ML20087N980
| ML20087N980 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 03/29/1984 |
| From: | Tucker H DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8404050289 | |
| Download: ML20087N980 (2) | |
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DUKE POWER GOMPANY P.O.150X 33180 CitARLOTTE. N.O. 28242 81 MAR 2 4 hahc9 29, 1984 Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Ge::rgia 30303 Re: -Catawba Nuclear Station Units 1 and 2 Docket Hos. 50-413 and 50-414
Dear Mr. O'Reilly:
Please find attached supplement to Significant Deficiency Report No. SD 414/83-17.
It describes further reviews that have taken place and additional situations that require corrective action. Since this review was extended to Unit 1, please re-number this Significant Deficiency as No. 413-414/83-17.
Very truly yours, b,-
Hal B. Tucker LTP/php Attachment
'cc: Director INP0 Records Center Office of Inspection & Enforcement Suite 1500 U. S. Nuclear Regulatory Commission 1100 Circle 75 Parkway Washington, D. C. 20555 Atlanta, Georgia 30339 NRC Resident Inspector Mr. Robert Guild, Esq.
Catawba Nuclear Station Attorney-at-Law P. O. Box 12C97 Palmetto Alliance Charleston, South Carolina 29412
.21351 Devine Street Columbia, South Carolina 29205 OFFICIAL CDP?,
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8404050289 840329 1
PDR ADOCK 05000413 8
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JP0/HBT/LTP March 29, 1984 Duke Power Company Catawba Nuclear Station Supplemental Response to Significant Deficiency No. 413-414/83-17 March 29, 1984 From the initial response, NCIRs 17404 and 17679 addressed the situation where Construction had. installed special weld bosses (SWB) where special weld boss restrictors (SWBR) were specified by Design. This problem resulted from the close similarity of the lot numbers for these two different type bosses. Construction isometrics and weld tickets were reviewed _to ensure the correct type of boss was allocated on the construction isometric and installed in the field.
After the above review was complete, a Unit 2 ND system SWBR was to be
. temporarily plugged for system flush.
It was noticed that the restrictor was overdrilled; thus, NCIR 17933 was generated. Since this was not detected during the installation in process inspections, other SWBRs are suspect.
Presently, we are in the process of verifying the correct hole size for all SWBRs by ultrasonic or radiographic examination. Also, a review of completed weld tickets for Unit 1 has already identified one other SWBR which was overdrilled.
In this.particular case, the inspector recorded the hole size _on the process control. This was not a requirement. Con-currently, during a review of constructior isometrics, another situation was discovered. A SWB was allocated and installed. This agreed with the
- Design isometric but the Design flow diagram calls for a SWBR. Design is reviewing all flow diagrams versus piping drawings to verify SWBR locations.
Construction is' also comparing construction isometrics to Design flow diagrams to ensure they agree.
The present completion date is March 30,1984. Due to additional problems and rework that have been identified, the completion dates will now be April 15, 1984 for Unit 1 and June 30, 1984 for Unit 2.
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