ML19351D443

Forwards Response to IE Bulletin 80-20, Failures of Westinghouse Type W-2 Spring Return to Normal Control Switches. Total of 67 Switches in Unit 1 & 49 Switches in Unit 2 Identified in safety-related Sys

ML19351D443
Person / Time
Site:	Farley
Issue date:	09/24/1980
From:	Clayton F ALABAMA POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-80-20, NUDOCS 8010100133
Download: ML19351D443 (15)

Text

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Al:bam3 P:wer Company e,

600 North 18th Street

• 1 Post Offica Box 2641 DrminghIm, Allbama 35291 -

Telephone 205 250-1000 .U' '

' L-

F. L CLAYTON, JR.

Senior Vice President 7

7p g gg. 7 Alabama Power the soortem electic system September 24, 1980 Docket No. 0-348 No 50-364_

Mr. James P. O'Reilly V. S. Nuclear Regulatory Comission Region II St.1te 300 101 Marietta Street, N.W.

Atlanta, Georgia 30303

Dear Mr. O'Reilly:

As requested by I.E. Bulletin 80-20. " Failures of Westinghouse Type W-2 Spring Return to Neutral Control Switches," dated July 31, 1930 Alabama Power Company submits the enclosed response for Units 1 and 2 of the Farley Nuclear Plant.

lf ther'c are any questions, please advise.

Yours ver u ,

\ }/)? /

,_ F. L. Clayton, Jr. l RWS:de Enclosures cc: Mr. R. A. Thomas Mr. G. F..Trowbridge Mr. L. L. Kintner Mr. E. A. i'eeves Mr. W. H. Bradford Office of I&E Division of Reactor Operations Inspection Washington, D.C.

Office of I&E 1 Division of Construction Inspection Washington, D.C.

Mr. M. D. Hunt I&E, Regic. II vyy1Clish COYY 8010y oo l r3 g h . .. .-

• O ACTIONS TO BE TAKEN BY LICENSEES AND HOLDERS OF CONSTRUCTION PERMITS:

1 Determine whether Westinghcuse Type W-2 control switches with spring return to neutral position are used in safety-related appli-cations at your facility. If so, identify the safety-related i

systems using these switches and the total number 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.

RESPONSE

l All safety related systems have been reviewed to identify all

Westinghouse Type W-2 control switches with spring return to neutral position. A total of 67 of the subject switches were identified at FNP 4

Unit 1 and 49 in FNP Unit 2. The function of each switch is shown in Appendix A.

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.' 2. Licensees of operating plants using Type W-2 spring return to' neutral control switches in safety-related applications shall perform continuity tests on all such switches. These tests shall be performed with the switch operator in the neutral position and completed within ten (10) days of the date of this bulletin. In addition, this continuity test shall be repeated at least every thirty-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 the longer term corrective measures described below.

RESPONSE

Unit 1 The 67 switches identified in FNP Unit 1 have been reviewed to determine t' effect of a failure of the neutral contacts to close properly, 58 ;f the identified switches do not use the neutral contacts.

Of the nine unit 1 switches utilizing the neutral contacts, only two are configured such that the subject failure would not be detected and result in defeat of an automatic function. These switches, their function and associated immediate corrective actions are as follows:

a. Local handswitch at 600V load center ID local control panel (LCP). ED13 p"R TO MCC 15 from 600V load center ID. A failure of this handswitch could prevent auto closure of the

" breaker if the associated " REMOTE-LOCAL" handswitch is in the

" LOCAL" position. The normal position is " REMOTE".

INTERIM CORRECTIVE ACTION:

The " REMOTE-LOCAL" handswitch has been tagged in the " REMOTE" position. Continuity of the neutral contacts of switch ED-13 will be checked prior to placing the " REMOTE-LOCAL" switch to

" LOCAL", after ear,h manipulation of ED-13 when the " REMOTE-LOCAL" switch is in " LOCAL", and every 31 days.

b. Local handswitch on 600 volt bus 1R LCP. ER02-INCOMING BREAKER.

