ML18110A887

LER 1977-335-24 for St. Lucie, Unit 1 Non-Conservative CEA Drop Time

ML18110A887
Person / Time
Site:	Saint Lucie
Issue date:	04/29/1977
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
LER 1977-335-24
Download: ML18110A887 (4)

Text

P. 0, BOX 013100, MIAMI, FL 33101 FLORIDA POWER 8 LIGHT COMPANY April 29, 1977 PRN-LI-77-128 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 335-77-24 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: APRIL 15, 1977 TECHNICAL SPECIFICATION 3.1.3.4 The attached Licensee Event Report is being submitted in accordance with Technical Specification 6.9 to provide prompt notification of the subject occurrence.

Very truly yours, A. D. Schmidt Vice President Power Resources MAS/cpc Attachment cc: Robert Lowenstein, Esquire Director, Office of Inspection and Enforcement (40)

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

I 0 CONTROL 8LOCK: /PL E PAINT ALL REQUIRED INFORMATION]

I UCENSEE LCENSE EVENT NAME LCENSE NUMBER TYPE TYPE F L S L S 1 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~01 89 14 15 25 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCE OOCIIET NUMBER EVENT'ATE REPCRi 1 CONT~, T ~L 0 5 0 0 3 3 5 0 4 1 5 7 7 0 4 2 DATE 9 7 7 8 57 58 59 60 61 68 69 74 75 80 J

EVENT DESCRIPTION 0 ven 8 9 80 conservative. The Specification re uires a CEA dro time of less than or 8 9 80 e ual to 3.3 seconds however the value used in the final accident anal is 8 9 80 was 3.0 seconds. This has had no safet si nificance because the measure 8 9 drop times have all been well below 3.0 seconds (about 2.4 seconds max.). 60 8 9 PRME 80 SYSTEM CAUScr" COMPONENT C M?CNENT CQQE CODE CQMPQNENT COOK RPPUGl h4AiIUFACIUAER 8 9 10 E ~E z z z z z Lzf Z 9 9 9 11 12 17 43 47 CAUSE DESCRIPTION e n view of the St. Lucie Unit 1 Technical S ecifications showed 8 9 80 that the current CEA dro time s ecification is nonconservative with 8 9 res ect to the accident anal sis. The correct limit of 3.0 seconds has 89 FACIUTY 80 METHOD OF STATUS POWER OTHER STATUS DISCOVERY OIS QVERY OESCIh?TION 9

E 10

~lp O 12 13 NA 44 d

45 46 Notified b NSSS Vendor FOAM OF ACTIVITY CONTENT RELcKASEO OF RELcASE AMOUNT CF ACTIVITY LOCATION OF RELEASE

~z ~z NA NA 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPc OESCRI?T. N bd @Lan Lil NA 80 PERSONNEL INJURiES hie~

NUMBER OESCRI?TION 80 QQ~LE CONSEQUENCES NA 9 80 LOSS OR DAMAGE TO FACILITY E DESCRIPTION

~z NA 9 10 80 PUBLICITY NA

~ 80 ADDITIONAL FACTORS 4 f continuation of Event Descri tion and Cause Descri tion.

80

REPORTABLE OCCURRENCE 335-77-24 LICENSEE EVENT REPORT PAGE TWO Event Descri tion (Continued)

'This was the first reportable occurrence at St. Lucie Unit 1 involving a nonconservative specification on CEA drop time.

(335-77-24)

Cause Descri tion (Continued) been instituted administratively. A proposed Technical Specifica-tion amendment will be submitted to the NRC to request a formal change correcting Specification 3.1.3.4.

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