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

DOC~T NUMBER NRV'FORM

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J5 U.S. NUCLEAR REGULATORV Co SSION

'SO~BM FILE NUMBER NRC DISTRIBUTION FoR PART 50 DOCKET MATERIAL INCIDENT REPORT TO: . DATE OF DOCUMENT Florida Power 6 Light Company 4/4/77 Miami, Florida Mr. Norman C. Moseley A~ D~ Schmidt.

DATE RECEIVED 4/18/77 ETTER ONOTORIZED PROP INPUT FORM NUMBER OF COPIES RECEIVED CRRIGINAL Ocopv PRONCLASSIFIED ENCLOSURE sE<~~

DESCRIPTION Ltr, trans the following: 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 ~ ~ ~ ~ ~ ~

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PLANT NAME: (1-P) (2-P)

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ISt. Lucie Unit No. 1 Ig Jiff hHBf..

RJL NOTE: IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J, COLLINS FOR ACTION/INFORMATION BRANCH CHIEF: R iC~nrt 8 3 CYS FOR ACTION LICo ASST,:

W CYS'CRS CYS S!%&INC S NT INTERNAL D IST R I BUTION 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 E NAL DISTRIBUTION CONTROL NUMBER LPDR0 TZC0 N

PPJo go+ 5'f NRC FORM 196 (2 7GI

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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)

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I PEOPLE... SERVING PEOPLE

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LICENSEE EVENT REPORT CONTROL 8LOCK

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(PLEASE PRINT ALL RECIUIREO INFORMATION)

UCENSEE UCENSE EVENT ~

NAME UCENSE NUMSER TYPE TYPE 01 F L S L S 1 0 0 0 0 0 0 0 0 0 A 1 1 1 1 L0OO3~I

.7 89

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14 15 25 26 30 31 32 REPORT AEPOAT CATEGORY TYPE SOURCE OOCKET NUh18EA EVENT OATE REPORT OATE I001] coN'T ~L L 0 5 0 0 3 3 5 0 3 0 5 7 7 0 3 1 6 7 7 7 8 57 58 59 60 61 68 69 74 75 , 8O EVENT DESCRIPTION Qg Durin 89 Power 0 eration low steam enerator 'essure tri s were received on channel A 8O t003j RPS and channel A MSIS. Action was taken in accordance with Technical S ecifications 7 89 80

~4 7 8 9

. .1 ion 2. and . .2.1 action' . The affected channel A tri s were 80 Qog 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 7 8 9 80 Jog FAS channe . The revious occurrences were re orted as LER's 335-76-5 loss of 7 8 9 PAME 80 SYSTEM CAUSE COMPONENT COOE COOE, COMPONENT COOE SUPPUER I007I ~TA ~E x x x x x x z z 9 9 9 N 7 8 9 10 11 12 17 43 a7 48 CAUSE OESCRIPTION I008 The fuse rotectin the DC ower su 1 for steam enerator channel A ressure trans-7 8 9 80 7

Q~ I8 9 mitter PT-8013A failed. The ower su 1 and'nstrument loo were checked for other 80 7 89 roblems and none were found. The fuse was re laced and the channel A tri set oint was FACiUTY 8O METHOO OF STATUS .1 POWER OTHER STATUS OISCOVEAY OISCOVEAY OESCAIPTION 0~g 0 ~O NA A NA 7 8 9 10 12 13 44 45 46 80 FOAM OF ACTIVITY COATENT RELEASEO OF RELEASE AhIOUNT OF ACTIVITY LOCATION OF RELEASE KRI NA NA 7 8 9 10 11 44 45 PERSONNEL EXPOSURES NUMSER TYPE OFSCAIPTION 7

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8 9

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12 13 NA 80 PERS'ONNEL !NJURIES OESCAIPTION

~~4 0 0 0 NA 7 8 9 11 12 60 PROBABLE CONSEQUENCES Qg NA

'7 89 80 LOSS OR OAMAGE TO FACIUTY TYPE OESCAIPTICN z NA 7 89 10 80 PUSLICITY NA 7 89 ~ 80 AOOITIONAL FACTORS Q~ g See a e two for continuation of Event Descri tion and Cause Description.

,7 89 80 7 89 80 NAME M. A. Scho man 305/552-3779 PHONEI 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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