A failure of this handswitch could prevent automatic bus transfer of 600 volt load center 1R from Unit 1 power to Unit 2 power.

INTERIM CORRECTIVE ACTION: ,

The' automatic bus transfer function is not required to be

, operable prior to Unit 2 operation. The testing requirements of item 2 of this bulletin will be implemented from fuel loading until long term corrective action is completed.

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c. Local handswitch on 600 volt bus 15 LCP. ES02-INCOMING BREAKER.  ;

Local handswitch on 600 volt bus ID LCP. ED12-INCOMING BREAKER.

Local handswitch on 600 volt bus ll LCP. EE12-INCOMING BREAKER.

Local handswitch on 600 volt bus 1D LCP. E002-INCOMING BREAKER.

Local handswitch on 600 volt bus lE LCP. EE02-INCOMING BREAKER.

A failure of the switches could prevent an audible alarm on the EPB of a breaker trip.

INTERIM CORRECTIVE ACTION:

Due to the fact that failure of these handswitches will not affect the visual position indication on the EPB, Load Center or Local Control Panel indicating a breaker trip, no corrective action is necessary prior to the implementation of the longer term corrective action.

d. Handswitch on Main Control Board NICllHS-2109G - REACTOR BREAKER TRIP.

Handswitch on Main Control Board N1CllHS-2109H - REACTOR BREAKER TRIP.

A failure of these switches to makeup in the neutral position would prevent reset of the reactor trip breakers.

INTERIM CORRECTIVE ACTION:

Due to the fact that the failure of these switches' neutral position contacts to makeup in no way impairs their ability to perform their '

trip (or safety) function, no interim corrective action is to be implemented pending implementation of the long term corrective action.

e Unit 2 Of the 49 switches identified in FNP Unit 2, 40 do not use the neutr al contacts. Of the remaining nine, only two are configured such that the subject failure would not be detected and result in defeat of an automatic function. These switches are as follows:

a. Local handswitch at 600 volt load center 2D LCP, ED-13-BKR TO MCC 15 from 600V load center 2D. A failure of this handswitch is identical to that of ED-13 in Unit 1 (see item 2a above).

b. Local handswitch at 600 volt load center 1R LCP.

ER-05-INCOMING BKR. A failure of this handswitch could prevent automatic bus transfer of 600 volt load center 1R from Unit 2 power +o Unit 1 power.

INTERIM CORRECTIVE ACTION:

O FNP Unit 2 is presently not operational, therefore, this item does not apply; ho,'ever, subsequent to Unit 2 fuel loading, the testing requirements of item 2 of this bulletin will be implemented until long term cor rective action is completed. .

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c. Local handswitch on 600 volt bus 2D LCP. ED12-INCOMING BREAKER.

. Local handswitch on 600 volt bus 2E LCP. eel 2-INCOMING BREAKER.

Local handswitch on 600 volt bus 20 LCP. ED02-INCOMING 3REAKER.

Local handswitch on 600 volt bus 2E LCP. EE02-INCOMING BREAKER.

Local handswitch on 600 volt bus IS LCP. ES05-INCOMING BREAKER.

A failure of these switches could prevent an audible alarm on the EPB of a breaker trip.

INTERIM CORRECTIVE ACTION:

Due to the fact that failure of these handswitches will not affect the visual position indication of the EF , Load Center, or local Control Panel indicating a breaker trip, no corrective action is necessary prior to the implementation of the longer term corrective action.

d. Handswitch on Main Control Board N2CllHS-2109G - REACTOR BREAKER TRIP.

Handswitch on Main Control Board N2CllHS-2109H - REACTOR BREAKER TRIP.

A failure of these switches to makeup in the neutral position would .

prevent reset of the reactor trip bre;kers.

INTERIM CORRECTIVE ACTION:

l Due to the fact that the failure of these switches' neutral position contacts to makeup in no way impairs their abilit'; to perform their trip (or safety) function, no interim correctivc action is to be implemented pending implementation of the long term corrective action.

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3.

