ML18113A456

LER 1976-011-00 for St. Lucie Unit 1, During Preoperational Testing, Steam Driven Auxiliary Feedwater Pump Tripped on Overspeed

ML18113A456
Person / Time
Site:	Saint Lucie
Issue date:	05/07/1976
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-76-111 LER 1976-011-00
Download: ML18113A456 (7)

Text

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-eau -"OB, ', $ ~ U.S. NUCLEAR BEGULATOBV COIUl~'ION DOCKET NUMBER 50-335 FILE NUMBER NRC DISTRIBUTION FDB PART 50 DOOI(FT ViATERIAL XNCXDENT REPORT TO: FROM: DATE OF DOCUMENT FLORIDA POWER 6 LIGHT -COMPANY 5/7/76 NORMAN CD MOSELEY :MIAMI'LORIDA DATE RECEIVED A, 'D, SCHMIDT"'" 5/14/76

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! Q ORIGINAL 8fUNC LASSIF I E 0 QCOPV ~ 'NE SIGNED DESCRIPTION ENCLOSURE I I LTR, TRANS THE FOLLOWXNG:'- LICENSEE EVENT RPT, (RO 50-335/76-11)'N 4/8/76 CONCERNING THE STEAM DRXVEN AUXILIARY FEEDWATER PUMP TRIPPING ON OVERSPEED DURING PREOP ~ TESTXNG ~

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DO NOT REMOVE PLANT NOTE: IF I'ERSONNEL EXPOSURE IS INVOLVED KAME'T; SEND DIRECTLY TO KREGER/J ~ COLLXNS LUCIE 81 SAFETY FOR ACTION/INFORMATION ENVIRO 6 RJ BRANCH CHIEF: ZIEMANN N/3 CTE FOR ACTLON I LXC. ASST: DIGGS u/ CYS ACRS CYS HOLDXNG/ ENT TO LA INTERNAL DISTRIBUTION ILEE FIT NRC PDR

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FLORIDA POWER 5 LIGHT CQ."iIPA'IY May 7, 1976 PRN-LI-76-111 Mr. Norman C. Moseley, Director, Region II Office of Inspection and Enforcement, U. S. Nuclear Regulatory Commission 230 Peachtree Street, N.W., Suite 818 Atlanta, Georgia 30303 .

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Dear Mr. Moseley:

rz REPORTABLE OCCURRENCE 335-76-11 trail ST. LUCIE UNIT 1 DATE OF OCCURRENCE: APRIL 8, 1976 STEAM DRIVEN AUXILIARY FEEDWATER PUMP The attached Licensee Event Report is being submitted in accordance with Technical Specification 6.9 to provide 30-day notification of the subject'ccurrence.

Very truly yours, D. chmidt Vice President Power Resources ge (t'""

gggrrr C~y eeea MAS/cpc Attachment cc: Jack R. Newman, Esquire Director, Office of Inspection and Enforcement, (30)

Director, Office of Management Information and Program Control (3)

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LICENSEE EVENT REPORT CONTZRQL B~LOCK (P E PRINT AU REQUIRED INFORMATION) 6 0041111 UCENSEE UCENSC EVENT FLS'LS1 NAME 0 p ppppp UCENSE NUMBER TYPE TYP'E

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7 89 14 15 25 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCE OOCKET NUMBER EVENT OATE REPORT OATE

~01 cowv L ~L 0 5 0 0 3 3 5 0 4 0 8 7 6 0 5 0 7 7 6 7 8 57 58 59 60 61 68 69 74 75 60 EVENT OESCFIIPTIQN

[oa2j Durin oreoaerational testing, the steam driven auxiliary feedwater pump 7 8 9 eo Qg89 tri ed on oversveed. Subse uent .attempts to electrically cycle governo

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80 tOa~J 4 re unsuccessful and the valve was manuall closed. A 89 eo Qo g manufacturer's re resentative was notified and, after investigation, the 7 8 9 80

.foa6J roblem was corrected. The feedwater pump was then returned. to service.

7 8 9 PANE eo SYSTEM CAUSE COMPONQg COOC COOE COMPONENT COOE, SUPPUER MANUFACTURER

[OD~J ~HH ~E V A L V 0 F ~A W 2 9 0 N 7 8 9 10 11 ,'l2 17 43 47 CAUSE DESCRIPTION Q~e The aooarent cause of the overs eed tri was faulty speed control by the 7 8 9 eo IoussIovernor.

7 8 9 It was found that the governor valve actuator would not 80

~1 0 res ond to voltage signals from the controller because of an open 7 89 FAC:UTT METHOO QF 80 STATUS POWER OTHER STATtJS OlSCOVERY OtSCQVERY OESCRlPTlQN

@~g ~E ~oo o N/A N/A

'0 7 8 9 10 12 13 46 80 FORM OF ACTMTY COATENT RELEASuD QF RELEASE AMOUNT,OF ACTlVlTY LOCATlQN OF RELEASE

~Z ~Z N/A N/A 7 8 9 11 44 45 PERSONNEL EXPOSURES NUMBER TYPE OESCRlPTION

~s ~oo 0 ~z N/A 7 89 11 12 13 80 PERS'ONNEL INJURIES

~4000 7 8 9 11 OESCRlPTION 12 N/A 80 PROBABLE CONSEQUENCES

~15 7 8 9 80 LOSS QR" OAMAGE TQ FACIUTY TYPE OESCRlPTlQN z N/A 7 89 10 80 PUBLICITY N/A 7 89 ~ 80-AOOITIONAL FACTORS'ee Pa e Two for continuation of Event and Cause descriptions.

7 8 9 80 7 89 M. A. Scho man Ct0 I~ I

REPORTABLE OCCURRENCE 335-76-11 LICENSEE EVENT REPORT PAGE TWO EVENT DESCRIPTION (continued)

This was the first occurrence of this type. (335-76-11).

CAUSE DESCRIPTION (contiriued) circuit in a solder joint in the external amphenol plug that mates to the actuator. It was also found that the ramp generator signal convertor gain could not be set properly. The spare ramp signal convertor was calibrated, installed, and satisfactorily tested.

The original ramp signal convertor was returned to the manufacturer for repair.

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