Text

Unit 2 Core Operating Limits Report (Colr), Revision 17
	ML11129A031
Person / Time
Site:	Palo Verde
Issue date:	04/27/2011
From:	Weber T; Arizona Public Service Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	102-06354-TNW/GAM
	Download: ML11129A031 (29)
	v • d • e

Technical Specification 5.6.5.d Thomas N Weber Mail Station 7636 Palo Verde Nuclear Department Leader, Tel. 623-393-5764 PO Box 52034 Generating Station Regulatory Affairs Fax 623-393-5442 Phoenix, Arizona 85072-2034 102-06354-TNW/GAM April 27, 2011 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Dear Sirs:

Subject:

Palo Verde Nuclear Generating Station (PVNGS) Unit 2 Docket No. STN 50-529 Unit 2 Core Operating Limits Report (COLR), Revision 17 Pursuant to PVNGS Technical Specifications, Section 5.6.5.d, enclosed is the Unit 2 Core Operating Limits Report (COLR), Revision 17, which was made effective April 15, 2011. The following changes have been implemented in this COLR revision:

Changed the format of the analytical methods table (pages 6 and 7 of 26)

Enhanced the internal document numbers shown in the titles of several methods (pages 6 and 7 of 26)

" Added a revision number to Report No. CENPD-1 32 (page 6 of 26)

" Updated the date and revision number for Report No. NFM-005 (page 6 of 26)

" Added a Revision Number for Report No. CEN-1 60(S)-P (page 7 of 26)

Revised Figure 3.1.4-1 to change the negative moderator temperature coefficient (MTC) lower limit (page 13 of 26)

No commitments are being made to the NRC by this letter. Should you need further information regarding this submittal, please contact Russell A. Stroud, Licensing Section Leader, at (623) 393-5111.

Sincerely, TNW/RAS/GAM/gat

Enclosure:

PVNGS Unit 2 Core Operating Limits Report (COLR), Revision 17 member of Callaway

AComanche Peakthe* STARS Diablo (Strategic Teaming Canyon

Palo Verdeand* Resource San OnofreSharing)

SouthAlliance Texas

Wolf Creek %!

ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Unit 2 Core Operating Limits Report (COLR), Revision 17 Page 2 cc: E. E. Collins Jr. NRC Region IV Regional Administrator L. K. Gibson NRC NRR Project Manager for PVNGS J. R. Hall NRC NRR Senior Project Manager M. A. Brown NRC Senior Resident Inspector for PVNGS

Enclosure PVNGS Unit 2 Core Operating Limits Report (COLR)

Revision 17

PALO VERDE NUCLEAR GENERATING STATION (PVNGS)

UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 Effective Date: April 15, 2011 Rigitallysigned byWenzelR(Z99534 Responsible Engineer W enzel.~, "" icar R(99" 4 Date DateRichard %tR(Z99534)

ON: cn=Wenzel, Richard Reason:l am the author of this

',-,doc*umenit, R(Z99534} S -07'00'2011 Date: '.03.01 09:09:34 Independent Reviewer Date BOd n a r, Digitally signed by Bodnar, Walter S(Z06432)

DN: cn=Bodnar, Walter S(Z06432)

WalIter Reason: I have reviewed this ddcdiiientl S (Z70 6 432 Date: 201 1°03.01 09:14:32

-07'00' signed by lowland, Date Resp nsile Sctin LederDigitally J~~~owam es , mapoigti JaesW(Z8O533)Resn Date DN: cn=Rowland, James Jam es Reaseon:3I ampproving this docment as the Reload Analysis (Z80~5 33) section leader Date: 2011.03.01 09:43:51 -07'00' Page 1 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 Table of Contents Description Page Cover Page 1 Table, of Contents 2 List of Figures 3 List of Tables 4 Affected Technical Specifications 5 Analytical Methods 6 CORE Operating Limits 3.1.1 Shutdown Margin (SDM) - Reactor Trip Breakers Open 8 3.1.2 Shutdown Margin (SDM) - Reactor Trip Breakers Closed 8 3.1.4 Moderator Temperature Coefficient (MTC) 8 3.1.5 Control Element Assembly (CEA) Alignment 8 3.1.7 Regulating CEA Insertion Limits 8 3.1.8 Part Strength CEA Insertion Limits 9 3.2.1 Linear Heat Rate (LHR) 9 3.2.3 Azimuthal Power Tilt (Tq) 9 3.2.4 Departure From Nucleate Boiling Ratio (DNBR) 9 3.2.5 Axial Shape Index (ASI) 10 3.3.12 Boron Dilution Alarm System (BDAS) 10 3.9.1 Boron Concentration 10 Page 2 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 List of Figures Description Page Figure 3. 1.1-1 Shutdown Margin Versus Cold Leg Temperature II Reactor Trip Breakers Open Figure 3.1.2-1 Shutdown Margin Versus Cold Leg Temperature 12 Reactor Trip Breakers Closed Figure 3.1.4-1 MTC Acceptable Operation, Modes l and 2 13 Figure 3.1.5-1 Core Power Limit After CEA Deviation 14 Figure 3.1.7-1 CEA Insertion Limits Versus Thermal Power 15 (COLSS in Service)

