ML20247P137
| ML20247P137 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 09/18/1989 |
| From: | William Cahill TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TXX-89714, NUDOCS 8909270041 | |
| Download: ML20247P137 (3) | |
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'MM Log # TXX-89714 1
File # 903.8
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r-C 1UELECTRIC w.s. cas:
September 18, 1989 Exnutive ria nesisenz'.
U. S.. Nuclear Regulatory. Commission Attn: Document Control Desk Washington.-D._C. ~20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50-445 and 50-446 l CLARIFICATION OF PREVIOUS RESPONSE TO THE REQUEST' FOR ADDITIONAL INFORMATION ON FSAR-SECTION 3.8 Gentlemen:
On. July 31,1989,[a public meeting was held in Bethesda, Maryland, to discuss the NRC's Request for Additional-Information (RAI) en the amended FSAR Sections 3.7 and 3.8.
TU Electric's letter TXX-89569 dated August 16, 1989,
.ptcvided a response to the RAI' items discussed in the public meeting. During September 6-7. 1989. the NRC conducted'a structural audit at CPSES. As agreed to.during the audit. TU Electric is providing a revised response to RAI items No. 16 and 17A (see enclosure).
If you have any questions regarding this' submittal, please contact Carl Corbin a! (214) 812-8859.
Sincerely, William J. Cahill, Jr.
By..
. S.' Marshall
[ Generic Licensing Manager CBC/cbc Enclosure c_- Mr. R. D. Martin, Region IV DOM Resident Inspectors, CPSES (3)
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^ 8909270041 890918 PDR-ADUCK 05000445 A
FDC 400 North Olive Street LB81 Dallas, Texas 75201
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! Enclosure to TXX-89714 September 18, 1989 Page 1 of 2 RESPONSE TO REVIEW OF AMENDED FSAR SECTION 3.8 16.
Specify the stud welding equipment that did not satisfy the requirements of CC-4543(a)'and justify the basis of its acceptance.
Resp: CC-4543.5(a) stipulates " Studs shall be welded to steel members with automatically timed stud welding equipment connected to a suitable power source." The-licensing change was made to allow the use of manual. welding equipment where the use of automatic h
welding equipment is not feasible due to space limitations during construction or repairs. The welding procedures and welding operators are qualified in accordance with subsection CC-5540 for both methods.
At CPSES the manual arc welding equipment was used for the attachment of, and repair of, anchor studs. A review of the liner contractor's Nonconformance Control Lists, Repair Checklists, and continuing Operator Qualification Records revealed that the use of manual welding equipment was limited to less then one percent of the containment liner studs.
The weld procedure specifications (WPS) listed below were qualified for stud welding (i.e. the full capacity of the anchor is developed) in accordance with CPSES specification 2323-SS-14
" Containment Steel Liner."
l 1.
WPS STUD WELDING (Automatically Timed Stud Weld Method) 2.
WPS STUD WELDING-SMA (Shield Metal Arc Method) 3.
WPS STUD WELDING (PWHT) (Automatically Timed Stud Weld Method) 4.
WPS STUD WELDING (General Welding Procedure l
Specification for the Stud Welding Process) l 1
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7 'o-Enclosure to TXX-8971'4 September 18. 1989' Page 2 of 2
- 17.
Address the.following staff concerns:
A.
How do the [new] analysis results compare with the.old analysis and, jp for the containment, compare them with the test results.
Resp:.The new analysis and the-old analysis'were not compared. The following table was developed per your request, for the comparison
.of the new analysis and the containment's structural acceptance test case.
RADIAL DISPLACEMENTS ELEVATION NEW ANALYSIS TEST RESULTS *
(FEET)
(INCHES)
(INCHES)-
1001.5 0.53 0.34 968.0 0.64 0.48 932.0 0.65 0.49 903.0 0.64 0.60 870.0-0.66 0.58 838.0 0.57 0.49 VERTICAL DISPLACEMENTS ELEVATION NEW ANALYSIS TEST RESULTS *
(FEET)
(INCHES)
(INCHES) 1068.0 0.72 0.34 1058.96 0.64 0.48 1034.25 0.48 0.39 1000.5 0.32 0.30
- Tm average of the measured displacements.
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