TXX-6360, Interim Deficiency Rept CP-84-12 Re Impact of High Energy Line Break Temps on Qualified Equipment Outside Containment. Initially Reported on 840604.Deficiency Under Evaluation. Next Rept Will Be Submitted by 870528
| ML20205J413 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 03/27/1987 |
| From: | Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| CP-84-12, TXX-6360, NUDOCS 8704010305 | |
| Download: ML20205J413 (2) | |
Text
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Log # TXX-6360
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903.11
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Ref. # 10CFR50.55(e) lilELECTRIC March 27, 1987 m,u m, Esemans Vi<w Presiden U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKETS NOS. 50-445 AND 50-446 IMPACT OF HELB TEMPERATURES ON QUALIFIED EQUIPMENT OUTSIDE CONTAINMENT SDAR:
CP-84-12 (INTERIM REPORT)
Gentlemen:
On June 4,1984, we verbally notified your Mr. D. Hunnicutt of a deficiency involving the environmental qualification of equipment outside containment for high energy line breaks (HELB). This is an interim report of a potentially reportable item under provisions of 10CFR50.55(e). Our latest interim report, logged TXX-6179, was submitted on December 18, 1986.
The evaluation of cable temperatures in the area of concern is continuing. A preliminary analysis has indicated that the cable sheath temperatures in the main steam penetration area exceed the temperature to which the cables were qualified.
Currently, engineering has identified all affected essential cables in the area of concern. An analysis of the elevated temperature effects on those cables, which includes consideration of raceway size and the insulating effect of any fire barrier material, is in progress. The results of this analysis, currently scheduled for completion by April 30, 1987, are required to determine the impact of this issue upon the safety of plant operations.
We will submit our next report on this issue no later than May 28, 1987.
Very truly yours, MU W. G. Counsil BSD/amb c - Mr. E. H. Johnson, Region IV Mr. D. L. Kelley, RI - Region IV Mr. H. S. Phillips, RI - Region IV q
d 8704010305 070327
/Y PDH ADOCK 05000445 f
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4tU North Olne Street i.it Ml I)allas, lesas 75201
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M. D. Spence
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