ML20002A952
| ML20002A952 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 10/09/1980 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20002A948 | List: |
| References | |
| SBN-136, NUDOCS 8012090232 | |
| Download: ML20002A952 (2) | |
Text
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U PUBLIC SERVICE Company of New Hampshire SEABROOK STATION m
Engineering Office:
(,)
20 Turnpike Road Westborough, MA 01581 October 9, 1980 SBN-136 T.F. B 4.2.7 U.S. Nuclear Regulatory Commission Reion I 631 Park Avenue King of Prussia, Pernsylvania 19406 Gentlemen:
COMBINED INSPECTION 50-443/80-07 and 50-444/80-07 Pursuant to receipt of your correspondence regarding the results of the subject inspection, we offer the following reply:
NRC Notice of Violation:
10 CFR 50, Appendix B, Criterion XV states, in part, that:
" Nonconforming items shall be reviewed and accepted, rejected, repaired, or reworked in accordance with documented procedures."
The Seabrook Station PSAR for Units 1 and 2 states, in part, in paragraph 17.1.15 that:
"Each organization performing quality related activities covered by this. program shall provide measures to prevent inadvertent use or installation of material, parts or components which do not conform to the applicable requirements."
Pullman Power Products Document No. XV-2, Revision 6, requires that a non-conformance report be initiated for, among other things, evidence of a special process out of control and that the items involved be segregated and a " Hold Tag" placed on them.
Contrary to the above, on July 10, 1980, several embed plates, with marked.
evidence of stud weld conditions at variance with AWS Dl.1 requirements, were identified with " Accept Tags" and located in the field apparently ready for installation.
Neither contractor nor vendor documentation was available to substantiate that the nonconforming condition had been reviewed, properly dispositioned, and ultimately accepted.
This item is an infraction applicable to Docket Number 50-443.
$01:1(w 0 WL
- U.S.'Nuclocr R:gulatory Commission Page 2 SBN-136 Resporce:
Corrective Action Taken and Results Achieved YAEC documented the condition by issuing Deficiency Reports 052 and 053 to the UE&C Resident Construction Manager. Perini and Pullman Power Products were directed by the Resident Construction Manager to take immediate action to re-inspect all stud welds on AP/APM123.embedment plates at the site installed by the contractor and accessible for inspection and those which had not been installed. This resulted in the reinspection of twenty four thousand six hundred and sixty-two (24,662) stud welds. Of this, seven hundred thirty-eight (738) were noted to have less than the 360 weld flash required by AWS 0
standards and were re-tested by bending 15. This is in addition to the tests of these welds which had previously been performed by the supplier. One hundred nineteen (119) failed the bend test and were re-welded to meet applicable AWS requirements. A total of twenty-two (22) studs could not be visually inspected and/or' bend tested due to rehar interference and six (6) plates could not bc visually inspected. These were documented on nonconformance reports (Perini NCR #1021 and Pullman NCR #339). The NCR's have been forwarded to UE&C for an engineering analysis and disposition.
Stud welds rejected as a result of the bend tests represent less than 0.5% of those inspected. The embedment plates are designed to have a safety margin of up to 1.5.
Concurrent with the re-inspection of the hardware, the supplier's procedural re-quirements were reviewed and found to be correct, therefore, no nonconforming condition existed.
Ryerson procedure WP-2 requires that studs bent to determine stud weld acceptability be straightened to their original position if accepted, in accordance with UE&C requirements.
UE&C imposed this requirement since an embedment plate may have a tensile or shear load and UE&C Engineering directed that all studs be straightened for the tensile case.
Increased surveillance by Ryerson and the reinstruction provided to UE&C Surveil-lance Representatives and Site Receiving Inspectors will result in additional 4
emphasis being placed on the inspection of stud welds.
UE&C is preparing a report on acceptance criteria for stud welds since the AWS Dl.1 standard does not establish clear guidelines ' as to what constitutes a failure.
As an additional step to correct and control this problem, Ryerson will procure embed plates from only one supplier (with the exception of special fabrications) which will enable them to exercise greater control.
Full compliance will be achieved by October 31, 1980.
Very truly yours, I
m l
(
John DeVincentis Project Manager JDV: tan
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