Text

Docket No.Stn 50-528, Core Operating Limits Report: Unit 1 - Revision 9
	ML023230324
Person / Time
Site:	Palo Verde
Issue date:	11/01/2002
From:	Bauer S; Arizona Public Service Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	102-04661-SAB/TNW/GAM
	Download: ML023230324 (27)
	v • d • e

Qt IhAM Scott A. Bauer Technical Specification 5.6.5.d Department Leader Regulatory Affairs Tel 623/393-5978 Mail Station 7636 Palo Verde Nuclear Fax 623/393-5442 P 0 Box 52034 Generating Station e-mail sbauer@apsc com Phoenix, AZ 85072-2034 102-04861-SAB/TNW/GAM November 1, 2002 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-37 Washington, DC 20555-0001

Dear Sirs:

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 1 Docket No. STN 50-528 Core Operating Limits Report: Unit 1 - Revision 9 Pursuant to Technical Specification 5.6.5.d, enclosed is Revision 9 of the PVNGS Unit 1 Core Operating Limits Report (COLR), issued October 31, 2002.

No commitments are being made to the NRC by this letter. Should you have any questions, please contact Thomas N. Weber at (623) 393-5764.

Sincerely, SAB/TNW/GAM/kg Enclosure cc: E. W. Merschoff J. N. Donohew M. B. Fields N. L. Salgado A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway 0 Comanche Peak

Diablo Canyon

Palo Verde

South Texas Project 0 Wolf Creek

Enclosure Core Operating Limits Report for Palo Verde Nuclear Generating Station Unit I - Revision 9

Revision 9 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT CORE OPERATING LIMITS REPORT PALO VERDE NUCLEAR GENERATING STATION (PVNGS)

UNIT 1 Revision 9 Digkaly *wged by Foster. GisennAq-36831) mosso A' Reason Iwrithe authrewtceio ca r Location PVNGS Page 1 of 25

Revision 9 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Table of Contents Description Revision # Pae Cover Page 9 1 Table of Contents 9 2 List of Figures 9 3 List of Tables 9 4 Affected Technical Specifications 8 5 Analytical Methods 8 6 8 7 CORE Operating Limits 3.1.1 Shutdown Margin (SDM) - Reactor Trip Breakers Open 8 8 3.1.2 Shutdown Margin (SDM) - Reactor Trip Breakers Closed 8 8 3.1.4 Moderator Temperature Coefficient (MTC) 8 8 3.1.5 Control Element Assembly (CEA) Alignment 8 8 3.1.7 Regulating CEA Insertion Limits 8 8 3.1.8 Part Length CEA Insertion Limits 8 9 3.2.1 Linear Heat Rate (LHR) 8 9 3.2.3 Azimuthal Power Tilt (Tq) 8 9 3.2.4 Departure From Nucleate Boiling Ratio (DNBR) 8 9 3.2.5 Axial Shape Index (ASI) 8 10 3.3.12 Boron Dilution Alarm System (BDAS) 8 10 3.9.1 Boron Concentration 8 10 Page 2 of 25

Revision 9 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT List of Figures Description Revision # Page Figure 3.1.1-1 Shutdown Margin Versus Cold Leg Temperature 8 11 Reactor Trip Breakers Open Figure 3.1.2-1 Shutdown Margin Versus Cold Leg Temperature 8 12 Reactor Trip Breakers Closed Figure 3.1.4-1 MTC Acceptable Operation, Modes 1 and 2 8 13 Figure 3.1.5-1 Core Power Limit After CEA Deviation 8 14 Figure 3.1.7-1 CEA Insertion Limits Versus Thermal Power 9 15 (COLSS in Service)

Figure 3.1.7-2 CEA Insertion Limits Versus Thermal Power 9 16 (COLSS Out of Service)

Figure 3.1.8-1 Part Length CEA Insertion Limits Versus Thermal Power 8 17 Figure 3.2.4-1 COLSS DNBR Operating Limit Allowance for Both 8 18 CEACs Inoperable Figure 3.2.4-2 DNBR Margin Operating Limit Based on the Core 8 19 Protection Calculators (COLSS Out of Service, CEACs Operable)