Licensees of operatinp plants and holders of construction permits shall describe the longer term corrective measures planned and the date by which such nicasures will be implemented by actual instal-lation or by design char.ge, 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 1

room.

RESPONSE

The nine FNP Unit 1 and the nine FNP Unit 2 switches utilizing neutral position contacts will be replaced as soon as replacements are available and plant conditions permit.

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APPENDIX "A" UNIT 1 l

ELEM. NORdiL REMARKS ITEM DIAG. SWITCH & BKR N0. & POSITION NO. DWG. NO. LOCATION SERVICE CONTACT USED

_ 1 D-177047 LHS AT 600V EA08-L.C. lA NO L.C. IA LCP BUS TIE BKR 2~ D-177050 LHS AT 600V EA09-L.C. IA NO L.C. IA LCP TIE BKR TO L.C. ID 3 D-177058 LHS AT 600V EC08-L.C. 1C N0 )

L.C. 1C LCP BUS TIE BKR l 4 lD-177059 LHS AT 600V EC10-L.C. 1C NO L.C. IC LCP TIE BKR T0 i L.C. 1E I

5 D-177064 LHS AT 600V ED08-L.C. 1D N0 '

L.C. 1D LCP TIE BKR TO L.C. IA t

_ 6 D-177070 LHS AT 600V EE07-L.C. 1E N0 L.C. 1E LCP TIE BKR TO L.C. IC l 7 D-177072 HS AT 600V E012-L.C. Ib YES SW W/ FULL TO L.C. 10 LCP INC BKR FROM CONTACT USED LOCK-0VT IN L.C. 1F FOR EPB ALARM TRIP POSITION 8 D-177072 liS AT 60:7V EE12-L.C. 1E

_ L.C. IE LCP INC BKR FROM L.C. 1F 9 D-177074 HS AT 600V ED02-L.C. 1D L.C. 1D LCP INC BKR FROM STA SERVICE XFMR ID 10 D-177074 HS AT 600V EE02-L.C. 1E L.C. 1E LCP INC BKR FROM

1. V STA SERVICE XFMR 1E 11 D-177077 HS AT 600V ED04- BKR TO NO L.C. 10 LCP BATT CHRGR 1A 12 D-177077 HS AT 600V EE05- BKR TO N0 L.C. IE LCP BATT CHRGR IB PAGE A-1 l

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. UNIT 1 j ELEM. NORMAL REMARKS

• BKR NO. & POSITION

-l ITEM DIAG. SWITCH &

NO. DWG. NO. LOCATION SERVICE CONTACT USED j 13 D-177078 HS AT 600V E009- BKR TO N0 i L.C. 10 LCP BATT CHRGR 1C 14 D-177078 HS AT 600V EE06- BKR TO N0 L.C. 1E LCP BATT CHRGR 1C 15 D-177089/1 LHS AT 600V ED10-BKR TO NO

, L.C. ID LCP MCC 1A l "

l 16 LHS AT 600V EE10-BKR TO NO j L.C. IE LCP MCC IB

.i LHS AT 600V ED05- BKR TO NO ,

, L.C. 10 LCP MCC 1F N0 4

! 18 LHS AT 600V EE11- BKR TO j L.C. 1E LCP MCC 1G t

l 19 LHS AT C00V EE14-BKR TO NO l

! L.C. 1E LCP MCC IT

! 20 LHS AT 600V ED14- BKf! TO N0 i L.C. 1D LCP MCC IU a

e i 21 V LHS AT 600V EE15- PKR TO NO L.C. 1E LCP MCC IV 22 0-177089/2 LHS AT 600V ED13- BKR TO YES - IN AUTO '

L.C. 1D LCP MCC 1S CLOSE CKT WHEN CTR. IS XFER'D TO

' LOCAL' 23 D-177222/1 LHS AT 600V ED15 - CTMT NO L.C. 1D LCP CLR 1A 24 LHS AT 600V ED16 - CTMT NO L.C. 1D LCP CLR 1B i

25 LHS AT 600V EE08 - CTMT NO L.C. 1E LCP CLR 1C 26 V LHS AT 600V EE16 - CTMT NO L.C. IE LCP CLR ID 27 D-177262 LHS AT 600V EDil - CRDM NO L.C. 10 LCP CLNG FAN 1B 28 D-177262 LHS AT 600V EE13 - CRDM NO L.C. IE LCP CLNG FAN 1A PAGE A-2

UNIT 1

. ELEM. .

