ML18113A319

LER 1976-036-00 for St. Lucie Unit 1, Steam Driven Auxiliary Feedwater Pump Would Not Start Because Steam Supply Valve Would Not Open Fully

ML18113A319
Person / Time
Site:	Saint Lucie
Issue date:	08/09/1976
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-76-203 LER 1976-036-00
Download: ML18113A319 (12)

Text

NIIC FOIIM 'l96 ,U.Sl NUCLEAR REOUI ATORY COMMISSION DOCKET NUMBER I2 76) 50-335 r

FILE NUMOER NRC DISTRIBUTION FoR PART 50 DOCKET MATERIAL INCIDENT REPORT TO: FROM: DATE OF DOCUMENT Florida Power & Light Company 8/9/76 v Miami, Florida DATE RLCEIVED Mr. Norman C. Moseley A. D, Schmi.dt 8/19/76 QNOTORIZED PROP INPUT FORM NUMBER OF COPIES RECEIVED PILE TTEIR0 IN I One signed copy CI OR A PlJNC LASSIF IED COP Y DESCRIPTION ENCLOSURE Ltr, trans the following: Li,censee Event Report (RO 50-335-76-36) on 7/9/76 concerning the steam driven auxiliary feedwater pump not starting because the steam supply valve would not open fully.

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PLANT NOTE: IF PERSONNEL EXPOSURE IS INVOLVED NAME't, SEND DIRECTLY TO KREGER/J, . COLLINS Lucie fkl FOR ACTION/INFORMATION 8 19 76 BRANCH CHIEF: Ziemann W CYS R)R ACTION LIC.. ASST.: Di gs W CYS ACRS CYS HOLDING S TO LA INTERNAL D I ST R I BU TI ON REG FI PDR IREE 2 SCHROEDER IPPOLITO HOUSTON NOVAK CHECK GRIMES ~ PtM t t ttl Nt CASE > -.t~

HANAUER TEDESCO MACCARY EISENHUT SHAO UOLLMER EJNCH KREGER J. COLLINS EXTERNAL DISTRIBUTION CONTROL NUMBER LPDR: Ft Pier e Fla TIC:

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FLORIOA POWER Ei LIGHT COMPANY August .9, 1976 6-203

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'R'egu1atory Docket File Qa%c ~~<~10II

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Mr. Norman C. Moseley, Director, Region II Office of Inspection*and Enforcement U. S. Nuclear Regulatory Commission 230 Peachtree Street, N. N., Suite 818 Atlanta, Georgia 30303

Dear Mr. Moseley:

REPORTABLE OCCURRENCE 335-76-36 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: JULY 9, 1976 STEAM DRIVEN AUXILIARY FEEDNATER 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, A. D. c idt Vice President Power Resources MAS/bfp Attachment cc: Jack R. Newman, Escgxire Director, Office of Inspection and Enforcement (30)

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

HELPING BUILD FLOPIIOA

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CONTROL BLOCK: SE PAINT ALL REOUIAED INFORMATION) 1 6 UCENSEE UCENSE EVENT BLAME UCENSE NUMBER TYPE TYPE loop F L S L S 1 0 0 p 0 0 0 0 0 0 4 1 1 1 1 ~0

.7 89 14 15 25 26 30 31 32

,REPORT, REPORT

. CATEGORY TYPE SOURCE OOCKET NUMBER EVENT OATE REPORT OATE

~01CONl~, L L 0 5 0 0 3 3 5 0 7 0 9 7 6 0 8 0 9 7 6 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION

~0 2 On Jul 9, the steam driven auxiliary feedwater pump would not start 7 8 9 80 Qg because the steam su 1 valve would not o en full . Upon inspection, 7 89 80

. Jog 1 the control circuitr . The moisture'..

7 8(9 80 boas] was concentrated mainly near the solenoid for the trip and throttle 7 8 9

[oa~j 'r it was dried and the um was 7 8 9 R&tE 80 SYSTEM CAUSE COMPONENT COMPONENT 7

~07 8

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9,10 EOOE COOE

~B 11 12 COMPONENT COOE A L E X 17 SUPPLER A L MANUFACIUAQl 2 0 0 47 N

48 CAUSE DESCRIPTION gQB The steam driven auxiliar feedwater um did not start because of a 89 80 Qg moisture buildu in the control circuit-for the trip and'hrottle 7 8 9 60

~10 valve.