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

Figure 3.1.8-1 Part Strength CEA Insertion Limits Versus Thermal Power 17 Figure 3.2.3-1 Azimuthal Power Tilt Versus Thermal Power 18 (COLSS in Service)

Figure 3.2.4-1 COLSS DNBR Operating Limit Allowance for Both 19 CEACs Inoperable In Any Operable CPC Channel Figure 3.2.4-2 DNBR Margin Operating Limit Based on the Core 20 Protection Calculators (COLSS Out of Service, CEAC(s)

Operable)

Figure 3.2.4-3 DNBR Margin Operating Limit Based on the Core 21 Protection Calculators (COLSS Out of Service, Both CEACs Inoperable In Any Operable CPC Channel)

Page 3 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 List of Tables Description Table 3.3.12-1 Required Monitoring Frequencies for Backup Boron 22 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for Kefr> 0.98 Table 3.3.12-2 Required Monitoring Frequencies for Backup Boron 23 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 24 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 25 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 26 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for Keff< 0.95 Page 4 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 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 2 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 Strength 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 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 ANALYTICAL METHODS The COLR contains the complete identification for each of the Technical Specification referenced topical reports (i.e., report number, title, revision, date, and any supplements) that provide the NRC-approved analytical methods used to determine the core operating limits, described in the following documents:

Title Report No. Rev Date Supp CE Method for Control Element Assembly CENPD- N.A. January N.A.

Ejection Analysis 0190-A 1976 (13 -NOO 1-1301-01204-1)

The ROCS and DIT Computer Codes for CENPD- N.A. April N.A.

Nuclear Design 266-P-A 1983 (13-NOO1-1900-01412-0)

Modified Statistical Combination of CEN- 01-P-A May N.A.

Uncertainties 356(V)-P-A 1988 (13-NOO - 1303-01747-2)

System 8 0 TM Inlet Flow Distribution Enclosure N.A. February 1-P (13-NO01-1301-01228-0) 1-P to LD- 1993 82-054 Calculative Methods for the CE Large Break CENPD- N.A. March 4-P-A LOCA Evaluation Model for the Analysis of CE 132 2001 Rev. 1 and W Designed NSSS (13-NOO1-1900-01192-3)

Calculative Methods for the CE Small Break CENPD- N.A. April 2-P-A LOCA Evaluation Model 137-P 1998 (13-NOO1-1900-01185-3)

Fuel Rod Maximum Allowable Pressure CEN-372- N.A. May N.A.

(13-NOO1-0201-00026-1) P-A 1990 Arizona Public Service Company PWR Reactor NFM-005 1 August N.A.

I Physics Methodology Using 2007 CASMO-4/SIMULATE-3 (NFM-005)

Technical Description Manual for the CENTS CE-NPD 2 March N.A.

CodeVolume 1 282-P-A 2005 (CENTS-TD MANUAL-VOL 1) Vols. 1 Technical Description Manual for the CENTS CE-NPD 2 March N.A.

Code Volume 2 282-P-A 2005 (CENTS-TD MANUAL-VOL 2) Vols. 2 Page 6 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 Title Report No. Rev Date Supp Technical Description Manual for the CENTS CE-NPD 2 March N.A.