NORMAL REMARKS ITEM DIAG. SWITCH & BKR NO. & POSITION NO. DWG N0. LOCATION SERVICE CONTACT USED 29 2825 600V BUS EK02 NO 1K LCP INC. BREAKER 30 2826 EK03 NO FDR. TO MCC IK 31 28E. v EK05 NO BUS TIE BRKR.

32 2825 600V BUS ELO2 NO IL LCP INC. BREAKER 33 2826 ELOS NO ,

BUS TIE BRKR. I 34 2826 v ELO9 NO FDR. TO MCC IL i 1

35 2825 600V BUS EH02 NO 1H LCP INC. BREAKER ,

36 2826 EH03 N0 l FDR. TO MCC IX l

37 2E26 y EH05 NO -

} BUS TIE BRKR.

38 2829 600V BUS EJ02 N0 IJ LCP INC. BREAKER 39 2826 EJ05 NO

. BUS TIE BRKR.

40 2826 v EJ09 NO FDR. TO MCC 1Y 41 2831 600V BUS ER02 YES FAILURE OF CONTACT 1R LCP INC. BREAKER WOULD PREVENT AUTO.

BREAKER CLOSE 42 2832 ER03 NO

'r FDR. TO MCC IN 43 2831 600V BUS ES02 YES. CONTACT USED IN IS LCP INC. BREAKER BREAKER TRIP A'_ ARM (EPB) 44 2832 ES03 N0 FDR. TO MCC IP PAGE A-3

1 UNIT 1

! ELEM. NORMAL REMARKS ITEM DIAG. SWITCH & BKR. N0. & POSITION NO. DWG. NO. LOCATION SERVICE CONTACT USED 45 2831 600V BUS ESO4 NO 15 LCP FIRE PROT. PUMP HOUSE l _. 46 2775 DIESEL 1-2A DIESEL 1-2A N0 l LCP SPEED CONT.

47 2775 DIESEL 1-2A YES FAILURE OF CONTACT l

MAN. VOLT. CONT. CLOSURE WILL NOT AFFECT DIESEL 48 2775 DIESEL 1-2A YES FAILURE OF CONTACT V AUTO. VOLT. CONT. CLOSURE WILL NOT AFFECT DIESEL 49 2779 DIESEL 18 DIESEL 1B N0 LCP SPF.ED CONT.

50 2779 DIESEL 1B YES FAILURE OF CONTACT MAN. VOLT. CONT. CLOSURE WILL NOT AFFECT DIESEL Si- 2779 DIESEL 1B YES FAILURE OF CONTACT V AUTO. V0LT. CONT. CLOSURE WILL NOT AFFECT DIESEL 52 2783 DIESEL 1C DIESEL 1C N0

LCP SPEED CONT.

1 53 2783 DIESEL IC YES FAILURE OF CONTACT MAN. VOLT. CONT. CLOSURE WILL NOT j' AFFECT DIESEL

! 54 2783 DIESEL IC YES FAILURE OF CONTACT l

y AUTO. V0LT. CONT. CLOSURE WILL NOT AFFECT DIESEL 55 2794 DIESEL 2C DIESEL cC NO LCP SPEED CONT.

