ML20081G074

Third Interim Deficiency Rept,Item 117 Re Welding on 6.9 Kv Switchgear Breakers.Initially Reported on 830211.Structural Const Insp Added to Insp Check Sheet for Seismically Designed Ac & Dc Distribution.Also Reportable Per Part 21

ML20081G074
Person / Time
Site:	Harris
Issue date:	10/31/1983
From:	Parsons R CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
CON-NRC-135, REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, 117, NUDOCS 8311040102
Download: ML20081G074 (4)

Text

P. /

Cp&L Carolina Power & Light Company g NOV 2 nja ; ,y P. O. Box 101, New Hill, N. C. 27562 October 31,1983 Mr. James P. O'Reilly NRC-135 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Suite 2900)

Atlanta, Georgia 30303 CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT 1986 900,000 KW - UNITS 1 & 2 WELDING DEFICIENCIES ON CLASS lE 6.9KV CIRCUIT BREAKERS -ITEM 117

Dear Mr. O'Reilly:

Attached is our third interim 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 December 30,1983.

Thank you for your consideration in this matter.

Yours very truly, yrf r e =w I R. M. Parsons l Project General Manager Shearon Harris Nucler Power Plant i

RMP/sh Attachment ec: Mr. G. Maxwell /R. Prevatte (NRC-SHNPP)

Mr. R. C. DeYoung (NRC)

I

~

8311040102 831031 Ta

! PDR ADOCK 05000400 S PDR ;g5GICIALCO@#

l W) E Y IlI

}-

CAROLINA-POWER & LIGHT COMPANY

)

SHEARON HARRIS NUCLEAR POWER PLANT Unit No. 1 Interim Report Welding on 6.9kV Switchgear Breakers Item 117 October 31, 1983 Reportable Under 10CFR50.55(e) s Reportable Under 10CFR21

+

p 4 p -

w 7w g' r er-t *y-w F--* y ew-vya .syp,-g- e=w g- g g mF y-om-g-w-~ t wy yq.-- w--Mw*=--Nevy--

=

'14 h

~

SUBJECT:

, . Shearon Harris Nuclear Power Plant / Unit No.1 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 Seinens-Allis , Inc .

ITEM: Welding in Class 1E 6.9kV switchgear breakers.

SUPPLIED BY: 'Siemens-Allis, Inc., Sanford, North Carolina.

NATURE OF DEFICICNCY: During 1980,- the Switchgear Division of Siemens-Allis, Inc., Sanford, North Carolina, shipped 6.9kV switchgear breakars' to the CP&L site on Purchase Orders NY-435112 Land.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 j inspection requirements.

On January 10, 1983, Siemens-A111s' 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_ enough to conclude that the equipment on site adequately reflected the same structural construction of the equipment seismically tested.  ;

JDATE PROBLEM 10CCURRED: Refer to sect. ion above.

.DATE PROBLEM REPORTED: February 11, 1983 - CP&L- (N. J. Chiangi) notified the

/- NRC (Ms. L. Watson) that this item was potentially reportable under' 10CFR50.55(e) and 10CFR Part 21.

i- fon March 11,,1983, CP&L (N. J. Chiangi) notified ' the

- ?UtC (Mr. C.' Hehl) that; this item was reportable under

~ 10CFR50'.55(e) : and 10CFR Part .21.

-SCOPE OF uPROBLEM:  : The deficiency involves the twenty-five Unit 1 Class 1E 6.9kV switchgear. breakers.

t -

y

}

- [..

- .- c,b a _ . . _ _ - - - - _...---n.,. . , . . , - . . . _ . - - - - . - . . _ . _ . . . - . . _ _ , _ . ~ . . _ . - . - . _ . .

SAFETY IMPLICATION: Seismic qualification of the Class 1E switchgear assembly is required to assure that safety-related loads are capable,of being powered during a seismic event..

REASONS' DEFICIENCY IS 1REPORTABLEs. Failure of the supplierf s QA Program to control the t' welding on.the. switchgear breakers has resulted in breakers being shipped to the site which did not adequately reflect the same structural construction ss that of the, piece of equipment which has been

. seismically- tested and whose test report has been

. accepted._. Failure of the breakers to bel 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 r

the drawings and/or procedures used for manufacturing /

fabrication lof the equipment will reflect the actual structural and operational characteristics of the equipment being seismically qualified.

.2. A11' Class 1E 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.

l- -b. Quantity of weld on connected pieces is at l 1 east the amount on the test unit.-

s FINAL.

REPORT:: Due to problems in assembly and welding, Siemens-Allis

~

was not _ able to meet the projected completion date of

. . 0ctober 31, -1983. The problems have been overcome and zSiemens-Allis has begun to produce the required breakers.

77 A final report will be issued once the corrective action described inLItem 2 is completed. It is currently proj ected that the submittal date will be December 30, 1983.

7 i '