TXX-7077, Interim Deficiency Rept CP-87-64 Re Potentially Reportable Item Involving Pressure Relieving Capacity of Tornado Venting Devices on Units 1 & 2.Initially Reported on 870824. Analysis Continuing.Next Rept Will Be Submitted by 880202
| ML20237A479 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 12/09/1987 |
| From: | Counsil W, Woodlan D TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-87-64, TXX-7077, NUDOCS 8712150031 | |
| Download: ML20237A479 (1) | |
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Led # TXX-7077
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903.3 Ref. # 10CFR50.55(e) 7UELECTRIC wimm c. coumu December 9, 1987 hecutor Vice Prrudent U. S. Nuclear Regnlatory Commission Attn: Document Control Desk Washington, D. C.
20555
SUBJECT:
COMANCilE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET N05. 50-445 AND 50-446 DESIGN BASIS TURNADO (DBT) ANALYSIS FOR SAFETY RELATED FOUIPMENT SDAR: CP-87-64 (INTERIM REPORT)
Gentlemen:
On August 24, 1987, we verbally notified your Mr. H. S. Phillips of a potentially reportable item involving the pressure relieving capacity of the tornado venting devices on Units 1 and 2.
Specifically, the existing Design Basis Tornado (DBT) analysis does not include suf ficient documentation to shot' conclusively that safety-related equipment can withstand the differential pressures (negative pressure transient) expected during the DBT. Our previous interim report logged TXX-6732, was submit.ted on September 27, 1987.
We are continuing the analysis of the effects of DBTs on safety-related equipment utilizing pressure differential values determined from calculations based cr the as-built design.
We anticipate submitting our next report on this issue no later than February 2,1988.
Very truly yours, S co. W W. G. Counsil k
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~8712150031 871209 PDR ADOCK 05000445 0
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DCD North Ghve Street Lil St Dalle, Texas 75.'01
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