ML18110A707

LER 1976-003-00 for St. Lucie Unit 1, a Design Error in Engineered Safety Features Actuation System

ML18110A707
Person / Time
Site:	Saint Lucie
Issue date:	03/18/1976
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-76-54 LER 1976-003-00
Download: ML18110A707 (5)

Text

NRC FORM 195 U.S. NUCLEAR REGULATORY Co SSION DOCKET NUMBER, I2.76)

FILE NUMBER NRC DISTRIBUTlON FoR PART 50 DOCKET MATERIAL INCIDENT REPORT DATE OF DOCUMENT Mr Moseley Florida Pwr, &, Light Co 3-18-76 Miami, Fla A D Schmidt DATE RECEIVED 3-26-76

,gh.ETTER Q NOTOR IZ E D PROP INPUT FORM NUMBER OF COPIES RECEIVED OORIGINAL l5UNC LASS IF I E D

~CO< Y none signed DESCRIPTION ENCLOSURE Ltr trans the following: Reportable Occurrence ($ 76-3 on 3-8-76 concernin designeerror in engineered safety features ac-tuation system.....

~ACKiRVKSDGZD QQNOT ari,ivgrg I

PLANT NAME: St Lucie /Pl NOTE: IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J COLLINS SAFETY FOR ACTION/INFORMATION ENVIRO - 9<< 6 BRANCH CHIEF:

W 3 CYS FOR ACTION LIC ~ ASST:

W/ CYS ACRS 5 CYS ~DI-N&i ENT TO LA INTERNAL D IST RI BUTION NRC PDR ICE 2 SCHROEDER/IPPOLITO NOVAK CHECK TEDE CO CCA AER SHAO VOLLMER BUN KRE E 0 NS EXTERNAL DISTRIBUTION CONTROL NUMBER ~

LPDR: f9)

TIC NSIC NRC FORM IBS {2-76)

~ ~ ~ ~ ~

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FLORIDA POWER & LIGHT COMPANY March 18, 1976 t~gI)Lgogy DOI;I<D FiLE (,'OPY, PRN-LI-76-54

/

Mr. Norman C. Moseley, Director, Region II Office of Inspection and Enforcement c?Z U. S. Nuclear Regulatory Commission 230 Peachtree Street, N. W , Suite 818

'Atlanta, Georgia 30303,

Dear Mr. Moseley:

REPORTABLE OCCURRENCE 335-76-3 ST LUCIE UNIT 1 DATE OF OCCURRENCE: MARCH 8, 1976 DESIGN ERROR IN ENGINEERED SAFETY FEATURES ACTUATION SYSTEM

/

The attached Licensee Event Report is being submitted in accordance with Technical Specification 6.6.l.a to provide prompt notification of the subject occurrence.

Very truly yours, A. D. Schmidt.

Vice President ~//pe Power Resources 1 MAS/cpc Attachment cc: Jack R. Newman, Esquire .

Director, Office of Inspection and Enforcement (40)

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

HELPING B U I I. D FLORIDA

LlcENSEE EVENT REPORT CONTROL 8LOCK: (P E PAINT ALL REQUIRED INFORMATION) 6 UCENSEE LCENSE EVENT NAME UCENSE NUMBER TYPE TYPE P~g F L S L S 1 0 0 0 0 0 0 0 0 4 1 1 1 1 ~0011

~

7 89 14 15 zs aa 30 31 38 REPORT. REPORT CATMQRY TYPE SOURCE OOCKET NUMBER ~ EVENT OATE REPORT OATS

~I59 0 7

Qogcosi 8 57 58

~L 60 61 0 5 0 3 5 68 69 0 3 0 8 7 6 74 '5 0 3 1 8 7 6 ao EVENT DESCRIPTION

[GD~J Durin ereoaerational core loadi an enI.ineerin review by the FPL General Office 7 8 9 80

~03 E inc eri Staff indicated that upon loss of mower all ESFAS signals vrould go to the 7 8 9 80

~0 4 b ass mode whereas onl. the CSAS and RAS signals should do so. FSAR Section 7.3.1.4 7 8'9 80 Qg re uires that si nals other than CSAS and RAS go to the trip mode upon loss of povrer.

89 60

[oaf This is the first occurrence of this type. (335-76-3)..

7 8 9 ~ PRME 80 SYSTEM CAUSE COMPONENT CQOE CQOE COMPONENT COOE VCNATCN

,7 toalj ~IB 89 10

~B 11 18 I . N S I R U 17

~A st 44 C5 6 0 47 CAUSE OESCFIIPTION gg8 This occurrence vras caused b an ESFAS circuitr desi error. All ESFAS si als were 7 9 80 IDOI vs ~ p 7 8 9 f novrer. ircuit modifications are bei 80 Q~o made to corn@1 with FSAR Section 7.3.1.4 and vrill be completed before entering 7 89 METHOO OF 80 FACIJTY STATUS '%OWER OTHER STATUS OSCQVERY OSCOVERY OESCRPTION 7 8

~B 9

~00 O NA 44 c

45

'ngineering review of 46 ESF circuitry 10 1P 13 80 FORM OF ACTMTY COATENT RELEASEO OF RELEASE AMOUNT OF ACTMTY EH L>J L~J NA 7 s s 10 11 80 PERSONNEL EXPOSURES NUMBER TYPE OESCRIPT!ON Pg ~oo 7 89 o z NA 11 18 13 80 PERSONNEL INJUFIIES NUMBER OESCRlPTlON

~~4 ~00 0 7 89 11 18 PRO B~LE CONSEQUENCES

~15 NA 7 89 ao LOSS OR DAMAGE TO FACILITY TYPE OESCRtPTiQN

~z 7 89, 10 80 PUBLICITY

~17 NA 7 89 ~ 80 ADDITIONAL FACTOFIS" Qig ause Descriution Cont. Technical Soecification mode 4.

7 8 9 80 7 89 80 NAME.. A. 'Scho man PHONE: 305 552 3779 CF0 441 ~ 447