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Surveillance Procedure 2602-M1:incore Backup Recorder Calibr
	ML19224B043
Person / Time
Site:	Crane
Issue date:	03/07/1979
From:	; Metropolitan Edison Co
To:	Mullinix W; NRC/IE
References
	2602-M1, TM-0058, TM-58, NUDOCS 7906130466
	Download: ML19224B043 (9)
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UNIT #2 SURVEILLANCE PROCECURE 2602-M1 INCCRE BACKUP RECORDER CALIBRATION Table of Effective Pages Pace Date Revision Pace Da e_

Revision Pace Date R evision T

26.0 51.0 1.0 09/26/77 0

2.0 03/07/79 1

27.0 52.0 3.0 03/07/79 1

28.0 53.0 4.0 09/25/77 0

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Date Approval A

Date Cce ;izant Da;:t. Head Car,nizart Dep:. Head Unit 1 PORC Recommends Approval Unit 2 PORC Rec mmer." Arvoval A/h W

Cate3 T 99 Date Chairrr.an of PORC W Chairrr.an of PORC

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Unit 1 Superintendent Approval Unit 2 Superirit'endent Approval 7

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Manager Generat on Cuality A:surance Approval 4/[/

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UIREE MILE ISLuiD NUCLEAR STATION 13 23 1973 UNIT #2 SURVEILLANCE PROCEDU'E 2602-M1 INCORE BACKUP RECORDER CALIBRATICN 1.0 PURPOSE 5

t.

1 To insure that the backup incore recorders used to ec= ply with TMI Unit 2 Technical Specifications 3.2.1, 3.2.2, 3.2.3 and 3.2.4 are in calibration.

2.0 APPLICABLE SURVEILLUTCE FRECUENCY AND MCDE

2.1 Frequency

At least once =cnthly.

2.2 Modes

1 & 2.

3.0 LIMYTS AND PRECALTIONS 3.1 Wait 15 =inutes (or fer obvicus equilibriu=) after a pcwet change pric: to using an incore reading.

3.2 Wait 30 minutes fcilowing a power level change before reading an incare detector for calibration purpcses.

3.3 Restrict pcwer icvel changes to + or - 2 percent during calibration adjustments.

3.4 If it beccees necessary to disconnect an incere detector from the plant cc=puter during power operation, the incore detector leads

=ust be shorted together prior to or i==ediately upon disconnection to prevent undesirable voltage buildup and cc=puter input circuits

=ust be protected during disconnection and reconnection.

3.5 Prior to and subsequent to perferring any maintenance en an incore

=cnitor assembly, obtain a ec=puter printout of all corrected, uncorrected and background currents being legged for that incore

=cnitor assembly. (Cc=puter Groups da and 47) Investigate if any significant errors in the computer data for an incere =cn. tor asse=bly have been introduced by the =aintenance operations.

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2602-M1 7A' Revisicn 1 03/07/79 dk 4.0 LCCATION OF SYSTEM /ASSEMSLY

/U 47R 2 3 $3 Ccmputer Programmers Typer - Control Room PND Recorders Control Rocm Panel 14 5.0 ECUIPMENT RECUIRED 5.1 Fluke differential voltmeter, Mcdel 887AB or equivalent.

6.0 PROCECURE 6.1 Turn en Programmer's Typer, hit r and the carriage returns.

The type-shculd return!

6.2 Type " cont back,s" and press the carriage return key.

6.3 Comcuter will crint cut the On-line data and the calculated results as shcwn in Appendix A.

6.0

,;hile ccccuter is perfcrming prcgram, recccc backup recceder reading;, MRi, and transfer to computer printout when program is ccmpleted.

NOTE:

The backup recorders have a scale of 0 to 3.C0 and shculd be read to two decicTl places.

6.5 Calculate the correction facter as follows:

Correction Factor = j<Rc M

ri NOTE:

Perform the remaining steps only if reactor power is greater than seventy percent.

6.5 Have an instrument technician go to the sickup reccrders with a DVM to make the corrections.

Use the DVM to take a reading for each detector from the detector output.

Enter on computer data sheet printcuts for Reccrder A and B.

Multiply the CVM reading for each detector by the appropriate correction factor to cbtain the correct reading.

Then adjust the depletico setting (potenticmeter) so that 2o 184 142

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2602-Mi Revision 1 03/07/79 the DVM reads the same values as the correct reading just calculated.

Ce this for the 36 detectors listed.

NOTE:

Record Digital Voltmeter model, serial number, calibration frequency and date last calibrated en the data sheets.

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6.7 Record the correct reading and potenticmeter setting when calibrations have been made.

7.0 ACCEPTANCE CRITERIA 7.1 The appropriate correction factor and depletion setting for each detector have been set as indicated by ccmpleticn of the Cata Sheets for Recorder A and 3.

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ML19224B043

Contents

Text

2.1 Frequency

2.2 Modes

C

Navigation menu

ML19224B043

Text

2.1 Frequency

2.2 Modes

C

Navigation menu

Search