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 Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-77-72 LER 1977-010-00
Download: ML18110A897 (7)

Text

3 U.S. NUCLL'AA REGULATORY COMMISSION DOCKET,NUMOLA NIIC Fo<<M.195 I2 76$

l Wo- z zw FILE NUMAEA NRC DISTRIBUTION roA= RT 50 DO Cl(ET MATERIAL INCIDENT REPORT TO: FROM: DATE OF DOCUMENT Florida Power 5 Light Company 3/18/77 Mr. Norman C. Moseley Miami, Florida DATE RECEIVED A~ Di Schmidt 4/1/77 LETTER ONOTORIZEO PAOP INPUT FOAM NUMOEA OF COPIES AECEIVED gOAIOINAL RFUNC LASS IF I E D Hcor Y DESCAIPTION ENCLOSURE

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Ltr trans the following: 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 RCKNOWX,EDGED feedwater pump steam valve cdntrol circuit tripped. ~ ~ ~ ~ ~

PLANT NAME:

St. Luciq Unit No, 1 (1-P) (2-P ) ~

RJL XF PERSOKKL EXPOSURE XS INVOLVED

,LIO NOT REMOVL('OTE: SEND DIRECTLY TO KREGER/J, COLLINS FOR ACTION/INFORMATION TI3 BRANCH CHIEF: Ch A 8 3 CYS FOR ACTION LXCo ASST,:

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,INTERNAL D I STR I BUTION

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~EcM (2) 3 MIPC SCHROEDER/IPPOLXTO HOUSTON NOVAK/CHECK GRDIE S CASE BUTLER HANAUER TEDESCO/MACCARY EXSENHUT BAER SHAO VOLLMER/BUNCH KREGER/J COLLINS EXTERNAL DISTRIBUTION CONTRSL NUMI3ER LPDR4 ~

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f Qllg FLORIDA POWER 8( LIGHT COMPANY March 18, 1977 PRN-LI-77-72 Mr. Norman C. Moseley, Director, Region Office of Inspection and Enforcement A l."il fmph 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)

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LICENSEE EVENT REPORT

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CONTROL 8LOCK: gP ~SE PAINT ALL AEOUIAEO INFORMATION)

UCENSEE UCENSE

[op) FLsLsi EVENT NAME, UCENSE NUMBER TYPE TYPF 0 0 7'9 o 0 0 0 0 0 0 I, 1 1 1 1 ~0

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

[OO1jcoN'r ~L L 0 0 0 0 2 l 7 7 7 8 57 58 59 60 61 68 69 74 75 80 I

EVENT DESCRIPTION Jog 7 8 9 ao circuit breaker for the "C" steam d iven aux ia fe d at r um e 7 89 80 7

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8 9 circuit ad s etio ft e circu t show t d te m 80 7

Qg aa sensin a d control circuit. The s orted erminal was re i ed an thp ee ao controller re laced. I 7 8 9 80 SYSTEM CAUSE COMPONENT COOE COOE COMPONENT COOE MANUFD~iFER

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7 8 9 10 LHHJ CAUSE DESCRIPTION

~B 11 12 o K T B R K 17 '3~A 44 W 2 lo 47 N

4a Q~g he v v b 7 8 9 80 toom 7 8 9 tri ed due to a shorted terminal caused b moisture buildu in a control box.

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~10 7 89 FACIUTY METHOO OF STATUS .  % POWER OTHER STATUS OISCOVERY CISCOVERY OESCRIPTION EE . L~J NA

7. 8 9 . 10 12 13 ao FORM OF ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE KIH NA NA 7 8 9 10 11 44 45 PERSONNEL EXPOSURES

, NUMBER TYPE OESCRIPTION

~~ ~oo o Lzj 7 8 9 11 12 ao INJURIFS 13'EFISONNEL Kl LZYJaJ NA ao PROBABLE CONSEQUENCES Q~g NA 7 8 9 80 LOSS OR DAMAGE TO FACILITY TYPE OESCRIPTION

~16 ~Z, 7 89 10 ao PUBLICITY 7 8 9 .ao ADDITIONAL FACTORS 7

Q~ I89 See a e two for continuation of Event Descri tion.

80 7 89 80 NAME. M. A. Scho man PHONE. 305/552-3779 GPO 441

REPORTABLE- OCCURRENCE t

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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