TXX-6751, Final Deficiency Rept CP-86-73 Re Installation of ASME Snubber Attachment Brackets.Initially Reported on 870320.Min c-c Dimensions for Size 3 & 10 Snubber Forwards Brackets & Spec 2323-MS-100 Revised
| ML20234E362 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 09/18/1987 |
| From: | Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-86-73, TXX-6751, NUDOCS 8709220363 | |
| Download: ML20234E362 (2) | |
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H Log # TXX-6751.
l-File # 10110 903.9
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Ref # 10CFR50.55(e) nlELECTRIC September 18, 1987 William G. Counsil Executive Vice President U.
S.- Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION I
DOCKET NOS. 50-445 AND 50-446 ASME SNUBBER ATTACHMENT BRACKETS SDAR: CP-86-73 (FINAL REPORT)
Gentlemen:
By letter logged TXX-6315, dated March 20, 1987, we notified you of a deficiency involving installation of ASME snubber attachment brackets, which we determined to be reportable under the provisions of 10CFR50.55(e).
Our last interim reports were logged TXX-6497, dated June 12, 1987, and TXX-6315 i
dated March 20, 1987. These two interim reports provided specific details of 1
- this deficiency but did not provide a description of all program changes initiated to preclude recurrence of the deficiency.
Program changes not i
previously provided are summarized below.
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Our evaluation of project procedures has been completed. As a result of this evaluation, the minimum "c-c" dimensions (centerline-to-centerline distance between the forward and rear mounting brackets pins) for size 3 and size 10 snubber forward brackets have been revised. Also, Project Specification 2323-MS-100, " Field Fabrication and Erection of Piping and Pipe Supports", has 1
been revised to require inspection of size 10 snubbers during installation to l
assure an adequate swing angle cone. The above changes have also been incorporated into pipe support construction procedures CP-CPM-9.10A,
" Installation of Vendor Supplied Component Support Catalog Items" and ACP-11.5, " Component Support Fabrication".
In addition, inspection criteria have been revised in procedures AQP-11.3, " Fabrication / Installation Inspections of Component Supports", AQP-11.5, "ASME Component Installation Verification", QI-QAP-11.1-28, " Fabrication / Installation Inspections of ASME Component Supports, Class' 1, 2, and 3", and CP-QAP-12.1, " Mechanical Component Installation Verification, N-5 Certification".
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1 TXX-6751, Septemb'ee 18, 1987'
'Page 2 of 2 As previously reported, the 31 supports requiring rework will be completed by January 26, 1988. No further corrective action is required for this issue.
' Supporting documentation will be available onsite for review after February 12, 1988.
4 Very truly yours, f
I'N W. G. Counsil BSD:tgj c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3) 4 I
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