ML18113A331

LER 1976-027-00 for St. Lucie Unit 1, During Power Ascension Testing, Digital Data Processor Malfunctioned; Resulted in Loss of CEA Pulse Counting Position Indication

ML18113A331
Person / Time
Site:	Saint Lucie
Issue date:	06/30/1976
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-76-173 LER 1976-027-00
Download: ML18113A331 (11)

Text

'SC U.S. NUCLLAR REGULATOR'htlMISSION DOCKET NUMOER 12-7'if i ogM 195

~

5O-335 FILE NUMBER DISTRIBUTION FQR PART 50 DOCI(ET MATERIAL

)'RC INCXDENT REPORT FROM:FLORIDA POWER Itc LIGHT CO DATE OF DOCUMENT MIAMI~ FLA 4-3o MR N C MOSELEY A D SCHMIDT

-o-DATE RECEIVED t

NUMOER OF COPIES RECEIVED ETTE R QNOTORIZED PAOP INPUT FORM 0 ORIGINAL NCLASSIFIED COPY DESCRIPTION ENCLOSURE /.i

,LTR TRANS THE FOLLOWING......... LICENSEE 5ZNT REPOT 50-335-27 ON 5-31-'76 (30-DAY RPT) RE LOSS OF CEA PULSE COUNTING POSIZlON INDICATION..~ . ~ ~ ~"

K h ~h f

INMOST igCKNOVtLEDGED REMOVE PLANT NAhIE. ST LUCIE UNIT 1 NOTE; XF PERSONNEL EXPOSURE XS INVOLVED SEND DXRECTLY TO KREGER/J, COLLXNS r

FOR ACTION/INFORMATION

~ANCH CH E ~ ~

0 3 CYS FO A ON LIC ASST S

'i0/ CYS ACRS CYS HOLDING SE T TO LA INTERNAL D IST R I BUTION REG F RC PDR X & E 2 SCHROEDER/IPPOLITO I OUS 0'4 NOVAK/CHECK GRIhIES CASE LER HANAUER TEDESCO MACCARY EISENIIUT BAER SHAD VOLLhfER BUNCH EGER J COLLXNS EXTERNAL DISTRIBUTION CONTROL NUMBER PDR'C:

~S ~

NAC I'OAM 195 I2 76)

~ ~ 0 0 0 II 4 0 ~ 0 0 0 0 4 0

P.O. BOX 013100, MIAPhl, FLORIDA 33101

" i '~i'~/f/4 FLORIOA POWER IIt LIGHT COit IPAitIY June 30, 1976 PRN-LI- -7 gl CO 4

~ttfL Yw. Norman C. Moselep, 4srector, Region II Office of Inspection and Enforcement.

.U. S. Nuclear Regulatory Commission +j /Jg 230 Peachtree Street, N.H., Suite 818 Atlanta, Georgia 30303 >o

Dear Mr. Moseley:

REPORTABLE OCCURRENCE 335-76-27 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: MAY 31'976 BACKUP CEA POSITION INDICATION 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 z.

Vice President t

Power Resources MAS/ms Attachment CC Jack R. Newman, Esquire Director, Office of Inspection and Enforcement (30)

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

HELPING BUILD ."LO'RIOA,

TII '

U I CONTROL BLOCK: EASE PRINT ALL REQUIRED INFORMATION)

W g 6

'0 UCENSEE UCKNSE EVENT NAME UCENSE NUM8ER TYPE TYPE

[oO~] F L S L S 1 0 0 0 0 0 0 0 0 0 6 1 1 1 1 ~03 7 89 14 15 25 26 31 32 REPORT REPORT CATEGORY E SQ RCE OOCIIET NUM8ER EVENT OATE REPORT GATE

[oa~jcoav~ E ~~ 0 5 0 0 3 3 5 0 5 3 1 7 6 0 6 3 0 7 6 7 8 57 58 5S 60 61 68 69 74 75 60 EVENT OESCRIPTION Qp g During power ascension testing, the Digital Data Processor (DDP) 7 8 9 80

[pp~] malfunctioned with Group VII rods at 112 inches. This resulted in the 7 8 S 80 tOp4] loss of CEA pulse counting position indication. All reed switch 7 8 9 60 Qgg position indicator channels were verified operable. A faulty buffer 7 8 9 60 gg interface controller card was replaced and the DDP was returned to 7 89 PRME 80 SYSTKM CAUSE COMPO Ne!T COMPONENT

.COOK CQOE COMPONENT COOE MANUF~ VOLATION

~07 ~X.X 7 8 9 10

~E 11 '2 X X X X X X 17

~A 43 44 F 1 2 0 47

~N 48 CAUSE OESCRIPTION

[@pe This occurrence was caused by a faulty card in the buf fer inter face 7 8 9 60

[oagj controller. The card was returned to the manufacturer for testing.

