ML20091L645

Interim Significant Deficiency Rept SDR 84-04 Re Limitorque SB-2-80 Actuators Susceptability to Gear Damage.Initially Reported on 840419.Actuators to Be Replaced W/Fully Qualified SB-1-60 Actuators

ML20091L645
Person / Time
Site:	Wolf Creek, Callaway, 05000000
Issue date:	06/01/1984
From:	Seiken S STANDARDIZED NUCLEAR UNIT POWER PLANT SYSTEM
To:	Jay Collins, James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III), NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
JDR-84-4, SDR-84-04, SDR-84-4, SLNRC-84-90, NUDOCS 8406080148
Download: ML20091L645 (2)

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w - h DA SNUPPS Standardiaod Nuclear Unit Power Plant System 5 Choke Cherry Road Rockville, Maryland 20:50 taon see.soto June 1, 1984 SLNRC 84-90 FILE: 0491.10.2 SUBJ: Interim Significant Deficiency Report (SDR 84-04): Limitorque SB-2-80 Actuators Susceptability to Gear Damage Mr. James G. Keppler Regional Administrator, Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. John T. Collins Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Suite 1000, Parkway Central Plaza Arlington, Texas 76012 Docket Nos. STN 50-482 and STN 50-483 Gentlemen:

Pursuant to the requirements of 10CFR50.55(e), Mr. W. A. Crossman, NRC Region IV, was notified by R. P. White, SNUPPS Staff via telecon on April 19, 1984, of a potential significant deficiency involving Limitorque Model 58-2-80 high torque actuators used in conjunction with four (4) safety-related Westinghouse EMD valves. The deficiency was initially reported to Region III by Union Electric for Callaway. Based on the investigation of damaged gears, set screws, and pinion keys identified during and after startup testing at the Callaway Plant, a determination was made that the deficiency is potentially generic to the Wolf Creek as well as the Cal-laway plant.

To minimize the schedule impact on the1Callaway fuel load, Union Electric elected to replace their Limitorque Model SS-2-80 actuators with fully qualified Limitorque Model 58-1-60 actuators. -A final report outlining details for Callaway only is being finalized by Union Electric. SNUPPS will. follow the generic resolution of this deficiency and provide subse-quent reports to-the NRC on behalf of Wolf Creek. This is as discussed with Mr. Johnson, NRC Region IV, on May 22, 1984.

It is anticipated that a follow-up report will be made within'60 days of  ;

^ the date of the, final Callaway report.  !

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'l 8406080148 840601 l g DR ADOCK 05000482 1 PDR 1

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b o SLNRC 84 90 Page Two Should there be any questions concerning this report, please do not hesitate to call the undersigned or Bob Kosky of the SNUPPS Staff.

Very truly yours, 9

-[ M4 S. J. Seiken QA Manager RPW/dck/14a12 cc: D. F. Schnell UE G. L. Koester KGE D. T. McPhee KCPL H. Bundy NRC/WC J. H. Neisler NRC/ CAL B. H. Little NRC/ CAL R. C. DeYoung NRC/IE: HQ J. E. Konklin NRC/IE: III Record f

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