ML18227A440

Letter Transmitting Licensee Event Report, High Setpoint for Overtemperature Delta-T Reactor Trip Channel II in Unit 4 Occurred on 1/30/1976 in Accordance with Technical Specification 6.9.2 to Provide 30-day Notification

ML18227A440
Person / Time
Site:	Turkey Point
Issue date:	02/25/1976
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/RGN-II
References
PRN-LI-76-30
Download: ML18227A440 (7)

Text

DOCKET NUMOER NBC roAM 195

'I2 TO) 50-251 FILr NUMBER NRC DISTR>IRUTION roA PART 50 DOCI<ET MATERIAL INCIDENT REPORT TO: FROM: DATE OF DOCUMENT N. C. Moseley ~ Florida Power 6 Light 2-25-76 Miami, Florida -33101 DATE RECEIVED A. D. Schmidt 3-4-76

~ETTER QNOTOR IZED PROP INPUT FOAM NUMBER OF COPIES RECEIVED

&ORIGINAL Q V NC LASS IF I E D Q COPY 1 si ned DESCRIPTION ENCLOSU AE Ltr trans the following reportable Reportable Occurrence'251-76-1. on occurrence: 1-30-76 re High Setpoint for Overtemperature DELTA-T Reactor Trip Channel II (1 cy encl' PLANT NAME. NOTE: XF PERSONNEL EXPOSURE XS INVOLVED T k P $4 SEND DXRECTLY TO KREGER/J. COLLINS SAFETY FOR ACTION/INFORMATION ENVIRO ' 4 BRANCH CHIEF: LEAR

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FLORIDA POWER 5 LIGHT COMPANY February 25, 1976 PRN-LI-76-30 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 251-76-1 TURKEY POINT UNIT 4 DATE OF OCCURRENCE: JANUARY 30, 1976 HIGH SETPOINT FOR OVERTEMPERATURE DELTA-T REACTOR TRIP CHANNEL II The attached Licensee Event. Report is being submitted in accordance with Technical Specification 6.9.2 to provide 30-day notification of the subject occurrence.

Very truly yours,

.chmidt Vice President Power Resources MAS/jn Attachment cc: Jack R. Newman, Esquire Director, Office of Inspection and Enforcement (40)

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

HELPING BUILD FLORIDA

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CONTROL BLOCK:

~ LICENSEE EVENT REPORT t'PLEASE PRINT ALL REQUIRED INFORMATION)

UCENSEE LICENSE EVENT NAME LICENSE NUMBER TYPE TYPE Jog L'T P 0 0 0 0 4 1 1 1 1 ~0033

~

7 89 14 15 25 26 30 31 32 REPORT REPORT I001IGQNT 7 8 CATEGORY 57 58 TYPE L

59 SOURCE L

60 0

61 5 0 DOCKET NUMBER 0 2 5 1 68 69 0 lEVENT DATE 3 0 7 6 74 0

75 2

REPORT DATE 2'57 80 EVENT DESCRIPTION

[0D2J. Durin a eriodic test. the Channel Two overtem erature delta-T reactor 7 8 9 80 7 89 80

[oO~] ermitted b Technical S ecification 2.3. Redundant, Channels One 7 8 9 80 Qo g and Three were available and o erable thereb satisf in the re-7 8 9 80

[oD~J uirement that at least two overtem erature delta-T channels be 7 89 PRME 80 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPLER MANUFACTURER

~0> ~IA ~E I'N 0 T R U N H 0 2 0 Y 7 8 9 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION 7

~08 8 9 The failure of two 500 MFD filter ca acitors in si nal summator 80

[0Dg TM-4-422F, 'Model 4lll084-004, ermitted an a >~c.> si nal to be su er-

d. c. si'al in th'e corn arator that corn ares the actual 7 8 9 80

@~ 0 im osed on a 7 89 FACIUTY METHOD OF 80 STATUS POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION o o NA b NA 7 8 9 10 12 13 44 45 46 80 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE Q~g z z NA NA 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION 7

~13 89

~I~0 11 z

12 13 80 PERSONNEL INJURIES NUMBER DESCRIPTION Q~~j Loaoo 7 89 11 12 80 PROBABLE'ONSEQUENCES

~15 NA 7 8 9 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION tj66 z NA 7 89 10 80 PUBLICITY NA 7 89 80 ADDITIONAL FACTORS Qi g See next a e for continuation of Event Descri tion and Cause 7 89 80

~19 Descri tion.

7 89 80 NAMEI PHONE:

OPO sat Sev

'eportable Occur ence 251-76-1 Licensees Event Report Pagg. Two Event Descri tion (continued) operable. This is the first Reportable Occurrence related to a non-conservative overtemperature delta-T setpoint. Two capacitors in a signal summator were found to be open and were replaced with new capacitors. The overtemperature delta-T setpoint was then satisfactorily retested. (251-76-1).

Cause Descri tion (continued) delta-T with the overtemperature delta-T setpoint. This caused the setpoint to be raised above the required value.

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