CodeVolume 3 282-P-A 2005 (CENTS-TD MANUAL-VOL 3) Vols. 3 Implementation of ZIRLOTM Cladding Material CENPD- 0 Novem- N.A.

in CE Nuclear Power Fuel Assembly Designs 404-P-A ber (1 3-NOOl- 1900-01329-0) 2001 HERMITE, A Multi-Dimensional Space-Time CENPD- July Kinetics Code for PWR Transients 188-A 1976 (HERMITE-TOPICAL)

TORC Code, A Computer Code for Determin- CENPD- April ing the Thermal Margin of a Reactor Core 161-P-A 1986 (N001-1301-01202)

CETOP-D Code Structures and Modeling Meth- CEN- 1-P Septem- I ods for San Onofre Nuclear Generating Station 160(S)-P ber Units 2 and 3, (NOOl-1301-01185) 1981 CPC Methodology Changes for the CPC CEN-3 10- 0 April Improvement Program, (NOO 1-1303-02283) P-A 1986 Loss of Flow, C-E Methods for Loss of Flow CENPD- 0 June Analysis, (NO01-1301-01203) 183-A 1984 Methodology for Core Designs Containing CENPD- 0 August Erbium Burnable Absorbers 382-P-A 1993 (NOO-0201-00035)

Verification of the Acceptability of a 1-Pin Bur- CEN-386- 0 August nup Limit of 60 MWD/kgU for Combustion P-A 1992 Engineering 16 x 16 PWR Fuel (NOO-0201-00042)

Page 7 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 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 (MTC)

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-strength or part-strength 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. The required power reduction is based on the initial power before reducing power.

3.1.7 - Regulating CEA Insertion Limits With COLSS IN SERVICE, regulating CEA groups shall be limited to the withdrawal sequence and to the insertion limits1 shown in Figure 3.1.7-12; with COLSS OUT OF SERVICE, regulating CEA groups shall be limited to the withdrawal sequence and to the insertion limits1 shown in Figure 3.1.7-2.2 Regulating Groups 1 and 2 CEAs shall be maintained fully withdrawn 3 while in Modes 1 and 2 (except while performing SR 3.1.5.3).

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:

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.

Page 8 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 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 Fully withdrawn - >147.75" (Pulse Counter indication) and >145.25" (RSPT indication) 3.1.8 - Part Strength CEA Insertion Limits The part strength 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 10% with COLSS IN SERVICE when power is greater than 20% and less than or equal to 50%. Additionally, the AZIMUTHAL POWER TILT (Tq) shall be less than or equal to 5% with COLSS IN SERVICE when power is greater than 50%. See Figure 3.2.3-1.

3.2.4 - Departure From Nucleate Boiling Ratio (DNBR)

COLSS IN SERVICE and Both CEACs INOPERABLE in Any OPERABLE CPC Channel - Maintain 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 CEAC(s) OPERABLE - Operate within the region of acceptable operation of Figure 3.2.4-2 using any operable CPC channel.

COLSS OUT OF SERVICE and Both CEACs INOPERABLE in Any OPERABLE CPC Channel - Operate within the region of acceptable operation of Figure 3.2.4-3 using any operable CPC channel with both CEACs INOPERABLE.

Page 9 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 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*< 0.17 for power > 50%

-0.28 < ASI < 0.17 for power >20% and < 50%

COLSS OUT OF SERVICE (CPC)

-0.10 < ASI < 0.10 for power >20%

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 > 3000 ppm.

Page 10 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 FIGURE 3.1.1-1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS OPEN I

6 ............. .....................

..... ....).. . . ..

RE ION OF ACCEPTABLE OPERATION

....................... ............... ......... I.............. ........ .....................

"4 03 0-REGION OF UNACCEPTABLE ... ..................

2 OPERATION I

(350,1 .0) 0 I 0

. . . .. .ll.

100

.l . ., Jl.l 200 300

. l.. . . . . ....

400 500 600 COLD LEG TEMPERATURE ('F)

Page 11 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 FIGURE 3.1.2-1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS CLOSED 7

(500,

.......................................... ........................ i ..................... ""/

6 REGION OF ACCEPTABLE 5 ............. OPERATION . ........................ ........................ ............

g4 ........... ;......

z (350,4.0) z 0 3 .................. ...........

LEGION OF INACCEPTA] BLE 2 ............ ............. u IPERATION I ............ .............

0 .............

Mll . I .. .jIJ... l.-..llLl...L..