56 2794 DIESEL 2C YES FAILURE OF CONTACT l

MAN. VOLT. CONT. CLOSURE WILL NOT AFFECT _THE DIESEL

! 57 2794 DIESEL 2C YES FAILURE OF CONTACT y AUTO VOLT. CONT. CLOSURE WILL NOT AFFECT THE DIESEL i PAGE A-4

UNIT 1 ELEM. NORMAL REMARKS

, ITEM DIAG. SWITCH & BKR. NO. & POSITION NO. DWG. NO. LOCATION SERVICE CONTACT USED 58 U-260544- 128 CTMT ISOLATION U-175907 MCB SEC. Al PHASE "B" NO 59 129 CTMT ISOLATION MCB SEC. Al PHASE "B" N0 60 27 CTMT ISOLATION NO l

MCB SEC. A2 PHASE "B" 61 28 CTMT ISOLATION NO MCB SEC. A2 PHASE "B" l

'62 29 CTMT ISOLATION NO l MCB SEC. A2 PHASE "A"  !

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63 30 SAFETY INJ. N0 MCB SEC. A2 64 31 REACTOR TRIP YES MCB SEC. A2 65 80 REACTOR TRIP YES MCB SEC. C 66 81 SAFETY INJ. NO MCB SEC. C 67 y 82 CTMT ISOLATION NO MCB SEC. C PHASE "A" c

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. APPENDIX "A"

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UNIT 2 ELEM. NORMAL REMARKS ITEM DIAG. SWITCH & BKR. NO. & POSITION NO. DWG. N0, LOCATION SERVICE CONTACT USED 1 0-207047 LHS AT 600V EA08- L.C. 2A NO L.C. 2A LCP BUS TIE BKR 2 D-207050 LHS AT 600V EA09- L.C. 2A NO L.C. 2A LCP TIE BKR T0 i L.C. 20 3 D-207058 LHS AT 600V EC08- L.C. 2C NO L.C. 2C LCP BUS TIE BKR 4 D-207059 LHS AT 600V EC10- L.C. 2C NO L.C. 2C LCP TIE BKR TO L.C. 2E 5 D-207064 LHS AT 600V ED08- L.C. 2D NO L.C. 2D LCP TIE BKR TO L.C. 2A 6 D-207070 LHS AT 600V EE07- L.C. 2E NO L.C. 2E LCP TIE BKR TO L.C. 2C 7 D-207072 HS AT 600V ED12- L.C. 20 YES SW W/ PULL TO L.C. 2D LCP INC BKR FROM CONTACT USED LOCK-00T IN L.C. 2F FOR EPB TRIP POSITION ALARM 8 D-207072 HS AT 600V EE12-L.C. 2E L.C. 2E LCP INC BKR FROM L.C. 2F 9 D-207074 H5 AT 600V E002- L.C. 2D L.C. 2D LCP INC BKR FROM STA SERVICE XFMR 20 10 D-207074 HS AT 600V ~ EE02- L.C. 2E L.C. 2E LCP INC BKR FROM STA SERVICE

" V XFMR 2E 11 D-207077 HS AT 600V ED04- BKR TO NO L.C. 2D LCP BATT CHRGR 2A 12 D-207077 HS AT 600V EE05- BKR TO NO L.C. 2E LCP BATT CHRGR 2B PAGE A-6