Figure 3.2.4-3 DNBR Margin Operating Limit Based on the Core 8 20 Protection Calculators (COLSS Out of Service, CEACs Inoperable)

Page 3 of 25

Revision 9 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT List of Tables Description Revision Page Table 3.3.12-1 Required Monitoring Frequencies for Backup Boron 8 21 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for Keff> 0.98 Table 3.3.12-2 Required Monitoring Frequencies for Backup Boron 8 22 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.98 > Keff> 0.97 Table 3.3.12-3 Required Monitoring Frequencies for Backup Boron 8 23 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.97 >-Keff> 0.96 Table 3.3.12-4 Required Monitoring Frequencies for Backup Boron 8 24 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for 0.96 _>Keff> 0.95 Table 3.3.12-5 Required Monitoring Frequencies for Backup Boron 8 25 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for Keff_< 0.95 Page 4 of 25

Revision 8 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT This Report has been prepared in accordance with the requirements of Technical Specification 5.6.5. The Core Operating Limits have been developed using the NRC approved methodologies specified in Section 5.6.5 b of the Palo Verde Unit 1 Technical Specifications.

AFFECTED PVNGS TECHNICAL SPECIFICATIONS 3.1.1 Shutdown Margin (SDM) - Reactor Trip Breakers Open 3.1.2 Shutdown Margin (SDM) - Reactor Trip Breakers Closed 3.1.4 Moderator Temperature Coefficient (MTC) 3.1.5 Control Element Assembly (CEA) Alignment 3.1.7 Regulating CEA Insertion Limits 3.1.8 Part Length CEA Insertion Limits 3.2.1 Linear Heat Rate (LHR) 3.2.3 Azimuthal Power Tilt (Tq) 3.2.4 Departure From Nucleate Boiling Ratio (DNBR) 3.2.5 Axial Shape Index (ASI) 3.3.12 Boron Dilution Alarm System (BDAS) 3.9.1 Boron Concentration Page 5 of 25

Revision 8 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT ANALYTICAL METHODS The analytical methods used to determine the core operating limits shall be those previously reviewed and approved by the NRC, specifically those described in the following documents:

Title Report No. Rev Date Supplement

1) CE Method for Control Element CENPD N.A. January 1976 N.A.

Assembly Ejection Analysis 0190-A

2) The ROCS and DIT Computer CENPD N.A. April 1983 N.A.

Codes for Nuclear Design 266-P-A

3) Modified Statistical Combination CEN 01-P-A May 1988 N.A.

of Uncertainties 356(V)-P-A

4) System 80TM Inlet Flow Distribu Enclosure N.A. February 1993 1-P tion 1-P to LD 82-054

5) Calculative Methods for the CE CENPD N.A. March 2001 4-P-A Large Break LOCA Evaluation 132 Model for the Analysis of CE and W Designed NSSS

6) Calculative Methods for the CE CENPD N.A. April 1998 2-P-A Small Break LOCA Evaluation 137-P Model CEN-372

7) Fuel Rod Maximum Allowable N.A. May 1990 NA.

Pressure P-A

8) Arizona Public Service Com NFM002 0 September N.A.

pany PWR Reactor Physics Meth 1999 odology Using CASMO-4/

SIMULATE-3 Page 6 of 25

Revision 8 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Title Report No. Rev Date Supplement

9) Technical Manual for the CENTS CE-NPD N.A. June 1993 1-P Code 282-P-A Vols. 1-3

10) Implementation of ZIRLOTM CENPD 0 November N.A.

Cladding Material in CE 404-P-A 2001 Nuclear Power Fuel Assembly Designs Page 7 of 25

Revision 8 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT The cycle-specific operating limits for the specifications listed are presented below.

