ML18113A342

LER 1976-025-00 for St. Lucie Unit 1, During Preoperational Testing, Regulating Rod 59 Was Immovable Because Associated CEA Module Had Malfunctioned

ML18113A342
Person / Time
Site:	Saint Lucie
Issue date:	06/25/1976
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-76-161 LER 1976-025-00
Download: ML18113A342 (7)

Text

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~ NBC 5ISTRIBUTION Fo<<PART ~0 DOC!(ET MATERIAL rILG IIUMIII:.n XNC)'DIrhT RIzPOR'i'nTG i fO: Mr..'Norman C~ Moseley FI3OM: FPL OF DOCUMGNT Miamy, Pla. 6-25-76 A,D, 'Schmidt DnTG AFCFIVGD 7-8-76 iXLGTTGR 0 NO TO A fZG 0 PROP INPUT FOAM NUMOGA OF COPIGS ALCGIVGD 6 OA IO INAL gUNCLnSSIF IGD bI COP Y

'" "" "'" '" Ltr trans the following: Licensee Event Report 76-25 on 5 25 76 refa failure of Regulating Rod 59 being immovab i because of the CEA module had malfunctioned.

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X'LANT )~tAME: St. Lucie Unit 1 NOTE: XP PEI'SONNEL EXPOSIT XS XNVO VED SEND DXRECTLY TO KREGER/J. COLLXNS SA!rETY FOR ACTION/INFOliiYiA'f ION ENVXRO DHL 7 10-76

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P.O. BOX 013100, MIAMI, FLORIDA 33101 FLORIDA POWER SI LIGHT COMPANY geguleto Docile( .ile PRN-LI-76-161 Mr. Norman C. Moseley, Director, Region II (

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Office of Inspection and Enforcement 7 7 U. S. Nuclear Regulatory Commission f 230 Peachtree Street, N. W., Suite 818 I If Atlanta, Georgia 30303 ) ~

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Dear Mr. Moseley:

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REPORTABLE OCCURRENCE 335-76-25 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: MAY 25, 1976 CEA MODULE FOR REGULATING ROD 59 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 ~Q Vice President p(

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Attachment CC Jack R. Newman, Esquire Director, Office of Inspection and Enforcement (30)

Director, Office of Management Information and Program Control (3) 6835 HELPING B VILD FLORIDA

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= PRINT ALL REQUIRED INFQRMATION3 EVENT NAME UCENSE NUMBER TYPE TYPE 01 F S L S 1 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~03

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14 15 25" 26 30 31 32 7

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. CATEGORY 57 58 REPQAT TYPE L

59 REPORT SOURCE

~L 60 61 0 5 OOCKET NUMBER 0 0 3 3 5 68 69 052576062576 EVENT OATS 74 75 AEPOAT OATE BQ EVENT DESCRIPTION 7 8 9 reo erational

'in testin , it was found that Regulating Rod 59 was 80 immovable because the associated CEA module had malfunctioned; The mal-7 7

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89 8 9 8 9 89 however the rod was

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still tri the rod was restored to the o erable status in one hour and fifteen SYSTEM CAUSE em from bein able to able. The CEA module was replaced and COMPONENT move the rod 80 80 80 BO COOK COO E COMPONENT COOE MANUFACTURER

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'2 C R 0 R V E ~N C 4 9 0 N 7 8 9 10 , 11 17 43 44 47 CAUSE OESCRIPTIQN gg8 The manufacturer's test re ort indicated that, two integrated circuit 7 9 corn onents used in the raise/lower circuit of the module had failed.

7 8 9 80 I This caused a low volta e condition which prevented the module from 7 89 ll]8' 7

FACUTY STATUS uB FORM QF

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12 13 OTHER STATUS N A 44 METHOO OF OISCOVEAY 45 46 OISCOVKAY OESCRIPTION N/A ACTIVITY CQ IIITENT AELEASEO OF AELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE Q72 Z ~Z N/A N/A

,7 9 9 10 11 BO PERSONNEL EXPOSURES NUMBER TYPE OESCRIPTIQN

~SO ~OO O ~Z N/A 7 8 9 11 12 13 PERSONNEL INJURIES OESCRIPRQN I?4I o o o N A 7 8 9 11 12 PROBABLE CONSEQUENCES t11I N A 7 89 80 LOSS QR OAMAGE TQ FACILITY TYPE OESCRKOTION N A

,7 89 10 80 PUBLICITY i@7 8 9 AOOITIQNAL FACTORS

'l See page 2 for continuation of Event Description and Cause Description'.

80 I 80 N. A. Scho man CFO 441 ~ 447

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REPORTABLE OCCURRENCE 335-76-25 LICENSEE EVENT REPORT PAGE TWO Event Descri tion (Continued) minutes. The faulty module was returned to the manufacturer for testing and repair. This was the first, occurrence of this type.

(335-76-25).

Cause Descri tion (Continued) operating. The failed components were replaced after which the module functioned satisfactorily.

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