ML18110A879

LER 1977-335-27 for St. Lucie, Unit 1 on Dropped Control Element Assembly No. 39 Initiating a Turbine Runback

ML18110A879
Person / Time
Site:	Saint Lucie
Issue date:	06/27/1977
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
LER 1977-335-27
Download: ML18110A879 (7)

Text

NRC FOQM 196

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U.S. NUCLEAR REGULATORY COM,,~SION I F o-3 S DOCKET NUMBER I LE NUMBE R NRC DISTRIBUTION FoR PART 60 DOCKET MATERIAL FROM: DATE OF DOCUMENT TO:

Florida Power & Light Company 6/27/77 Mr. Norman C Moseley Miami, Florida DATE RECEIVED A. D~ Schmidt 7/22/77 ETTE R 0 NOTO R IZE D PROP INPUT FORM NUMBER OF COPIES RECEIVED RIG INAL Q COPY CONC LASS IF I E D I >cc ~~~

DESCRIPTION ENCLOSURE Licensee Event Report (RO 50-335/77-27) on 5/27/77 concerning Control Element Assembly (CEA) f39 drppping PLANT VIAIIE:

) CKNOWLZDGZD St. Lucie Unit No l DO NOT REMOVE R JL 7/22/77 (l-P) (2 P)

NOTE: IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J. COLLINS FOR ACTION/INFORMATION INTERNAL D IST RI BUTION EXTERNAL DISTRIBUTION CONTROL NUMBER I 772030Z50 ACRS 16 SENT AS AT NRC FORM 196 I2 76)

P. O. BOX 013100, MIAMI, FL 33101 I'ps~uA FLORIDA POWER & LIGHT COMPANY Regu)Bye~

Fil C PRN-LI- 7 7-2 0 8 Mr. Norman C. Moseley, Director, Region Office of Inspection and Enforcement II U. S. Nuclear Regulatory Commission 230 Peachtree Street, N. W., Suite 1217 Atlanta, Georgia 30303

Dear Mr. Moseley:

REPORTABLE OCCURRENCE 335-77-27 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: MAY 27, 1977 CEA 39 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. c x, Vice President t

Power Resources MAS/cpc Attachment cc: Robert Lowenstein, Esquire Director, Office of Inspection and Enforcement (30)

Director, Office of Management Information and Program Control (3) 772030250 PEOPLE .. ~ SERVING PEOPLE

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LICENSEE EVENT REPORT A t

( F CONTROL BLOCK: CPLAASE PAINT ALL PEDUIAED INFDAFEATIDNI 1

LCEAISEE UCENSE EVENT NAME LCENSE NUMBER TYPE TYPE

[OD1] F L S L S 1 0 0 0 0 0 0 00 0 4 1 1 1 1 ~0033

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7 89 14 15 '25 26 30 31 32 Ioa~]coNT 7 8 CATEGORY 57 58 REPORT TYPE 59 REPORT SOURCE 60 61 o

DOCKET NUMBER 0 ~ 68 69 0 5 EVENT DATE 2

74 75 REPORT DATE 80 I

EVENT DESCRIPTION With the lant o eratin at ower, and the Control Element Drive S stem

't toad 89 80 CEDS in the Auto Se uential Mode Control Element Assembl CEA 439 7 8 9 80 tpo~j 7 8 9 h EA i a urbine runback. Durin the run-80

[oOsj edwa re ulatin valve failed o en due 7 8 9 80

~06 89 h reb causin th PRME "A" main feedwater um to tri on low 80 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE MANUFACTURER IDD~] ~RI B ~B c 0 N 0 N C 4 9 0 7 8 9 10 11 12 17 48 CAUSE DESCRIPTION I006 7 8 9 A was found to have a fault insertion timer which would cause the 80 l00m rod to be released u on recei t of an insertion si nal. The timer was re 7 8 9 80 laced and tested rior to returnin the lant to ower o eration.

7 89 METHOD OF 80 FACIUTY STATUS POWFR OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION B ~03 NA NA 7 8 9 10 12 13 44 45 46 80 FORM OF ACTIVITY CO@TENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA NA 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Qsj ~oo o z NA

'7 89 11 12 13 80 PERSONNEL INJURIES NUMBER DESCRIPTION

~IA 7 89

~00 O NA 11 12 80 PROBABLE CONSEQUENCES Q~g NA 7 8 9 LOSS OR DAMAGE TO FACILITY TYPF DESCRIPTION z NA 7 89 10 P U8LICITY NA 8 9 ~ 80 ADDITIONAL FACTORS

[QE for continuation of Event Descri tion.

7 89 60 Qs]

7 89 80 NAM6 M. A. Scho man PHONE: (3 05) 552-38 02 GFO 681 ~ 657

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fw REPORTABLE OCCURRENCE 335-77-27 LICENSEE EVENT REPORT PAGE TWO EVENT DESCRIPTION (Continued) suction pressure. This led to a reactor trip on low steam generator level approximately four minutes after the CEA dropped. This report is generated due to Technical Specification 3.1.3.le (CEA alignment requirements). This was the fourth "dropped CEA" occurrence (LER's 335-76-37, 335-77-6, 335-77-17). Since the four occurrences are unrelated with respect to cause, they are not con-sidered to be generically related.

(335-77-27)

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