7 89 FA~ METHOO OF 80 7

Qg 8 9

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STATUS FORM OF Loaoog 10 POWER 12 13 OTHER STATUS N A 44 OISCOVERY 45 46 OISCOVERY OESCRIPTION N A eo ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE 7 9 . 9 Lzl hJ 10 11 N A 44 45 N A 80

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PERSONNEL EXPOSURES EH hJ hJ N A 7 89 11 12 13 80 PERS'ONNEL INJURIES

~i4 7 89 Q~iJJJ N A 11 12 80 PRPP~T g CONSEQUENCES

[115]

,7 89 80 LOSS OR DAMAGE TO FACILITY TYPE OESCRIPTION

~z N/A 7 89 10 80 PUBUCITY N/A 7 8 9 ~ 80 ADDITIONAL FACTORS'g 7

See a e two for continuation of Event Description.

l 8 9 80 7 89 80 NAME: M. A. Schoppman PHONE CFO S~1

REPORTABLE OCCURRENCE 335-76-36 ZgXCENSEE EVENT REPORT

'AGE TWO satisfactorily tested several times. On July 17, the pump again would not start due to moisture buildup in the control circuitry.

This time the affected circuitry was dried and sealed and the pump was satisfactorily tested.

This was the fourth reportable occurrence at St. Lucie Unit 1 related to malfunction of the steam driven auxiliary feedwater pump. The previous occurrences were an open solder joint in the overspeed governor circuitry (335-76-11), a control wiring dia-gram error (335-76-13), and a corroded lug in the overspeed trip circuitry (335-76-22). Of these previous occurrences, only LER 335-76-22 is considered to be related with respect to cause to the occurrence described in the present,.report,.

(335-76-36)'

FLORIDA POWER B> LIGHT COMPANY August 9, 1976 PRN-LX-76-203 Mr. Norman C. Moseley, Director, Region XI Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 230 Peachtree, Street, N. W., Suite 818 Atlanta, Georgia 30303

Dear Mr. Moseley:

REPORTABLE OCCURRENCE 335-76-36 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: JULY 9, 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, A. D. c midt Vice President Power Resources MAS/bfp Attachment cc: Jack R. Newman, Esquire Director, Office of Inspection and Enforcement (30)

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

HELPING BUILD FLOR I DA

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LICENSEE EVENT REPORT CONTROL BLOCK: t'PLEASE PRINT ALL REQUIRED INFORIVIATION) 1 UCENSEE LICENSE EVENT NAME UCENSE NUMBER TYPE TYPE

[oD~] F L S L S 1 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~03

.7 89

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14 15 25 26 30 31 32 REPORT REPORT

, CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT DATE

[001I CON'7 L ~L 0 5 0 0 3 3 5 0 7 0 9 7 6 0 8 0 9 7 6 7 8 57 58 59 60 61 68 69 74 75 80 I

EVENT DESCRIPTION I

Qo2 On Jul 9, the steam driven auxiliary feedwater pump would not start 7 8 9 7 89 because the steam su l valve would not o en full . Upon inspection, 80 80 7

QO74 8 9 rt, f he control circuitr . The moisture Qo 7

I8 9 was concentrated mainly near the solenoid for the trip and throttle 80 7

[oats) 8 9 PRtAE itr was dr'ied and the um was 80 80 SYSTEM CAUSE COMPONENT COMPONENT COMPONENT CODE SUPPLER MANUFACTURER 7

IH8 9iaLd 10 L~J 11 , 12 A L E X 17 A

43 44 L 2 0 0 47 N

48 CAUSE OESCRIPTION gg8 The steam driven auxiliar feedwater um did not start because of a 7 9 80 Qg moisture buildu in the control circuit for the trip and throttle 7 89 80

~10 valve.

7 89 80 FACSflY METHOD OF STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION HE 7 8 9 IzJ LoaooJ N A N A 10 12 13 44 45 46 80 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE KRI N A N A 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES 7

ERR' 89 11 hJ 12 13 N A 80 PERSONNEL INJURIES NUMBER DESCRIPTION N A 7 8 9 11 12 80 PROBABLE CONSEQUENCES

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7 8 9 80 LOSS OR OAMAGE TO FACILITY TYPE DESCRIPTION

~z N/A 7 89 10 PUBLICITY N/A 7 8 9 .80 AOOITIONAL FACTORS See a e two for continuation of Event Description.

7 8 9 80 7 89 NAME'. A. Schoppman PHONEI305/552 GPO Slf o 80 007

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REPORTABLE OCCURRENCE 335-76-36 LICENSEE EVENT REPORT PAGE TWO satisfactorily tested several times. On July 17, the pump again would not start due to moisture buildup in the'control circuitry.

This time the affected circuitry was dried and sealed and the pump was satisfactorily tested.

This was the fourth reportable occurrence 'at St. Lucie Unit 1 related to malfunction of the steam driven auxiliary feedwater pump. The previous occurrences were an open solder joint in the overspeed governor circuitry (335-76-11), a control wiring dia-gram error (335-76-13), and a corroded lug in the overspeed trip circuitry (335-76-22). Of these previous occurrences, only LER 335-'76-22 is considered to be related with respect. to cause to the occurrence described in the present report.

(335-76-36)

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