ML13309B250

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Forwards Reactor Trip Breakers, Providing Technical & Programmatic Aspects of 830301 & 08 Surveillance Test Failures,Superseding 830413 Rept.Handouts from 830412 Meeting Encl
ML13309B250
Person / Time
Site: San Onofre  
Issue date: 04/15/1983
From: Dietch R
Southern California Edison Co
To: Harold Denton
Office of Nuclear Reactor Regulation
Shared Package
ML13309B251 List:
References
NUDOCS 8304180392
Download: ML13309B250 (39)
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Text

REGULATORY IN MATION DISTRIBUTION SYST&(RIDS)

ACCESSION NBR:8304180392 DOC,0ATE: 83/04/15 NOTARIZED: NO DOCKET #

FACIL:50-361 San Onofre Nuclear Station, Unit 2, Southern Californ 05000361 50-362 San Onofre Nuclear Station, Unit 3, Southern Californ 05000362 AUTH.NAME AUTHOR AFFILIATION DIETCH1PR, Southern California Edison Co.

RECIP.NAME RECIPIENT AFFILIATION DENTONHR.

Office of Nuclear Reactor Regulationseirector

SUBJECT:

Forwards "Reactor Trip Breakers," providing technical &

programmatic aspects of 830301 & 08 surveillance test 01)T+

failuressuperseding 830413 rept.Handouts from 830412 4

)e x

meeting enet.

I-M iC DISTRIBUTION CODE: 80018 COPIES RECEIVED:LTR LENCL ZE

.TITLE: Licensing Submittal' 9PSAR/FSAR Amdts & Related Correspondence NOTES:J Hanchett icy PDR Documents. ELD Chandler Icy, 05000361 NRR Scaletti icy.

J Hanchett icy PDR.Documents, ELD Chandler icy.

05000362 RECIPIENT COPIES RECIPIENT COPIES 10 CODE/NAME 4TTR ENCL ID CODE/NAME LTTR ENCL NRR/DL/ADL 1

0 NRR LB3 BC 1

0 NRR LB3 LA 1

0 ROOD,H, 01 1

1 NTERNAL: ELD/HDS2 1

0 IE FILE 1

1 IE/DEPER/EPB 36 3

3 IE/DEPER/IRB 35 1

1 IE/DEQA/QAB 21 1

1 NRR/DE/AEAB 1

0 NRR/DE/CEB 11 1

1 NRR/DE/EHEB 1

1 NRR/DE/EQB 13 2

2 NRR/DE/GB 28 2

2 NRR/DE/HGEB 30 1

1 NRR/DE/MEB 18 1

1 NRR/DE/MTEB 17 1

1 NRR/DE/SAB 24 1

1 NRR/DE/SGEB 25 2

2 NRR/DHFS/HFEB40

.1 1

NRR/DHFS/LQ8 32 1

1 NRR/DL/SPB 1

0 NRR/DSI/AEB 26 1

.1 NRR/DSI/ASB 1

1 NRR/DSI/CPB 10 1

1 NRR/DSI/CS8 09 1

1 NRR/DSI/ICSB 16 1

1 NRR/DSI/METB 12 1

1 NRR/D$I/PSB 19 1

N P/RAB22 1

NRR/DSI/RSB 23 1

EG F 04 1

1 RGN5 3

3 M/DDAMI/MIS 1

0 EXTERNAL; ACRS 41 6

6 BNL(AMDTS ONLY) 1 1

DMS/DSS (AMDTS) 1 1

FEMA-REP DIV 39 1

1 LPOR 03 1

1 NRC PDR 02 1

1 NS IC 05 1

1 NTIS 1

1 NOTES:

3 3

TOTAL NUMBER OF COPIES REUUIRED: LTTR 57 ENCL

50

Southern California Edison Company P. 0. BOX 800 2244 WALNUT GROVE AVENUE ROBERT DIETCH ROSEMEAD, CALIFORNIA 91770 TELEPHONE VICE PRESIDENT 2I3-572-4444 April 15, 1983 Mr. H. R. Denton Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D. C. 20555 Gentlemen:

Subject:

Docket Nos. 50-361 and 50-362 San Onofre Nuclear Generating Station Units 2 and 3 SCE met with the NRC staff on April 12, 1983 in Bethesda, Maryland to review the technical aspects of the March 1 and 8, 1983 surveillance test failures of the San Onofre Units 2 and 3 reactor trip breaker (RTB) undervoltage trip devices.

