ML20212N764
| ML20212N764 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 03/09/1987 |
| From: | Youngblood B Office of Nuclear Reactor Regulation |
| To: | White S TENNESSEE VALLEY AUTHORITY |
| Shared Package | |
| ML20212N766 | List: |
| References | |
| NUDOCS 8703130145 | |
| Download: ML20212N764 (4) | |
Text
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'g USHTED STATES f
g NUCLEAR REGULATORY COMMISSION 3
,s WASHH00 TON, D. C. 20505
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Docket Nos.:
50-327 9 MAR 1987 and 50-328 Mr. S. A. White Manager of Nuclear Power Tennessee Valley Authority 6N 38A Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801
Dear Mr. White:
i-
Subject:
Evaluation of Sequoyah Units 1 and 2 Cable Pulling and Bend Radii Concerns The enclosed Technical Evaluation Report (TER) on cable pulling and cable bend radii concerns for the Sequoyah Nuclear Plant Units 1 and 2 was prepared by the staff's consultants (Franklin Research Center). The TER evaluates TVA guides, procedures and practices for installing Class IE cables to determine if signifi-cant abuse could have occurred to the cables during cable installation. The evaluation discusses significant differences between accepted industry practices and those employed by IVA at Sequoyah Nuclear Plant. The evaluation consisted of review of TVA guides, standards, insoection of worst-case cable / conduit systems and discussion on cable pulling with TVA engineering and installation personnel.
Although no' outright cable damage could be identified during inspection, the evaluation of the Sequoyah cable installation indicated that damage to cables could have occurred from pull-bys, severe bending, jaming and tension through l
90 degree condulets. Long tem random and accident-related common mode failures of cables are possible for the above mentioned types of cable abuse. Conclusions and recomendations are made in the TER for further testing and evaluation of
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cables / conduits to assess whether significant damage has occurred.
l The staff has reviewed the enclosed TER and agrees with its findings, conclu-sions and recomendations. Regarding the implementation of the recomended actions in the TER, the staff recomends that cable tests be conducted for assessing damage associated with pull-bys, jaming, and vertical cable suoported j
by 90 degree condulets at Sequoyah prior to the startup of the plant.
In i
addition, the recomended modifications should be implemented by TVA prior to l
870313014D 070309 PDR ADOCK 05000327 Q
l Mr. S. A. White
- startup. These recommended actions were previously identified in my January 15, 1987 letter to you, and have been the subject of meetings between TVA and the staff on January 29 and March 3,1987. The staff is in the process of evaluating your oroposed responses presented at the March 3, 1987 meeting.
If you have any questions, contact Tom Alexion at (301)492-7386.
Sincerel,
i B. J. Youngblood, Director PWR Project Directorate #4 Division of PWR Licensing-A
Enclosure:
As stated cc: See next page ISTMBUTK Docket File OGC-Bethesda NRC PDR ACRS (10)
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s Mr. S. A. White 2-startup. These recommended actions were previously identified in my January 15, 1987 letter to you, and have been the subject of meetings between TVA and the staff on January 29 and March 3,1987. The staff is in the process of evaluating your proposed responses presented at the March 3,1987 meeting.
If you have any questions, contact Tom Alexion at (301)492-7386.
Sincerely, I
I.J oungb1 od, Director \\
PWR P oject f rectorate #4 Div on of PWR Licensing-A
Enclosure:
As stated cc:
See next page 1
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s Mr. S.A. White Tennessee Valley Authority Sequoyah Nuclear
- Plant cc:
Tennessee Department of Public Regional Administrator, Region II Health U.S. Nuclear Regulatory Comission, ATTN: Director, Bureau of 101 Marietta Street, N.W., Suite 2900 Environmental Health Services Atlanta, Georgia 30323 Cordell Hull Building Nashville, Tennessee 37219 R. W. Cantrell ATTN:
D.L. Williams Mr. Michael H. Mobley, Director Tennessee Valley Authority Division of Radiological Health 400 West Sumit Hill Drive. W12 A12 T.E.R.R.A. Building Knoxville, Tennessee 37902 150 9th Avenue North Nashville, Tennessee 37203 Mr. Bob Faas Westinghouse Electric Corp.
County Judge P.O. Box 355 Hamilton County Courthouse Pittsburgh, Pennsylvania 15230 Chattanooga, Tennessee 37402 R. L. Gridley Tennessee Valley Authority SN 1578 Lookout Place Chattanooga, Tennessee 37402-2801 M. R. Harding Tennessee Valley Authority Sequoyah Nuclear Plant P.O. Box 2000 Soddy Daisy Tennessee 37379 Resident Inspector /Sequoyah NPS c/o U.S. Nuclear Regulatory Comission 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379 H.L. Abercrombie Tennessee Valley Authority Sequoyah Nuclear Plant P.O. Box 2000 Soddy Daisy, Tennessee 37379
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