ML20092H819
| ML20092H819 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 08/30/1989 |
| From: | GEORGIA POWER CO. |
| To: | |
| Shared Package | |
| ML20092F288 | List:
|
| References | |
| CON-IIT05-110-000D-90, CON-IIT5-110-D-90, RTR-NUREG-1410 22332-C, NUDOCS 9202210371 | |
| Download: ML20092H819 (10) | |
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I-i TEMPERATURE SWITCH CALIBRATION
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VEGP 22332-C 2
2 of 10 1.0 PURPOSE jf
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The purpose of this procedure is to provide instructions for Calibration of a Temperature Switch.
2.0 PRECAflTIONS AND LIMITATIONS 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 step, as identified by a double asterisk (*/*),
shall be initialed on
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" Checklist" except when recording data on Data Sheet.()
2.3 The instrument may be located in a radiation area, service a contaminated process fluid, or be contaminated.
If so, follow instructions on " Radiation Work Permit".
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2.4 For Safety-Related Systems, an Independent Restoration Verification shall be performed after completion of Test / Calibration and initialed in " Restoration Veri.fication" section of " Checklist".
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2.5 Any calculations necessary for the performance of this proceoure shall be shown on " Calculation Sheet".
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(_))
i 2.6 Ensure that each lead (wire) to be lifted is marked with a completed and installed jumper and lif ted wire 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 temporary jumper (s) must remain installed and/or lifted wire (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 Minimize entry of foreign materials or dirt into the working parts of the instrument.
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2.9 If, during performance of this procedure, any of the following occur, immediately notify I&C Foreman.
2.9.1 Any perscnnel error, procedure inadecuacy, or malfunction is identified which coulc, prevent fulfillment of " Acceptance Criteria".
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2.9.2 Any test exceeds spe.cified limits.
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VEGP 22332-C 2
.1 o f 10 2.10 This procedure may be performed in any plant i
f-operational mode.
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l 3.0 PREREQUISITES OR INITIAL CONDITIONS 3.1 Notify Shift Saservisor, or designee, of work to be
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performed and o'atain signature authorization.
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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 t
signature.
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.._7 3.3 TEST EQUIPMENT REQUIRED
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"* g 3.3.1 Temperature Bath 9
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3.3.2 Fluke 2175A Digital Thermometer or equivalent
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3.3.3 Triplett Model 630 VOM or equivalent
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3.4 Verify all Prerequisities or Initial Conditions are
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met.
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4O 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 (s) in "Consnents" section of " Data Sheet".
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4.1.2
" Input" and " Expected" put and expected values in Calculate and record insections of " Data Sheet".
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4.1.3 Calculate Hi and Lo Limits and record in "Hi Limit" and
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"Lo Limit" sections of " Data Sheet".
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4.2 REMOVAL FROM SERVICE NOTE The length of capillary insnersed in temperature bath must be the same as length of l
capillary immersed in process.
4.2.1 Close isolation valve (if applicable).
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22332-C 2
4 of 10 i
.2.2 Disconnect lead wires from switch as required.
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(Independent Verification required for safety-related O
systems) 4.2.3 Remove temperature sensing element from thermowell
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and/or holding apparatus as necessary.
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4.3.
CALIBRATION
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-J, 4.3.1 Place temperature sensing element and Fluke digital
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thermometer in temperature bath.
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4.3.2 Connect VOM across appropriate terminals to monitor
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contact action of switch under test.
4.3.3 Adj us t temperature bath to a point at which VOM M."
indicates contacts are in reset condition.
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NOTE As setpoint is approached
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temperature bath should
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P]i4 be. adjusted in smaller F increments, allowing 3
temperature to stabilize F
after each adjustment of p,
temperature bath and prior 4Q to obtaining data and i
switch conditions.
4.3.4 Adjust-temperature bath to point at which required trip point it indicated b
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value in "As Found" y VOM and record-temperature bath section of " Data Sheet".
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t 4.3.5 Adjust - temperature bath to point at which required
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reset-contact action is indicated by' VOM and record tempe sture-bath value in "As Found section of " Data Sheet
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4.3.6 If required, connect VOM to additional switch contacts and repeat steps 4.3.3 thru 4.3.5.
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4.3.7 If,As-Found readings are within limits specified on J
" Data Sheet" and more accurate readin
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desired, record readings in "As Left"gs are not section of " Data Sheet" and proceed to appropriate subsection.
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VEGP 22332-C 2
5 of 10 4
4.3.8 If As Found readings are not within limits specified on
" Data-Sheet", or more accurate readings are desired, O
proceed as follows:
a.