By letter dated April 13, 1983, SCE trans mitted a report relative to the technical aspects of the RTB discussed during the April 12, 1983 meeting and committed to provide additional information regarding the programmatic aspects of this issue.

Consistent with this commitment, enclosed please find sixty three (63) copies of the Reactor Trip Breaker report for San Onofre Units 2 and 3.

This report provides information on both the technical and programmatic aspects relative to the RTB's.

The comparable technical sections of this report are essentially unchanged from the information submitted on April 13, 1983; however, to the extent that these two reports differ, the report transmitted by this letter supersedes the report previously transmitted on April 13, 1983.

Also enclosed is a copy of the handouts which were used during the April 12, 1983 meeting.

Please contact me if you have any questions or comments.

Very truly yours, cc: Mr. John Martin, Regional Administrator NRC Region V 0

00a

ENCLOSURE TO SCE TO NRC LETTER DATED APRIL 15, 1983, FROM R., DIETCH TO H. R. DENTON The following paragraphs of the enclosed April 15, 1983 Reactor Trip Breaker Report contain changes other than editorial changes from the technical portion of the RTB report provided by SCE's letter dated April 13, 1983:

III. B..2. d The fourth sentence was corrected to reflect the fact that when the breaker is installed in the "test" position (not "racked out" as indicated previously), the diode is in the UV coil circuit.

IV.D.3.b.6)

Change provides clarification of the intent of the maintenance procedure.

IV.D.4 Paragraph was reworded to clarify intent.

V.A.3 The third paragraph was revised to be consistent with discussion provided in Section IV.D.3.b.6).

VI.A.4 Paragraph was reworded to clarify description of shunt coil per formance.

ENCLOSURE REACTOR TRIP BREAKERS San Onofre Units 2 and 3 April 12, 1983 Meeting Handouts

MEETING WITH NRC SAN ONOFRE NUCLEAR GENERATING STATION UNITS 2 AND 3 REACTOR TRIP CIRCUIT BREAKERS April 12, 1983 I. Introduction K.P. Baskin II. Background R.L. Phelps A. Reactor Protection System Design B. Reactor Trip Breaker Design III.

Reactor Trip Breaker Investigative Tests W.N. Rothenbuhler A. Description of Testing B. Conclusions from Testing C. Corrective Actions IV. Pre-Return-To-Power Actions A. Breaker Maintenance, S.W. Stilwagen B. Breaker Surveillance Testing M.O. Medford V. Conclusions K.P. Baskin

.1EASUREMENT CHANNELS 123456789-123456t8-N 123456789-12345889 BISTABLES HAN ELSA 6 111 N E dHANNELSD

'.'GIC

  • MATRICqS A-B LOGI A-C LOGI A-D LOGIC 8-C LOGIC 80 LOG C C-LOGIC A64 C4 Ab4 HC4 B4 CD4

!-OAI2 102 01 002 ag o;

,4ATRIX 2A92 A2Ac

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A a

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a a

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B a~t 0

0 TO 120 Vac TO 120 Van TO 120 Vac 120 Vac VITAL INSTRUMENT VITAL INSTrUMENT VITAL INSTRUMINT VITAL INSTRUMENT BUBNo1A 1

&USNo1 BUSNo. IC AUS No. D0.

All

-AB2No A@3 LA84 ACI AC2.

AC3 AC4 AD1 A02*

A3

= AD4 Ici BC2

  • C3 BC4

,31P PATHS31=

0.3034 801 802 agg 8D4 CIRCUIT AK CD CD2 CD CD CONTROL K

K2 K3RAY r(

(4 480 Vac-3 480 Vac-30 BUS No. 1 BUS No.2 MAIN CIRCUIT No.1 )

BREAKERS N

MOTOR N.

GENERATORS No.1 No.2 240 Vac.3

1.