3.1.1 - Shutdown Margin (SDM) - Reactor Trip Breakers Open The Shutdown Margin shall be greater than or equal to that shown in Figure 3.1.1 1.

3.1.2 - Shutdown Margin (SDM) - Reactor Trip Breakers Closed The Shutdown Margin shall be greater than or equal to that shown in Figure 3.1.2 1.

3.1.4 - Moderator Temperature Coefficient (M4TC)

The moderator temperature coefficient (MTC) shall be within the area of Acceptable Operation shown in Figure 3.1.4-1.

3.1.5 - Control Element Assembly (CEA) Alignment 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 3.1.5-1.

3.1.7 - Regulating CEA Insertion Limits One or more CEACs OPERABLE: With COLSS IN SERVICE, regulating CEA 1

groups shall be limited to the withdrawal sequence and to the insertion limits shown in Figure 3.1.7-12; with COLSS OUT OF SERVICE, regulation CEA 1

groups shall be limited to the withdrawal sequence and to the insertion limits shown in Figure 3.1.7-2.2 1 A reactor power cutback will cause either (Case 1) Regulating Group 5 or Regulating Group 4 and 5 to be dropped with no sequential insertion of additional Regulating Groups (Groups 1, 2, 3, and 4) or (Case 2) Regulating Group 5 or Regulating Group 4 and 5 to be dropped with all or part of the remaining Regulating Groups (Groups 1, 2, 3, and 4) being sequentially inserted. In either case, the Transient Insertion Limit and withdrawal sequence specified in the CORE OPERATING LIMITS REPORT can be exceeded for up to 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

2 The Separation between Regulating Groups 4 and 5 may be reduced from the 90 inch value specified in Figures 3.1.7-1 and 3.1.7-2 provided that each of the following conditions are satisfied:

Page 8 of 25

Revision 8 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT a) Regulating Group 4 position is between 60 and 150 inches withdrawn.

b) Regulating Group 5 position is maintained at least 10 inches lower than Regulating Group 4 position.

c) Both Regulating Group 4 and Regulating Group 5 positions are maintained above the Transient Insertion Limit specified in Figure 3.1.7-1 (COLSS In Service) or Figure 3.1.7-2 (COLSS Out of Service).

3.1.8 - Part Length CEA Insertion Limits One or more CEACs OPERABLE: The part length CEA groups shall be limited to the insertion limits shown in Figure 3.1.8-1.

3.2.1 - Linear Heat Rate (LHR)

The linear heat rate limit of 13.1 kW/ft shall be maintained.

3.2.3 - Azimuthal Power Tilt (Tq)

The AZIMUTHAL POWER TILT (Tq) shall be less than or equal to 5% with COLSS IN SERVICE when power is greater than or equal to 20%.

3.2.4 - Departure From Nucleate Boiling Ratio (DNBR)

COLSS IN SERVICE and Both CEACs 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 3.2.4-1.

COLSS OUT OF SERVICE and Either One or Both CEACs are OPERABLE Operating within the region of acceptable operation of Figure 3.2.4-2 using any operable CPC channel.

COLSS OUT OF SERVICE and CEACs INOPERABLE - Operating within the region of acceptable operation of Figure 3.2.4-3 using any operable CPC channel.

Page 9 of 25

Revision 8 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT 3.2.5 - Axial Shape Index (ASI)

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

COLSS OPERABLE

-0.18 < ASI _<0.18 for power > 50%

-0.28 < ASI < 0.18 for power < 50%

COLSS OUT OF SERVICE (CPC)

-0.10:* ASI *0.10 3.3.12 - Boron Dilution Alarm System (BDAS)

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 3.3.12-1 through 3.3.12-5.

3.9.1 - Boron Concentration The boron concentration of all filled portions of the Reactor Coolant System and the refueling canal shall be maintained at a uniform concentration a 3000 ppm.

Page 10 of 25

PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Revision 8 FIGURE 3.1.1-1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS OPEN 7.................. ....................... ........ j....

2 I 6 - -

.--- ---------. .1................... .........................

