TXX-6107, Interim Deficiency Rept CP-86-55 Re Seismic Air Gap Design Adequacy Between Auxiliary & Containment Bldgs.Initially Reported on 860814.Present Air Gap Width Acceptable.Review & Evaluation Continuing.Next Rept to Be Submitted by 870313
| ML20214N107 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 11/21/1986 |
| From: | Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| CP-86-55, TXX-6107, NUDOCS 8612030541 | |
| Download: ML20214N107 (1) | |
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Log # TXX-6107 File 0 10110 903.7 TEXAS UTILITIES GENERATING COMPANY SKYWAY TOWER . 400 NORTH OLIVE STREET. LB. 81. DALLAS. TEXAS 75301 November 21, 1986 E.M".hff.00h Mr. Eric H. Johnson, Director Division of Reactor Safety and Projects U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, TX 76011
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50-445 AND 50-446 SEISMIC AIR GAP DESIGN ADEQUACY SDAR: CP-86-55 (INTERIM REPORT)
Dear Mr. Johnson:
On August 14, 1986, we verbally notified your Mr. I.~Barnes of a eficiency involving the seismic air gap design adequacy between the Auxiliary Building and Units 1 and 2 Containment Buildings. This is an interim report of a potentially reportable item under the provision of 10CFR50.55(e). Our last interim report was logged TXX-5011, dated September 12, 1986.
The specific deficiency involved recent calculations which indicated that a separation gap dimension should be greater than the existing design dimension durir.g extreme high temperature conditions. Using more realistic data, this calculation was refined to demonstrate that the present gap is acceptable.
Review and evaluation of the refined calculations are scheduled for completion by February 20, 1987.
We anticipate submitting our next report no later than March 13,-1987.
Very truly yours, Wb W. ' G'."Counsil -
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JCH/mlh c - NRC Region IV (0 + 1 copy)
Director, Inspection & Enforcement (15 copies)
U. S. Nuclear Regulatory Commission Washington, D.C. 20555 8612030541 861121
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