SNCHRONIZER 4125 VdcBUSNo.2 01

+125 Vdc BUS No.3 BUS TIE rANUAL IQ

-K2 K3 TRIP No.1 No1 -

uv -

3....

ST v

ST 4125 Vdc BUS No.1 S*12 Vc: BUS Nc.4 MANUAL KI TRIP CIRCUIT TRIP No.2 BREAKERS K4K4

- -V -ST--

UV ST UV ST CEDM POWER INDIVI UAL CD CEDM ONTROL INDIVIDUAL CEDM SUPPLIES POWER SUPPLIES SYSTEM POWER SUPPLIES J

ZW CED)%1SONTOL IIDUALCEDCONTROLIE CEDM C-DW*

CEOM CEDA r C C

ELEMENT COILS COILS COILS COILS

)COILS C

DRIVE MECHAMSMS SIMPLIFIED FUNCTIONAL DIAGRAM OF THE REACTOR PROTECTION SYSTEM

REACTOR TRIP SWITCHGEAR A. PURPOSE INTERRUPT POWER TO THE CONTROL ELEMENT DRIVE MECHANISMS WHEN REQUIRED BY AN AUTOMATIC TRIP SIGNAL FROM THE PPS OR WHEN A MANUAL TRIP IS INITIATED.

B. BREAKER CONFIGURATION THE'BREAKERS ARE CONFIGURED TO ENSURE THAT WHEN A TRIP IS REQUIRED A SINGLE BREAKER FAILURE WILL NOT PREVENT A TRIP.

ADDITIONALLY, A SINGLE BREAKER FAILURE WILL NOT CAUSE A REACTOR TRIP.

C. BREAKER CONTROL CIRCUIT

1. BREAKER PAIRS RECEIVE POWER FROM FOUR INDEPENDENT CONTROL POWER SOURCES.
2. THE BREAKER TRIP CIRCUIT FUNCTION IS SAFETY GRADE. THE BREAKER CLOSING CIRCUITS IS QUALIFIED FOR STRUCTURAL INTEGRITY BUT DOES NOT HAVE A SAFETY GRADE FUNCTION.
3. THE BREAKER TRIP FUNCTION IS ACTUATED AUTOMATICALLY AND MANUALLY VIA A SHUNT TRIP DEVICE AND AN UNDERVOLTAGE DEVICE.

THE SHUNT TRIP IS ENERGIZED TO ACTUATE.

THE UNDERVOLTAGE DEVICE IS DEENERGIZED TO ACTUATE.

OT MOT GEN GEN

) MGI

) MG-2 R4X2200I R4X34015

02.

U-0U-04]

JLT1 TCB-2 TCB-6 TCB-7 )

TCB-3 CTI CT7 cTS CT3 TCB-1 )

) TCB-5 I

TCB-8 )

)TcB-4.1 U-I CR4I041

-cR45061 U-05 L

01

SUMMARY

RPS AND RTB POWERED BY 4 CHANNELIZED INDEPENDENT, BATTERY BACKED VITAL BUSES

  • RPS AUTOMATIC AND MANUAL ACTUATION OPERATES BOTH UV AND SHUNT TRIP DEVICES ON RTB
  • RPS/RTB MEETS SINGLE FAILURE CRITERION
  • UV TRIP DEVICE NOT REQUIRED TO FUNCTION FOR THE RPS TO ACCOMPLISH ITS PROTECTION FUNCTION.,

INVESTIGATIVE PROGRAMS IN PLANT INVESTIGATION o

INVESTIGATED 3 TCB'S o

VENDOR & NRC INVOLVED o

PRELIMINARY RESULTS SCE INVESTIGATION AT SHOP AND TEST o

SCE TECHNICAL CAPABILITIES o

GUIDELINES o

TEST RESULTS o

OBSERVATIONS CONCLUSIONS RECOMMENDATIONS

2

.- POS 52 b TEST

52.
  • ~

52~

ETTT 5?

