ML20101M892

Initial Part 21 Rept Re non-segregated Phase Electrical Bus Duct Mfg in 1972.Initially Reported on 920427.Detailed Calculations Being Done by FPC to Evaluate Momentary Fault Current Against Supplied Ratings of All Bus Sections

ML20101M892
Person / Time
Site:	Crystal River
Issue date:	06/30/1992
From:	Metcalfe W CALVERT CO., INC.
To:	NRC
References
REF-PT21-92 NUDOCS 9207090068
Download: ML20101M892 (3)

Text

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- RICHLAND, MS 39218 " ' ' ' ' * ' ' " " ***

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h j . . . . REPORT OF POSSIBLE MON COMPLIANCE WITH CUSTOMER SPECIFICATIO j= OATE: JUNE 29e1992 i-

REFERENCE:

10CFR21.21 5

FLORIDA POWER CORPORATION PURCHASE ORDER PR3-16660 F* ORIDA POWER CORPORATION R0-3002,_ DATED 4/B/70 i

CALVERT JOB #2000 ~

i 21.21(3)(1) i INITIAL NOTIFICATION TO NRC OPERATIONS CENTER FAX $301/4 21.21(C 1)

REPORTED BY: WILLIAN A. METCALFE, VICE PRESIDENT '

1 THE CALVERT-COMPANY, INC.

j 2737 OLD BRANDON ROAO PEARL,_ MISSISSIPPI. 39208 L

PHONE 601/939-9666

{ FAX 601/939-9676 i

! 21.21(4)(11)

{- FACILITY:

i FLORIDA POWER CORPORATION.(FPC)

CRYSTAL RIVER UNIT B3-CRYSTAL RIVER, FLORIDA. .

! COMPONENT:

NON-SEGREGATED PHASE ELECTRICAL BUS DUCT, MANUFACTURED j IN 1972.-

4 21.21(4)(111)

MANUFACTURER:

i THE CALVERT COMPANY. INC.

MANUFACTURING FACILITY 120 AZTEC ORIVE RICHLAND, MISSISSIPPI 39218

{

PHONE 601/939-9191 FAX 601/932-2513 4

21.21(4)(19).

i- NATURE:

! DN 4/24/92- THE CALVERT COMPANY WAS REQUESTED B 1

CORPORATION TO Pd0 VIDE MONECARY SHORT - CIRCUIT NATINGS

! ELEC1RICAL1 BUS- FURNISHED'-ON' A80VE REFERENCE 00--JOB BASE i

UPON-THE INFORMATION AVAILABLE FROM THE ORIGINA DRAWINGS, SHORT CIRCUIT. CALCULATIONS WERE PERFORME0.

RESULTS FROM-4 CURRENT CALCULATIONS INDICATE THE MOMENTARY SHO TO BE LESS THAN THAT.AS SPECIFIED Id FPC $PECJ9AO-30 ASYNMETRICAL),

- IMPACT

i SHOULD CURRENT INTHE BUS BE SUBJECTED TO A 3-PHASE M0MENTA THE MAGNITUDE j

DAMAGE SUCH AS DEFORMATION OF THEOF 8000G AMPS ASYMMETRI BUS BARS - AND POSSIBLE CRACKING

! OF= BUS BAR SUPPORT BLOCKS COULO POSSIBLY OCCUR. -

FROM FLORIDA iPOWER -CORPORATION' PROBLEM REPOR

[- ATTACHED): 'IF THE NON SAFETY RELATED SECTIONS-0F T6E SUBJECT BUS i-DUCTS. FAIL 'IN THE ' EVENT ~ OF A FAULT, IT. CAN MAKE THE START-UP_

I" TRANSFORMER-AND/OR UNIT AUX TRANSFORMER UNAVAILABLE TO THE'4160V i

UNIT'AND ES BUSSES AND 6900V . BUSSES.- HOWEVER THE

, SECTIchS' THE BUS 0F THE BUS WILL. BE ABLE- TO HANDLE THE:FAILURE FAULT.: 0F,.

COULO ALSO _ RESULT IN POSSIBLE PERSONAL INJURY. HOWEVER

-NO BUS DEFINITE CAN BE ORAWN CONCLUSIONS REGARDING THE NON SAFETY '

UNTIL -CALCULATIONS ARE-COMPLETED-TO EVALUA AVAILABLE MOMENTARY FAULT CURRENT'ACAINST SUPPLIED R .

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i REPORT OF-POSSIBLE NON COMPLIANCE WITH-CUSTOMER: SPECIFICATIONS i

' 21.21(4)(v) -

THE4/27/92.

ON INFORMATION 0F SUCH DEFECT OR' FAILURE'TO COMPLY WA

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' 21.21(4)(vi) .

LDCATION:

, THE CALVERT COMPANY-IS .IN PROCESS __0FJCHECKING AtOTHER 2.. SAFET) ,

I- RELATED INSTALLED.. BUS TO DETERMINE IF OR WHERE THE SAME DESIGh BU 21.21(4)(vii)- _

b ACTION:

AVAILABLE MOMENTARY ' FAULT CURRENT: IS:SEING REVIEK D_BY POKR CORPORATION _ TO1SEE IF CALVERT CURRENT: RATING TO WITHSTAND- AVAILABLE MOMENTARY FAULT. CURRENT. PRELIMINARY REVIEW BY FLORIDA POWER CORPORATION SHOWS THAT TE .

SECTIONS RATING . OFs 63332 AMPS ASYMMETRICAL IS ADEGU

, CALCULATIONS-' ARE BEING DONE' 8Y -FLORIDA POWER- CORPO EVALUATE MOMENTARY FAULT-CURRENT- AGAINST SUPPLIED THE BUS SECTIONS REFERENCED 10 FPC PROBLEM REPORT.NO 9 21.21(4)(v111)

ADVISE: .

WiERE AS THE METH003- - FOR CALCULATING ~ THE ABILITY OF T WITHSTAND -CERTAIN SHORT -CIRCUIT : FORCES . MAY_ BE E CONSERVATIVE THAN-20 YEARS AGO. WE e HAVE: - SUGGEST POWER CORPORATION Aho CALVERT: JOINTLY TEST SAMPL RELATED BUS TO DETERMINE THE ACTUAL HOMENTARY THAT THE BUS WILL IN' FACT. WITHSTAND.-

-5 SIGNE0:: V ---

• AM A. 'METCALFD. VICC PRESIDENT-

< .c COPY:

MR RICHARD CAMPANALIE. PRESIDENT. THE CALVERT-CO., INC.

MR. HARRY XEELER.-MANAGER QUALITY ASSURANCE. THE CALVERT CO., INC.

MR. MATEE RAHMAN. PRINCIPAL ELECTRICAL' ENGINEER. FLORI v

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