) and a summary of
qualification details, such ar; 100 . iption of equipment-
qualified, specified and 'quah rleu u,vironment, qualification
method, qualified life, and reports used to establish-
qualification. The description of qualified equipment includes
such items as motor type, and terminal block type. During the
licensee walkdown inspections, certain wiring and terminal
blocks were identified (i.e., Vulkene Supreme wiring and Kukla
terminal blocks) which were neither' discussed nor referenced in
the qualification documentation. Therefore, no trail exists for
making a' determination of the qualification status of these
items. This is an apparent deviation from the EQ program plan
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described in the " Environmental Description of Safety Related
Electrical Equipment" submitted by letter dated January 17,
1986.
(482/8614-04)
(2) Cable Pull Cards
Cable pull cards for field cable interfacing with operators
EMHV-8802A and EGHV-127 were reviewed to establish cable
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identity.
Cables _ identified were Rockbestos 600V control cable,
and Anaconda low voltage power cable.
Qualification of these
cables is reported in test reports E-057-020-03 and
E058-005-030, respectively.
(3) Vendor Qualification Reports
Vendor and/or test lab qualification test reports for wiring and
terminal blocks included in the operators were reviewed.
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following discrepancies were identified as a result of this
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review:
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(a) There was no qualification test report available for G.E.
Vulkene Supreme wire which was installed in some operators.
The basis for qualification was a G.E. Product Data
Pamphlet dated June 30, 1977, which states that the wiring
is qualified to IEEE Stds. 323-74 and 383-74 and which
presents certain qualification data.
The data presented is
stated to be subject to change without notice.
Therefore,
there is no basis for demonstrating qualification of the
Vulkene wiring to the requirements of 10 CFR 50.49.
This.
is a potential violation of110 CFR 50.49.
(482/8614-05)
(b) There was no qualification test report or basis for
determining qualification of Techbestos wire which was
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identified during this inspection.
This failure te
demonstrate qualification is a potential violation of
(482/8614-06)
(c)
It was stated previously in this report that there was no
audit trail for Kulka terminal blocks in the Limitorque
operator qualification documentation, even though these
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terminal blocks had been identified by the licensee.
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basis of qualification of the terminal blocks was stated by
the licensee to be the " Design Qualification Report for
Feedthrough/ Adapters Model assemblies ISP-719," dated
October 4, 1983.
In'this report, Kukla 602 series terminal
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. blocks _were qualified as a part of the electrical
. penetrations.
There was no documentation to show that the
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terminal blocks were' identical to or~ similar to those
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identified in Limitorque operators, nor had an analysis
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been performed to predict qualified life in the operator
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environment.
This failure to demonstrate qualification is
a potential violation of 10 CFR 50.49.
(482/8614-07)
4.
Exit Meeting
An exit meeting was held on May 16, 1986, with the persons identified in
paragraph 1 during which time results of the inspection were discussed.
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