ML20127A711
| ML20127A711 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 01/08/1993 |
| From: | William Cahill, John Marshall TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TXX-93006, NUDOCS 9301120047 | |
| Download: ML20127A711 (2) | |
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r dN Log # TXX-93006 File # 10010 916 35[
333 Ref # 10CFR50.55a TUELECTRIC January 8, 1993 William J. CaMil, Jr.
Gn.up Via hwdar U. S. Nuclear Regulatory Commission Attentinn:
Document Control Desk Washington, DC 20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES) - UNIT 1 DOCKET NO. 50-445 SPECIAL REPORT ON THE UNIT 1. SECOND REFUELING OUTAGE, STEAM GENERATOR INSERVICE INSPECTION TUBE PLUGGING AND
SUMMARY
REPORT Gentlemen:
This le'ter provides the Inservice Inspection (ISI) Special Report on the steam generator tube ISI for Comanche Peak Steam Electric Station's second refueling outage.
This report is being provided to you pursuant to CPSES Unit 1 Technical Specifications 4.0.6.Sa, 4.0.6.5b and 6.9.2.
Full length examinations of 3885 steam generator tubes were performed using multi-frequency bobbin coil techniques.
This represents 21.2% of the active (non-plugged) tubes in the four steam generators.
This sample included 7.8%
of all expanded tubes, as well as all tubes with previously detected indications, in compliance with Technical Specifications 4.0.6.2 and 4.0.6.2b respectively.
The following table _ identifies the number of tubes examined, tubes where indications exist and the thru-wall percentage of those indications.
Steam Gent.rator
- Tubes Examined Row / Column /% Thru-Wall i
2 1909 32/16/11 28/19/15 28/19/17 49/34/25
-48/54/10 48/54/16 27/56/11 3/102/11 25/104/21 25/104/32 11/105/11 110082 9301120047 930100 4/
DR ADOCK 0000 5
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-l g-su N. otive street Ln. 81 Dallas. Tens 75:01
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TXX-93006 Page 2 of 2-51eam Generator
-# Tubes Examined ~
Row / Col umn/% Thru-Wall 3
1976 4/2/14 5/32/17 36/32/13-46/33/10 33/34/15 47/50/17 30/52/20
~48/67/19 32/70/10 l
32/70/13-3/105/12 3/108/28 j
l As indicated by the above table, no tubes exceeded the 40% thru wall plugging limit and therefore no' tubes were plugged, a
If there are any questions, please call Mr. Carl Corbin at (214) 812 8859.
Sincerely.
William J. Cahill Jr.
By:d. S. Marshall Generic Licensing Manager CBC/grp c
- Mr. J. L. Milhoan, Region ' !V Resident Inspectors, CPSES (2)
Mr. T. A. Bergman, NRR
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