Ensure that VOM is connected across correct switch terminal.
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7 temp' Data Shee t".erature bath to setpoint value as b.
Adj us t
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c.
Adj us t switch as re utred to obtain correct
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G contact action as i dicated by VOM.
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df Adj us t temperature bath to point at which VOM indicates contact trip action and note temperature value.
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Adjust temperature bath to point at which VOM c
indicates contact reset action and note k
temperature value.
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f Repeat steps 4.3.8b thru 4.3.8e until no further adjustments are necessary.
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Rscord final values obtained in "As i. eft" 5
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cl " Data Sheet".
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O 4.3.9 1f tem erstere switc8 has more than ene centact. regeet steps
.3.8a thru 4.3.8g if appropriate until all contacts have been calibrated.
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4.4 RESTORE TO SERVICE 4.4.1 Disconnect all test equipment used in performance of
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this procedure.
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4.4.2 Reinstall temperature sensing element in thermowell
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and/or holding apparatus as required.
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4.4.3 Reconnect switch leads as required.
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4.4.4 Open isolation valve (if applicable).
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4.4.5 Verify instrument reflects current plant conditions
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after it is returned to service.
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VEGP 22332-C 2
6 of 10 4.4.6 For Safety-Related systems, have an Independent
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Restoration Verification performed by designated
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personnel.
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4.4.7 Notify RO chat instrument has been returned to service.
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i 4.4.8 Notify Shif t Supervisor, or designee, of completion of
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work includin3 test results and obtain signature on
" Completion Sheet".
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5.0 ACCEPTANCE CRITERIA 5.1 The Acceptance criteria for this procedure is that the temperature switch is within limits specified on " Data Sheet" i
5.2 Satisfectory completion of this procedure has been met when I&C Foreman has evaluated data obtained per Acceptance Criteria of this procedure, reviewed, and signed " Data Sheet" provided.
6.0 REFERENCE,3 6.1 Ins ruction Manual for switch under test.
6.2 Procedure 00306-C, " Temporary Jumper And Lifted Wire O
Control" END OF PROCEDURE TEXT m
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2 7 of to Sheet I of 1 DATA SHEET nst. No.
Location Serial No.
Description Temperature Switch Manufacturer Model No.
NUTE57'7lff' i
Action UNITS EXPEUrt.D LO LIMIT HI LIMIT AS FOUND AS LEFT
-Switch TrippR Switch Reset i
Action UNITS EXPEUrt.D LO LIMIT HI LIMIT AS FOUND AS LEFT Switch Tripped j
l Switch Reset Action UNITS EXPECTED LO LIMIT HI LIMIT AS FOUND AS LEFT Switch Tripped Switch Reset 1 i
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TEST EQUIPMENT I.D. NO.
MODEL NO.
CALEBRATION DUE DATE
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PERFORMED BY:
DATE:
REVIEWED BY:
DATE:
APPROVED BY:
DATE:
VEGP 22332-C 2
6 of 10 Shoot 1 of i
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CALCULATION SHEET v
Show all calculations performed during course of this procedure in the space below.
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A Completed by:
Date:
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Reviewed by:
Date:
Approved by:
Date:
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9 of 10 Sheet 1 of 1 CHECKLIST 3.1 Shift Supervisor Authorization i
i0 Signature
>i,Date.
4 3.2 Reactor Operator (RO) Notified i
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Signature Date STEP VERIFICATION Step /Substep Initial Step /Substep Initial 3.4 Prerequisites met 4.4.4 Isolation valve 4.2.2 Leads disconnected 4.4.5 Reflects plant 4.2.2 Independent conditions Verification 4.4.1 Test ec uipment
- removec, 4.4.2 Element installed 4.4.3 Leads connected
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m RESTORATION VERIFICATION Initial Initial 1.
Element installed
- 3. Isolation valve open 2.
Leads connected Performed by:
Date
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l Reviewed by:
Date
P90CEDU E NO.
EEVl510N PAGE NO VEGP 22332-C 2
10 of 10 Sheet 1 of 1-COMPLETION SHEET PROCEDURE TITLE TEMPERATURE SWITCH CALIBRATION TIME TEST STARTED BY
_ DATE DEFICIENCIES OCCURRED AND ACTIONS TAKEN I
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l TEST RESULTS:
ACCEPTABLE ( )
UNACCEPTABLE ( )
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~.ITEMPERATURE SWITCH RESTORED TO SERVICE ( )
TEST COMPLETED BY TIME
_ DATE SHIFT SUPERVISOR NOTIFIED
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Signature
~ Time Date REVIEWED BY:
DATE:
O APPROVED BY:
DATE:
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