ML18110A891

LER 1977-016-00 for St. Lucie Unit 1, Low Steam Generator Pressure Trips Received on Channel a RPS and Channel a MSIS

ML18110A891
Person / Time
Site:	Saint Lucie
Issue date:	04/04/1977
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-77-98 LER 1977-016-00
Download: ML18110A891 (7)

Text

NRV'FORM J5<2.7G)U.S.NUCLEAR REGULATORV Co SSION DOC~T NUMBER'SO~BM NRC DISTRIBUTION FoR PART 50 DOCKET MATERIAL FILE NUMBER INCIDENT REPORT TO:.Mr.Norman C.Moseley Florida Power 6 Light Company Miami, Florida A~D~Schmidt.DATE OF DOCUMENT 4/4/77 DATE RECEIVED 4/18/77 ETTER CRRIGINAL Ocopv ONOTORIZED PRONCLASSIFIED I PLANT NAME:)~!ISt.Lucie Unit No.1 RJL DESCRIPTION Ltr, trans the following:

PROP (1-P)INPUT FORM NUMBER OF COPIES RECEIVED ENCLOSURE sE<~~(2-P)<m@@BSI Ig Jiff hHBf..NOTE: IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J, COLLINS Licensee Event Report (RO 50-335/77-16) on 3/5/77 concerning low steam gener'ator pressure trips being received on channel A RPS and channel A MSIS~~~~~~BRANCH CHIEF: 8 3 CYS FOR ACTION LICo ASST,: W CYS'CRS CYS S!%&INC S FOR ACTION/INFORMATION R iC~nrt NT EG RIL NRC PDR M6cE 2 MIPC SCHROEDER/IPPOLITO HOUSTON NOVAK/CHECK GRIMES CASE BUTLER HANAUER TEDESCO/MACCARY EISENHUT BAER SHAO VOLLMER/BUNCH KREGER/J COLLINS INTERNAL D R I BUTION IST LPDR0 TZC0 N E NAL DISTRIBUTION CONTROL NUMBER NRC FORM 196 (2 7GI PPJo go+5'f 4~Ivy 4 yg FLORIOA POWER&LIGHT COMPANY April 4, 1977-Px-77-PQ$

j;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:

REPORTABLE OCCURRENCE 335-77-16 ST.LUCIE UNIT 1 DATE OF OCCURRENCE:

MARCH 5, 1977 STEAM GENERATOR PRESSURE TRANSMITTER 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 it 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)>7mb'dA Y$I PEOPLE...SERVING PEOPLE

~-.e.~>~P'I P CONTROL 8LOCK LICENSEE EVENT REPORT~(PLEASE PRINT ALL RECIUIREO INFORMATION)

UCENSEE NAME 01 F L S L S 1 0.7 89 14 15 REPORT AEPOAT CATEGORY TYPE SOURCE I001]coN'T~~L L 7 8 57 58 59 60 EVENT DESCRIPTION Qg Durin Power 0 eration UCENSE EVENT~UCENSE NUMSER TYPE TYPE 0-0 0 0 0 0-0 0 A 1 1 1 1 L0OO3~I 25 26 30 31 32 OOCKET NUh18EA EVENT OATE REPORT OATE 0 5 0-0 3 3 5 0 3 0 5 7 7 0 3 1 6 7 7 61 68 69 74 75 , 8O low steam enerator'essure tri s were received on channel A 89 t003j RPS and channel A MSIS.Action was taken in accordance with Technical S ecifications 7 89~4..1 ion 2.and..2.1 action'.The affected channel A tri s were 8O 80 7 8 9 Qog 7 8 9 Jog 80 d o service in 1.25 hours2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br />.This was the fourth occurrence of an ino erable RPS 80 FAS channe.The revious occurrences were re orted as LER's 335-76-5 loss of 7 8 9 PAME SYSTEM CAUSE COMPONENT COOE COOE, COMPONENT COOE SUPPUER I007I~TA~E x x x x x x z 7 8 9 10 11 12 17 43 CAUSE OESCRIPTION I008 The fuse rotectin the DC ower su 1 for z 9 9 9 a7 N 48 steam enerator channel A ressure trans-80 7 8 9 Q~I mitter PT-8013A failed.The ower su 1 and'nstrument loo were checked for other 80 7 8 9 roblems and none were found.The fuse was re laced and the channel A tri 80 set oint was OTHER STATUS NA'7 89 LOSS OR OAMAGE TO FACIUTY TYPE OESCAIPTICN z 7 89 10 PUSLICITY 7 89 7 89 FACiUTY STATUS.1 POWER 0~g 0~O 7 8 9 10 12 13 FOAM OF ACTIVITY COATENT RELEASEO OF RELEASE AhIOUNT OF ACTIVITY KRI NA 7 8 9 10 11 PERSONNEL EXPOSURES NUMSER TYPE OFSCAIPTION Q~~]~(~0 z 7 8 9 11 12 13 PERS'ONNEL

!N JURIES OESCAIPTION

~~4 0 0 0 7 8 9 11 12 PROBABLE CONSEQUENCES Qg METHOO OF OISCOVEAY OISCOVEAY OESCAIPTION A NA 44 45 46 LOCATION OF RELEASE NA 44 45 NA NA NA NA NA 8O 80 80 60 80 80~80 AOOITIONAL FACTORS Q~g See a e two for continuation of Event Descri tion and Cause Description.

,7 89 80 7 89 NAME M.A.Scho man PHONEI 305/552-3779 80 CPO IISI 6IIT LICENSEE EVENT REPORT REPORTABLE OCCURRENCE 335-77-16 PAGE TWO EVENT DESCRIPTION (Continued) power caused by loose electrical connections), 335-76-17 (ESFAS setpoint drift), and 335-76-26 (loss of power due to 1C inverter failure).This occurrence was not related to the previous occurrences.

(335-77-16).

CAUSE DESCRIPTION (Continued)

Verified.

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