ML18113A345

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

ML18113A345
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: ML18113A345 (7)

Text

NRC FoRM 195 U,S. NUCLEAR REGULATORY COMMISSION DOCKET NUMBER

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5'6- 334

~ $

FILE NUMOEfl NRC DISTRIBUTION FoR ~tART 60 DOCKET MATERIAL INCIDI'.NT REPORT DATE OF DOCUMENT

'Mr Moseley 'lorida.&ower & Right Co 6-25-76 Miami,. Fpa A D Schnidt DATE RECEIVED 7 6 76 JHLETTER 0 NOTOR IZE D PROP INPUT FORM NUMBER OF COPIES RECEIVED ABORIGINAL 8 LASS I F I E D UN C

. mI COPY

~ S none signed DESCRIPTION'tr ENCLOSURE trans the following: Licensee Event Report (RO<< 76-25) on 5-25-76 concerning'movability of regulating rod 59 St Lucie <<l NOTE: IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J, COLLIiIS FOR ACTION/INFORMATION e NCH CHIEF ' 7e ~ann CYS FO'IC

~ ASST H/ CYS ACRS CYS SE T TO LA INTERNAL DISTRIBUTION REG EILE NRC PDR I&K 2 SCHROEDER/IPPOLITO HOUSTON NOVAK/C11ECK GRIt IES CASE LER 1IANAUER TEDESCO iiIACCARY EISENIIUT BAER SIIAO VOLLMER/BUNCH EGER J COLLINS EXTERNAL DISTRIBUTION CONTROL NUMBER PDR ~ F'f f ev ce /

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@vga@@.6 FLORIDA POPOVER 5 LIGHT COii\PAHY June 25,'1976 PRN-LI-76-161 Mr. Norman C.. Moseley, Director, Region II Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 230 Peachtree Street, N. W., Suite 818 Atlanta, Georgia 30303

Dear Mr. Moseley:

REPORTABLE OCCURRENCE 335-76-25 ST. LUCIE UNIT 1 DATE OF OCCURBZNCE: 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 Vice President Power Resources MAS/cpc Attachment cc: Jack R.. Newman, Esquire Director, Office of Inspection and Enforcement (30)

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

HELPING BUILD ~LORIDA

'0 I

. LlCENSEE EVENT REPORT CONTROL BLOCK: gP PRINT ALL REQLIIREO INFORMATION3 1 6 UCZNSEE UCENSE EVENT

'AME

~

S L S 1 OO UCENSE NUMBER OO O 0 0 41111~03 TYPE TYPE

~

7 89 14 15 25 26 30 31 32 REPORT. REPORT

~ CATEOORY TYPE SOURCE ~

COCKET NUMBER EVENT OATE REPORT GATE

~pg opN'T L ~L . 0. 5 0 0 3 3 5 0 5 2 5 7 6 0 6 2 5 7 6 7 8 57 58 59 60 , 61 68 69 74 75 80 EVENT OESCRIPTION 7 89 rin reo erational testin , it was found that Regulating Rod 59 was BO immovable because the associated CEA module had malfunctioned. The mal-7 89 80

~04 e from bein able to move the rod 7 8 9 80 Qg8 7 9 however'he rod was 'still tri able. The CEA module was replaced and 80 gg the rod was restored to the o erable status in one hour and fifteen 7 89 80 SYSTEM CAUSE COMPONENT COOE COOE COMPONENT CQOE MANUFACIURER I007I LRRBJ ~E C R D R 0 E N 4 9 0 N 7 8 9 10 11 1? 17 43 44 47 CAUSE OESCRIPTION The manufacturer's test re ort indicated that two integrated circuit 7 8 9 80 Qg 'orn onents used in the raise/lower circuit of the module had failed.

7 8 9 80 This caused a low volta e condition which prevented the module from 7 89 FACILITY METHOO OF 80

~ STATUS Ie POwER OTHER STATUS OISCQVERY 'ISCOVERY OESCRIPTIQN 7 8 LsJ 9

~05 0 N A N/A 10 12 13 80 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE

~z. ~z N/A N/A 7 6 9 10 11 80 PERSONNEL EXPOSURES NUMBER TYPE OESCRIPTION

~p ~oo 0 ~z N/A 7 89 11 12 13 PERSONNEL INJURIES NUMBER OESCRIPTIQN

~~4

'7 8'9

~00 0 N/A 11 12 80 PRQPPJ3LP CONSEQUENCES

~15 N A 7 8 9 80 LOSS OR OAMAGE TO FACIUTY TYPE OESCRezTION A

7 89 10 80 PUBUCITY N

7 8 9 80 AOOITIONAL FACTORS

~18 See pa e 2 for continuation of Event Description and Cause Description.'

8 9 80 7 89 80 NAME M. A. Scho man PHONE.305 552-3779 ohio eeI- eeT

~POR1%BLE 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.

.0 0 %44