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

Page 12 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 FIGURE 3.1.4-1 MTC ACCEPTABLE OPERATION, MODES 1 AND 2 0.5

.(0%,0.5.., ....... ... . .(o*o

. . . .. u ...

0.0 (1.00% 02.,

-0.5 ol- . .. .............. ............. ....... ............. ............. ............. ............. ............. I.............. .O ...

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

-1.0 U

-1.5 ................... .... ....... .............. M T C -AR EA O0 F ....................... ............... ...........

ACCEPTABLE U

OPERATION

-2.0 2,

-2.5 0

-3.0 0

-3.5

-4.0 (100%,-4.4)

.(0%,-4.4)

-4.5 0 10 20 30 40 50 60 70 80 90 100 CORE POWER LEVEL

(%OF RATED THERMAL POWER)

Maintain Operation within Boundary TECH SPEC 3.1.4 Maximum Upper l_,imit .......

Page 13 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 FIGURE 3.1.5-1 CORE POWER REDUCTION AFTER CEA DEVIATION*

20 20 16 !M0% to

>80% RTP 15 15 z

0 12 12 *80%to -

LL0

>70% RTP 10 IF 10 8 0%to -

>45% RTP 5 5

3. I545% RTP 0/

0

.. . . .I . . . . . . . . . ... . . . . ... .. ....I. ....

. .. ... ... . I. -. -. -

0 10 20 30 40 50 60 TIME AFTER DEVIATION, MINUTES

WHEN CORE POWER IS REDUCED TO 35% OF RATED THERMAL POWER PER THIS LIMIT CURVE, FURTHER REDUCTION IS NOT REQUIRED.

Page 14 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 FIGURE 3.1.7-1 CEA INSERTION LIMITS VERSUS THERMAL POWER (COLSS IN SERVICE) 1.0 0.9 ............ -- - -- ---- EE FOOTNOTE- IN SEC{TIO N 3 1.;7-..--........-......

............ J(S..

F OR APPLICABILITY FOLLOWING:

...............* .......... .. .. ........ ....... C.T * ...

... .. T... B', .C...........

0.8 A REACTO.R CUTBACK)~.

0.7 -. ... ....... IRP 4.PO.*

--- -- s-(-2.5--FRAC--.,PWR)--2 -

0L GRP 5 POS = (i72.5:x FRAC. PWR) - 64.5 0.6 0

0.5 42.* ..., .. . * ..... . . . . *...... *..... . . . . . . . . . . . :........

z 0.4 0

P-Ui 0.3 s*..:i*...*\ .....*.... .*.....

. ....... I.......

0.2 0.1 II 0.0 GROUP5 GROUP 3 GROUP 1 I I I I I I I I I I I I I I i I FW* 120 90 60 30 0 FW* 120 90 60 30 0 FW* 120 90 60 30 0 GROUP 4 GROUP 2 F 1 0 9+0 6+0 10I I" ItF* It10 0 0 3+0 CEA POSITION (INCHES WITHDRAWN)

Fully Withdrawn (FW) is defined as > 147.75" (Pulse Counter) and > 145.25" (RSPT).

Page 15 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 FIGURE 3.1.7-2 CEA INSERTION LIMITS VERSUS THERMAL POWER (COLSS OUT OF SERVICE) 1.0 1 I1 1 I I I 0.9 [

0.8 - ..... (SEE-FOOTNOTE IN SECTION-3;1-77.......

FOR APPLI-CABILITY FOLLOWING E.RC AREACTOR k .....O.. . BA . ...... .......

CUTBACK)- ......... . ...

0.7 -

0.6 - ---- GRP 4POS-= (250.9 x-FRAC;PWR) ÷ 9.82--

0 6z GRP 5 POS = (250.9 x FRAC. PWR)- 80.18 F-.

0.5 1 o Z 0

z 0.4 0

U o u2 0.3 W Z:

Oý --------------------------------------------------

0.2 -.

0.1 0.0 04:

111.11.I.

GROUP5 GROUP3 GROUP I I I I I I I I I I I I I I I I I i I FW* 120 90 60 30 0 FW* 120 90 60 30 0 FW* 120 90 60 30 0 GROUP 4 GROUP 2

T09 310 It 0F* 3060 30 CEA POSITION (INCHES WITHDRAWN)

Fully Withdrawn (FW) is defined as > 147.75" (Pulse Counter) and > 145.25" (RSPT).

