ML20198A074
| ML20198A074 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 12/04/1998 |
| From: | Stetka T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Randolph G UNION ELECTRIC CO. |
| Shared Package | |
| ML20198A079 | List: |
| References | |
| 50-483-98-18, NUDOCS 9812160149 | |
| Download: ML20198A074 (5) | |
See also: IR 05000483/1998018
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION
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REGION IV
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ARUNGroN TEXAS 76011 8064
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December 4, 1998
Garry L. Randolph, Vice President and
Chief Nuclear Officer
Union Electric Company
- P.O. Box 620
Fulton, Missouri 65251
SUBJECT: NRC INSPECTION REPORT 50-483/98-18 AND NOTICE OF VIOLATION
Dear Mr. Randolph:
From Sept 7mber 14 through October 2,1998, a safety system engineering inspection and
inspection of your program to implement 10 CFR 50.59, " Changes, Tests and Experiments,"
wre conducted at your Callaway Plant reactor facility. Following the exit meeting, the results of
these inspections were discussed with Mr. Mark Reidmeyer of your staff. The enclosed report
presents the scope and results of these inspections.
The safety system engineering inspection included an assessment of the capability of the
essential service water system and supporting electrical systems. On the basis of the results of
our completed reviews, we concluded that the essential service water was capable of
performing its safety functions. We also concluded that your engineering program continued to
be good, although two violations were identified relative to maintaining a sound design basis for
your electrical distribution system and operating within the assumptions of your design, The
NRC has concluded that information regarding the reasons for the violations, the cocrective
actions taken and planned to correct the violations and prevent recurrence is already
adequately addressed on the docket in the enclosed report. Therefore, you are not required to
respond to this letter unless the description therein does not accurately reflect your corrective
actions or your position. In that case, or if you choose to provide additionalinformation, you
should follow the instructions specified in the enclosed Notice.
One unresolved item was also identified concerning design changes made to bypass torque
switches, originally installed in safety-related motor-operated valve control circuits to prevent
overtorque, during valve closure. This matter is discussed in Section E1.1.1 of the enclosed
inspection report. We are concerned that your weak link analysis was not performed with the
maximum expected voltage, and as a result, you may not have identified pressure boundary
parts that could be damaged. We are also concerned that you may not have fully evaluated
valves that had safety functions in both the closing and opening direction, particularly those that
are located in high temperature locations during accident conditions. As discussed, during the
exit, we understand that you have committed to perform additional review to confirm the
adequacy of your design in this area.
Appropriate procedural guidance was in place to implement the requirements of 10 CFR 50.59
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and the safety evaluations that were reviewed properly docurnented that no unreviewed safety
questions existed.
9812160149 981204
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ADOCK 05000483
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Union Electric Company
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In accordance with 10 CFR 2.790 of the NRC's " Rules of Practice," a copy of this letter, its
enclosure (s), and your response will be placed in the NRC Public Document Room (PDR).
Should you have any questions concerning this inspection, we will be pleased to discuss them
with you.
Sincerely,
/
M
Thomas F. Stetka
Acting Chief, Engineering Branch
Division of Reactor Safety
Docket No.:
50-483
License No.: NPF-30
Enclosures:
2. NRC Inspection Report
50-483/98-18
cc w/ enclosures:
Professional Nuclear Consulting, Inc.
19041 Raines Drive
Derwood, Maryland 20855
John O'Neill, Esq.
Shaw, Pittman, Potts & Trowbridge
2300 N. Street, N.W.
Washington, D.C. 20037
H. D. Bono, Supervising Engineer
Quality Assurance Regulatory Support
Union Electric Company
P.O. Box 620
Fulton, Missouri 65251
Manager - Electric Department
Missouri Public Service Commission
301 W. High
P.O. Box 360
Jefferson City, Missouri 65102
Ronald A. Kucera, Deputy Director
Department of Natural Resources
P.O. Box 176
Jefferson City, Missoun 65102
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Union Electric Company
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Otto L. Maynard, President and
Chief Executive Officer
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Wolf Creek Nuclear Operating Corporation
P.O. Box 411
Burlington, Kansas 66839
Dan 1. Bolef, President
Kay Drey, Representative
i
Board of Directors Coalition
for the Environment
6267 Delmar Boulevard
Univetsity City, Missouri 63130
Lee Fritz, Presiding Commissioner
Callaway County Court House
10 East Fifth Street
Fulton, Missouri 65151
Alan C. Passwater, Manager
Licensing and Fuels
AmerenUE
One Ameren Plaza
1901 Chouteau Avenue
i
P.O. Box 66149
St. Louis, Missouri 63166-6149
J. V. Laux, Manager
Quality Assurance
LUnion Electric Company
P.O. Box 620
Fulton, Missouri 65251 -
Jerry Uhlmann, Director
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State Emergency Management Agency
P.O. Box 116
Jefferson City, Missouri 65101
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