7 8 9 60

~10 The manufacturer's test report indicated that failure of an integrated 7 89 FACLIIY 80 METHOO OF STATUS  % POWER OTHER STATUS OISCQVERY OISCOVKRY OESCRIPTION

~B ~05 0 N/A N/A 7 8 9 10 12 13 80 FORM OF ACTIVITY COAVKNT RKLEASEO OF RELEASE AMOUNT CF ACTIVITY LOCATION OF RELEASE KIH LJ LJ N/A N/A 7 s 9 10 11 44 45 80 PERSONNEL EXPOSURES

~00 0 ~Z N/A 7 89 11 12 13 80 PERS'ONNEL INJURIES NUMSER OKSCRIPTION

~00 0 N/A 7 89 11 12 80 PROBABLZ CONSEQUENCES

~15 N/A 7 89 I.OSS OR OAMAGE TO FACILITY TYPE . OESCRIPTIQN HE LJ N/A 7 89 10 80 PUBLICITY N/A 7 89 ~ 80 AOOITIONAL FACTORS See page 2 for continuation of Event Description and Cause Description.

7 89 80 Q

7 89 60 NAME'. A. Schoppman ON~. 305/552-3779 OFO SC!.6!T

I gO n i

~ REPORTABLE OCCURRENCE 335-76-27 LICENSEE EVENT REPORT PAGE TNO Event'Descri tion (continued) service within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The pulse counting indicator channels were then verified operable. A previous mal-function of the DDP was reported as Reportable Occurrence 335-76-19. (335-76-27).

S'ause Descri tion (continued) circuit (IC-10) had caused malfunction of the buffer inter-face controller.

P.O. BOX 013100, MIAMI, FLORIDA 33101

$5 FLORIDA POWER & LIGHT COMPANY June 30, 1976 PRN-LI-76-173 Mr. Norman C. Moseley, Director, Region Office of Inspection and Enforcement II U. S. Nuclear Regulatory Commission 230 Peachtree Street, N.W., Suite 818 Atlanta, Georgia 30303

Dear Mr. Moseley:

, REPORTABLE OCCURRENCE 335-76-27 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: MAY 31, 1976 BACKUP CEA POSTTION INDICATION f

The attached Licensee Event Report is being submitted'n accordance with Technical Specification 6.9 to provide 30-day notification of the, subject occurrence.I Very truly yours, D. c mz.

Vice President Power Resources MAS/ms Attachment cc: Jack R. Newman, Esquire Director, Office of Inspection and Enforcement (30)

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

HELPING BUILD FLO'R IDA

iP LICENSEE EVENT REPQR CONTROL BLOCK (PLEASE PRINT ALL REQUIRED INFORMATION) 1 UCENSEE UCENSE EVENT NAME UCENSE NUMBER TYPE TYPE

[OD1] F L S L S 1 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~03 89

~

7 14 15 26 30 31 32 REPORT REPORT

~01 ooN"I

, CATEGORY

+ E SO RCE

~~ 0 5

~

OOCKST NUMBER 0 0 3 3 5 0 5 EVENT OATE 3 1 7 6 0 6 REPORT'ATE 3 0 7 6 7 8 57 58 59 60 61 68 69 74 75 80 EVENT OESCRIPTION

~0 2 During power ascension testing, the Digital Data Processor (DDP) 7 8 9 80

[op~] malfunctioned with Group VII rods at 112 inches. This resulted in the 7 8 9 80 tpp~] loss of CEA pulse counting position indication. All reed switch 7 8 9 80 Qpg position indicator channels were verified operable. A faulty buffer 7 8 9 interface controller card was replaced and the DDP was returned to 80 89 PFEME 80 SYSTEM CAUSE COMPONENT COMPONENT COBE CODE COMPONENT COOE SUPPLER MANUFACTURER IODT] ~XX ~E X X X X X X B F ] 3 0 N 7 8 9 10 11 12 17 43 44 47 48 CAUSE OESCRIPTION

~08 This occurrence was caused b a faulty card in the buffer interface 7 8 9 80 controller.

~

[gag] The card was returned to the manufacturer for testing.

7 8 9 80 r ~1 0 The manufacturer's test report indicated that failure of an integrated 89 7

[111]

7 8 FACILITY STATUS

~B 9

FOAM OF

'05 10 POWER 0

12 13 OTHER STATUS N/A 44 MPHOO OF OISCOVERY 4S 46 OISCOVEAY OESCRIPTION N/A 80 80 ACTIVITY COATENT 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

~0""0" o ~z' N/A pg8 9 11 12 13 80 PERSONNEL INJURIES NUMBER OESCRIPTION

[ii4] ~00 0 N/A 7 89 11 12 80 PROBABLE CONSEQUENCES QS] N/A 7 8 9 80 LOSS OR OAMAGE Tp FACILITY TYPE OESCAIP11ON z N/A 7 89 10 80 I'7IXI I

PUBLICITY N/A 80 AOOITIONAL FACTORS See page 2 for continuation of Event Description and Cause Description.

7 89 80 7 89 80 M. A. Schoppman PHONE GPO Sbt. Oer

REPORTABLE OCCURRENCE 335-76-27 LICENSEE EVENT REPORT PAGE TWO Event Descri tion (continued) service within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The pulse counting indicator channels were then verified operable. A previous mal-function of the DDP was reported as Reportable Occurrence 335-76-19. (335-76-27).

Cause Descri tion (continued) circuit (IC-10) had caused malfunction of the buffer inter-face controller.