ML17340A957

Responds to IE Bulletin 80-20,Revision 1, Failures of Westinghouse Type W-2 Spring Return to Neutral Control Switches. Identifies Components & Number of Switches Used. Continuity Test Results Successful.Switches to Be Replaced

ML17340A957
Person / Time
Site:	Turkey Point
Issue date:	03/31/1981
From:	Robert E. Uhrig FLORIDA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-80-20, L-81-138, NUDOCS 8104130167
Download: ML17340A957 (4)

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FLORIDA POWER & LIGHT COMPANY March 31, 1981 Mr. James P. O'Reilly, Director, Region II s Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission ggIl/yp 101 Marietta Street, Suite 3100 R08 Atlanta, Georgia 30303 t98

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Dear Mr. O'Reilly:

Jg Re- RI 0-250,50-25 IE Bulletin 80-20, Rev. 1 Our response to the subject Bulletin for applicability to Turkey Point Units 3 E 4 was forwarded by letter dated September 16, 1980, (L-80-307).

Based on discussions with R. C. Lewis (USNRC IGE Region II), a revised response. is., attached and replaces our previous response in toto.

Approximately 145 man-hours have- been expended thus far in responding to the first two action items in the Bulletin.

truly yours,

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Very Robert E. Uhrig Vice President Advanced Systems a Technology REU/tom/at Attachment cc: Mr. Harold F. Reis, Escgxire Director, Division of Reactor Operations Inspection

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,,I. G. E'ulletin 80-20~ Rev 1, Attachment. Page 1 I

Item: 1 Determine whether. Westinghouse Type W-2 control switches with spring return to neutral position are used in safety-related applications at your facility. If so, identify the safety-related systems using these switches and the total num-ber of switches so used.. If. no such switches are. used. in your facility, you should. indicate, that- this is the case and ignore the remaining questions..

Res onse.'.1'corn nent A Component Cooling Water pump' Component Cooling: Water- pump C Component Cooling Water pump A Safety Injection pump B Safety Injection pump C Safety Injection pump D Safety Injection pump A Residual Heat Removal pump B Residual Heat Removal, pump A Containment Spray pump B Containment Spray pump A Intake Cooling Water, pump B Intake Cooling Water pump C Intake Cooling Water pump A Startup Transformer Breaker B Startup Transformer Breakez.

A Load. Center Feeder. Breaker B Load, Center Feeder. Breaker C Load. Center Feeder Breaker D Load Center Feeder Breaker Emergency Startup Transfer Breaker Total, Number of Switches:-

Unit No. 3 . . . . . . 21 Unit No. 4 . . . . . . 21 Item 2 Licensees of operating plants using Type W-2. spring return to neutral control switches. in safety-related. applications sha11 perform continuity tests on all such switches. These tests shall be performed with the switch operator in the neutra1 position and. completed. within; ten.,(10) days of the date of this bulletin.

In addition, this'ontinuity- test shall be repeated at least every'hirty-one (31) days after the initial test, and after each manipulation of the switch from its neutral position. These continuity tests may be discontinued subsequent to implementing 1'ong'er. term corrective: measures;.

~I & E. Bulletin; 80-20,, Rev. 1 Page 2 Res onse 2 Continuity tests were performed on all the switches listed in. Response 1 within ten (10) days of the date of the bulletin. The- results of the continuity tests on all switches were successful:..

Florida. Power &, Light. Company (FPL) committed. to repeat. the continuity test. at.

least every nienty-two (92) days after the initial. test. Based. on. discussions with R.. O'., Lewi's (USNRC' I & E. Region II) on. February 12, 1981,. the continuity test, schedule has: been revised to repeat= at, least'very sixty (60)= days: on-. a3 staggered basis, i.e.. Unit No. 3. in one month. and Unit No. 4 in. the subsequent.

month,, however, continuity tests after each manipulation of the switch from its neutral position would. not be required. These continuity tests may be discon-tinued subsequent to implementing longer term corrective action. The basis for

.the frequency of continuity testing is that the switches have continued to per-.

form successfully since the initial criticality for both Unit No. 3 and Unit No. 4, October 20, 1972, and June ll, 1973,, respectively.

Xeem 3 Licensees of operating plants and holders of construction permits shall describe the longer term corrective measures planned and the date by which such measures will be implemented by actual installation or by design change, as appropriate.

As a minimum, the longer term corrective measures should include rewiring the indicating light as. shown in Figure 1 provided the light is readily visible to the control room operator; If not, failures of the neutral position contacts should. be annunciated. in- the control room.

The development of longer term measures was. referred to our engineering department.

The evaluation has been completed., FPL plans to replace the; W-2 switches identified.

in the response to Item 1 with qualified replacement switches. The new switches will employ wiping contacts which should preclude problems associated. with contamin-ated contacts not= "making up"., The implementation schedule is tentatively set for July 1981, for Unit No. 4 and September 1981, for Unit No. 3, however; this schedule is contingent upon receipt of the. new switches, Continuity testing will. be continued at the frequency described in the response to Item 2. until the modifications can be completed.