ML20092H854
| ML20092H854 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 06/30/1989 |
| From: | GEORGIA POWER CO. |
| To: | |
| Shared Package | |
| ML20092F288 | List:
|
| References | |
| CON-IIT05-110-000F-90, CON-IIT5-110-F-90, RTR-NUREG-1410 22336-C, NUDOCS 9202210389 | |
| Download: ML20092H854 (10) | |
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NUCLEAR OPERATIONS 222ao-C
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DIFFERENTIAL PRESSURE SWITCH CALIBRATION ya
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VICP 22336-C 2
2 of 10 1.0 PURPOSE rr y
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The purpose of this procedure is to provide t
instructions for calibration of Differential Pressure v
Switches.
2.0 PRECAUTIONS AND LIMITATIONS N
2.1 All steps in this procedure are to be performed in sequence except as noted.
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2.2 Performance of procedure steps, as identified by a double asterisk
(*/*), shall be initialed on
" Checklist" except when recording data on Data Sheet.()
2.3 The instrument may be located in a radiation area, service a contaminated process, or be contaminated.
If follow instructions on " Radiation Work Permit".
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2.4 Any calculations necessary for the performance of this procedure shall be shown on " Calculation Sheet".
(1 2.5 For Safety-Related systems, an Independent Restoration Verification shall be performed, after completion of Test / Calibration, and initialed in " Restoration Verification" section of " Checklist".
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2.6 Ensure that each lead (wire) to be lifted is marked
(~)x with a completed and installed Jumper and Lifted Wire q_
tag.
Instead of " Control.No." the " Procedure No."
should be identified on the tag.
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2.7 If this procedure is completed and tempor*"
must remain installed and/or lif ted wire (s)y jumper (s) cannot be reconnected, a Jumper and Lifted Wire Clearance must be obtained per Procedure 00306-C, " Temporary Jumper And Lifted Wire Control".
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2.8 For Non-Safety Related systems, QC Hold Points may be marked non-applicable (N/A) on " Checklist".
2.9 This procedure ma operational mode.y be performed in any plant
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2.10 If, during performance of this procedure, any of the following occur, immediately notify I&C Forem:Ant 2.10.1 Any personnel error, procedure inadec uacy ov malfunction is identified which coulc. prev,ent fulfillment of " Acceptance Criteria".
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2.10.2 Any test exceeds specified limits.
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VEGP 22336-C 2
3 of 10 3.0 PREREQUISITES OR INITIAL CONDITIONS 3.1 Notify Shift Suaervisor, or designee, of work to be
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performed and c:3tain signature authort:ation.
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3.2 Notify Reactor Operator (RO) that instruments
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associated with switch may be erratic or inoperable during performance of this procedure and obtain RO signature.
(1 3.3 TEST EQUIPMENT 3.3.1 Triplett Model 630 PLK Multimeter or equivalent.
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3.3.2 Variable Pressure Source.
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3.3.3 Pressure Test Gauge.
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3.4 Verify all Prerequisites or Initial Conditions are
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met.
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4.0 MAIN BODY 4.1 CALCULATIONS 4.1.1 Obtain instrument setpoint data from appropriate
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controlled document (s) and record document number in
" Comments" section of " Data Sheet".
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4.1.2 Calculate expected values and record in " Expected"
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section of " Data Sheet".
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4.1.3 Calculate Hi and to limit values and record in "Hi
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Limit" and "Lo Liait" sections of " Data Sheet".
(1 4.2 REMOVAL FROM SERVICE 4.2.1 Close high pressure isolation valve.
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4.2.2 Open equalizing valve.
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4.2.3 Close low pressure isolation valve.
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VEGP 22336-C f
2 4 of 10 WARNING l
ANY TRAPPED FLUID VENTED DURING
- t ISOLATION FROM OR RESTORATION
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TO SERVICE MAY BE CONTAMINATED.
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4 A SUITABLE CONTAINER, AS
/ RECOMMENDED BY THE HEALTH
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PHYSICS DEPARTMENT SRALL BE s
USED TO ENTRAP THIS FLUID.
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THE FLUID SHOULD BE DISPOSED 0F -IN ACCORDANCE WITH HEALTH PHYSICS DEPARTMENT PROCEDURES.
4.2.4 Vent D/P avitch to slowly bleed pressure, then close vent.
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4.2.5 Open input test ports.
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4.3 CALIBRATION 4.3.1
. Disconnect D/P switch lead wires as required.
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(If Safety-Related, an Independent Verification is required.)
(1 4.3.2 Close equalizing valve.
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4.3.3 Connect pressure source, test gauge and DMM to D/P switch as required.
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NOTE During calibration one side of D/P switch-is vented while pressure is applied to the opposite side.
4.3.4 Adjust pressure source until D/P switch trips and
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record pressure in "As Found" section of " Data Sheet".
(1 4.3.5
- Adjust pressure source until D/P switch resats and
- /*
record pressure in "As Found" section of " Data Sheet".
(1 4.3.6 If As Found values are within limits specified on
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" Data Sheet" and more accurate values are not desired, record values in "As Left" section of " Data Sheet" and proceed to step 4.3.11.
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4.3.7 QC Hold Point s
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Obtain QC authorization to proceed before continuing with procedure.
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VEGP 22336-C 2
5 of 10 4.3.8 If As Found values are not within limits specified on
" Data Sheet" or more accurate values are desired, proceed as follows:
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If not already performed, connect DMM acrcss a.
correct D/P switch terminals.
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b.
