ML18110A897

LER 1977-010-00 for St. Lucie Unit 1, Steam Driven Auxiliary Feedwater Pump

ML18110A897
Person / Time
Site:	Saint Lucie
Issue date:	03/18/1977
From:	Schmidt A D Florida Power & Light Co
To:	Moseley N C NRC/IE, NRC/RGN-II
References
PRN-LI-77-72 LER 1977-010-00
Download: ML18110A897 (7)

Text

3 NIIC Fo<<M.195 l I2 76$NRC DISTRIBUTION roA=RT 50 DO U.S.NUCLL'AA REGULATORY COMMISSION Cl(ET MATERIAL DOCKET,NUMOLA Wo-z zw FILE NUMAEA INCIDENT REPORT TO: Mr.Norman C.Moseley FROM: Florida Power 5 Light Company Miami, Florida A~Di Schmidt DATE OF DOCUMENT 3/18/77 DATE RECEIVED 4/1/77 LETTER gOAIOINAL Hcor Y DESCAIPTION ONOTORIZEO RFUNC LASS IF I E D PAOP INPUT FOAM ENCLOSURE NUMOEA OF COPIES AECEIVED Ltr trans the following:

RCKNOWX,EDGED

~~Licensee Event Report (RO 50-33'5/V7-10) on 2/17/77 concerning an alarm being received in the control room indicating, the circuit breaker for the<<C<<steam/riven auxiliafI feedwater pump steam valve cdntrol circuit tripped.~~~~~PLANT NAME: St.Luciq Unit No, 1 (1-P)(2-P)~RJL ,LIO NOT REMOVL('OTE:

XF PERSOKKL EXPOSURE XS INVOLVED SEND DIRECTLY TO KREGER/J, COLLINS BRANCH CHIEF: 8 3 CYS FOR ACTION LXCo ASST,: M CYS ACRS CYS ROLQQ4Q S NT FOR ACTION/INFORMATION Ch A TI3<<REG EELE R~EcM (2)MIPC SCHROEDER/IPPOLXTO HOUSTON NOVAK/CHECK GRDIE S CASE BUTLER HANAUER TEDESCO/MACCARY EXSENHUT BAER SHAO VOLLMER/BUNCH KREGER/J COLLINS 3 ,INTERNAL D I STR I BUTION LPDR4 TIC: EXTERNAL DISTRIBUTION CONTRSL NUMI3ER~7 Q'Qi p/gi y7 N'/NAc ro<<M 106 I2 70) e r p i f ug 1"Y

~.(ti~~~j h.f Qllg FLORIDA POWER 8(LIGHT COMPANY March 18, 1977 PRN-LI-77-72 Mr.Norman C.Moseley, Director, Region Al."il f mph Office of Inspection and Enforcement U.S.Nuclear Regulatory Commission 230 Peachtree Street, N.W., Suite 1217 Atlanta, Georgia 30303

Dear Mr.Moseley:

REPORTABLE OCCURRENCE 335-77-10 ST., LUCIE UNIT 1 DATE OF OCCURRENCE:

FEBRUARY 17, 1977 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 occurrence.

Very truly yours, D.Schmidt Vice President Power Resources MAS/cpc Attachment.

cc: Robert Lowenstein, Esquire Director, Office of Inspection and Enforcement (30)Director, Office of Management Information and Program Control (3)'7'll'0'/~0'EOPLE...

SERVING PEOPLE

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~"~ir~CONTROL 8LOCK: LICENSEE EVENT REPORT gP~SE PAINT ALL AEOUIAEO INFORMATION)

UCENSEE NAME,[op)FLsLsi o 7'9 14 15 UCENSE NUMBER 0-0 0 0 0 0-0 0 25 UCENSE TYPE EVENT TYPF I, 1 1 1 1~0 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCE[OO1jcoN'r

~~L L 7 8 57 58 59 60 EVENT DESCRIPTION Jog OOCKET NUMBER~EVENT OATE REPORT OATE 0 0-0 0 2 l 7 7 61 68 69 74 75 80 7 8 9 I circuit breaker for the"C" steam d iven aux ia fe d at r um e 7 89[OD4}circuit ad s etio f t e circu t show t d te m 7 8 9 Qg sensin a d control circuit.The s orted erminal was re i ed an thp 7 aa controller re laced.ee ao 80 80 ao I 7 8 9 SYSTEM CAUSE COOE COOE[007]LHHJ~B o 7 8 9 10 11 12 CAUSE DESCRIPTION Q~g he v v COMPONENT COOE K T B R K~A 17'3 b COMPONENT MANUFD~iFER W 2 lo 44 47 N 4a 80 7 8 9 toom tri ed due to a shorted terminal caused b moisture buildu in a control box.7 8 9~10 80 ao OTHER STATUS NA AMOUNT OF ACTIVITY NA 7 8 9 LOSS OR DAMAGE TO FACILITY TYPE OESCRIPTION

~16~Z, 7 89 10 PUBLICITY 7 89 FACIUTY STATUS.%POWER EE.L~J 7.8 9.10 12 13 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE KIH 7 8 9 10 11 PERSONNEL EXPOSURES , NUMBER TYPE OESCRIPTION

~~~oo o Lzj 7 8 9 11 12 13'EFISONNEL IN JURIFS Kl LZYJaJ PROBABLE CONSEQUENCES Q~g METHOO OF OISCOVERY 44 45 NA NA CISCOVERY OESCRIPTION LOCATION OF RELEASE NA ao ao ao 80 ao 7 8 9 ADDITIONAL FACTORS Q~I See a e two for continuation of Event Descri tion.7 89.ao 80 7 89 NAME.M.A.Scho man PHONE.305/552-3779 GPO 441 80 t REPORTABLE-OCCURRENCE 335-77-10 LICENSEE EVENT REPORT.PAGE T)'(0 EVENT DESCRIPTION (Continued)

During the time the"C" auxiliary feedwater pump was out of service, both electric-driven auxiliary feedvrater pumps were operable as required by Technical Specification 3.7.1.2.The"C" auxiliary feedwater pump was returned to'operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> as required by the Technical Specification.

This was the fifth reportable occurrence associated with the steam driven auxiliary feedwater pump.Two previous occurrences involved an open circuit in a solder joint (335-76-11) and a wiring diagram error (335-76-13) and are unrelated.

The other three occurrences (335-76-22, 335-76-36 and 335-7>6-47) are related in that they involve control circuit corrosion.

Action taken since the last reportable occurrence (335-76-47) has been the completion of jerouting of nearby steam drains away from the vicinity of the turbine.c)I Other means of long term corrective action are being studied.One possibility'~

under consideration to further correct the situation is to replace the+resent

~junction boxes and relocate them to a position off the turbine, making:<hem less susceptible to the effects of heat and moisture buildup.This will require a cold shutdown of the plant of sufficient duration to permit accomplishment.

(-335-77-10).

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