ML18113A318

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

ML18113A318
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: ML18113A318 (4)

Text

~ 4 ~ O. BOX 013100, MIAMI, FLORIDA 33101 FLORIDA POWER 8L LIGHT COMPANY August 10, 1976 PRN-LI-76,-205 Mr. Norman C. Moseley, Director, Region II Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 230 Peachtree Street NN, Suite 818 Atlanta, Georgia 30303

Dear Mr. Moseley:

REPORTABLE OCCURRENCE 335-76-37 ST. LUCIE UNIT 1 DATE OF OCCURRENCE'ULY 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 BUILD FLORIDA

g LICENSEE EVENT REPORT CONTROL BLOCK: (PL SE PRINT ALL REQUIRED INFORMATION)

UCEN~~ UCENSE EVENT NAME LICENSE NUMBER TYPE TYPE

[oa] F L S L S 1 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~03

~

BS 14 15 25 26 30 31 32 REPORT REPORT

, CATEGORY TYPE SOURCE OOCKET NUMBER EVENT OATE REPORT OATE

~p1 ppN'T L ~L 0 5 0 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 I

EVENT DESCRIPTION Qo 2 With the reactor critical at 0,01 percent power, Control Element Assembly (CEA) 50 7 8 9 80 dro ed. on ins ection a failed 15 volt ower su 1 was found in the control 7 8 9 80

~o~ CFA 50. The ower su 1 was re laced and the osition of CEA 50 was 7 8 9 80

[oas] restored to within Technical Specification limits. This was the first occurrence 7 8 9 IOOI of, this t e at St. Lucie Unit 1. (335-.76-37), 80 7 8 9 PRME 80 SYSTEM CAUSE COMPONENT COMPONENT 7

Qp7p ~RB 8 9 10

~F 11 CAUSE DESCRIPTION 12 C

COMPONENT COOE R D R V E 17 '3 SUPPUER N

44 C

MANUFACTURER 4 '90 47 N

48 too/ 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 su 1 has been bench tested but the cause of its 7 9 80

[iso] Ise the failure mechanism has not been re roducable.

7 89 80 FACIUTY METHOO OF OTHER STATUS 06COVERY OISCOVERY OESCRIPTION Q~g ~B ~00 0 N/A a N/A 7 8 9 10 12 13 44 45 46 80 FORM OF ACTIVITY CONTENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE

+Z +Z N/A N/A 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES

'~p ~o'"o""o ~z" N/A 7 89 11 12 13 80 PERSONNEL INJURIES OESCRIPTION N/A 7 8 9 11 12 80 PROBABLE CONSEQUENCES

[is~] N/A 7 8 9 80 LOSS OR DAMAGE TO FACILITY TYPE OESCRIPTION Z N/A 7 89 10 80 PUBLICITY N/A 7 8 9 .80 ADDITIONAL FACTORS

~18 N/A 7 8 9 80 7 89 80 M. A. Scho man IHoNE: 305 552-3779 Gpo eet. eeT

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