ML20084M608
| ML20084M608 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 04/25/1984 |
| From: | Farrar D COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20084M605 | List: |
| References | |
| 8426N, NUDOCS 8405150434 | |
| Download: ML20084M608 (3) | |
Text
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'4'.
- '. / ? ) one First National Plaza. Chicago. Illinois
\\ Commonwe:lth Edison k
O' Address Reply to. Post Office Box 767 f
\\,
Chicago. Illinois 60690 April 25, 1984 i
i Mr. James G. Keppler Regional Administrator U.S. Nuclear Regulatory Commission l
799 Roosevelt Road - Region III i
Glen Ellyn, IL 60137 j
Subject:
Byron Generating Station Units 1 and 2
[
I&E Inspection Report Nos. 50-454/84-09 j
and 50-455/84-07 Reference (a):
March 19, 1984 letter from W. S. Little to Cordell Reed.
Dear Mr. Keppler:
Reference (a) provided the results of an inspection report i
at Byron Station by Mr. R. S. Love on January 23-27, 1984.
During l
that inspection certain activities were found to be not in compliance with NRC regulations.
Attachment A to this letter contains Commonwealth Edison's response to the Notice of Violation which was appended to reference (a).
Please address further questions regarding this matter to this office.
Very ruly your
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D. F.
Farrar Director of Nuclear Licensing Im Attachment A
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h APR 2 71984 8426N 8405150434 840507
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PDR ADOCK 05000454 G
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ATTACHMENT A Response to Notice of Violation Violation 10 CFR 50, Appendix B, Criterion XVI, as implemented by CECO Topical Report CE-1-A, Section 16, requires that measures be established to assure that conditions adverse to quality are promptly identified and corrected.
Contrary to the above, the failure of Hatfield Electric Company to provide an adequate response to DR 3382 has resulted in 12 safety-related electrical cables being installed in Byron Station, Unit 1, whose qulaity is indeterminate in that one or more of these cables was overstressed during the attempted pull-back of cable IVA709.
Corrective Action Taken and Results Achieved All thirteen safety-related cables in conduit COA 7464 are being replaced.
Contractor discrepancy reports for all other cables which were pulled out of conduit have been reviewed to confirm that this was an isolated incident.
Corrective Action Taken to Avoid Further Noncompliance As described in Section 3.C of the inspection report, the possible overstressing of the twelve safety-related cables was not evaluated because insufficient information was the basis for disposition of Discrepancy Report DR 3382.
Commonwealth Edison has addressed the circumstances and events pertaining to this item of noncompliance in a letter to the contractor dated February 2, 1984. This letter emphasized the need for all personnel to clearly define problems so that when they are evaluated, the proper disposition can be given.
This letter also re-emphasized that cables should never be pulled unless the cable pulling crew and the QC personnel know what the allowable pulling tension is for the cable pull to be performed.
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,.c Additionally, when cables are to be pulled out of conduit, the allowable pulling tension should be the lesser of the two following tensions:
1.
The calculated maximum pulling tension of the cable (or group of cables) being pulled out; or 2.
The calculated maximum pulling tension of the single smallest size cable remaining in the conduit.
By utilizing the lesser of these two tensions, we can reasonably be assured that any cables remaining in the conduit will not be overtensioned.
Date When Full Compliance Will Be Achieved
~The cables will be replaced by April 30, 1984.
Training ses-sions were held with cable pulling crews on February 29, 1984 and March 7, 1984.
t 8426N i
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