ML20011F351
| ML20011F351 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Haddam Neck |
| Issue date: | 08/29/1985 |
| From: | CONNECTICUT YANKEE ATOMIC POWER CO. |
| To: | |
| Shared Package | |
| ML20008D796 | List: |
| References | |
| FOIA-89-404 PM-9.5-41, NUDOCS 9003050184 | |
| Download: ML20011F351 (8) | |
Text
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FMP 9 3-41 f
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'Conootticut Yankee 1
Prevestive Maintenance Procedure
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TESTING OF N01.DED CASE CIRCUIT BREAKFJL
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h" 1.1 This procedure provides the steps necessary to test the overload tripping of Westinghouse type RFA, NFS, FA, or F3 circuit breakers.
2.0 LICERSE OR ADMINISTRATIVE REQUIREMENTS 6
2.1 FDSA Section 9.4.2.
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2.2 Technical Specifications Section 3.12.
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l 3.0, REFERENCES 3.1 Connecticut Yankee Accident-Prevention Manual.
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4.0 FREREQtTISITts '
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4.1 This procedure could be used to perform preventive maintenance on any
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molded case circuit breaker at Connecticut Yankds, aone of which are l
safety related. Therefore, the shift Superviset shall sign the a
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Checkoff to acknowlsdge that involved reactor operational personnel j
are aware of wbst safety related equipment is being taken out of or t
returned to service. If redundant equipment is required to be in
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service while a breaker is being worked on, the shif t Supervisor shall L
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sign the checkoff to acknowledge verification of the operability of j
p the redundant equipment.
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4.2 Work Order issued.
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4.3 Equipment to be tested disconnected from bus and load with line and C
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lor.d side leads tagged and disconnected.
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AUG 291985
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q 4.5 Aftee completies of att work or testing, the shift supervisor shall
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g related equipeest assesisted with breaker worked on, prior to
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..h returning equipmest ta service.
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5.0 PRECAUTIONS I
L 3.1 Mark all connections before disconnecting.
f-5.2 Check all wires with voltage tester prior to removing for testing.
5.3 Ensure motor controller or breaker assembly is returned to N.C.C. and h
I locked in af ter completion of testing.
{"i" 4.0 PROCEDURE
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6.1 Draw wiring diagram of breaker couperteent wiring. Use Attachment 3 -
k' lasic Cubicle Diagree.
6.2 QC Required, Inspector to verify wiring diagram correct.
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6.3 Disconnect *rires and remove breaker compartment from the MCC.
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6.4 Disconnect wires from phase A and close the breeker.
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6.5 Connect test leads to phase A pad apply 300% of the rated current of the breakar.
ja 6.6 Record trip time on Check het and compare with table in Attachment 2.
6.7 Close the breaker.
6.3 Apply 15002 of the rated current of the breaker to phase A.
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p 6.9' Record the trip time on the, Check List and verify less than 1.0 seconde.
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6.10 Disconnect test leads and reconnect compartment wires for phone A.
P 6.11 Wait at least 5 minutes and then repeat steps 6.4 through 6.10 for I.
h P ase B.
i 6.12 Wait at least 5 minutes and then repeat stepe 6.4 through 6.10 for i
1 phase C.
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6.13 Install breaker compartment and connect wires per viring diagram froa I
Step 6.1.
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6.14 QC Required Inspector to verify wiring connected per wiring diagram
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i-from Step 6.1.
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7.1 Involved reactor operatismal personnel have been informed of what breaker la being
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7.2 Redundanc equ1pment operability verified 1.
per Step 4.1.
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7.3 prcrognisites met per stepe 4.3, 4.4 and 4.5.
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i precautione read and understood.
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Scope of work understood by all involved.
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7.6 Wires disconnected and breaker compartment removed if' q.
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per Step 6.3.
t 7.7 Breaker closed, leads connected to phase A, and L *;Y '
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3002 test current applied to phase A per Steps 6.4 and 6.5..
7.8-Trip time phase A agrees with table in h"6.
Time Q..
7.9 Breaker elooed and 15002 m, i 19 test current applied to phase "A"per Step 6.7 and 6.8.
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7.10 Trip time is less than one second.
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7.11 Test leads disconnected per Step 6.10.
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' 7.12 Independent verification of trip times for A phase.
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t 7.13 Breaker closed, leeds connected to phase B, and
.'M 3002 test current applied to phase B per Steps
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7.14' Trip time phane 8 sgrees with table in l:n' i
Attechneet 2.
Time ik.
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test current applied to phase 8 per Step 6.11.
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7.16 Trip time
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7,17 Test 1cada disconnected per Step 6.11.
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l 7.18 Independent verification of trip times for 8 phase.
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r 7.19 Breaker closed, leads connected to phase C. and 3002 test current applied to phase C per Steps 3 *,
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7.20 Trip time phase C agrees with table in Attachsent 2.
Time S.*
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7.21 Breaker elooed and 15002 *
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test current applied ta phase C.per Step 4.12
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Time.
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7.23 Test leads disconnected per, Step 6.12.
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7.25 Breaker assembly installed and wires connected as per l, ;.:,
diagram of 8ttp 6.1.
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7.26 QC Required Inspector te verify wires connected as r..
vs' n per diagram of Step 6.1.
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Q.C. Inspector Q.;'d 7.27 Equipment operability verified per Step 4.6.
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$$,M' Shitt Supervisor Date YW 7.28 Involved reactor operation personnel have T.W r
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been informed of what breaker le being VT,
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removed to service per Step 4.1.
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