ML18113A320

LER 1976-034-00 for St. Lucie Unit 1, in Order to Compensate for Errors Found in NSSS Vendor'S Strikin II Computer Code, Several Instrumentation and Control Setpoints Were Adjusted

ML18113A320
Person / Time
Site:	Saint Lucie
Issue date:	08/06/1976
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-76-199 LER 1976-034-00
Download: ML18113A320 (7)

Text

NRC Pv>1M 106 U.S. NUCLEAR REGULATORY C SION DOCKET NUMBER g.voI 50-335 FILE NUMBER NRC DISTRIBUTION FoR PART 60 DOCKET MATERIAL INCIDIWT RI"PORT TO: FROM: DATE OF DOCUMENT Florida'Power & Light Company 8/6/76 Mr. Norman C. Moseley Miami, Florida DATE RECEIVED A. D S'chmidt 9/l/76 LFTTER QNOTORIZED PROP INPUT FORM NUMBER OF COPIES RECEIVED jgoRIDINAL C3coPY g UN C LASS IF I E D I

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One signed

~ I l~myv DESCRIPTION ENCLOSURE Ltr. trans the following: Licensee Event Report (RO 50-335-76-34) on 7/6/76 concerning corrective measures taken to compensate for errors found in the NSSS vendor's STRIKIN II computer code.

ACKNOWLEDGED (l-P) ('-') .DONOV H,ZMOVZ PLANT NOTE: IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J .COLLINS mIE't.

Lucie Nl FOR ACTION/INFORMATION 9 2 76 RJL BRANCH CHIEF: Ziemann W Cr8 1OR ACTION LIC..ASST.: Di s W CYS ACRS CYS HOLDING S TO LA INTERNAL D IST R I BUTION NRC PDR IREE 2 MIPC SCHROEDER IPPOLITO HOUSTON NOVAK CHECK GRIMES CASE ~ ~

TEDESCO MACCARY EISENHUT SHAO VOLIZER BUNCH GER J. COLLINS EXTERNAL DISTRIBUTION CONTROL NUMBER LPDR: Ft. Pierce Fla. ~

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=-"O'a FLORIDA POWER 5 LIGHT COMPANY August 6, 1976 PRN-LI-76-199 tt

~If,"P Mr. Norman C. Moseley, Director, Region XI Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 230 Peachtree Street, N.W., Suite 818 Atlanta, Georgia 30303 g,S, ~+~~INI08 C~I ~IIaII

Dear Mr. Moseley:

REPORTABLE OCCURRENCE 335-76-34 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: JULY 6, 1976 LOCAL POWER DENSITY ALARM SETPOINT 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/bfp 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

LICENSEE EVENT REPORT CONTROL BLOCK: (PLEASE PRINT ALL RECIUIRED INFORMATION)

LK4ENSEE UCENSE EVENT NAME LICENSE NUMBER TYPE TYPE

[OD1] 8 L S L S 1 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~03 89

~

7 14 15 25 26 30 31 32 REPORT REPORT

, CATEGORY TYPE SOURCE ~

DOCKET NUMBER EVENT OATE REPORT OATE QpgooN7 ~L ~L p 5 p p 3 3 5 0 7 0 6 7 6 0 8 0 6 7 6 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION

[pp~] In order to compensate for errors found in the NSSS Vendor's STRIKIN II 7 8 9 80

[QQ3]

computer code ( see LER 335-7 6-3 1 ), several instrumentation and control 7 8 9 ~

80 top~] setpoints were adjusted. The adjustment factor for the core local 7 8 9 80

[0D~] ower densit alarm was 1.24 however on Jul 6 a nonconservative 7 8 9 80 gg value of 1.1 was set into the instrumentation. The error was found 7 8 9 PRME 80 7

~I~AANNUNCNF120 8 9 10 SYSTEM COBE CAUSE COBE 11 12 COMPONENT COOE 17 COMPONENT SUPPUER 43 44 COMPONENT MANUFACTURER 47 N

48 CAUSE DESCRIPTION

~0 8 A nonconservative adjustment factor was set into the Incore Detector 7 8 9 80

[oO~] S stem because of ersonnel error. A memorandum which lists the ro er 7 8 9 80

,Q~O set oin a d r ss 'm 7 89 80 FACRJTY METHOO OF STATUS 5 POWER OTHER STATUS OISCOVERY DISCOVERY OESCRIPTION

~B ~08 0 N/A C N/A 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 N/A N/A 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE OESCRIPTION

~z ~00 8 N/A 7 8 9 11 12 13 80 PERSONNEL INJURIES EH.

7 89 LoL~ 11 12 N A 80 PROBABLE CONSEQUENCES

[<is] N/A 7 8 9 80 LOSS OR DAMAGE TO FACILITY TYPE OESCRIPTION 7

HE89LzJ 10 80 PUBLICITY 7 89 ~ 80 ADDITIONAL FACTORS'ee 7

a e two for continuation of Event Descri tion and Cause 8 9

~99 Description.

7 89 NAME:

M.A.Schoppman PHONE'0 305/552-3779 GPO Spl GOT

REPORTABLE OCCURRENCE 335-76-34 LICENSEE EVENT REPORT Pa e Two Event Descri tion (Continued):

approximately 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> later during a review of the setpoints,

,and the setpoint for the core local power density alarm was corrected. Review of the Digital Data Processor printout for this 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> period showed that there was no time during which operation was in noncompliance with the requirements of Technical Specification 3.2.1 for a revised linear heat rate limit of 12.7 kw/ft. This was the first occurrence of this type at St. Lucie Unit, l. (335-76-34)

Cause Description (Continued):

distributed for review by appropriate personnel.