ML20205F290

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Rev 6 to Preventive Maint Procedure PM 9.5-40, Periodic Functional Test of Reactor Trip Breakers
ML20205F290
Person / Time
Site: Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date: 02/24/1984
From:
CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
ML20198A483 List:
References
PM-9.5-40, NUDOCS 8511050292
Download: ML20205F290 (10)
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Text

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'PERATIONS REVIEW COMMITTEE APPROVAL:

Connecticut Yankee Preventive Maintenance Procedure Qj - , .

g No. PM 9.5-40 f b _- '

Maintenance PERIODICAL FUNCTIONAL TEST OF 4"!

REACTOR TRIP BREAKERS

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EFFECTIVE DATE '

1.0 OBJECTIQ b ~

1.1 This procedure provides the steps necessary to perform periodic functional test on reactor trip breakers.

2.0 LICENSE OR ADMINISTRATIVE REOUIREMENTS 2.1 Nonapplicable.

3.0 REFERENCES

3.1 Westinghouse Instruction Book Rod Power Supply (CY File M-I-W-3-21),

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3.2 Westinghouse Letter CYS-74-24 dated April 4, 1974.

3.3 Connecticut Yankee Accident Prevention Manual.

3.4 Production Plant Instructions for Clearance Tagging, Electrical and Mechanical.

3.5 Westinghouse Letter, NSD-TB 83-02 Rev. 1 & 83-03. l 4.0 PREREOUISITES 4.1 The Shift

  • Supervisor shall sign the Checkoff to acknowledge that involved reactor operational personnel are aware that the reactor trip breakers are being taken out of or returned to service.

4.2 Reactor shutdown all control rods fully inserted.

4.3 Rod power supply system tagged out in accordance with the attached Tag List.

4.4 Work Permit has been issued.

4.5 Necessary equipment for cleaning and testing reactor trip breakers

. available.

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5.0 PRECAUTIO."S

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5.1 Ensure reactor trip breakers are oeenergized before cleaning and inspection.

5.2 Keep hands clear of moving parts of breakers when breakers are required to be operated.

5.3 ' Comply with Production Plant Instruction for Clearance Tagging.

Electrical and Mechanical.

6.0 PROCEDURE

  • 6.1 P.rior to_ performing any maintenance operate the breakers manually and observe that the undervoltage trip device trips the breaker. Record on Check List.

6.2 Clean the reactor trip breakers and the rod power supply MG set isolation breakers with vacuum cleaning and dusting with a brush.

6.3 Visually. inspect the breakers and entire enclosure for broken parts, loose bolts, or excessive wear.

6.4 Remove the undervoltage trip device for each breaker to be tested and operate the device manually. Observe manual operation for stickiness or binding. Record on Check List.

6.5 Remove old lubricant from the undervoltage trip device by cleaning with a solvent suitable for use on electrical equipment.- (" Swoosh",

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'enetone, Arco Cleaner, etc.).

NOTE: Do not apply the solvent to coils, vires, or other ,

electrically insulated parts. i 6.6 Liberally apply lubricant to identified points of the UVTA. (See attachment II for lubrication points.) Manually exercise the UVTA while lubricant is being applied.

NOTE:

  • Insure that lubricant is thoroughly mixed prior to application. Lubricant to be Westinghouse 53701 GW or Molykote M-88.

6.7 Reinstall the -undervoltage trip devices. ll 6.8 HOLD POINT NO. 1 - No work to proceed beyond this point until i inspector has inspected breakers. Record results on Inspection Plan.

4 6.9 Operate each breaker manually and observe that it's undervoltage trip

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device trips the breaker. '

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,p 7.0 TESTING 7.1 Establish ce=munications between s.itchgear and the control rocu.

7.2 If a red tag clearance was issued, remove the tagging. If a blue tag clearance was issued continue with Step 7.3.

7.3 Start both rod drive M.G. sets and adjust and output voltage to 125 VCD. Do not close the M.G. set isolation breakers.

