ML20106C189
| ML20106C189 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 09/05/1984 |
| From: | Foster D GEORGIA POWER CO. |
| To: | Robert Lewis NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML20106C164 | List: |
| References | |
| GN-412, NUDOCS 8410240047 | |
| Download: ML20106C189 (3) | |
Text
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Georgia Power Company t
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Route 2. Box 299A j Waynesboro, Georgia 30830
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Telephone 404 554-9961. Ext. 3360 l
404 724-8114 Ext. 3360.
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September 5, 1984 N 5a"*" *m'c $vSte'"
Vogt!e Project
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jUnited~ States' Nuclear Regulatory Commission Office of Inspection and Enforcement File:
X78G10 Region II - Suite 3100 Log:
GN-412
,101 Marietta Street Atlanta, Georgia 30303
Reference:
50-424/84-20, 50-425/84-20 Attention:.Mr. R. C. Lewis The Georgia Power Company wishes to submit the following information concerning the violations discussed in your inspection report 50-424/84-20 and 50-425/84-20:
(
Violation 50-424, 425/84-20-01 " Failure to Follow Procedures for Hanger i
and Structural Steel Inspections" - Severity Level V.
}
The violation identified discrepancies in two independent areas of inspection, pipe. hanger inspections and structural steel inspections.
In this response, Georgia Power Company has addressed each inspection area separately for each of the response criteria of 10 CFR 2.201.
(1)
A.
Pipe hanger inspection:
Georgia Power Company acknowledges the violation as identified in the NRC inspection report.
B.
Structural steel inspection: Georgia Power Company acknowledges the violation as identified in the NRC inspection report with one exception.
The NRC inspector identified a maximum shear stud spacing of 14 1/4" in the inspection details section of the report.
Georgia Power Company quality control personnel have made-careful measurements of the shear stud spacings in question and have identified a maximum spacing of 14".
(2) The reasons for the violations are as follows:
l A.
Pipe hanger inspection:
Failure to identify that the bolt threads for hanger V1-1206-007-H052, Revision 1,
were not upset as required is attributed to inspector. error.
Following l'
the NRC inspection, a reinspection was conducted of' fifteen additional previously accepted hanger installations of the type identified in the violation. No discrepancies were identi-i fied in the reinspection; therefore, Georgia Power Company considers the discrepancy identified in the violation to be an isolated case.
_ _. -. _. _.. _ _..._.. _.,..__. _. _. _ _ _. __,_. _..,._ -,__ ~ _ _
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- Mr. R. C. Lewis Page Two B.
Structural steel inspection:
The acceptance of shear stud installations in violation of the spacing requirements of drawing AX2D11F001, Revision 16, and AWS D1.1-1975 is due to the misinterpretation of these requirements by quality control inspection personnel.
AWS D1.1 states that shear studs may be relocated 1" from the location shown on design drawings _with respect to each other.
Inspection personnel failed to recognize the "with respect to each other" condition of this tolerance and applied the i 1" tolerance to each stud.
As a_ result, field work performed to a 12" spacing requirement was accepted for spacings ranging from 10" to 14" rather than the proper 11" to 13" spacing cited by the NRC inspector.
This is considered a generic problem for structural steel shear stud installations.
It should be noted that there is no indication that the number of studs installed has been affected by the spacing violations.
(3) The following corrective actions have been taken:
A.
Pipe hanger inspection:
A Deviation Report has been initiated to identify and resolve the improper installation of pipe clamp bolts in hanger V1-1206-007-H052.
A reinspection of fifteen additional pipe hangers was conducted to determine if a generic problem existed.
No additional discrepancies were identified.
B.
Structural steel inspection:
A Deviation Report has been initiated to identify and resolve the specific shear stud spacing discrepancies as identified in the NRC inspection report.
A generic Deviation Report has also been generated to initiate an engineering evaluation of the adequacy of pre-viously installed structural steel with shear stud spacing at 10" and 14".
Additional corrective actions may be required depending on the results of the engineering evaluation.
(4) The following actions have been taken to prevent further violations:
A.
Pipe hanger inspection:
All quality control inspection per-sonnel involved in pipe hanger inspections have been given written instructions to pay closer attention to hanger installa-tions using a single nut to ensure that threads are upset as required.
B.
Structural steel inspection:
All structural steel inspection personnel have been instructed in the correct interpretation i
of AWS D1.1 shear stud spacing tolerances.
In addition, the Georgia Power Company structural steel installation and inspec-tion procedure (CD-T-16) is being revised to specifically address the spacing tolerances of AWS D1.1-1975.
A-Mr. R.'C. Lewis Page Three (5) Corrective actions for pipe hanger and structural. steel inspection discrepancies will be completed by October 8, 1984.
Full compliance with applicable regulatory requirements will be achieved at that time.
This response contains no proprietary infonnation and may be placed in the NRC Public Document Room.
Yours truly, C OWn D. O. Foster REF/D0F/tdm xc:
U. S. Nuclear Regulatory Commission Attn: Victor J. Stello, Jr., Director Office of Inspection and Enforcement Washington, D. C.
20555 R. J. Kelly D. E. Dutton J. A. Bailey L. T. Gucwa R. E. Conway W. F. Sanders
- 0. Batum M. Malcom G. F. Head R. H. Pinson H. H. Gregory G. Bockhold J. T. Beckham B. M. Guthrie W. T. Nickerson P. D. Rice R. A. Thomas E. D. Groover J. L. Vota C. S. McCall G. A. McCarley C. E. Belflower