BREAKER CLOSING CIRCUIT 52

-NEGVD 52 UNDERVOLTAGE a

.1?52 SHUNT TRIP 3

4 TRIP DEVICE T5 DEVIP IN4oo7 TU DEVICE 3

4 ELEMENTARY DIAGRAM FOR BREAKER CONTROL

UNDERVOLTAGE TRIP PADDLE SHUNT TRIP PADDLE TRIP.SHAFT TRIP SHAFT BEARING TRIP LATCH TRIP LATCH ROLLER T

TRIP SHAFT (OVER-CURRENT AND MANUAL TRIP PADDLES NOT SHOWN)

UNDERVOLTAGE TRIP PADDLE SHUNT TRIP PADDLE TRIP SHAFT TRIP SHAFT BEARING TRIP LATCH TRIP SHAFT BEARING C

TRIP LATC11 ROLLER MECHAA/IS4 TRIP LTCH ROLLER PIVOT RIP TIP.SHAFT TRIP LATCH TRIP LATCH ROLLER TRIP LATCH-READY TO TRIP TRIP LATCH-AFTER TRIPPED

TRIP SHAFT UNDERVOLTAGE TRIP PADDLE

  • +FRAME DOIL UNDERVOLTAGE TRIP DEVICE COIL ENERGIZED POSITION

TRIP SHAFT UNDER VOLTAGE TR IP PADDLE ARMATURE COIL UNDERVOLTAGE TRIP DEVICE COIL DE-ENERGIZED

IN-PLANT INVESTIGATION THREE TCB'S INSPECTED o

ONE THAT PASSED SURVEILLANCE TESTING o

TWO THAT FAILED SURVEILLANCE TESTING o

MARCH 13-16, 1983 PERSONNEL INVOLVED o

SCE-STATION AND ENGINEERING o

GENERAL ELECTRIC o

FRANKLIN RESEARCH CENTER o

NRC INSPECTIONS AND TESTS o

VISUAL INSPECTION o

OPERATIONAL TESTS o

TRIP SHAFT TORQUE MEASUREMENT o

UV DEVICE PICKUP AND DROPOUT MAINTENANCE o

CLEAN & LUBRICATE o

CHECK & ADJUST AS REQUIRED o

ADJUST UV PICKUP AS LEFT CONDITIONS o

MEASUREMENTS o

OPERATION

IN-PLANT INVESTIGATION TCB-2 PASSED SURVEILLANCE TESTING AS FOUND CONDITIONS o

OPERATION - SATISFACTORY o

TRIP SHAFT TORQUE -

1.5 TO 2.0 IN-LBS o

UV DEVICE PICKUP -

106.0 TO 108.1 SPECIAL INVESTIGATION o

REDUCED UV DEVICE PICKUP TO 100 VOLTS DC

o. SLUGGISH OPERATION - DELAY TRIP WORK PERFORMED o

CRC 5-56 APPLIED TO BEARINGS & LATCHES RESULTS o

TRIP SHAFT TORQUES - 1.19 IN-LBS o

OPERATION - SUCCESSFUL WITH UV DEVICE ADJUSTED TO 92 VOLTS DC

IN-PLANT INVESTIGATION TCB-1 FAILED SURVEILLANCE TEST AS FOUND CONDITIONS o

OPERATION -

INCONSISTENT/SLUGGISH o

TRIP SHAFT TORQUE -

1.5 TO 2.0 IN-LBS o

UV DEVICE PICKUP -

97.5 TO 103.7 VOLTS DC WORK PERFORMED o

ADJUSTED PICKUP VOLTAGE TO 106 o

CRC 5-56 APPLIED TO BEARINGS & LATCHES AS LEFT o

TRIP SHAFT TORQUE - 1.0 TO 1.3 IN-LES o

UV DEVICE - 95.5 TO 99.0 VOLTS DC o

OPERATION - POSITIVE UV TRIPS

IN-PLANT INVESTIGATION TCB-6 FAILED SURVEILLANCE TESTS AS FOUND CONDITIONS o

OPERATION - SLOW AND FAILED TO TRIP o

TRIP SHAFT TORQUE -

GREATER THAN 2 IN-LBS o

UV DEVICE PICKUP -

97.6 VOLTS DC SPECIAL INVESTIGATION o

INCREASED UV PICKUP TO 106.3 VOLTS DC o

-BREAKER TRIPPED BUT SLOW (2 SECONDS)

