ML20087N881
| ML20087N881 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 03/29/1984 |
| From: | Parsons R CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-84-211-000 PT21-84-211, PT21-84-211-000, NUDOCS 8404050131 | |
| Download: ML20087N881 (4) | |
Text
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_.._m ga ger & Light Company P. O. Box 101, New Hill, N. C. 27562 March 29,1984 Mr. James P. O'Reilly NRC-199 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Suite 2900)
. Atlanta, Georgia 30303 CAROLINA POWER & LIGHT COMPANY
- SHEARON HARRE NUCLEAR POWER PLANT 1986 - 900,000 KW - UNIT 1 WELDING DEFICIENCIES ON CLASS lE 6.9KV CIRCUIT BREAKERS -ITEM 117
Dear Mr. O'Reilly:
Attached is the final report on the subject item which was deemed reportable per the provisions of 10CFR50.55(e) and 10CFR, Part 21, on March 11, 1983. With this report,
. Carolina Power & Light considers this matter closed.
If you have any questions regarding this matter, please do not hesitate to contact me.
Yours very truly, W
R. M. Parsons Project General Manager Shearon Harris Nuclear Power Plant RMP/sh Attachment ec:. Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)
Mr. R. C. DeYoung (NRC) 9404050131 840329 OFFICIAL COPY PDR ADOCK 05000400 S
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'SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO. 1 FINAL REPORT WELDING ON 6.9kV.SWITCHGEAR BREAKERS ITEM 117 M-
- March 22, 1984
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REPORTABLE UNDER 10CFR50.55(e) AND 10CFR21 s
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[ SAFETY
-1MPLICATION:
- Seismic. qualification'of the Class IE switchgear assembly
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is required to assure'that safety-related loads are
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capable of-being powered during.a seismic event.
' REASONS
. DEFICIENCY-IS-cREPORTABLE:
' Failure of the~ supplier's QA Program to control the welding'on the switchgear. breakers has resulted in
. breakers being shipped to the site which did not adequately' reflect the same structural construction as that of the piece of equipment which has been seismically tested and whose test report has been accepted. Failure of the breakers to be seismically constructed could result in the_ loss of power supply to safety-related loads during a seismic event as a result of failure of the breaker.
g CORRECTIVE-ACTION:
1.
. Inspection'of structural construction has been added to the'VQA inspection check. sheet for Eseismically-designed AC and DC distribution equipment yet-to be shipped. Any equipment on site.
f will be: inspected,by Site QA-by. sampling on each Purchase' Order...:In order-to preclude.a similar
, ' situation, suppliers'of' seismically-designed AC'and DC distribution' equipment-have been requested to provide a written response describing the provisions
'in'their quality assurance program, which would assure that'the drawings and/or procedures used for manufacturing / fabrication of the equipment.will I
= reflect the actual structural and operational characteristics of the equipment being seismically
' qualified.
2.
All Class IE breakers at the site have been returned
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to the vendor.
The vendor will fabricate new breakers to meet'the following weld criteria:
E a.
-All welds on the braces meet the acceptance
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criteria of Siemens-Allis.
b.
- Quantity of weld on connected pieces is at least the amount on the test' unit.
FINAL REPORT:
The corrective action as' detailed in Item 2 has been accomplished as verified in our site QA Unit'.s inspection I
of welding for the new' breakers during key stages in the fabrication of these breakers.
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.Since no welding deficiencies were found, this item can be~ closed. This will be the final report issued for NRC
-Item 117..
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SUBJECT:
'Shearon Harris Nuclear Power Plant / Unit No. I 10CFR50.55(e) and 10CFR, Part 21 Reportable Deficiency.
. Welding for 6.9kV Class IE switchgear breakers purchascd c under Purchase Orders NY-435112 and NY-435113 from Siemens-Allis, Inc.
ITEM:
-Welding in Class IE 6.9kV switchgear breakers.
SUPPLIED BY:
Siemens-Allis, Inc., Sanford, North Carolina.
NATURE OF i
DEFICIENCY:
During 1980, the Switchgear Division of Siemens-Allis, Inc., Sanford, North Carolina, shipped 6.9kV switchgear breakers to the CP&L site on Purchase Orders NY-435112 and NY-435113. Welding in the breakers was not inspected by Ebasco's Vendor Quality' Assurance representative prior to shipment, as the check plan did not include mechanical inspection requirements.
On January 10, 1983, Siemens-Allis furnished shop
- p drawings so that an inspection of the welding could be performed.. The inspection revealed that the weld lengths and sizing were not in conformance with the vendor shop drawings.
It was also noted that the quality of the
-welding was poor.
Although the switchgear breakers on site and those seismically tested exhibit similar welding deficiencies, they were not similar enough to conclude that the equipment on site adequately reflected the same structural ~ construction of the equipment seismically tested.
DATE PROBLEM:
.DCCURRED:
Refer to section above.
W' DATE PROBLEM-REPORTED:
February 11, 1983 - CP&L (N. J. Chiangi) no tified the NRC (Ms. L. Watson) that this item was_potentially reportable under 10CFR50.55(e) and 10CFR, Part 21.
On March 11, 1983, CP&L (N. J. Chiangi) notified the NRC (Mr. C. Hehl) that this item was reportable under
- 10CFR50.55(e) and 10CFR, Part 21.
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' SCOPE OF-PROBLEM:
The deficiency involves the twenty-five Unit 1 Class IE
- 6.9kV switchgear breakers.