ML16148A338

LER 80-006/03L-0:on 800625,at 40% Full Power,Valve 2LP21 Failed to Open Electrically on Command.Caused by Loose Setscrew on Motor Driven Pinion.Screw Repaired

ML16148A338
Person / Time
Site:	Oconee
Issue date:	06/26/1980
From:	Jackie Jones DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML16148A339	List: ML16148A338 ML19330A950
References
LER-80-006-03L-02, LER-80-6-3L-2, NUDOCS 8007290830
Download: ML16148A338 (2)

Text

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:8007290830 DOCDATE: 80/06/26 NOTARIZED: NO DOCKET FACIL:50*270 Oconee Nuclear Station, Unit 2, Duke Power Co. 05000270 AUTH.NAME AUTHOR AFFILIATION JONES,J.L. Duke Power Co.

RECIPNAME RECIPIENT AFFILIATION Region 2, Atlanta.Office of the Director

SUBJECT:

LER 80-006/03L-0:on 800625atL40% full powerrvalve 2LP21 failed to open electrically on command.Caused by loose setscrew on motor driven pinionScrew repaired.

DISTRIBUTION CODE: A002S COPIES RECEIVED:LTR ENCL SIZE:

TITLE: Incident Reports NOTES:M Cunningham:all amends to FSAR & changes to Tech Specs. 05000270 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL ACTION: REIDR, 05 1 1 FAIRTILEM. 06 2 2 INTERNAL: A/D COMP&STRUCT 1. 1 A/D ENV-TECH 1 1 A/D MATL & QUAL 1 1 A/D OP REACTORS 1 1 A/D PLANT SYS 1 1 A/D RAD PROT 1 1 A/D SFTY ASSESS 1 1 A/D TECHNOLOGY 1 1 ACC EVAL BR 1 1 AEOD 10 10 AUX SYS BR 1 1 CHEM ENG.BR 1 1 CONT SYS BR 1 1 CORE PERF BR 1 1 D/DIRHUM FAC S 1 1 DIRENGINEERING 1 1 DIRHUM FAC SFY I 1 DIRSYS INTEG 1 1 EFF TR SYS BR 1 1 EMERG PREP 1 1 EQUIP QUAL BR 1 1 GEOSCIENCES 1 1 HUM FACT ENG BR 1 1 HYD/GEO BR 1 1 I&C SYS BR 1 1 I&E 09 2 2 JORDANE,/IE 1 1 LIC GUID BR 1 1 LIC QUAL BR 1 1 MATL ENG BR 1 1 MECH-ENG BR 1 1 MPA 11 3 3 NRC PDR 02 1 1 OP EX EVAL.BR 3 3 OR ASSESS BR 1 1 POWER SYS BR 1 1 PROC/TST REV BR 1 1 QA BR 1 1 RAD ASSESS BR 1 1 REACT SYS B' 1 1 01 1 1 REL & RISK A BR 1 SFTY PROGEVAL 1 1 SIT ANAL BR 1 1 STRUCT ENG BR 1 I SYS INTERAC:BR 1 1 EXTERNAL:-ACRS 16 16 LPDR 03 1 1 NSIC 04 1 1 TERA:DOUG MAY 1 1 JUL 3 1980 TOTAL NUMBER OF COPIES REQUIRED: LTTR 82 ENCL 82

MNC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7-771 LICENSEE EVENT REPORT EXHIBIT A CONTROL BLOCK: - (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

[i IlSI CIN IEI El ZI Of0 -10 10.1 010 101-10100(411 III1'10Li 7 8 9 LICENSEE CODE 14 16 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CONT 760 1u131LL LO 15 1010 Of 1 DOCKET NUMBER 21710 68 (1612 15 1810 eI0 161216 1810 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES O-27 With the unit at 40% FP, the valve 2LP21 failed to open electrically upon r-o 3 command. The valve was opened manually and declared inoperable. The problem was corrected and the valve declared operable within 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />, well within o the 24-hour limit of Technical Specification 3.3.2.b(2). This incident was rO6 Inot significant with respect to safe operation, and the health and safety of o the public were not affected.

SYSTEM CAUSE CAUSE Camp, VALVE 109 7 8 9 CCDE SIFI 10 CODE L

11 SUBCOOE 1g 12 o [L@

13 COMPONENT CODE I A L VLO P Is SUBCOOE 19 SUCODE 20 SEU E YENTIAL OCCURRENCE REPORT REVISION.

LE/R f-VTYA REPORT NO.

NUMBER L so 10 22 23 j 1I1J 24 2s tJ 27 0 u0 cooDE LkL2J TYPE II LiJ NO.

10 ACTION FUTURE EFFECT 21 2 SHUTDOWN S2.ATgMN -APCOOET TAKNN PkN C71N MEHO 14UF SUaMITTED FOR SUBa.

33 2.4 E X(3 1 Zlo as I28 JD L 10" 010l0 27 1i 41 L 1(2 42 S1UPPLIER0 L

3 I/--\IOI MANUFACTURER CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 4

[IThe setscrew on a motor-driven pinion was loose. This could have resulted Lfrom previous repair work done or from a combination of vibration and age.

1 2The loose screw was repaired and the valve returned to service. Operability

___of the valve was verified. The LPI valve motors on the other units will be SI checked for similar deficiencies as soon as possible.

7 a89 FACILITY g TATUS %POWER OTHER STATUS DISCHOVVYI DISCOVERY DESCRIPTION s ~J 1 4j 01!l NA f [B 10[Preventive Maintenance Testing SON 7 89 10 12 13PUSUCQ~trrio '4 48 41 s 47 ACTIVITY CONTENT LOC RELEASED OP RELEASE AMOUNT OF ACTIVITYL F16 1 IZIII NA I NA 2 7 88 10 11 44 46 S PERSONNEL EXPOSURES s

.)

EiI71 r__ -o 10 01z TYPE DESCRIPTION 7 8 9 NUMBER Ii 12 1(9 NA 1238 PERSONNEL INJURIES 7 89 s NUMBER DESCRIPTIO 11 0RELESEDOF 0-1)L0 RLEAEPAMOUNTO L.JoeTIVITY(04~37-89 NA LOSS OF OR DAMAGE TO FACILI TY( so I.IT TVU@L~J 1 PE .. ESC RPtION PERSON OL EXOOUEE NA 7 a89 10 NUBEYP DsRITOI~

itSUE DESCITO MAC USE ONLY 1-2701 U L NA E9 10 4 0 L NB Pen ea PHNE ( 8 nn