ML20054K028
| ML20054K028 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 06/17/1982 |
| From: | Green H TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| RO-82-2, NUDOCS 8206300314 | |
| Download: ML20054K028 (2) | |
Text
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. h :s TENNESSEE!!VMLEY AUTHORITY re, CHATTAbdb [/
N EE.374ot 1750 Chestnut S&eeti/Tgwer II 0? JUN 25 a g
- SU June 17, 1982 3
Mr. James P. O'Reilly, Director U.S. Nuclear Regulatory Commission 7,
Office of Inspection and Enforcement 1
Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
TENNESSEE VALLEY AUTHORITY - SEQUOYAH NUCLEAR PLANT UNIT 1 - DOCKET NO. 50-327 - FACILITY OPERATING LICENSE DPR-77 SPECIAL REPORT 82-2, REVISION 1 The enclosed special report is a supplement to my letter to you dated April 30, 1982 concerning penetration fire barrier being non-functional for a period in excess of seven days. This report is submitted in accordance with Sequoyah unit 1 Technical Specifications 3.7.12 and 6.9.2.
Very truly yours, TENNESSEE VALLEY AUTHORITY H. J. Green Director of Nuclear Power Enclosure cc (Enclosure):
Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555 Records Center Institute of Nuclear Power Operations 1820 Water Place Atlanta, Georgia 30339 NRC Inspector, Sequoyah 01Ah CUN
[c'y AL b 0206300314 820617 PDR ADOCK 05000 An Equal Opportunity Employer
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SEQUOYMI NUCLEAR PLANT SPECIAL REPORT 82-2, REVISION 1 UNIT 1 Event Description Electrical penetration 721C0420Q000 in the control building cable spreading room was breached for a period greater than seven (7) days.
Four pipe penetrations between the turbine building and auxiliary building -
were breached for a period greater than seven (7) days.
i 4
Probable Cause The cable penetration was breached on 03/26/82 and during cable pulling on 03/29/82 and 03/30/82, the cables became contaminated. Health Physics surveys could not locate the source and required HP personnel be present when cables were being pulled. Due to these unexpected delays, the cable pulling was not complete until 04/02/82 (7th day). Personnel began sealing the penetration immediately, but the resealing was not complete until 04/05/82.
The pipe penetrations were breached on 04/13/82 to install piping for an essential raw cooling water (ERCW) system piping modification. Failure to seal the penetrations within the seven (7) day requirement has been attributed to the cognizant engineer being unaware of the seriousness of sealing the penetrations within time requirements and installation of the forms for sealing the penetrations being delayed due to the alignment of l
the piping in the penetration. The penetrations were rescaled on 04/23/82.
In both cases the proper procedures for breaching fire barrier penetrations were followed (including verification of fire detector operability and establishment of an hourly fire watch as required by the action statement of LCO 3.7.12).
Corrective Actions Foremen, general foremen, and engineers were instructed in the importance of meeting the seven (7) day breaching requirement.
Communication between shifts was also stressed to ensure maximum use of allotted time while penetrations are breached so that time will be available for unseen problems.
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