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Core Operating Limits Rept,Palo Verde Nuclear Generating Station,Unit 2,Cycle 4
	ML17306A602
Person / Time
Site:	Palo Verde
Issue date:	03/19/1992
From:	; ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	;
Shared Package
ML17306A600	List: ML17306A601; ML17306A602; ML17306A604; ML20091A497;
References
	NUDOCS 9203270203
	Download: ML17306A602 (46)
	v • d • e

CORE OPERATING LIMITS REPORT UNIT 2 CYCLE 4

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CORE OPERATING LIMITSREPORT PALO VERDE NUCLEARGENERATING STATION(PVNGS)

UNIT2 CYCLE 4 INDEX P~AE AFFECTED PVNGS TECHNICALSPECIFICATIONS..........................................

1 CORE OPERATING LIMrrs P 'PPTzP EN P~FsFa+Fea oCES e ~ ~ ~ ~ ~ ~ ~

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L LIST OF TABLES

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CORE OPERATING LIMITSREPORT PALO VERDE NUCLEARGENERATING STATION (PVNGS)

UNIT2 eveLE a This Core Operating Limits Report for PVNGS Unit 2 Cycle 4 has been prepared in accordance with the requirements of Technical Specification 6.9.1.

The core operating limits have been developed using the NRC approved methodologies specified in References 1 through 5.

FFE TED PVN TE H AL PE IFI ATI N 1) 3.1.1.2 Shutdown Margin K z Any CEA Withdrawn 2) 3.1.1.3 Moderator Temperature Coefficient 3) 3.1.2.7 Boron Dilution Alarms 4) 3.1.3.1 Movable Control Assemblies CEA Position 6) 3.1.3.7 Part Length CEA Insertion Limits 7) 3.2.1 Linear Heat Rate 8) 3.2.3 Azimuthal Power Tilt Tq 9) 3.2.4 DNBR Margin 10) 3.2.7 Axial Shape Index 5) 3.1.3. 6 Regulating CEA Insertion Limits RE PER TI LIMIT The cycle-specific operating limits for the specifications listed are presented below.

.1.1.2 hut wn M r in K~ An CEA Wi h rawn The Shutdown Margin shall be greater than or equal to that shown in Figure 1.

Page 1 of21

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UNIT2 CYCLE 4 CORE OPERATING LIMITSREPORT RF PER ATIN L NTIN ED The moderator temperature coefficient (MTC) shall be within the area of Acceptable Operation shown on Figure 2.

7 B

D'ith 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.

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.

One or more CEAC's OPERABLE: The regulation CEA groups shall be limited to the withdrawal sequence and to the

. insertion, limits shown on Figure 4 when the COLSS is IN SERVICE or shown on Figure 5 when the COLSS is ~

OF SERVICE.

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

1 Lin The linear heat rate limit of 13.5 kW/ft shall be maintained.

The AZIMUTHALPOWER TILT (T<) shall be less than or equal to the limit in Figure 7 with COLSS IN SERVICE.

Page 2 of21

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UNIT2 CYCLE 4 CORE OPERATING LIMITSREPORT RF.

PFRATIN LIMIT -

NTIN ED 2

4 DNB COLSS IN SERVICE and Both CEAC's INOPERABLE Maintaining COLSS calculated core power less than or equal to COLSS calculated core power operation limit based 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 of acceptable operation of Figure 9 using any operable CPC channel.

COLSS OUT OF SERVICE and CEAC's INOPERABLE Operating within the region of acceptable operation of Figure 10 using any operable CPC channel.

The core average AXIAL SHAPE INDEX (ASI) shall be maintained within the following limits:

COLSS OPERABLE

-0.27 5 ASI 5 0.27 COLSS OUT OF SERVICE (CPC)

-0.20 5 ASI 5 0.20 page 3 of21

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UNIT2 CYCLE 4 CORE OPERATING LIMITSREPORT 1.

"C-E Method for Control Element Assembly Ejection Analysis,"

CENPD-190-A, January, 1976.

2.

"The ROCS and DIT Computer Codes for Nuclear Design,"

CENPD-266-P Ag Aprilg 1983.

3.

"INCA/CECOR Power Peaking Uncextainty," CENPD-153-P, Revision 1-P-A, May, 1980.

4.

"Safety Evaluation Report Related to the Final Design of the Standard Nuclear Steam Supply Reference Systems CESSAR System 80, Docket No.STN 50-470,"

NUREG-0852 (November 1981),

Supplements No.

1 (March 1983),

No.

2 (September 1983),

No.

3 (December 1987).

5.

"Modified Statistical Combination of Uncertainties,"

CEN-356(V)-P-A Revision 01-P-A,

May, 1988.

Page 4 of 21

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UNIT2 CYCLE 4 CORE OPERATING LIMITSREPORT 1.

Shutdown Margin Versus Cold Leg Temperature.

2.

Allowable MTC Modes 1 and 2.

