ML20071L750
| ML20071L750 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 09/13/1982 |
| From: | Chiangi N CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, CQAD-82-1560, NUDOCS 8209240023 | |
| Download: ML20071L750 (4) | |
Text
e egg Carolins Power & Light Company September 13, 1982 FILE: SH N-2/18 CQAD 82-1560 ITEM 96 Mr. James P. O'Reilly United States Nuclear Regulatory Conunisteion
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Region II
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101 Marietta Street, Northwest
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3 Atlanta, Georgia 30303
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SHEARON HARRIS NUCLEAR POWER PLANT
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DOCKET NO. 50-400
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'fy SEISMIC PIPE HANGERS PREVIOUSLY ACCEPTED BY QC WELDING INSPECTOR 3
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Dear Mr. O'Reilly:
Attached is an interim report on the subject item which was deemed reportable per the provisions of 10CFR50.55(e) on August 13, 1982.
CP&L is pursuing this matter, and it is currently projected that corrective action and submission of the fina1 report will be accomplished by July 1,1983.
Thank you for your consideration in this matter.
Yours very truly, i
I Cw=A.
N.
iangi - Manager Engineering & Construction Quality Assurance / Quality Control NJC/gea (212)
Attachment cc:
Mr. G. Maxwell W/A Mr. V. Stello O209240023 820913 PDR ADOCK 05000400 4
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CAROLINA POWER & LIGHT COMPANY Si!EARON HARRIS NUCLEAR POWER PLANT UNIT NO. 1 PIPE HANGERS PREVIOUSLY ACCEPTED BY QC WELDING INSPECTORS Interim Report September 8, 1982 Reportable Under 10CFR50.55(e)
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SUBJECT:
Deficient field welds on pipe hangers previously accepted by QC welding inspectors.
ITEMS:
Seismic pipe hangers.
SUPPLIED BY:
N/A - Hangers furnished by Bergen-Paterson, but problem deals with field welds.
NATURE OF DEFICIENCY:
1.
Missing and undersized welds 2.
Cosmetic weld defects 3.
Inaccurate and incomplete QC documentation 4.
QC inspections performed by personnel whose work was suspect 5.
Poor workmanship DATE PROBLEM OCCURRED:
Prior to July 29, 1982 I
DATE PROBLEM REPORTED:
August 13, 1982 - CP&L (N. J. Chiangi) notified the NRC (A. Hardin) that this item was reportable under the provisions of 10CFR50.55(e).
SCOPE OF PROBLEM:
Pipe hangers having field welds were found to he unacceptable.
Per the letter submitted on August 13, 1982, 38 hangers were identified as being unacceptable.
Since that time approximately 140 additional hangers have been identified as having I
weld deficiencies. As a result of the increase in problems it is thought that the hanger program needs i
extensive evaluation.
For this reason, approximately 4000 seismic' pipe hangers must be reinspected to ensure all identified problems are corrected.
Note The scope of the reinspection will include undersized skewed-tee welds i
l which were found te be potentially j
reportable (see CQAD 82-519 dated 3/24/82) and the deficient shop welds which were reportable (see NPED-821332 dated 8/10/82).
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y.
SAFETY IMPLICATION:
Deficient welds could cause a pipe hander supporting a safety-related pipe to fail under seismic conditions.
As a result, this could adversely affect the safe operation of this facility.
REASON THE DEFICIENCY IS REPORTABLE:
The deficiencies represent a breakdown in the QA program as well as deficiencies in construction.
CORRECTIVE ACTION:
1.
Have prepared a pipe hanger inspection /
documentation procedure (QCI 19.3).
2.
Continuing to hold training classes with both craft and inspection personnel.
3.
NDEP-601 is being revised so that visual inspection criteria for pipe hangers will comply wich AWS D.l.l.
i 4.
Have begun routine surveys performed by QC Supervisor on each QC inspector's field work to ensure that the inspector complies with the QC procedures.
5.
Each inspector's paper work is being reviewed on a routine basis.
6.
Documentation has been reviewed identifying hangers requiring reinspection. Preparations are in process for hanger reinspection, reworking - if required, and correctly documenting all affected seismic pipe hangers.
FINAL REPORT:
A final report will be issued once the corrective action described above has been completed.
It is projected that the submittal date is July, 1983.
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