7.4 Remove the fuses from the shunt trip circuits on A and B reactor trip

, breaker.

7.5 'Close one M.G. set isolation breaker.

7.6 Close A and B reactor trip breakers from the main control board.

7.7 Trip the reactor trip breakers from the main control board. Observe undervoltage trip device operation and that reactor trip breakers A and B open.

7.8 Repeat Step 7.6. -

7.c Repeat Step 7.7.

7.10 Open the M.G. set isolation breakar.

7.11 Install new fuses in the undervoltage trip circuit and the shunt trip circuits for A & B reactor trip breaker (6 fuses required).

NOTE: "A" trip circuit fuse ASFU1 and ASFU2 "B" trip circuit fuse BSTUI and BSFU2 Under voltage trip circuit fuse UVFU1 and UVTU2 7.12 Apply blocking to the reset lever of the undervoltage trip devices on both reattor trip breakers.

Enter in jumper log.

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7.13 Close one M.G. set isolation breaker.

NOTE: Have control room insure there are no reactor trip signals prior to step 7.14.

4 7.14 Close reactor trip breakers A and B from the main control board.

7.15 Trip reactor trip breakers A and B from the main control board.

7.16 Repeat Step 7.14.

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7.17 Repeat Step 7.15.

.G 7.18 Open the MG set isolation breakers.

7.19 Remove blocking on the undervoltage trip devices on reactor trip breakers A and B, clear entry from jumper log.

7.20 Close both MG set isolation breakers.

7.21 Close reactor trip breakers A and B from the main control board.

7 22 Trip reactor trip breakers A and B from the main control board.

7.23 Repeat Step 7.21 and 7.22 ten times.

l 7.24 If the inspection and test was satisfactory, clear all tagging and I complete required sections of Work Permit.

7.25 If any part of the inspection or test was unsatisfactory notify the Job Supervisor. l 7.26 Clear tagging if not cleared in Step 7.23. l j

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-Pr.rentive Ma:nterance Procecure No. PM 9.5-40

?IRICLIC cedCT!CKAL TEST OF REACTOR TRIP BREAKERS 8.0 CHECKLIST INITIALS 8.1 Involved-teactor operational personnel have been informed that reactor trip breakers are being removed from service per Step 4.1.

5hif: Supervisor Date 8.2 Reactor shut down, all rods inserted, per Step 4.2.

8.3 Rod power supply system tagged out per Step 4.3.

8.4 Precautions read and under" stood.

8.5 Res tor trip breaker undervoltage trip devices

.did/did not trip the breakers per Step 6.1.

8.6 Undervoltage trip devices operate satisfactorily per Step 6.4.

l f7) 'd' 8.7 Undervoltage trip devices on both reactor trip breaker relubricated per Step 6.6. - l 8.8 Undervoltage. trip devices on both MG set isolation treakers relubricated per Step 6.6. l 8.9 Visual inspection satisfactory per Step 6.6.  ;

8.10 Undervoltage trip devices reinstalled per Step 6.7.

g 8.11 The undervoltage trip devices trip the reactor trip breakers,per Step 6.9.

l 8.12 The undervoltage trip devices trip the MG set isolation breakers per Step 6.9.

l 8.13 Communications established with control room per Step 7.1.

8.14 Tagging cleared (if applicable) per Step 7.2.

8.15 Both rod drive MG sets started per Step 7.3.

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3. 6 Tuses re=;cel 2r:: ahu .t :r*p cir:ci:s en A 5 3 Reactor trip breakers per Step 7.4 8.17 One MG set isolation breaker closed.

8.18 A & B reactor trip breakers closed per Step 7.6.

8.19 A & B reactor trip breakers opened undervoltage trip devices operate properly per Step 7.7.

8.20 A & 3 reacter trip breakers close per Step 7.2.

8.21 A & B reactor trip breakers open. Undervoltsge trip devices operate per 7.9.

8.22 The MG set isolation breakers open per Step 7.10.

8.~23 New fuses installed in the undervoltage and shunt trip circuits per Step 7.11.

