ML17304A629

Startup Rept,Suppl 1.

ML17304A629
Person / Time
Site:	Palo Verde
Issue date:	10/31/1988
From:	ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
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ML17304A628	List: ML17304A627 ML17304A629
References
NUDOCS 8810120284
Download: ML17304A629 (9)

Text

PALO VERDE NUCLEAR GENERATING STATION UNIT 3 STARTUP REPORT (DOCKET NO. 50-530)

SUPPLEMENT 2 OCTOBER 1988 1630K/0058K 88l0120284 88'1005 PDR ADOCK 05000530 P PDC

i+i il PVNGS UNIT 3

.STARTUP TEST REPORT

,SUPPLEMENT 2 PAGE 1 INTRODUCTION This is the second'upplement to the startup report for Unit 3 of the Palo Verde Nuclear Generating Station (PVNGS). The original report, submitted to the NRC on April 6, 1988 (reference 1), addressed the startup test phases of initial fuel loading through power ascension testing. The test results for two areas of testing remained open at the time that this report. was submitted. Those areas were the Main and Emergency Feedwater Systems Test (Startup Report Section 6.10) and the CPC and COLSS Verification (Startup Report Section 6.11). The original report was followed in July 1988 by Supplement 1 (reference 2), which updated the status of the CPC and COLSS Veri'fication and closed .out the Main and Emergency Feedwater Systems Test.

This supplement summarizes the CPC and COLSS Verification, thereby closing out PVNGS Unit 3 Startup Report.

PERENCES

1. Letter 161-00926-EEVB/PGN, "Palo Verde Nuclear Generating Station (PVNGS)

Unit 3 Startup Report", dated April 8, 1988, from E. E. Van Brunt, Jr.,

(ANPP) to NRC.

2. Letter 161-01148-EEVB/PGN, "Palo Verde Nuclear Generating Station (PVNGS)

Unit 3 Startup Report 'Supplement 1", dated July. 1, 1988, from E. E. Van Brunt, Jr. (ANPP) to NRC.

PVNGS UNIT 3 STARTUP TEST REPORT SUPPLEMENT 2 PAGE 2 Section 6.11 CPC Verification and COLSS Verification (Sections 14.2.12.5.18 and 14.2.12.5.20)

E 0 ECTIVE AND

SUMMARY

The objectives of these tests were to verify the calculation of Departure from Nucleate Boiling Ratio (DNBR) and Local Power Density (LPD) performed by the Core Protection Calculators (CPCs) and the Core Operating Limit Supervisory System (COLSS), in addition to evaluating the effect of process instrument noise on the CPC system..

Testing was performed in accordance with the "COLSS/CPC Verification" test which was directed by PVNGS procedures 72PA-3SB02, at 0% full power (FP), 50%

FP and 100$ FP. The results from each of these tests were satisfactory.

TEST DESCRIPTION The calculations performed by each CPC channel are verified by comparing the values of Local Power Density (LPD) and Departure from Nucleate Boiling Ratio (DNBR) recorded from each channel with the values calculated by the Combustion Engineering CPC FORTRAN simulator code CEDIPS. When provided with a known variation of input data recorded from each of the CPC channels, the CEDIPS code calculates a range of values for LPD and DNBR which could be expected to bound the actual values observed on each of the CPC operator display devices.

The CPC data used as input to CEDIPS is manually gathered from the CPC display devices as maximum and minimum values observed over a specified period of time and consists of: pressurizer pressure, RCP speeds, control rod positions, RCS cold and hot leg temperatures, and excore detector responses. The CEDIPS DNBR and LPD values are compared to those observed and recorded during the test.,

If the observed DNBR and LPD values are within the range of expected values, the functioning of each CPC channel is considered to be verified and process instrument noise has not affected the CPC operation.

As a further step in evaluating the effect of process instrument noise, input signals to the "nosiest" CPC channel and its analog outputs were recorded on FH tape over a period of approximately two hours. The determination of the "nosiest" CPC channel was accomplished by monitoring the maximum variation in the DNBR value calculated by each CPC channel at 1 minute intervals over a 10 minute period. This data was gathered for evaluation by the NSSS vendor and had no specific test acceptance criteria.

For COLSS calculations, a statistical analysis of different sensor inputs measuring the same parameters was performed to ensure that the instruments were consistent and functioning properly. The statistical analysis is performed automatically on demand by the COLSS Sensor Deviation Statistical Routine which is executed on the Plant Monitoring System (PMS). Additionally, COLSS input and output values were collected via PMS data snapshots.

ig>.

PVNGS UNIT 3 STARTUP TEST REPORT SUPPLEMENT 2 PAGE 3:

Following completion of testing at each test plateau, the COLSS statistical data, the COLSS input and output data snapshots, and the FM recorded CPC data were transmitted to the NSSS vendor for evaluation.

EST RESU TS The CPC calculated minimum/maximum DNBR and LPD values recorded during the test for .the 0%, 508 and 100% power plateaus are provided in Tables 1, 2 and 3 along with the CEDIPS calculated range of expected values. All of the CPC calculated DNBR and LPD values were bounded by the corresponding CEDIPS range.

of values.

