Text

Rev 0 to Core Operating Limits Rept for Pvngs,Unit 2,Cycle 6
	ML17311A796
Person / Time
Site:	Palo Verde
Issue date:	04/10/1995
From:	; ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	;
Shared Package
ML17311A795	List: ML17311A794; ML17311A796;
References
	NUDOCS 9504140162
	Download: ML17311A796 (40)
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PALO VERDE NUCLEARGENERATINGSTATION (PVNGS)

UNIT2 CYCLE 6 Revision 0 9504i40162 9504i0 PDR ADOt:K 05000529 P

PDR

Revision 0 CORE OPERATING LIMITSREPORT PALO VERDE NUCLEARGENERATING STATION (PVNGS)

UNIT2 CYCLE 6 INDEX REVISION HISTORY.

AFFECTED PVNGS TECHNICALSPECIFICATIONS CORE OPERATING LIMITS LIST OF FIGURES LIST OF TABLES

~AvF.

18 Page 2 of 23

Revision 0.

CORE OPERATING LIMITSREPORT PALO VERDE NUCLEARGENERATING STATION (PVNGS)

UNIT2 CYCLE 6 REVISIONHISTORY Revision Date

~Pa es Issue for Use (23 Total Pages)

Page 3 of 23

P

Revision 0 CORE OPERATING LIMITSREPORT PALO VERDE NUCLEARGENERATINGSTATION (PVNGS)

UNIT2 CYCLE 6 This Core Operating Limits Report for PVNGS Unit 2 Cycle 6 has been prepared in accordance with the requirements ofTechnical Specification 6.9.1. The core operating limits have been developed using the NRC approved methodologies specified in Section 6.9.1.10 ofthe Palo Verde Unit 2 Technical Specifications.

I'I'H THD PVN TH HNI AI. PH IFI ATI N 1) 3.1.1.2 2) 3.1.1.3 3) 3.1.2.7 4) 3.1.3.1')

3.1.3.6 6) 3.1.3.7 7) 3.2.1 8) 3.2.3 9) 3.2.4 10) 3.2.7 Shutdown Margin KN ~ - Any CEA Withdrawn Moderator Temperature Coefficient Boron DilutionAlarms Movable Control Assemblies - CEA Position Regulating CEA Insertion Limits Part Length CEA Insertion Limits Linear Heat Rate Azimuthal Power Tilt-Tq DNBR Margin Axial Shape Index RH PHRATIN I IMIT The cycle-specific operating limits for the specifications listed are presented below.

8.1.1.2 - Shutdown Mar 'n K~ - An CEA Withdrawn The Shutdown Margin shall be greater than or equal to that shown in Figure l.

3.1.1.3 - Moderator Tem erature Coefficient The moderator temperature coefficient (MTC) shall be within the area ofAcceptable Operation shown on Figure 2.

Page 4 of 23

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Revision 0 PVNGS UNIT2 CYCI E 6 CORE OPERATING L'IMITSREPORT RE PERATIN I IMIT -

NTIN ED 3.1.2.7 - Boron DilutionAlarms With one or both start-up channel high neutron flux alarms inoperable, the RCS boron concentration shall be determined at the applicable monitoring frequency specified in Tables 1 through 5.

3.1.3.1 - Movable Control Assemblies - CEA Position With one or more full-length or part-length CEAs misaligned from any other CEAs in its group by more than 6.6 inches, the minimum required MODES 1 and 2 core power reduction is specified in Figure 3.

3.1.3.6 - Re latin CEA Insertion Limits One or more CEAC's OPERABLE: The regulation CEA groups shall be limited to the withdrawal sequence and to the insertion limits shown ori Figure 4 when the COLSS is IN SERVICE or shown on Figure 5 when the COLSS is OUT OF SERVICE.

.1..7-Part Len h

EA Insertion Limits One or more CEAC's OPERABLE: The part length CEA groups shall be limited to the insertion limits shown on Figure 6.

3.2.1 - Linear Heat Rate The linear heat rate limitof 13.5 kw/ftshall be maintained.