WORK PERFORMED o

CRC 5-56 APPLIED TO BEARINGS & LATCHES AS LEFT o

TRIP SHAFT TORQUE - 1.31 TO 1.56 IN-LBS o

UV DEVICE PICKUP - 98.6 TO 103.0 VOLTS DC o

OPERATION - POSITIVE UV TRIPS.,

SCE INVESTIGATION TEST PROCEDURE o

STATION WORK PACKAGE PERSONNEL o

APPARATUS ENGINEERS o

STATION MAINTENANCE o

STATION ENGINEERING o

STATION QC o

GE SERVICE ENGINEER TEST PROGRAM o

GUIDELINES DEVELOPED o

TEST RESULTS o

OBSERVATIONS

SCE INVESTIGATION TECHNICAL CAPABILITIES o

APPARATUS ENGINEERING SECTION o

APPARATUS SPECIFICATIONS o

QUALIFICATION o

VENDORS o

EQUIPMENT o

TESTS o

FACTORY o

ACCEPTANCE o

CIRCUIT BREAKERS o

PRODUCT SPECIALISTS o

FIELD TROUBLES o

PRODUCTS INVOLVED o

ELECTRICAL o

MECHANICAL o

SUBSTATION o

GENERATION o

DISTRIBUTION o

SHOP & TEST FACILITIES o

REPAIR FACILITIES o

TRANSFORMERS o

MOTORS o

CIRCUIT BREAKERS o

STANDARDS LABORATORY

SCE INVESTIGATION TCB-4 FAILED SURVEILLANCE TESTS AS FOUND CONDITIONS o

OPERATION o

INCONSISTENT - SOME FAILURES TO TRIP o

TRIP SHAFT TORQUE - 1.56 TO 2.0 IN-LBS o

UV DEVICE PICKUP - 93.7 TO 97.0 VOLTS DC o

SUCCESSFUL SHUNT TRIP AT 30.2 VOLTS WORK PERFORMED o

TRIP SHAFT & OPERATING MECHANISM o

REMOVED AND INSPECTED o

BAD LATCH ROLLER BEARING o

CLEANED AND LUBRICATED o

UV DEVICE o

REMOVED AND INSPECTED o

EXCESSIVE ARMATURE TO RIVET CLEARANCE o

CLEANED AND ADJUSTED o

CHECKED ADJUSTMENTS AS LEFT o

TRIP SHAFT TORQUE -

1.00 TO 1.44 IN-LBS o

UV DEVICE PICKUP -

104.5 TO 106.5 VOLTS DC o

OPERATION o

POSITIVE UV TRIP o

UV TRIP TIME - 60.1 TO 62.8 MSEC W/DIODE o

UV TRIP TIME - 28.6 TO 30.2 MSEC W/O DIODE o

NCR PREPARED FOR BAD LATCH ROLLER

RIIE

UV DEVICE EFFECT OF COIL TEMPERATURE ON PICKUP VOLTAGE COIL UV TEST TEMPERATURE PICKUP NO.

oC VOLTS DC 1

26.1 106.5 2

26.1 104.5 3

26.1 105.2 4

26.1 105.9 5

52,8*

125.7 6

52,8 124.9 7

52.8 123.8 THE 52.8C COIL SURFACE TEMPERATURE WAS OBTAINED AFTER THE COIL WAS ENERGIZED AT 130 VOLTS DC FOR ABOUT ONE HOUR.

SCE INVESTIGATION TIMING TEST RESULTS AS FOUND o

61.1 MSEC TO FAILURE TO TRIP AFTER ADJUSTING UV PICKUP FROM 93.7 TO 104.9 VOLTS DC o

61.6 TO 75.7 MSEC AFTER CLEANING TRIP SHAFT BEARINGS/LATCHES o

65.4 TO 70.3 MSEC AFTER CLEANING AND ADJUSTING UV DEVICE o

60.1 TO 62a8 MSEC OBSERVATION o

TIMING TESTS o

GOOD QUANTITATIVE MEASUREMENT o

NEED TO ESTABLISH LIMITS

BRKR CONTACT POLE I POLE 2 POLE3 UV TRIPI UV VOLTAGE i1LL IV 0 Ti IG AUX B' CONTACT TCB-4 AS FOUND CONDITIONS SUCCESSFUL UV TRIP

