ML18113A292

LER 1976-047-00 for St. Lucie, Unit 1, Steam Driven Auxiliary Feedwater Pump Would Not Start Because Trip Solenoid Latch Failed to Engage

ML18113A292
Person / Time
Site:	Saint Lucie
Issue date:	01/07/1977
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-77-8 LER 1976-047-00
Download: ML18113A292 (7)

Text

U.S. NUCLEAR REGULATORY COMMI~ N DOCKET NUMBER NRC FORM 195 50-335 I2.76)

FILE NUMBER NRC Dl'a I RIBUTION FDA PART 50 DOCKET MATERIAL INCIDENT REPORT LIGHT CO. DATE OF DOCUMENT TP. N.C. MOSELEY FROM: FEORDIA POWER &

MIAMI, FL. 1 7 77 A.D.SCHMIDT DATE RECEIVED 1 25 77 Cl NOTOR l2 E D PROP INPUT FOAM NUMBER OF COPIES RECEIVED OLETTg R RIOR IGINAL HUNG LASS IF I E D

-~COPY DESCRIPTION ENCLOSURE LTR. TRANS THE FOLLOWING....... EVENT REPORT FOR. R.O. f/ 76/47, ON J'ICENSEES 12/8/76 COO]CERNING THE STEAN DRIVEN AUXILIARY FEEDWATER PUMP NOT'TARTING ',

(1 SIGNED CY. RECEIVED) '

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Po Nor a,Rxoxg PLANT NAME: ST. LUCIE // 1 ACKNOWLEDGE NOTE: IF PERSONNEL EXPOSURE IS INVOLVED

'END DIRECTLY TO KREGER/Jo COLLINS FOR ACTION/INFORMATION SAB 1 31 77 BRANCH CHIEF!

- W 3 CYS FOR ACTION LI LIC, ASSTo! "DIGGS W

CYS ACRS 16 CYS INTERNAL D ISTRI BUTION EG FI NRC PDR MIPC SCHROEDER/IPPOLITO

-HOUSTON NOVAK/CHECK GRIMES CASE BUTLER HANAUER TEDESCO/MACCARY EISENHUT BAER SHAO VOLLMER/BUNCH KREGER/J COLLINS EXTERNAL DISTRIBUTION CONTROL NUMBER LPDR! F L.

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. BOX 013100, MIAMI, FL 33101 figq c~y, I/g gpss ctot:"..ciEO USN FLORIDA POWER & LIGHT COMPANY CletI.'anuary Photl Section Itoctntt PRN-LI-77 7, 1977 Mr. Norman C. Moseley, Director, Region II Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 230 Peachtree Street, N. N., Suite 1217 Atlanta, Georgia 30303., 1

Dear Mr. Moseley:

REPORTABLE OCCURRENCE 335-76-47 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: DECEMBER 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 occurrence.

Very truly yours, D. c idt 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)

PEOPLE... SERVING PEOPLE

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PENSEE EVENT REPORT CO(hITROL BLOCK: /PLE PRINT ALL REOUIRED INFORMATION) 6 ea%t INCENSE LICENSE EVENT NAME UCENSE NUh'IBER TYPE TYPE

[eel] 0 L S L S 1 0 0 0 0 0 0 0 0 0. 4 1 1 1 1 ~03

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14 15 25 26 30 31 32 AEPQA! REPOAT 7

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CATEGORY 57 58 TYPE 59 SOURCE 60 0 5 OOCKET NUMBER 0 0 3 3[5 68 69 l 2 EVENT OATE 0 8 .7 6 74 75 0 l REPORT DATE 0 7 7 7 80 EVENT DESCRIPTION tOOIEc P '1'ar f p water umo wou]d not start because the tri as 80

~0(3 solenoid latch failed to en a e. U on ins ection, 'a moisture induced as corrosion de osit was found on the latch mechanism. 'he mechanism was 80

~QI4 7 8 9 OQ

~Qf-'leaned and lubricated and the um was tested satisfactoril in all 7 8 9 eQ

~c.'= I modes of o erat:ion. This was the third occurrence durin (rhich the steam 7 8 9 PFfM E 80 SYSTEM CAUSc COMPO NB(T CCMPCNB4T CQQE CQQc COMPONENT CQQE 'UFPUER MANUFACTUFM VIQLAMiN

~HH ~0 V A L V~EX ~A L 2 0 0 9 10 11 12 17 43 48 CAUSE DESCRIPTIQiiI The steam driven auxiliar feedwater um did not start because of moistur 7 8 S eo b i u 1 n a coll ting) lbox. The moisture caused corrosion of. the tri 7 8 9 80 solenoid latch mechanism which revented the latch from en a in 7 89 FAC~ hIETHQO CF eo STATUS Y POWER OTHER STATUS OISCOVcAY OISCOVcAY QE>CAIPTIQN gjg 0 ~oo o L H/A N/A 7 6 9 10 12 (3 44 45 46 60

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FOAM OF ACTNITY COATENT RELcEASEQ OF RELEASE >AIQUtIT QF ACTiVITY LOCATION QF RELEASE

~1)2 Z N/A 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBFR TYPE OESCilkc~N

~OI O 0 7 8 9 11 12 13 PERSQ((NEL INJL'RES NUMBER 'ESCAIPTIQN

~oo o N/A 7 8 9 11 12 OQ PqOB~LZ CONS CUE(ICES 7 8 9 LOSS CR DAMAGE TO FACILITY TYPE OESCR!PTICN Z

7 8 9 10 F'SLICITY N/A 7 6 S ADDITIONAL FACTORS t.""-

l"-l See Pa e Two for continuation of, Event Descri tion.

7 8 9 60 7 69 80 hl. A. Scho man PHON ~ (305) 552 3779 G$ '0 001 ~ 0 0 7

Reportable Occurrence 335-76-47 Xicensee Event Report Page Two Event Descri tion (Continued) driven auxiliary feedwater pump failed to start because of moisture buildup (see reports 335-76-22 and 335-76-36). Xn addition to, further sealing of the pump control circuitry, nearby steam drains have been rerouted away from the circuitry in order to remove the source of the moisture. A plant change, in accordance with 10 CFR 50.59, has been generated to modify the control circuit so that the trip solenoid will remain in the latched position follow-ing a pump stop. This should eliminate starting failures related to the trip latch failing to engage (see report 335-76-36). Also, surveillance testing has been increased to help ensure proper operation of the steam driven auxiliary feedwater pump.

(335-76-47)

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