.2.3 - Azimuthal Power Tilt-T The AZIMUTHALPOWER TILT(Tq) shall be less than or equal to the limitin Figure 7 with COLSS IN SERVICE.

Page 5 of 23

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Revision 0 PVNGS UNIT2 CYCLE 6 CORE OPERATING LIMITSREPORT RF<.

PF<.RATIN I.IMIT -

TI ED 3.2.4-DNBR Mar 'n COLSS IN SERVICE and Both CEAC's INOPERABLE - Maintaining COLSS calculated core power less than or equal to COLSS calculated core power operation limitbased on DNBR decreased by the allowance shown in Figure 8.

COLSS OUT OF SERVICE and Either One or Both CEAC's are OPERABLE - Operating within the region ofacceptable operation of Figure 9 using any operable CPC channel.

COLSS OUT OF SERVICE and CEAC's INOPERABLE - Operating withinthe region ofacceptable operation ofFigure 10 using any operable CPC channel.

3.2.7-Axial Sha e Index The core average AXIALSHAPE INDEX(ASI) shall be maintained within the followinglimits:

COLSS OPERABLE

-0.28 < ASI < 0.27 COLSS OUT OF SERVICE (CPC)

-0.20 < ASI < 0.20 Page 6 of 23

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Revision 0 PVNGS UNIT2 CYCLE 6 CORE OPERATING LIMITSREPORT

,I T F<FI v RES

1. Shutdown Margin Versus Cold Leg Temperature.

2. MTC Acceptable Operation, Modes 1 and 2.

3. Core Power LimitAfter CEA Deviation.

4. CEA Insertion Limits Versus Thermal Power (COLSS In Service).

5. CEA Insertion Limits Versus Thermal Power (COLSS Out ofService)

6. Part Length CEA Insertion LimitVersus Thermal Power.

7. Azimuthal Power TiltLimitVersus Thermal Power (COLSS In Service).

COLSS DNBR Power Operating LimitAllowance for Both CEACs Inoperable.

9. DNBR Margin Operating LimitBased on Core Protection Calculators (COLSS Out ofService, CEACs Operable) 10.DNBR Margin Operating LimitBased on Core Protection Calculators (COLSS Out ofService, CEACs Inoperable)

Page 7 of 23

t Revision 0 PVNGS UNIT2 CYCLE 6 CORE OPERATING LIMITSREPORT FIGURE 1

SHUTDOWN MARGINVERSUS COLD LEG TEMPERATURE (500, 6.5 RE ION OF ACCEPTABLE OPERATION A

@o 4

S4 (350 4.0)

REGION OF UNACCEPTABLE OPERATION 100 200 300 400 500 600 COLD LEG TEMPERATURE ( F)

Page 8 of 23

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0.5 0

-0.5

-2.5 (0%, 0.3$

(20%, 0.1)

(0%, -3.1) ech. Spec. 3.1.1.3 aximum Upper imit (100%, 0.0)

(50%, 0.0)

(100%, -0.2)

Beginning of Cycle limit MTC AREA OF ACCEPTABLE OPERATION End of Cycle limit Q

g 0

0 g0

-3.5 (100%, -3.8)

-4.0 0

10 I

I I

I 20 30 40 50 60 70 80 CORE POWER LEVEL,% OF RATED THERMALPOWER 90 100

Revision 0 PVNGS UNIT2 CYCLE 6 CORE OPERATING LIMITSREPORT FIGURE 3 CORE POWER LIMITAFTER CEA DEVIATION":

30 R0 U

A 20 Q c4 Oa C4 Q io gg Pc4 0

(60 MIN,20%)

10 20 30 40 50 60 TIMEAFTER DEVIATION,MINUTES

WHEN CORE POWER IS REDUCED TO 55% OF RATED THERMAL POWER PER THIS LIMITCURVE, FURTHER REDUCTION IS NOT REQUIRED Page 10 of 23

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1.0 0.9 0z0

/0 0

0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 e t-~Fr cn~(R g~@~)O y oo, o< p o

+ Qi

@5 Ch5 Cn

\\

RAN IENT NSE TIO LIM 0t M

92 H

0z 0

150 GROUPS GROUP 3 GROUP 1

120 90 60 30 0

150 120 90 60 30 0

GROUP4 GROUP 2 150 120 90 60 30 0

150 120 90 60 30 0

CEA POSITION INCHES WITHDRAWN)

~ >

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1.0 0.9 0z0 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0z p04 M +~ ~

+~>~O

~+ms@

~ ~~ 4 R~>>o.