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. UNIT 2

. ELEM. NORMAi. REMARKS l ITEM DIAG. SWITCH & BKR. NO. & POSITION j NO. DWG. N0. LOCATION SERVICE CONTACT USED

! 13 D-207078 HS AT 600V ED09- BKR TO NO l L.C. 2D LCP BATT CHRGR 2C l

14 D-207078 HS AT 600V EE06- BKR TO NO L.C. 2E LCP BATT CHRGR 2C

, 15 D-207089/1 LHS AT 600V ED10- BKR TO NO L.C. 2D LCP MCC 2A

! 16 LHS AT 600V EE10- BKR TO N0 j L.C. 2E LCP MCC 28 l 17 LHS AT 600V ED05- BKR TO NO L.C. 2D LCP MCC IF

18 LHS AT 600V EE09- BKR TO NO l L.C. 2E LCP l MCC IG t 19 LHS AT 600V EE14- BKR TO N0 j L.C. 2E LCP MCC 2T )

! 20 LHS AT 600V ED14- BKR TO N0 L.C. 2D LCP MCC 20 l 21 v LHS AT 600V EE15- BKR TO N0 l L.C. 2E LCP MCC 2V

! 22 D-207089/2 LHS AT 600V ED13- BKR TO YES - IN l l L.C. 2D LCP MCC IS AUTO CLOSE CKT WHEN l CTRL IS

, I XFER'D TO

' LOCAL' I 23 D-207222/1 LHS AT 600V ED15 - CTMT N0 l L.C. 2D LCP CLR 2A i

1 24 LHS AT 600V ED16 - CTMT N0 l L.C. 2D LCP CLR 28 25 LHS AT 600V EE08 - CTMT N0

, i L.C. 2E LCP CLR 2C I

26 V LHS AT 600V EE16 - CTMT l'0 l

. L.C. 2E LCP CLR 2D 27 D-207262 LHS AT 600V ED11 - CRDM f!0 L.C. 2D LCP CLNG FAN 2A PAGE A-7

UNIT 2 t ELEM. NORHAL- REMARKS ITEM DIAG. SWITCH & BKR. NO. & POSITION NO. DWG. N0. LOCATION SERVICE CONTACT L' SED 28 D-207262 LHS AT 600V EE13- CRDM NO L.C. 2E LCP CLNG FAN 2B 29 D-207089/1 LHS AT 600V ED06- BKR TO NO L.C. 2D LCP MCC 2CC 30 D-207089/1 LHS AT 600V EEll- BKR TO NO L.C. 2E LCP MCC 2DD 31 D-202825/1 LHS AT 600V EH08 - 600V L.C. NO L.C. 1H LCP 2H INC BKR 32 D-202825/1 LHS AT 600V EJ08 - 600V L.C. NO L.C. 1J LCP 2J INC BKR 33 0-202825/2 LHS AT 600V EK08 - 600V L.C. N0 L.C. 1K LCP 2K INC BKR 34 D-202825/2 LHS AT 600V ELO8 - 600V L.C. NO L.C. IL LCP 2L ING BKR 35 D-202831/1 LHS AT 600V ES0S - 600V L.C. YES L.C. IS LCP IS INC BKR FR CONTACT USED STA SERV XFMR 2S FOR EPB ALARM 36 D-202831/2 LHS AT 600V EROS - 600V L.C. YES L.C. IR LCP 1R INC BKR FR CONTACT USED STA SERV XFMR 2R IN AUT0-CLOSE CKT

. 37 D-202779 LHS/GS AT DSL GEN #2B NO DSL LOCAL SPEED CTRL  ;

CTRL PNL 1 38 D-202779 LHS/MV AT DSL GEN #2B YES DSL LOCAL MANUAL V0LT. CONTACT USED CTRL PNL CTRL IN MAN. VOLT.

CTRL CKT.

39 D-202779 LHS/AV AT DSL GEN #2B YES j DSL LOCAL AUTO. V0LT. CONTACT USED CTRL PNL CTRL IN AUTO VOLT CTRL CKT 40 U-260544 128 CTMT ISOLATION N0 U-175907 MCB SEC. Al PHASE "B" PAGE A-8 l 1

, UNIT 2 I ELEM. NORMAL REMARKS

' ITEM DIAG. SWITCH & BKR. N0. & POSITTON NO. DWG. NO. LOCATION SERVICE CONTACT USED I

41 U-215854 129 CTMT ISOLATION NO l

. U-215853 MCB SEC. Al PHASE "B" 42 27 CTMT ISOLATION NO ,

MCB SEC. A2 PHASE "B" j l

43 28 CTMT ISOLATION N0 MCB SEC. A2 PHASE "B" 44 29 CTMT ISOLATION NO MCB SEC. A2 PHASE "A" i

j 45 30 SAFETY INJ. N0 i MCB SEC. A2 I 46 31 REACTOR TRIP YES

! MCB SEC. A2 i

47 80 REACTOR TRIP YES MCB SEC. C 48 81 SAFETY INJ. NO MCB SEC. C 49 v 82 CTMT ? SOLATION NO I MCB SEC. C PHASE "A" l

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