ML18110A881

LER 1977-335-23 for St. Lucie, Unit 1 on RCS Flow

ML18110A881
Person / Time
Site:	Saint Lucie
Issue date:	05/13/1977
From:	Schmidt A D Florida Power & Light Co
To:	Moseley N C NRC/IE, NRC/RGN-II
References
LER 1977-335-23
Download: ML18110A881 (8)

Text

NRC FO'iM 195 (2.78)s.,~, NRC DISTRIBUTION FQR PART 50 DO U.S.NUCLEAR REGULATORY COMMiSSION CKET MATERIAL DOCKET NUMBER FILE NUMBER INCIDENT REPORT TO'.C MOSELEY FRONI: FLORDIA POWER&LIGHT CO.MIAMI," FLORDIA A.D.SCHMIDT.DATE OF DOCUMENT.DATE RECEIVED GI.ETTE R&ORIGINAL 0 COPY ONOTOR IZED Cf UNCLASSIFIED PROP INPUT FORMNUMBER OF COPIES RECEIVED DES C RIP T I 0 N LTR TRANS THE FOLLOWING..

'.......~'1P)ENCLOSURE LICENSEE EVENT REPORT FOR R.O./f 77-g3, ON 4/15/77 CONCERNING THE CONTAINMENT-INSTRUMENT A'IR)SYSTEM JAILING..'...'

~tt K (2P)IPP gOr RZMOVS'ST.LUCIE 8 1 ('AB<ACKWOWr,ZDGF.O NOTE.IF PERSONNEL EXPOSURE IS INVOLVED~SEND DIRECTLY TO KREGER/J, COLLINS BRANCH CHIEF: W 3 CYS FOR ACTION LIC ASSTo: W/CYS ACRS CYS FOR ACTION/INFORMATION INTERNAL D IST Rl BUTION NRC PDR I&E(2 MIPC SCHROEDER/IPPOLITO HOUSTON NOVAK/CHECK GRIMES BUTLER HANAUER TEDESCO/MACCARY EISENHUT BAER SHAO VOLLMER/BUNCH KREGER/J COLLINS LPDR: TIC: N~EXTERNAL DISTRIBUTION CONTROL NUMBER NRC FORM)98 I2.78) pP I I\" I I h J 1 FLORIDA POWER&LIGHT COMPANY SZ)-isa May 13, 1977 PRBI-LI-77-147 gggg~mg 90Gt(G FIK@5 Mr.Norman C.Moseley, Director, Region Office of Inspection and Enforcement, U.S.Nuclear Regulatory Commission 230 Peachtree Street, N.W., Suite 1217 Atlanta, Georgia 30303

Dear Mr.Moseley:

8 Afcfivfl3 JUX ZS tg77 N>h HUQEAR RE~zyg, l5fl REPORTABLE OCCURRENCE 335-77-23 ST.LUCIE UNIT 1 DATE OF OCCURRENCE APRIL 15i 1977 RCS FLOW 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.chmidt 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)7i6SOg22 PEOPLE...SERVING PEOPLE 4 f'4'V I CONTROL BLOCK: J 1 ucENsEE NAME F L S L S 1 0 0 7 89 14 15 LICENSE NUMBER 0 0 0 0 INCENSE EVENT TYPE TYPE 0 4 1 1 1 1~0 25, 26 30 31 32 CENSEE EVENT REPORT (PL SE PRINT ALL REQUIRED INFORMATION)

REPORT REPORT CATEGORY TYPE SOURCE~OOCKET NUMBER EVENT OATE REPORT OATE~01 CON'T~~L~L 0 5 0-0 5 5 5 0 4 7 8 57 58 59 60 61 68 69 74 75 80 EVENT OESCRIPTION

~0 2 Durin normal lant o erations the Containment Instrument Air S stem failed causin los 89 80 gg of control of all air-o crated valves in the containment.

This result d in the loss of 7 8 9[00~]seal coolin water to the Reactor Coolant Pum s.80 The Reactor was tri ed and Reactor 7 8 9 80 Qg o an P m s were secured'.Air ressure was restored to he containmen

-'7 8 9 Jog 7 8 9 80 80 PRME COMPONENT SUPPUER SYSTEM CAUSE COOE COOS COMPONENT COOE~PA~E B I 0 W E R~A 7 8 9 10 11 12 17 43 CAUSE OESCRIPTION

~08 o COMPONENT MANUFACTURER N 0 1 0 N 44 47 48 n inm i trument air c 80 ir o sta ed b due o h er i air so'.ha e ressor faile d 0 f e 7 8 9 7 8 9 80 Q~g check valve stickin o en air from the backu corn ressor blew back throu h the failed OTHER STATUS NA AVIOUNT OF ACTIVITY NA 7 89 FACILITY STATUS'%OWER LEJ~0 7 8 9 10 12 13 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE EH L~J L~J 7 8 9 10 11 PERSONNEL EXPOSURES NUMBER TYPE 4 OESCRIPTION

~oo~z 7 8 9 11 12 13 PERSONNEL INJURIES NUMBER OESCRIPTION

~14 L00~0 7 89 11 12 PROBABLE CONSEQUENCES

'~g METHOO OF OISCOVERY 44 45 46 NA NA NA OSCOVERY OESCRIPTION

.NA LOCATION OF RELEASE NA 80 80 60 80 60 7 8 9 LOSS OR OAMAGE TO FACILITY TYPE OESCRIPTION L Loss of use of facilit 7 89 10 PUBLICITY~17 7 8 9 durin re lacement of RCP seals.NA 60 80 60 ADDITIONAL FACTORS Qg See a e 2 for continuation of Event Descri tion and Cause Descri tion.7 89 A Qg 7 89 80 80 NAME M.A.Scho man PHONE 305 552-3802 GPO IIdI~III' S Jr'li.~lf<z A(>3$3&i REPORTABLE OCCURRENCE REPORT 335-77-23 LICENSEE EVENT REPORT PAGE TWO EVENT DESCRIPTION (Continued) plant management decided not to restar't the RCP's.The unit was borated to cold shutdown conditions and plant cooldown was made using natural circulation.

The plant was placed on Shutdown Cooling in ten hours.This is being reported under Technical Specification 3.4.3..This was the first occurrence of loss of RCS flow under hot conditions.

(335-77-23).

CAUSE DESCRIPTION (Continued) compressor.

Subsequent corrective actions were: (1)to perform complete checkouts on the two compressors, (2)add new discharge check valves, and (3)add a modification to allow turbine building instrument air to auto-matically backup containment instrument air.

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