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SUBMERGENCE TEST FOR

LOT gl LEVEL A

ITT BARTON TRANSMITTERS

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Intr'oduction

The submergence test described herein is intended to demonstrate theability of the test units to function in a simulated post-accidentenvironment.'he test was performed as part of the design verificationtest for the first production lot of level A ITT Barton transmitters.

The three test units used had previously gone through a sequentialqualification test, which included irradiation to 50 MRad, seismictesting and a high-temperature st am test. Details of this'estingare contained in a report entitled gualification Testin of partonTransmitters which was transmitted to the I'IRC by letter NS-TI1A-1950.

Acce tance Criterion

The test'was performed to demonstrate that the transmitters will operateduring submerged conditions. It was expected that the transmitter wou',dperform within specifications for the test conditions ot else fail dueto leakage.

Test Units

The three test units were two (2) ITT Barton Model 763 pressuretransmitters and one (1) Model 764 differential pressure transmitter.Ranges and serial numbers are given in Table l.

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The test was performed at MPMRSD Forest Hills site. Procedures forequipment handling were the sensor qualification standard procedures.

The test units were installed in an autoclave equipped with a liquidlevel sight gage and pressure regulation hardware, Pressure andelectrical connections to the test units were taken out of the vesselthrough sealed connectors.

Static pressure was maintained on the test units throughout the testby means of a regulator connected to the plant nitrogen supply. A'ifferential pressure was maintained on the D/P unit only during theday shift.

Power was supplied to the test units at all times from MISO Model 7300loop power supply cards in series with a 500 ohm load. The output fromthe test units as well as reference transducer outputs and the chamberpressure and temperature were monitored by a Fluke Model 8400 datalogger. The data logger was set to automatically scan each input onceevery 1S minutes..

A schematic of the test set-up is given in Figure l.

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TEST UNITS

Desi nation

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Test Procedure

The test units were installed in the test chamber and all electrical and

pressure connectors were made according to standard >lestinghouse PNRSD sensor*'ualification practices. Connections were verified and a data base was

established by performing a 21-point calibration check per SEg procedures(per Appendix A).

The test chamber was flooded with a solution of 2000 ppm Boric Acid adjustedto a pH of 8.5 with Sodium Hydroxide. A sight glass level indicator wasused to insure that the transmitters were covered by the solution at alltimes. A static pressure was maintained on the solution from a nitrogen supply.The pressure was equal to 20 psig pius 3 feet of water or 21.3 psig +2 psi.

. The solution was at room ambient which was 70-75oF during this test.

A static pressure of 2100 psig was maintained on all the test units throughoutthe test. A differential pressure was provided to test unit AR-2 by establish-ing a small flow from the regulated supply across a restriction. The differen-tial pressure was maintained at approximately 50Ã of calibrated span. This isconsidered a representative output. The differential was set up during thenormal day shift in order to verify transmitter operability. The static pres-sure and differential were continuously monitored by reference transducers.

Test Results

All transmitters remained operational throughout the two week test. Table 2

lists the maximum error observed in the output of the test units during the twoweek period. This error calculation is based on a comparison of the change intest unit output corrected for changes in the reference test unit output. Asummary of the pre and post Submergence Test 21-point calibrations appears inTable 3. *

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Conclusions

As demonstrated by the small change in reference accuracy, the transmittersperformed properly during the Submergence Test.

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TABLE 3

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Pre-SubmergenceReference Accurac

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NOTE: Accuracies are expressed in percent ofca1ibrated span. Test units have notbeen adjusted since prior to irradiation.

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Procedure: Based on S.A.tl.A. 20.1, 1973

A. Connect unit to test setup per Figure 1 (see reverse side).

B. r.heck for adequate warmup tim on calibration equipment. Mal'mup test items fov at least15 minutes. Record warmup time.

Connect output of T.I. test set or Gilmore calibv tov to high pvessuve inlet.D. Do riot exevcise test items befi-ve.calibration {RE: t1emo E-PCB-1307, R. Bitting).

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; E. "Perform a dead band check for three points. {Refer S.A.H.A., Section 4, Test l'iocedu«s5. Paragraph 4.5, Dead Band).

— F. Perform a 21 point calibration, starting near mid-range on increasing pressure to full'scale, to low'scale, to full scale, .to low scale, then to starting point. Record data.Refer data card, Attachment l.

G. Entf r calibration data into Ni:S SEgT data reduction program. (HHSEOTI Time ShareTerminal). See Attachment 2. NOTE: "Ideal line" compares actual output with ratedoutput, . RE: E-PCB-1394, 4-28-78.

II

H. De-energize power supply, Rerrrove i tems from test setup.

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A. Connect unit to test setup per Figure 1 (see revevse side).<<

'B. Check for adequate warmup time on calibvatioii equipment. 1/armup test items fov at least15 minutes. Record warmup time.

.'C. Connect regulated pressure to pressure inlet per Figure 1 ~

Do not, exercise test items before calibration (RE: ttemo E-PCB-1307, R. Bitting).I

I

Perfovm a 'dead band check for thvee points (Refer S.A.M.A. Section 4, Test Proceduves,,'Paragraph 4,,5, Dead Band).

F. Perforni a 2) point calibration, starting near mid-range on incveasing Pressure to ful'1scale, to low sca'le, to full scale, to low scale, thorn to starting point, Record data;ftefev data card, Attachment l.

G. Enter calibration data into MES SEQT data reduction Program. (HllSEQT, Time ShareTerminal). See Attachment 2. NOTE: «Ideal line" compares actual output with routput, RE: llemo E-PCB-1394, 4-28-78.

,H. De-energize power supply. Remove'tems from test setup.

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