ML20081H193
| ML20081H193 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 10/12/1983 |
| From: | Tucker H DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML20081H171 | List: |
| References | |
| NUDOCS 8311070344 | |
| Download: ML20081H193 (3) | |
Text
e DUKE POWER GOMPANY.l ! $ f j f": i', V~.
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P.O. BOK 33189 CHARLOTTE, N.C. 28242 HALH. TUCKER res.zenown m E."[ C "
October 12, 1983 03 0 Ci I8 A10 : 3 8 ""'~"'
Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303 Re: RII:MDH 50-413/83-21 50-414/83-22
Dear Mr. O'Reilly:
Please find attached a response to Violation No. 413/83-21-01 as identified in the above referenced inspection report. Duke Power Company does not consider any information contained in this inspection report to be proprietary.
Very truly yours,
( &8u e
Hal B. Tucker RWO/php Attachment cc: NRC Resident Inspector Catawba Nuclear Station Mr. Robert Guild, Esq.
Attorney-at-Law P. O. Box 12097 Charleston, South Carolina 29412 Palmetto Alliance 21351s Devine Street Columbia, South Carolina 29205 8311070344 831021 PDR ADOCK 05000413 G
JP0/HBT/RWO October 12, 1983 Duke Power Company Catawba Nuclear Station Violation:
10 CFR 50, Appendix B, Criterion V as implemented by QA Topical Report (Duke 1A) Section 17.1.5.2 requires that activities affecting quality be accomplished in accordance with prescribed instructions, procedures or drawings. Catawba Nuclear Station Specification No. 1390.01-00-0022, Guide for cable' Installation - Cable Tray and Electray Systems requires that the maximum unsupported lengths that cables can run is 96 inches when in a bundle of 3 inches diameter or greater and the cable bend radii minimum shall be 8 times the cable 0.D. for interlocked armor cables.
Contrary to the above, a.
cables running from trays 12038 and 12041 to tray 12652 and cables from tray 12660 to tray 12052 exceed the maximum unsupported length, b.
cables entering tray 12023 violate the minimum specified cable bend radius.
cables exiting tray 4527 are partially supported by a safety related c.
conduit.
Response
1.
Duke Power Company admits parts (a) and (b) as stated and part (c) as it applies to separation only.
2.
Part (a) violation was for small diameter cables between trays not being banded into sufficient size for unsupported lengths. The reason for this violation was lack of care to banding cables to existing cable bundles and need for additional supports. Also, QC inspectors are not specifically required to inspect for unsupported lengths during the cable pulling route check.
The reason for the part (b) violation is that the tray section over the motor control centers was installed at an elevation which limits the space available for cable bending radius. Cables pulled from the tray had a bending radius shortened to a questionable angle due to limited space and limited area to install cable connectors. Cables were installed before templates were used to check cable angles.
The part (c) violation addresses cables in contact with a safety related conduit but not supported by the conduit. The reason for the separation violation is that the designed conduit was routed through an area where cable runs between trays and there was no spacing allowed between the conduit and the bending radius area of the cables.
JP0/HBT/RWO October 12, 1983 3.
Nonconforming Item Nos. 17073, 17074, and 17076 were written to correct the specific problems. Additional tray supports will be added to provide places to attach and support cables in the unsupported bundles and to provide for separation away from the safety related conduit. To assist in obtaining better bending radius, the use of 45-degree cable connectors into the motor control centers is being considered.
4.
Craft will be retrained in the cable installation specification. The QC inspection criteria for cable pulling will be revised to clarify inspection of cable bending radius and unsupported length during the routing of the cable, and the QC inspectors will be trained in this revision.
5.
Full compliance of this item will be achieved by February 6, 1984.