Adjust as required to obtain correct values.
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Adjust pressure source until D/P switch trips.
c.
Note pressure.
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d.
Adjust pressure source until D/P switch resets.
Note pressure.
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e.
Repeat steps 4.3.8b thru 4.3.8d until no further adjustments are necessary.
(1 4.3.9 Adjust pressure source until D/P switch trips and
- /*
record pressure in "As Left" section of " Data Sheet".(l 4.3.10 Adjust pressure source until D/P switch resets and
- /*
record pressure in "As Left" section of " Data Sheet".[]
4.3.11 If D/P switch has more than one switch contact, repesi steps 4.3.3 through 4.3.10 as required.
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4.4 RESTORE TO SERVICE
(_)
4.4.1 Reduce test pressure to zero psig.
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4.4.2 Disconnect all test equipment connected during course
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of this procedure.
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4.4.3 QC Hold Point
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Obtain QC authorization to proceed before continuing with procedure.
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4.4.4 Reconnect lead wires to switch.
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F 4.4.5 Close input test ports.
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4.4.6 Open equalizing valve.
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4.4.7 Slowly open low pressure isolation velve.
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NOTE Air must be vented from all switches
('S used in liquid service.
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VEGP 22336-C 2
6 of 10 4.4.8 Close equalizing valve.
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4.4.9 Slowly open high pressure isolation valve.
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4.4.10 Inspect valves, tub:.ng and instrument for leaks.
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Immediate action shal! be taken to correct any leaks fcund.
(1 4.4.11 Verify switch reflects current plant conditions after
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it is restored to service.
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4.4.12 For Safety Related systems, have an Independent
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Restoration Verification performed by designated personnel.
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4.4.13 Notify RO switch has been returned to service.
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4.4.14 Notify Shift Supervisor, or designee, of completion of
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work including test
" Completion Sheer.". results and obtain signature on
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5.0 ACCEPTANCE CRITERIA 5,1 The Acceptance Criteria for this procedure is the D/P switch is within specified limits listed on Data Sheet.
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Satisfactory completion of this procedure has been met t
when I&C Foreman has evaluated data obtained per Acceptance Criteria of this procedure, rnviewed, and signed Data Sheet provided.
6.0 REFERENCF.S 6.1 Instruction Manual for Appropriate Switch under test.
6.2 Appropriate Electrical and Mechanical Drawings required for calibration of instrument.
6.3 Procedure 00306-C,
" Temporary Jumper And Lifted Wire Control' END OF PROCEDURE TEXT FOR M O o
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DATA SHEET I
Instr. No.
SHEET 1 OF 1 Location Serial No.
Description D/P Switch Manufacturer Model No.
NOTES: N/A ACTION INPUT EXPECTED LO LIMIT HI LIMIT AS FOl'ND AS LEFT Switch Trips Switch Resets ACTION INPUT EXPECTED LO LIMIT HI LIMIT AS FOUND AS LEFT Switch Trips Switch Resets ACTION INPUT EXPECTED LO LIMIT HI LIMIT AS FOUND AS LEFT Switch Trips Switch Rosets
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ACTION INPUT EXPECTED LO LIMIT HI LIMIT AS FOUND'l AS LEFT Switch Trips
~'l Switch Resets
- 1 1 TEST EQUIPMENT COMMENTS:
I.D.
NO.
MODEL NO.
CALIBRATION DUE DATE
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" ' d1 PERFORMED BY:
b)E REVIEWED BY:
DATE/
l APPROVED BY:
DATE
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VEGP 2233b-C 9
I 8 of 10 Shcot 1 of 1 CAI.CULATION SHEET Show all calculations performed during course of this procedure in the space below.
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Completed by:
Date Reviewed by:
Date _
Approved by:
Date r-j d 4
VEGP 22336-C 3
9 of 10 CHECKLIST 3.1 Shift Supervisor Authorization SHEET 1 0F 1 v
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Sigr4a turs Date 3.2 Reactor Operator (RO) Notified
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Signature Date STEP VERIFICATION Step /Substep Initia l Step /Substep Init UT 3.4 Prerequisites are 4.4.5 Test ports met closed 4.3.1 D/P switch lead 4.4.6 Equalizing valve wires disconnected open 4.3.1 Independent 4.4.7 LP isolation Verification valve open 4.3.7 QC Notified 4.4.8 Equalizing valve closed 4.4.2 Test equipment disconnected
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4.4.9 HP isolation 4.4.3 QC Notified c)-
4.4.4 Lead wires 4.4.10 Leak inspection
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ccnnected performed 4.4.11 Switch reflects current plant conditions RESTDRATION VERIFICATION Initial L
Lead wires connected Initial 5.
Input test ports closed 2. LP isolation valve open 3. Equalizing valve E" ] 'M closed
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4. HP isolation valve
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Date:
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v M,P 44336-C 2
10 of 10 Shoot 1 of 1 COMPLETION SHEET I
PROCEDURE TITLE DIFFERENTIAL PRESSURE SWITCH CALIBRATION _
TIME TEST STARTED BY DATE DEFICIENCIES OCCURRED AND ACTIONS TAKEN
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TEST RESULTS:
ACCEPTABLE []
UNACCEPTABLE []
SWITCH RESTORED TO SERVICE
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SWITCH COMMITTtD TO REPAIR
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TEST COMPLETED BY TIME DATE SHIFT SUPERVISOR NOTIFIED Signature Time Date REVIEWED BY:
DATE APPROVED BY:
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DATE y/
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