M 0.1-0.0 GROUP5 GROUP3 GROUP 1

150 120 90 60 30 0

GROUP 4 GROUP 2 150 120 90 60 30 0

150 120 90 60 30 0

CEA POSITION (INCHES WITHDRAWN)

l

0z0 0

1.00 0.90 0.80 0.70 0.60 0.50

.0.40 0.30 0.20 0.10 M

C5 0

"0 0R z

0R q

zO 0+

0>

Q C5 (50% RATEDTHERMALPOWER) iB

+n 0

3 z

th z

5 0z C) zOzI" zQ O

2'.

0z 0

RQ R

0 0

RQ 0

0.00 fA O

0 0

OO 0

0 0

0 Ch

~

tA 0

o o

'o o

o C

0 0

PART LENGTH CEA POSITION, INCHES WITHDRAWN

H 1'

r PI t

4 t

t L

l

t Revision 0 PVNGS UNIT2 CYCLE 6 CORE OPERATING LIMITSREPORT FIGURE 7 AZIMUTHALPOWER TILTLIMITVERSUS THERMALPOWER (COLSS IN SERVICE) 100 90 80 R

0l4 70 C4 c

60 C4 g

50 0

40 30 UNACCEPTABLE OPERATION

~

20 15 10 A

OPERATION 20 30 40 50 60 70 80 90 100 PERCENT OF RATED THERMALPOWER Page 14 of 23

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PVNGS UNIT2 CYCLE 6 CORE OPERATING LIMITSREPORT Revision 0 FIGURE 8 COLSS DNBR POWER OPERATING LIMIT ALLOWANCEFOR BOTH CEACs INOPERABLE (20, 95) 100 C4 75 o

50 Q

C4 0

25 U

C4 fV 25 20 15 10 0

COLSS DNBR POWER OPERATING LIMITREDUCTION

(% OF RATED THERMALPOWER)

Page 15 of 23

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PVNGS UNIT2 CYCLE 6 CORE OPERATING LIMITSREPORT Revision 0 FIGURE 9 DNBR MARGIN'OPERATINGLIMITBASED ON CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, CEACs OPERABLE) 2.5 2.4 2.3 ACCEP ABLE OPERATION M NIMUM1 C

< AC OPERA LE zA 2

U 2.1 U

(-0.2, 2.07 (0.06,2.22)

(0.2, 2.22) 2.0 UNACCE TABLE OPERATION

'.9 1.8

-0.3

-0.2

-0.1 0.0 CORE AVERAGEASI 0.1 0.2 0.3 Pago 16 of 23

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PVNGS UNIT2 CYCLE 6 CORE OPERATING LIMITSREPORT Revision 0 FIGURE 10 DNBR MARGINOPERATING LIMITBASED ON CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, CEACs INOPERABLE) 2.6 2.5 ACCE ABLE OPERATION CEACs INO ERABLE 2.4 (0.05 2.45)

(0.2, 2.45) 2.3 i5 2.2

(-0.2, 2.25) 2.1 UNAC PTABLE OPERATION 2.0

-0.3

-0.2

-0.1 0.0 0.1 0.2 0.3 CORE AVERAGEASI Page 17 of 23

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Revision 0 PVNGS UNIT2 CYCLE 6 CORE OPERATING LIMITSREPORT I,I T I TABLFS

l. Required Monitoring Frequencies for Backup Boron DilutionDetection as a Function ofOperating Charging Pumps and Plant Operational Modes for E g > 0.98.

2. Required Monitoring Frequencies for Backup Boron DilutionDetection as a Function ofOperating Charging Pumps and Plant Operational Modes for 0.98 > E g > 0.97.

3. Required Monitoring Frequencies for Backup Boron DilutionDetection as a Function ofOperating Charging Pumps and Plant Operational Modes for 0.97 > E,g > 0.96.