The COLSS data recorded during the testing have been evaluated by the NSSS vendor and the COLSS calculations have been determined to be acceptable.

CONCLUSION The CPC and COLSS calculations of DNBR and LPD were satisfactorily confirmed at each of the major test plateaus.

. PVNGS UNIT 3 STPliTUP TEST RE>ART PAGE 4 TABLE X.

CPC/CEDIPS COMPARISON FINAL TEST RESULTS OX POWER PLATEAU Official Test Copy $ 01 (Ot Pouer Plateau)

. CHANHEL A CHANNEL B I PARA I CPC I I I I CHANNEL C I CHANNEL D

( HETER ( PID ( (

CEDIPS'PCi ( CEDIPS CPC ( CEDIPS CPC ( CEDXPS CPC

( HAX ( 5.278 ( 5,264 ( 5 373 ( 5 264 ( 5 275 ( 5 265 ( 6 '89 5.750 I XPDDC ( 179 I HIN I 5,252 I 5.264 5 250 I 5 263 5.253 I 5.264 I 5,253 I 5.730

( ACC.CRIT.'( PASS PASS PASS ( PASS .

(o o o e e e <<oo <<>> (oooo o>>

( MAX ( 6.434 ( 6.405 6 679 I 6 '01 6 '20 I 6 400 I 6 436 I 6 '14 I HINDNBI 406 I HIN I 6 276 I 6 403 6 '03 I 6.333 I 6 '6'7 I 6 '35 I 5.750 I 6 '43 l I ACCT CRXT I PASS PASS PASS' PASS Reanalysis (OTC 401)

I PARA I CPC ( ( CNH D ADJUSTED I

'( HETER (

'PID ( ( CEDIPS CPC (

e I

I I I MAX ( 5.830 ( 5.750 I LPDDC I 179 I MXH I 5.581 I 5 730

( ACC,CRIT. ( PASS I

. (

o

( ( HAX ( 6.4352 ( 6.414 I MINDHBI 406 I HIH I F 2802 I 6 '43

( ( ACC.CRIT. ( PASS Notes:

CEDIPS used to calculate the ranges of XPD and DNBR values for each channel using the CPC nax/nin data recorden fron the CPC operator's module as case input.

CPC naz/nin LPD 'and DNBR values recorded fron the operator's nodule.

Acceptance Cr.".er'a .'s that -.."=- ohser"ed vaiues of LPD an:

DNBP. caiculated by the CPC be wxthxn ".he range of vaiues calculated oy the CKDIPS computer cone.

PVNGS IJHIT 3 AR~JP TEST REPORT PAGE 5 TABLE 2 CPC/CEDIPS COHPARISON FINAL TEST RESULTS 50't POMER PLATEAU Official Vest Copy f02 (500, Power Plateau)

I PARA- I CPC I I CHANNEI A I CHANNEL B I CHANNEL C I CHANNEL D I HETER I PID I I CEDIPS CPC I CEDIPS CPC I CEDIPS CPC I CEDIPS CPC I-I HAX I 8.541 ( 8.359 I 8 465 I 8.440 8 332 ( 8 218 ( S 512 I 8 307 I LPDDC I 179 I HIN I 8 254 ~ I S ~ 340 I 8 '52 I 8 '20 ( 8 '95 ( 8. 183 I 8.235 ( 8.287 ACC.CRIT, I I

- ---I----

I I

PASS I I

PASS I

PASS

-I I PASS 0

I I HAX I 3959 I 3901 I 3889 I 3845 I 3980 I 3906 (3921 I 3 ~ 817 I HINDNBI 406 I HIN I 3.739 I 3.790 I 3.769 I 3.799 I 3.803 I 3.856 ( 3.717 I 3.795 I I ACC ~ CRIV I PASS I PASS I PASS I PASS TABLE 3 CPC/CEDIPS COHPARISON FINAL '?EST RESULTS 100% POMER PLAVEAU Official Vest Copy $ 03 (100't Power Plateau}

( PARA- I CPC ( ( CHANNEL A I CHANNEL B I CHANNEL C I .CHANNEL D I HETER I PID I I CEDIPS CPC I CEDIPS C?C I CEDIPS CPC I CEDIPS CPC 0 OO I

( I HAX I 14.320 I 13 923 I 14 051 I 13.155 I 14:057 I 13.833 I 14.113 I 14.059 I I LPDDC I 179 I HIN I 13.632 I 13 ~ 744 I 13 681 I 13 ~ 113 (13 ~ 680 I 13 ~ 753 I 13.626 I 13.728 I I

---

I------I----------I---------

I ACC ~ CRI'?. I PASS ( PASS I

PASS I

PASS

---

I I I HAX I 1 '56 I 1 '21 I 1,924 I 1.89S 1 914 I 1 8961 I I 931 I 1 871 I HINDNBI 406 I HIN ( 1.739 ( 1.895 I 1.778 I 1.873 I 1 778 I 1 '631 I 1 752 ( 1 800 I I ACC.CRIT. I PASS I PASS PASS ( PASS

<0 I

I P