.REGION OF i*. (500!,50)

ACCEPTABLE OPERATION

4 ~.................................... ."-

C-" 34 .................... ......... .............. ............... t cn REGION OF UNACCE*PTrABLE 2........................... ......... UNACC.PTABL OPERATION 1 (350.0) 0 ........ ......... ......... ......... ........

0 100 200 300 400 500 600 COLD LEG TEMPERATURE (F)

Page 11 of 25

PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Revision 8 FIGURE 3.1.2-1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS CLOSED (500,6.5):

6 -..------------- .-..------------------------- ....... . ............. . . ............ .. . ." . . . . . . .. . . . . .. . . . .

6---- ---- - - - ----------- -- ----------

REGION OF i ACCEPTABLE 5 -.. . --. OPE.RA.TIO N ........-................ .. .....................

S4 "- " - "" . . . . ."

(350,4.0)

S3... ."... ... ... .... ... ... ... ... .... ... ... ... ......................

on

REGION OF

. 2-- ---------------

UNACCEPTABLE 2 ..-- . . . . . . . .. .. . . . . .. . . . .--

OPERATION 0 . ......... ..... .... .... ..... .. .... ... ...... . .

0 100 200 '300 400 500 600 COLD LEG TEMPERATURE (TF)

Page 12 of 25

PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Revision 8 FIGURE 3.1.4-1 MTC ACCEPTABLE OPERATION, MODES 1 AND 2 0.5 (0%,0.5) ........

00.......waum. (50::00)i*..... an: :Liz.. k!..

,(100%,-0.

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-4.0 . ....... ...... ........... .... ----

... %,-4.

0 10 20 30 40 50 60 70 80 90 100 CORE POWER LEVEL

(% OF RATED THERMAL POWER)

End of Cycle Limit Beginning of Cycle Limit TECH SPEC 3.1.4 Maximum Upper Limit ........

Page 13 of 25

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PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Revision 8 FIGURE 3.1.8-1 PART LENGTH CEA INSERTION LIMITS VERSUS THERMAL POWER 0.0 --- - - - -- - - -- -....

10.0 S............................. iT .................... .

20.0 30.0 40.0 50.0 S....... ......-... . .. *............. . . ........

60.0 70.0 z0 qRANSIENT INSERTION LIMIT (75.0 INCHES) ti2 0n 80.0 R

90.0 ......

OPERA-T-ION ---- O PER-ATION1' S.:

U'.NACCEPTABLE i 100.0 ,, -----

......... ................P

--- ----- RESTRICTED

I.... I .....

............ ...p .... . .... .....------ . . .. ...........O------

P R i . I N............ .*.... . ...

110.0 .............................. .................. ......

LON4G TERM STEADY STATERAIN INSERTION INNCHES)

IMT(112.5 120.0 130.0 OPERAPTION ACCEPTABLESI 140.0 ------------ ---- ..................... * .

150.0 1..0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 FRACTION OF RATED THERMAL POWER Page 17 of 25 "

PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Revision 8 FIGURE 3.2.4-1 COLSS DNBR OPERATING LIMIT ALLOWANCE FOR BOTH CEAC's INOPERABLE 25 ......... . ......... .........

z; (20%95.0) 5 ........... ........................ ..............

C20 Z

0

,.0 -- ....................... .. . .... ..........

C)

(075 5 ......

U i (0.0,75.0 0 . . . . . . .. . . . . . . . . . . . . . . ...

0 25 50 75 100

-CORE POWER LEVEL

(% OF RATED THERMAL POWER)

Page 18 of 25

PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Revision 8 FIGURE 3.2.4-2 DNBR MARGIN OPERATING LIMIT BASED ON THE CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, CEAC's OPERABLE) 2.5 2.4 I 2.3

~ 2.2 ACCEE'TABLE OPERATION POWER AT OR ABOVE 90%

S2.1

$:,. MINIMUM OF I:CEAC OPERABLI u

(0.05;2.03) 2.0 1.9 1.8

-0.20 -0.15 -0.10 -0.05 0.00 0.05 0.10 0.15 0.20 CORE AVERAGE ASI Page 19 of 25

PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Revision 8 FIGURE 3.2.4-3 DNBR MARGIN OPERATING LIMIT BASED ON THE CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, CEAC's INOPERABLE) 3 .6 ......... ....... ... ....... .. ......... ....... .. ....... .........

