ML20100P931
| ML20100P931 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 01/30/1992 |
| From: | Joshua Wilson TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9202040114 | |
| Download: ML20100P931 (2) | |
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J L W e,m u:f re < i n,n t a u w January 30, 1992 U.S. Nuclear Regulatory Commission ATTN:
Document Control Desk Washington, D.C. 20555 Gentlemen:
In the Matter of
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Docket Nos. 50-327 Tennessee Valley Authority
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50-328 SEQUOYAH NUCLEAR PLANT (SQN) - COMMITMENT SCHEDULE REVISION FOR NRC UNRESOLVED ITEM (URI) 90-28-02
Reference:
NRC letter to TVA dated Septe:aber 28, 1990, " Notice of Violation (NRC Inspection Report Nos. 50-327/90-28 and 50-328/90-28)"
g In the referenced report, the inspector noted that certain electrical conduits f{
were wrapped with fire barrier materials to meet the 1-hour resistance criteria ot 10 CFR 50 Appendix R.
The material used for the barriers varied; some were wrapped with Thermal System Inst.lation and others were wrapped with KA0 WOOL.
However, the conduits that were wrapped with KA0 WOOL did not have the conduit supports wrapped in a consistent manner, i.e., some were wrapped eighteen inches, some were wrapped four inches, and some were not wrapped.
Nuclear Engineering reviewed the installation of the KA0 WOOL-wrapped conduits and concluded that the lack of wrap on some supports still met the requirements of Appendix R.
However, TVA agreed to enhance the fire protection of the KA0 WOOL-wrapped conduits by wrapping all the supports in a consistent manner and to a uniform height.
The initial schedule was to complete the installation by January 30, 1992.
Changes in outage duration and implementation scope have resulted in delays in field implementation. The projected completion date for the wrapping activity is April 17, 1992.
9202040114 920130 PDR ADOCK 05000327
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-3 U.S. Nuclear Regulatory Commission Page 2 January 30 _1992 If you have any questions concerning this submittal, please telephone M. A. Cooper at (615) 843-8924.
Sincerely.
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. Wilson cct Mr. D. E. LaBarge Project Manager U.S. Nuclear Regulatory Commission One White Flint. North 11555 Rockville Pike Rockville Maryland 20852 NRC Resident Inspector Sequoyah Nuclear Plant 2600-Igou Ferry Road Soddy-Daisy. Tennessee 37379 Mr B. A. Wilson Project Chief U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia'30323 o
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