BRKP CONTACT POLE I m

POLE 2 POLE 5 I

UV COIL TRIP I UV VOLTAGE Ow IM NG AM AU CO TACB TCB-4 AFTER MAINTENANCE (WITH DIODE)

BRKR CONTACT POLE I

,:7*

POLE 2 POLE 3 vI I

I UV COIL TRAIPI MAIN-T mS UV VOLTAGE tLE-EMEP&6/ZED 6

  • IMN A X'B" 0ON CT"-

TCB-I AFTER MAINTENANCE (WITHOUT DIODE)

SUMMARY

OF INVESTIGATION

  • SHUNT TRIP DEVICE HAS SIGNIFICANT MARGIN AND CONSISTANTLY OPERATED SATISFACTORILY
  • THE UV DEVICE PERFORMANCE CAN BE AFFECTED BY SEVERAL FACTORS ITEM AFFECT
  • LUBRICATION OF TRIP SHAFT BEARINGS MAJOR AND LINKAGE AND LATCH POINTS
  • SETTING OF UV DEVICE PICKUP MAJOR VOLTAGE AT KNOWN TEMPERATURE
  • UV DEVICE ARMATURE TO RIVET MAJOR CLEARANCE
  • INSTALLATION OF DIODE MINOR
  • TRIP LATCH BEARING PROBLEM MINOR FOUND ON TCB-4 MEASURABLE PARAMETERS PROVIDE A GOOD INDICATION OF BREAKER OPERATION
  • UV TRIP TIME

RECOMMENDATION BASE-LINE MAINTENANCE

  • UV PICKUP VOLTAGE
  • UV TRIP TIME
  • REMOVE TRIP SHAFT AND MECHANISM
  • CLEAN, INSPECT, LUBRICATE PREVENTATIVE MAINTENANCE
  • ADJUSTMENTS
  • UV DEVICE-ARMATURE TO RIVET CLEARANCE
  • UV DEVICE PICKUP
  • UV DEVICE DROPOUT
  • TRIP SHAFT TORQUE SURVEILLANCE TESTS
  • UV TRIP TIME RECORD AND TRACK FOR EACH BREAKER

CONCLUSIONS o

FOR THE FOUR TCB'S INVESTIGATED, SUCCESSFUL OPERATION WAS OBTAINED IN ALL CASES BY ADJUSTING AND LUBRICATING o

OPTIMIZATION OF ADJUSTMENTS WILL PROVIDE MARGIN IN OPERATIONS o

QUANTITATIVE MEASUREMENTS CAN BE MADE TO MEASURE PERFORMANCE o

TRIP SHAFT TORQUE o

UV TRIP TIME o

THE UNDERVOLTAGE TRIP FUNCTION OF THE TCB CIRCUIT BREAKERS CAN PROVIDE RELIABLE OPERATION WITHOUT ANY DESIGN CHANGES IF APPROPRIATE MAINTENANCE AND SURVEILLANCE TECHNIQUES ARE USED

PREVENTATIVE MAINTENANCE PROGRAM FOR GENERAL ELECTRIC AK2-25-2 CIRCUIT BREAKERS o

GENERATION OF STATION PROCEDURE S023-1-4,66 o

S023-I-4.66 APPROVED 4/5/83 o

CONDUCT TRAINING OF STATION CRAFT WITH VENDOR CERTIFICATION o

COMPLETED CLASS ROOM TRAINING 3/31/83 o

COMPLETED IN PLANT PHASE 4/6/83 o

IMPLEMENT PREVENTATIVE MAINTENANCE PROCEDURE S023-I-4.66 o

COMMENCED PROCEDURE 4/6/83 o

ESTIMATED COMPLETION OF PROCEDURE 4/10/83 o

EVALUATION OF DATA TO ACCESS ADEQUACY OF PREVENTATIVE MAINTENANCE FREQUENCY

PREVENTATIVE MAINTENANCE PROCEDURE S023-1-4.66 OBJECTIVE

  • PROVIDES DETAILS FOR INSPECTION, CLEANING ADJUSTMENTS AND TESTING OF AK-2-25-2 CIRCUIT BREAKERS
  • SECTIONS 6.1, 6.2; 6.4; 6.6 THROUGH 6.9 AND 6.11 WILL BE PERFORMED EVERY FOUR (4)