3.

Core Power LimitAfterCEA Deviation.

4.

CEA Insertion Limits vs Thermal Power (COLSS In Service).

5.

CEAInsertion Limits vs Thermal Power (COLSS Out ofService) 6.

Part Length CEA Insertion Limitvs Thermal Power.

7

. Azimuthal Power TiltLimitvs Thermal Power (COLSS In Service).

8.'- COLSS DNBRPower Operating LimitAllowance forBoth CEACs Inoperable.

9.

DNBRMargin Operating LimitBased on Core Protection Calculators (COLSS Out ofService, CEACs Operable) t

10. DNBRMargin Operating LimitBased on Core Protection Calculators (COLSS Out ofService, CEACs Inoperable)

Page 5 of21

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UNIT2 CYCLE4 CORE OPERATING LIMITSREPORT (500, 6.5)

REGIO OF ACCEPTABLE OPERATION (350 4.0)

=

REGIO OF UNACCEPTABLE OPERATION 100 200 300 400 500 COLD,LEG TE1VPERATURE PF)

FIGURE 1 SHVH)OWNMARGINVERSUS COLD LEG TEMPERATURE Page 6 of21

0

0.5 (0%, 0.5)

(100%, 0.0)

-0.5

-1.5 ALLOWABLEMTC

-2

-2.5 (0%, -2.8)

-3

-3.5 0

10 20 30 40 50 60 70 CORE POWER LEVEL,% OF RATED THERMALPOWER 80 (100%, -3.5) 90

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UNIT2 CYCLE 4 CORE OPERATING LIMITSREPORT FIGURE 3 CORE POWER LIMITAFIER CEA DEVIATION~

R0 30 (60 MIN,20%)

A$

10 Ag fN 0g 0

10 20 30 50 TIMEAFI'ERDEVIATION,MINUTES

WHEN CORE POWER IS REDUCED TO 55% OF RATEDTHERMAL POWER PER THIS LIMITCURVE, FURTHER REDUCTIONIS NOT.REQUIRED Page 8 of21

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1.0 FIGURE 4 CEA INSERTIONLIMITSVERSUS THERMALPOWER (COLSS IN SERVICE) 0.9 0.8 0R O

0.7 ae g

0.6 0.5 0.4 O

0.3 0.2 p,'

R:,

0 cn 0

ON 0.1 0.0 150 120 GROUP 5 90 60 30 0

GROUP3 150 120 90 60 30 GROUP 1 0

150 120 90 60 30 0

GROUP 4 150 120 90 60 30 GROUP 2 0

150 120 90 60 30 0

CEA POSITION INCHES WITHDRAWN)

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1.0 FIGURE 5 CEA INSERTION LIMITSVERSUS THERMALPOWER (COLSS OUT OF SERVICE) 0.9 0.8 g

0.7 0

o 0.6 0.5 0.4 0.3 o

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cn i i

0.2 0.1 Ch CO 0.0 GROUP 5 GROUP, 3 GROUP 1 150 120 90 60 30 0

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)

0

1.00 0.90 0.80 g

0.70 0.60 0.50 a

0.40 g

XA

$ 9 Og (50% RATEDTfKRMALPOWER) 0.30 0

g 0.20 QC 0.10 0.00 No o

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PART LENGTHCEA POSITION, INCHES WITHDRAWN

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UNIT2 CYCLE 4 CORE OPERATING LIMITSREPORT FIGURE 7 AZIMUTHALPOWER TILTLIMITvs. THERMALPOWER (COLSS INSERVICE) 90 80 70 R

60 50 40 REGION OF UNACCEFI'ABLE OPERATION 30 20 10 REiGION OF ACCEPTABLEOPERATION 20 30 40 50 60 70 80 90 100 PERCENT OF RATED THERMiALPOWER Page 12 of 21

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UNIT2 CYCLE 4 CORE OPERATING LINIITSREPORT FIGURE 8 COLSS DNBRPOWER OPERA'IONG LIMIT ALLOWANCEFOR BOTH CEACs INOPERABLE 20%%uo 95%

POWER 20 15 10 COLSS DNBRPOWER OPERATING LIMITREDUCTION

(% OF RATED THERMALPOWER)

Page 13 of 21

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UNIT2 CYCLE 4 CORE OPERATING LIMITSREPORT 2.5 COLSS OUT OF SERVICE DNBRLIMITLINE 2.4 ACCEPTABLE OPERATION MINIMUM1 CEAC OPERABLE A

(0.2, 2.20)

O~ 21 O

(-0.2, 2.10) 2.0 UNACCEPTABLE OPERATION 1.9 1.8

-0.3

-0.2

-0,1 0.0 0.1 02 0.3 CORE AVERAGEASI FIGURE 9 DNBRMARGINOPERATING LIMITBASED ON CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, CEACs OPERABLE)

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UNIT2 CYCLE 4 CORE OPERATING LIMITSREPORT

'.6 COLSS OUT OF SERVICE DNBRLIMlTLINE 2.5 ACCEPTABLE OPERATION CEACs INOPERABLE 2.4 (0.05, 2.45)

(0.2, 2.45) 2.3 2.2

(-0.2, 2.25) 2.1 UNACCEPTABLE OPERATION 2.0

-0.3

-0.2

-0.1 0.0 0.1 0.2 0.3 CORE AVERAGEASI FIGURE 10 DNBRMARGINOPERATING LENTBASED ON CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, CEACs INOPERABLE)

Page15 of21

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UNIT2 CYCLE 4 CORE OPERATING LIMITSREPORT F

A 1.

