ML20004C786
| ML20004C786 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 06/01/1981 |
| From: | Oprea G HOUSTON LIGHTING & POWER CO. |
| To: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, ST-HL-AE-672, NUDOCS 8106050252 | |
| Download: ML20004C786 (3) | |
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The Light COMMY Houston Lighting & Power RO. Box 1700 Houston. Texas 77001 (713)228-9211 June 1, 1981 ST-HL-AE-672 SFN: V-0530
/g Mr. Karl Seyfrit
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h Director, Region IV
?f J Nuclear Regulatory Comission d, u.s.UU O 11bOI" 2 wfSi@me [f 611 Ryan Plaza Drive, Suite 1000 c
Arlington, Texas 76012
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Dear Mr. Seyfrit:
South Texas Project Units 1 & 2 Docket Nos. STN 50-498, STN 50-499 Second Interim Report Concerning Vendor Fabricated Structural Steel Please find attached our second interim report regarding nonconformances of welds in vendor fabricated Category I structural steel. This item was previously reported to your office under the recuirements of 10CFR50.55(e) on January 8, 1981. The r:xt interim report will be submitted to your office by October 1, 1981.
If you have any questions, please contact Mr. Michael E. Powell at (713) 676-8592.
Very truly yours, P J
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Second Interim Report Concerning Vendor Fabricated Structural Steel This.second interim report provides a status update of activities undertaken to resolve the nonconforming weld conditions for Category I structural steel.
The program initiated to reinspect vendor supplied Category I structural steel is continuing.
In accordance with project procedures, nonconformance reports have been written on each nonconforming condition identified to date.
In general, the identified conditions have predominantly consisted of undersized welds and undercut. As the nonconformance reports are issued, they are forwarded for an Engineering evaluation. The Engineering evaluation is performed to assess the acceptability of the actual fabricated weld conditions relative to the applicable design loads. No nonconforming weld conditions have been identified as representing a failure condition (i.e. Safety hazard) at this time. Some welds have been identified for rework in order to reestablish project design margins or to support the construction schedule.
Independent welding consultants with extensive AWS Code experience (including active Committee members) have inspected the welds identified as being in nonconformance with AWS D1.1.
Their finding stated that the Quality Control acceptance criteria implemented on the South Texas Project was in fact, more stringent than those required by the AWS Code.
As a result of the consultants findings, the project interpr: W tion of AWS Code requirements is being reevaluated in order to better uefine the scope and acceptance criteria for AWS welds.
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