4. Required Monitoring Frequencies for Backup Boron DilutionDetection as a, Function ofOperating Charging Pumps and Plant Operational Modes for 0.96>K g> 0.95.

5. Required Monitoring Frequencies for Backup Boron DilutionDetection as a Function ofOperating Charging Pumps and Plant Operational Modes for E F 50.95.

Page 18 of 23

4I Revision 0 PVNGS UNIT2 CYCLE 6 CORE OPERATING LIMITSREPORT TABLE 1 REQUIRED MONITORINGFREQUENCIES FOR BACKUPBORON DILUTIONDETECTION AS A FUNCTION OF OPERATING CHARGING PUMPS ANDPLANTOPERATIONALMODES FOR Kcff)0.98 OPERATIONAL MODE Number of Operating Charging Pumps '

not on SCS 5 not on SCS 48'on SCS 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 12 hours 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months ONA 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 1 hour 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months ONA ONA ONA ONA ONA ONA ONA ONA ONA Notes:

SCS = Shutdown Cooling System-ONA = Operation Not Allowed Page 19 of 23

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Revision 0 PVNGS UNIT2 CYCLE 6 CORE OPERATING LIMITSREPORT TABLE2 REQUIRED MONITORINGFREQUENCIES FOR BACKUPBORON DILUTIONDETECTION AS A FUNCTION OF OPERATING CHARGING PUMPS ANDPLANTOPERATIONALMODES FOR 0.98 > K ff)0.97 1

OPERATIONAL MODE Number of Operating Charging Pumps 4 not on SCS 5 not on SCS 4&5onSCS 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 12 hours 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 8 hours 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months ONA 2.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 1 hour 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 2.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 1 hour 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months ONA ONA Notes:

SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 20 of 23

t t

Revision 0 PVNGS UNIT2 CYCLE 6 CORE< OPERATING LIMITSRE<PORT TABLE3 REQUIRED MONITORINGFREQUENCIES FOR BACKUPBORON DILUTIONDETECTION AS AFUNCTION OF OPERATING CHARGING PUMPS ANDPLANTOPERATIONALMODES FOR 0.97 > K ff> 0.96 OPERATIONAL MODE Number of Operating Charging Pumps 4 not on SCS 5 not on SCS

'&5onSCS 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 8 hours 3.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 1.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 1 hour 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months ONA 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 3.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 1.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 12 hours 3.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 1.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 1 hour Notes:

SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 21 of 23

Revision 0 PVNGS UNIT2 CYCLE 6 CORE OPERATING LIMITSREPORT TABLE4 REQUIRED MONITORINGFREQUENCIES FOR BACKUPBORON DILUTIONDETECTION AS AFUNCTION OF OPERATING CHARGING PUMPS ANDPLANTOPERATIONALMODES FOR 0.96 > K ff> 0.95 OPERATIONAL MODE Number of Operating Charging Pumps 0

4 not on SCS 5 not on SCS 48' on SCS 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 8 hours 5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 2 hours 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 5 hours 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 5 hours 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months 1 hour 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months 1 hour 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months 1 hour 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months ONA Notes:

SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 22 of 23

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Revision 0 PVNGS UNIT2 CYCLE 6 CORE OPERATING LIMITSREPORT TABLE5 REQUIRED MONITORINGFREQUENCIES FOR BACKUPBORON DILUTIONDETECTION AS A FUNCTION OF OPERATING CHARGING PUMPS ANDPLANTOPERATIONALMODES FOR K~ff< 0.95 OPERATIONAL MODE Number of Operating Charging Pumps 1

2 4 not on SCS 5 not on SCS 4 k,5 on SCS 6 ( > 4000 ppm) 6 (( 4000 ppm) 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 12 hours 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 8 hours 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months 6 hours 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months 2 hours 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months 8 hours 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months 2 hours 2.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 1.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 3 hours 1.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 3 hours 1.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 1 hour 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 4 hours 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months ONA Notes:

SCS = Shutdown Cooling System ONA = Operation not allowed Page 23 of 23

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ML17311A796

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