ML20083J885

Fourth Interim Part 21 Rept on Item 117 Re Welding on Siemens-Allis 6.9-kV Switchgear Breakers.Initially Reported on 830211.All Class IE Breakers Returned to Vendor.Final Rept Expected by 840229

ML20083J885
Person / Time
Site:	Harris
Issue date:	12/28/1983
From:	Parsons R CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
CON-NRC-162, REF-PT21-84-151-000 10CFR-50.55E, 117, PT21-84-151, PT21-84-151-000, NUDOCS 8401050470
Download: ML20083J885 (4)

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Po P. O. Box 101, New Hill, N. C. 27562 December 28, 1983 Mr. James P. O'Reilly NRC-162 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northw?st (Suite 2900)

Atlanta, Georgia 30303 CAROLINA POWER & LIGilT COMPANY SHEARON HARRIS 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 our fourth interic report on the subject item which was deemed reportable per the provisions of 10CFR50.55(e) and 10CFR, Part 21, on March 11, 1983. CP&L is pursuing this matter, and it is currently projected that corrective action and submission of the final report will be

. accomplished by February 29, 1984.

Thank you for your consideration in this matter.

Yours very truly, pyy 2:ps R. M. Parsons Project General Manager Shearon Harris Nuclear Power Plant RMP/bs Attachment cc: Mr. G. Maxwell /R. Prevatte (NRC-SHNPP)

Mr. R. C. DeYoung (NRC) 8401050470 831228 PDR ADOCK 05000400 s PDR r_

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CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO. 1 FOURTH INTERIM REPORT WELDING ON 6.9kV SWITCHGEAR BREAKERS ITEM 117 DECEMBER 28, 1983 REPORTABLE UNDER 10CFR50.55(e) AND 10CFR21

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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 1E switchgear breakers purchased 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 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, Siemenc-Allis furnished shop 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 encugh to conclude that the equipment on site adequately reflected the same structural construction of the equipment seismically tested.

DATE PROBLEM OCCURRED: Refer to section above.

t DATE PROBLEM

REPORTED

February 11, 1983 - CP&L (N. J. Chiangi) notified the NRC j (Ms. L. Watson) that this item was potentially reportable I under 10CFR50.55(e) and 10CFR, Part 21.

i 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.

I SCOPE OF PROBLEM: The deficiency involves the twenty-five Unit 1 Class IE l 6.9kV switchgear breakers.

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SAFETY IMPLICATION: Seismic qualification of the Class IE switchgear assembly is required to assure that safety-related loads are capable of being powered during a seismic event.

REASONS DEFICIENCY IS REPORTABLE: Failure of the supplier's OA 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.

CORRECTIVE '

ACTION: 1. Inspection of structural construction has been added to the VQA inspection check sheet for seismically-designed AC and DC distribution equipment yet to be shipped. Any equipment on site 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 reflect the actual structural and operational characteristics of the equipment being seismically qualified.

2. All Class IE breakers at the site have been returned to the vendor. The vendor will fabricate new breakers to meet the following weld criteria:

a. All welds on the braces meet the acceptance criteria of Siemens-Allis.

b. Quantity of weld on connected pieces is at least the amount on the test unit.

FINAL REPORT: In our last interim report, we projected completion of I

corrective action and submission of the final report by December 30, 1983. Siemens-Allis has indicated that corrective action will not be completed at this time.

A final report will be issued once the corrective action l described in Item 2 is completed. It is currrently projected that the submittal dcte will be February 29, 1984.