ML18113A316

LER 1976-037-00 for St. Lucie Unit 1, with Reactor Critical at 0.01 Percent Power, Control Element Assembly 50 Dropped

ML18113A316
Person / Time
Site:	Saint Lucie
Issue date:	08/10/1976
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-76-205 LER 1976-037-00
Download: ML18113A316 (6)

Text

NRC FORM 196 ,U.S. NUCLEAR REGULATORY COMM CSION DOCKET NUMBER

<<2 10) 50-335 FILE NUMBER NRC'ISTRIBUTION FoR PART 50 DOCKET MATERIAL INCIDFtIT REPORT TO: FROM: DATE OF DOCUMENT Mr. P~orman C. Moseley Florida Power 6 Light Company 81076 Miami, Florida DATE RECEIVED A. D. Schmidt 81976 ONOTORIZED PROP INPUT FORM NUMOER OF COPIES RECEIVED PQ ETTER 0 OR I 0 INAI PfUN C LASS I F I E D One signed copy J5copv DESCRIPTION ENCLOSURE Ltr. trans the following: Licensee Event Report (RO 50-335-76<<37) on 7)10/76 concerning the Control Element Assembly (CEA) 50 dropping with the reactor critical at 0.01 percent power.

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II PLANT NAME NOTE: IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J .COLLINS S t, Lucie gl FOR ACTION/INFORMATION 8 19 76 RJL BRANCH CHIEF: Ziemann W ~ CPS 1YiR ACTION LIC..ASST.: Diggs W CYS ACRS CYS HOLDING S TO LA INTERNAL DISTRIBUTION EG FI NR PDR ICE 2 MIPC SCHROEDER IPPOLITO HOUSTON NOVAK CHECK GRIMES CASE BUTLER..

HANAUER TEDESCO MACCARY EISENHUT SHAO VOLIbZR BUNCH KREGER J. COLLINS EXTERNAL DISTRIBUTION CONTROL NUMBER-LPDR:

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.ice FLORIDA POM'ER 5 LIGHT CO>i1PA'IY August 10, 1976 >CIJtatII PRN-LI-76-205 OQ0fef F't~

.'fr. Norman C. Mo eley, Director, Region II Office of Inspection and Enforcement U,S. Nuclear Regulatory Commission 230 Peachtree Street N",j, Suite 81S Atlanta, Georgia 30303

Dear Mr. Moseley:

AUG>9 $ 76 5 IIIII'P,IIIIÃIILA". Ig 00lhIAIS5 10II REPORTABLE OCCURRENCE 335-76-37 M~I SW! III ST. LUCIE UNIT 1 DATE OF OCCURRENCE: JULY 10, 1976 CEA 50 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. Schmidt Vice President Power Resources MAS/vh Attachment cc: Jack R. Newman, Esquire Director, Office of Inspection and Enforcement (30)

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

HELPING GUILD FLORIDA

I LICENSEE EVENT REPORT CONTROL BLOCK: (P E PAINT ALL REQUIRED INFORMATION) 1 UCENSEE OCENSE EVKNT QgFLNLS100 89>

NAME 0

UCENSE NUMBER 0 0 0 0 0 0 4 1 TYPE 1 1 1 ~03 TYPE

~

7 14 15 25 26 30 31 32 REPORT, REPORT

. CATEGORY TYPE'OURCE ~

oocIIET NUMBER ~ EVENT OATE REPOR OATS 0

~

[001IcoN'r ~L 0 5 0 3 3 5 0 7 1 0 7 6 0 8 1 0 7 6 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION Qo 2 With the reactor critical at 0,01 percent power, Control Element Assembly (CEA) 50 7 8 9 80

[00~] dro 'ed. on ins ection a failed 15 volt ower sup ly was found in the control 7 89 ao Qp4j CPA 0. The ower su 1 was re laced and the osition of CEA 50 was 7 8 9 80 Q~ 5 restored to within Technical Specification limits. This was the first occurrence 7 8 9 80 Qo g of this t e at St. Lucie Unit 1. t'335-76-37) 7 89 PRME 80 SYSTEM COMPONPR COMPONENT 7

IRRBJ 8 9 10 CAUSE'onz]

CAUSE DESCRIPTION

~F 11 12 c

COMPONENT COOE R DR V E 17 '3SUPPLER

~N 44 C

MANUFACTURER 4 90 47 VIOLAT3ON

~N 48

~0 8 The failure of a 15 volt: power supply resulted in a loss of power to the CEA 50 7 8 9 80 Qg8 latchin mechanism. The ower s 1 has been bench tested but the cause of its 7 9 80

[iioj se the failure mechanism has not been re roducable.t I 7 89 80 METHOO OF 7 8 9 10 12 13 N/A.,

OTHER STATUS 'LSCOVERY 44 a

45 46 N/A OISCOVERY OESCRIPTION 80 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASK Qg z ~z N/A N/A 7 8 9 10 11 44 45 80 PERSONNEl EXPOSURES

'[iisj ~00 0 3 N/A 7 89 11 12 13 80 PERS'ONNEL INJURIES NUMBER OESCRIPTION N/A 7 8 9 11 12 ao PROBABLE CONSEQUENCES

~s N/A 7 89 80 LOSS OR DAMAGE TO FACILITY TYPE OESCRIPTION z N/A 7 89 10 80 PU8LICITY N/A 7 89 ~ 80 ADDITIONAL FACTORS N/A 7 89 80 7 89 60 I~(. A. Scho oman PHONEI 305 552"3779 CFO ee> ~ CBT

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