MONTHS

  • PROCEDURE SHALL BE PERFORMED IN ITS ENTIRETY AT LEAST ANNUALLY

PROCEDURES

  • 6.1 REMOVE BREAKER FROM CUBICLE
  • 6.2 "AS FOUND" INSPECTION (4 MONTH INTERVAL)
  • OBTAIN PICK UP VOLTAGE OF THE UV DEVICE WHEN AT AMBIENT AND AT TEMPERATURE
  • MEASURE OPENING TIME OF CIRCUIT BREAKER - CONDUCT THREE TIMES
  • 6.3 BREAKER INSPECTION AND CLEANING (ANNUAL)
  • 6.4 TRIP TORQUE VERIFICATION AND CLEANING (4 MONTH INTERVAL)
  • CLEAN TRIP-LATCH SURFACES
  • FINAL TRIP TORQUE MEASUREMENTS
  • 6.5 BREAKER MECHANICAL OPERATION CHECKS AND ADJUSTMENTS (ANNUAL)
  • INSPECT/ADJUST CONTACT WIPE CLEARANCE
  • MEASURE CONTACT SPRING COMPRESSION ON EACH POLE
  • 6.6 CHECK UNDER-VOLTAGE DEVICE FOR ARMATURE CLEARANCE (4 MONTH INTERVAL)
  • VERIFY CLEARANCE BETWEEN ARMATURE ARM AND RIVET - VERYIFY FREEDOM & MOVEMENT
  1. ADJUST ARMATURE CLEARANCE TO:A.AO6"
  • 6.7 CHECK INSTANTANEOUS UNDER-VOLTAGE PICKUP AND TRIP SETTINGS ( 4 MONTH INTERVAL )
  • 6.8 POSITIVE TRIP CHECK AND ADJUSTMENTS ( 4 MONTH INTERVAL
  • 6.9 TRIP LATCH ADJUSTMENT ( 4 MONTH INTERVAL )
  • 6.10 POST-MAINTENANCE TESTING ( ANNUAL )
  • PERFORM INSULATION-RESISTANCE CHECKS
  • MEASURE THE CONTACT RESISTANCE FOR EACH PHASE
  • 6.11 REINSTALL BREAKER
  • 6.12 RESTORATION AND POST-MAINTENANCE CHECKS (4 MONTH INTERVAL )

REACTOR TRIP BREAKER SURVEILLANCE PRE -

MARCH 1983 PLANT PROTECTION SYSTEM TEST o

MONTHLY TEST REQUIREMENT o

TESTS SHUNT AND UV TOGETHER o

GO-NO-GO TEST SUPPLEMENTAL TEST o

TESTS SHUNT AND UV SEPARATELY o

REQUIRED BY TECHNICAL SPECIFICATION ON EIGHTEEN MONTH CYCLE o

PERFORMED MORE FREQUENTLY DURING INITIAL STAGES OF STARTUP o

GO-NO-GO TEST

REACTOR TRIP BREAKERS SUPPLEMENTAL TEST o

EXISTING TEST o

GO-NO-GO TEST OF UV DEVICE o

GO-NO-GO TEST OF SHUNT DEVICE o

REVISED TEST o

RESPONSE TIME TEST OF UV DEVICE o

DETECTION OF ONSET OF DEGRADED PERFORMANCE o

INITIAL AND FINAL ACCEPTANCE CRITERIA o

GO-NO-GO TEST OF SHUNT DEVICE

REACTOR TRIP BREAKERS SURVEILLANCE TEST PROGRAM MONTHS 4

8 12 23 MAINTENANCE A

0 A

0 SURVEILLANCE ooooo MONTHLY 0 0 0 0 0 BI-MONTHLY 0

0 0 0

0 QUARTERLY 0

0 0

SEMI-ANNUAL o = SURVEILLANCE TEST 0 = FULL PREVENTIVE MAINTENANCE

^= PREVENTIVE LUBRICATION OF TRIP BAR BEARINGS

QW C.'

C Cs,-

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