3.5 ... ..........'............ ......... :............. .................. ..... .................. -................

ACC EPTABIE OPERATION ANY POWER LEVEL 3.4...................CEA's INOPERAB.E

(0.1,3.32) 3.3 ........ (0.0,3.32) u 3.2 ...... --- -----. .......... ........... ............ .............. ... ..........

(-0.1,3.19)

UNACCEPTABLE 3 .1 .. ..

OPERATION 3.0. ........ I . ..... .......... ......... I ......... ......... ......... ......

-0.20 -0.15 *-0.10 -0.05 0.00 0.05 0.10 0.15 0.20 CORE AVERAGE ASI Page 20 of 25

Revision 8 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Table 3.3.12-1 REQUIRED MONITORING FREQUENCIES FOR BACKUP BORON DILUTION DETECTION AS A FUNCTION OF OPERATING CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR Keff> 0.98 OPERATIONAL Number of Operating Charging Pumps MODE 0 1 2 3 3 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months ONA ONA 4 not on SCS 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months ONA ONA 5 not on SCS 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months ONA ONA 4 & 5 on SCS ONA ONA ONA ONA Notes: SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 21 of 25

Revision 8 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Table 3.3.12-2 REQUIRED MONITORING FREQUENCIES FOR BACKUP BORON DILUTION DETECTION AS A FUNCTION OF OPERATING CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR 0.98 > Kerr> 0.97 OPERATIONAL Number of Operating Charging Pumps MODE 0 1 2 3 3 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 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 4 not on SCS 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-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 ONA 5 not on SCS 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-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 ONA 4 & 5 on SCS 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-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 22 of 25

Revision 8 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Table 3.3.12-3 REQUIRED MONITORING FREQUENCIES FOR BACKUP BORON DILUTION DETECTION AS A FUNCTION OF OPERATING CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR 0.97;> Kerr> 0.96 OPERATIONAL Number of Operating Charging Pumps MODE 0 1 2 3 3 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 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months ONA 4 not on SCS 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 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 5 not on SCS 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 2.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 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 4 & 5 on SCS 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months ONA ONA Notes: SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 23 of 25

Revision 8 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Table 3.3.12-4 REQUIRED MONITORING FREQUENCIES FOR BACKUP BORON DILUTION DETECTION AS A FUNCTION OF OPERATING CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR 0.96 > Keff> 0.95 OPERATIONAL Number of Operating Charging Pumps MODE 0 1 2 3 3 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months 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 4 not on SCS 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 0.75 hours8.680556e-4 days 0.0208 hours 1.240079e-4 weeks 2.85375e-5 months 5 not on SCS 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-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 0.75 hours8.680556e-4 days 0.0208 hours 1.240079e-4 weeks 2.85375e-5 months 4 & 5 on SCS 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-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 ONA Notes: SCS = Shutdown Cooling System ONA = Operation Not Allowed Page 24 of 25

Revision 8 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Table 3.3.12-5 REQUIRED MONITORING FREQUENCIES FOR BACKUP BORON DILUTION DETECTION AS A FUNCTION OF OPERATING CHARGING PUMPS AND PLANT OPERATIONAL MODES FOR Keff_< 0.95 OPERATIONAL Number of Operating Charging Pumps MODE 0 1 2 3 3 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months 1.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 4 not on SCS 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 4.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 5 not on SCS 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 4.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 4 & 5 on SCS 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months 0.75 hours8.680556e-4 days 0.0208 hours 1.240079e-4 weeks 2.85375e-5 months ONA 6 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months 1.5 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 25 of 25

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