Required Monitoring Frequencies forBackup Boron DilutionDetection as a Function of Operating Charging Pumps and Plant Operational Modes forK g > 0.98.

2.

Required MonitoringFrequencies forBackup Boron DilutionDetection as a Function of Operating Charging Pumps and Plant. Operational Modes for 0.98 2 K g> 0.97.

3.

Required Monitoring Frequencies. forBackup Boron DilutionDetection as a Function of

~ -Operating Charging Pumps and Plant Operational Modes for 0.97 2 K g > 0.96.

4.

Required Monitoring Frequencies forBackup Boron DilutionDetection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.96 2 K g> 0.95.

.',,5.'equired MonitoringSrequencies forBackup Boron. Dilution.Detection as a Function of Operating Charging Pumps and Plant Operational Modes forK g < 0.95.

Page 16 of 21

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UNIT2 CYCLE 4 CORE OPERATING LIMITSREPORT TABLE 1 REQUIRED MONITORINGFREQUENCIES FOR BACKUPBORON DlLUTIONDETECTION AS AFUNCTIONOF OPERATING

. CHARGINGPUMPS ANDPLANTOPERATIONALMODES FOR K ~) 0.98 OPERATIONAL MODE 0

1 2

3 Number ofOperating Charging Pumps 4 not on SCS 5notonSCS 4A 5onSCS 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 12 hours 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 1 hour 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 1 hour ONA ONA ONA ONA ONA ONA ONA ONA ONA ONA Notes:

SCS = Shutdown Cooling System ONA= Operation Not Allowed Page 17 of 21

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UNIT2 CYCLE 4 CORE OPERATING LIMITSREPORT TABLE2 REQUIIt'XDMONITORINGFREQUENCIES FOR BACKUPBORON DILUTIONDETECTION AS AFUNCTION OF OPERATING CHARGINGPUMPS ANDPLANTOPERATIONAL.MODES FOR 0.98 2 K g) 0.97 OPERATIONAL MODE Number ofOperating Charging Pumps 0

1 2

4 not on SCS SnotonSCS 4 gc 5 on SCS 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 8 hours 25 hours2.893519e-4 days 0.00694 hours 4.133598e-5 weeks 9.5125e-6 months 1 hour 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 0.5hours ONA ONA 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 2 hours 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 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 Notes:

SCS = Shutdown Cooling System ONA= Operation Not Allowed Page 18 of 21

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UNIT2 CYCLE 4 CORE OPERATING LIMITSREPORT REQUII&DMONITORINGFREQUENCIES FOR BACKUPBORON DILUTIONDETECTION AS AFUNCTION OF OPERATING CHARGING.PUMPS ANDPLANTOPERATIONALMODES FOR 0972 K tf) 0.96 OPERATIONAL MODE 0

1 2

3 Number ofOperating Charging Pumps 4 not on SCS Snot on SCS 445onSCS 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 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 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 13 hours 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months Notes:

SCS = Shutdown Cooling System ONA= Operation Not Allowed Page 19 of 21

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UNIT2 CYCLE 4 CORE OPERATING LIMITSREPORT TABLE4 REQUIRED MONITORINGFREQUENCIES FOR BACKUPBORON DILUTIONDETECTION AS AFUNCTIONOF OPERATING CHARGINGPUMPS ANDPLANTOPERATIONALMODES FOR 0.96 2 K,g) 0.95 OPERATIONAL MODE Number ofOperating Charging Pumps 0

1 4 not on SCS 5notonSCS 4% 5 onSCS 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 hours 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 5 hours 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 2 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 20 of21

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UNIT2 CYCLE 4 CORE OPERATING LMITSREPORT TABLE5 REQUIRED MONITORINGFREQUENCIES FOR BACKUPBORON DILUTIONDETECTION AS AFUNCTION OF. OPERATING CHARGINGPUMPS ANDPLANTOPERATIONALMODES FOR K g 5 0.95 OPERATIONAL MODE Number ofOperating Charging Pumps 0

1 2

3 4notonSCS 5 not on SCS 4ASonSCS 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 6 hours 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 6 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 2 hours 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months 8 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

- Notes:

SCS = Shutdown Cooling System Page 21 of 21

ML17306A602

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