ML19332D950
| ML19332D950 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 11/29/1989 |
| From: | William Cahill TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| CP-89-031, CP-89-31, TXX-89822, NUDOCS 8912060070 | |
| Download: ML19332D950 (2) | |
Text
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-Log #.TXX-89822'
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Ref. # 10CFR50.55(e) ~
RIELECTRIC m
November 29', 1989 L
4 h;p W. J. Cablit
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Executive Vice President ;
~U. S. Nuclear Regulatory Commission-Attn: Document Control Desk ji
' Washington, D. C.
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SUBJECT:
. COMANCHE' PEAK STEAM ELECTRIC' STATION (CPSES)
- DOCKET NOS. 50-445 AND 50-446
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~TORNAD0'0AMPERS~
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SDAR:
CP-89-031 (FINAL REPORT, UNIT 1) b
.(INTERIM REPORT, UNIT 2).
.4 p
r Gentlemen:
- 0n 0ctober 30,.1989, TV' Electric verbally notified the.NRC of. a deficiency linvolving1 tornado dampers..;After further evaluation, it has been determined
~that this-issue is not reportable for Unit I under the provisions of-
-10CFR50.55(e).
fSpecifically, nonconformance reports (NCR's) identified. two Unit I tornado dampers which could not travel.to the design full open position due to interference.from'thermolag installed on ' adjacent' fire dampers.
A walkdown of the remaining-Unit litornado dampers instrilled in tandem with fire dampers revealed one additional tornado damper whose travel was restricted.due to thermolag on the_ adjacent fire damper..An additional NCR was issued for this damper.
L A calculation of the Unit I tornado venting analysis utilizing the restricted positions of.these three tornado dampers. indicated that the change in'the m
. calculated-differential. pressures due to the as-found Unit I tornado damper
.{
louver blade positions is not significant.
Based on the results of this calculation, it was concluded that no adverse effect to the safe operation of Unit I would have resulted from this deficiency.
8912060070 891129 PDR ADOCK0500g5 p;!i s
400 North Olive Street LB81 Dallas, Texas 73201 l:
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I TXX-89822 November 29, 1989 Page 2 of 2 Upon resumption of the balance of' Unit 2 engineering activities, Unit 2 tornado dampers will be inspected to determine if a similar condition exists for Unit 2. - The next report discussing the results of the Unit 2 evaluation will be submitted' prior to Unit 2 fuel load.
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Sincerely, o
V t
w dess4 William J. C hill, Jr.
CBC/smp l.
c --Mr. R. D. Martin, Region IV l-Resident Inspectors, CPSES (3) l
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