8.24 Blocking applied to undervoltage trip devices on both reactor trip breakers per Step 7.12 and entered in jumper log.

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8.25 One MG-isolation breaker closed per Step 7.13.

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8.26 A & B reactor trip breakers close per Step 7.14.

8.27 A & B reactor trip breakers trip per S'tep 7.15.

8.28 A & B reactor trip breakers close per Step 7.16.

8.29 A & B reactor trip breakers trip per Step 7.17.

8.30 The MG set isolation breakers open per Step 7.18.

s 8.31 Blocking removed on the undervoltage trip devices.

Jumper Log entry clear per Step 7.19.

8.32 Both MG set isolation breakers close per Step 7.20.

8.33 A & B reactor trip breakers close per s'tep 7.21.

8.34 A & B reactor trip breaker trip per Step 7.22. __

8.35 A & B reactor trip breakers tested per Step 7.23.

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. I!!!TIALG 8.36 Test ano inspection satisfactory, tagging cleared -

per Step'7p24.

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' 8.37 Test and dispection unsatisfactory, Job Supervisor I notified per Step 7.25.

8.38 Tagging cleared. I j 8.39 Retest required.

Job Supervisor 8.40 The Shift Supervisor shall acknowledge the testing of I section 7.0, has been completed and that he has cycled both reactor trip breakers and observed that i

they operate properly to prove equipment -

operability.

Shift Supervisor 8.41 Involved reactor operational personnel have been I informed that reactor trip breakers are being returned to service per Step 4.1.

4 Shift Supervisor Date

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c 9.0 ACCEPTANCE CRITERIA

9.1 Reactor trip breakers A & B undervoltage and shunt trip devices trip the breakers.

9.2 MG set isolation breakers undervoltage trip devices trip the J

breakers when operated manually.

Date Recorded

  • by Electrician Date Approved by Job Supervisor Date 1

Reviewed by Department Head Date

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AT~AC":-CT 1 TAG LIST TOR PERICDI" Ti.'NCTIONAL TEST OF REACTOR TRIP BREAKERS 4

Tag Title Location Position Color

1. MG1-1A 480V Supply Breaker Bus 4-3A Open Red / Blue
2. 1.'G-1A 4dGV Supply Breaker DC Control Knife Switch Bus 4-1C Op'en Red / Blue
3. "A" Isolation Breaker close Rod Power Pushbutton. Supply A Off Red / Blue
4. "A" Start Regulator
  • Rod Power Pushbutton Supply A Off Red / Blue
5. MGi-1B 480V Supply Breaker Bus 7 16A Open Red / Blue
6. MGI-1B 480V Supply Breaker DC Control Knife Switch Bus 7-18C Open Red / Blue eph
7. "B" Isolation Breaker close Rod Control

-62 Pushbutton Supply B, Off Red / Blue

8. "B" Start Regulator Rod Control Pushbutton ' Supply B Off . Red / Blue
9. Breaker No. 12 1A DC Bus Off Red / Blue e

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WORK PE Ruli NO. SY ST E M PAGE Rod Control 1 or l PROCE DURE NO. COMPONENT PAR T ~ ~ ~ ~ ' - ' ' ~

PM 9.5-40 REACTOR TRIP AND ISOLATION BREAKERS PROCEDURE _ _ _ _ __

ITEMS To BE INSPECTED IN5PECTION RESULT 5 LiHE NO. INSPECTOR SIGNATURE isATE Inspect and verify all breakers tested arc ready to be returned to service.

6.8 "lA" isolation breaker 6,8 "lB" isolation breaker 6.8 "A" reactor trio breaker 6-8 "B" reactor trip brecker Verify all taes cleared. and all breakers and switcites __ _ ._ .._

tanned out have been returned to.' normal. __ _ . . _ _

Verify all fuses re-installed.

l REYlEWED 3Y CYQ A DEPT. DATE

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