Page 16 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 FIGURE 3.1.8-1 PART STRENGTH CEA INSERTION LIMITS VERSUS THERMAL POWER 10.0 20.0 30.0 40.0 ......

z

0. : ............................

............. ............... . .. ......................... 7.........................

X 5 0 .0 . ...... .................. ............. : . .............. ........ ..... ............. ............. .......... ............. ............

0 6=0.0 . . .... P...... E , T - -O N....... ......... -- . .--

TRANSIENT ...... ............

INSERTION LIMIT ...........

....... (75105I ............

INCHESE o0 80.0 ------

Z 17 0.0 . ............ ............. ............. i............. ........... , -............. i ............. ; ............. .........................

190.0..PERA 0.0 ............ T.ONO.E -...... . ....... . ..........

12 ... .........

o~~o UNACCEPTATBLE

..... T R

............ ESTRICTED S 100 .0 .. -----..... ,-- .........

LONG TERM STEADY STATE INSERTIONIMITS0 (112.5 NCHES) 120.0 -,----- .... ......... .... ... ...... .. .... ... .. ..... . . . .... .......

14 0.0 . ........... .............. I............. I...... . . . i .......... !. .......... ! ..... ...................... ............. ...........

130.0 .......... ........ .. .. . ...... -------............. .. ....... ............. ............

OPERATION ACCItPTABLE 140.0 . . . . . . .

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 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 FIGURE 3.2.3-1 AZIMUTHAL POWER TILT VERSUS THERMAL POWER (COLSS IN SERVICE) 20.0 . ' .' .' .. . . . . . i .. . . I . . .

15.0 ...REGION-OV .............. ...............

UNACCEPTABLE OPERATION 0 10.0 - . -

5.0 .......

REGION OF ACCEPTABLE OPERATION 0.0 . . . . . I I I I I I 20.00 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 CORE POWER LEVEL

(% OF RATED THERMAL POWER)

Page 18 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 FIGURE 3.2.4-1 COLSS DNBR OPERATING LIMIT ALLOWANCE FOR BOTH CEACs INOPERABLE IN ANY OPERABLE CPC CHANNEL 25 20 [.... .................. ........................

z 0

15 -" .................. ........................

10 V- - ---- ------- -- 4 ...........

tu° z0 5

(80,5)

(70,0) I 0

50 60 70 80 90 100 CORE POWER LEVEL

(% OF RATED THERMAL POWER)

Page 19 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 FIGURE 3.2.4-2 DNBR MARGIN OPERATING LIMIT BASED ON THE CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, CEAC(s) OPERABLE) 2.5 ... ... . . .. ....... . . . . .. ..... .. ....... .........

ACCEPTABLE OPERATION ANY POWER LEVEL AT LEAST 1 CEAC OPERABLE IN EACH OPERABLE CPC CHANNEL 2.4 . ............... :................ . ................. :................. .................. .................. .. ............... ................

(0.. 2.6 .38) (0.1,2.38)i

(-0.1,2.28) z 2.2 ................ ................. .............. ..................... ................... *............. .................. ..................

ACCEPTABLE OPERATION POWER AT OR ABOVE 90%

AT LEAST I CEAC OPERABLE IN

) 2.1 . ............... ................. EACH'CPERA-BIE'CpC C" HA-NNEL--* ..... ...............

(0.05,2.00) 2.0 ... ------ ..--- . -................. . .. .,-....... . .2.00).

(11.93) UNACCEPTABLE 1.9 ................-................. i.................. ....OPERATION .......................................

1.9....................PERATIO 1.8 .. . . . . . . . t.. . . . . . . .. . . .. . .. . . .I . . . . . . .. . . . . . . . . .t . . . . . . . . . . . . . . . .t . . . . . . . . .

-0.20 -0.15 -0.10 -0.05 0.00 0.05 0.10 0.15 0.20 CORE AVERAGE ASI Page 20 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 FIGURE 3.2.4-3 DNBR MARGIN OPERATING LIMIT BASED ON THE CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, BOTH CEACs INOPERABLE IN ANY OPERABLE CPC CHANNEL) 3.6 . . . . . . . . . 1 . . . . . . . . .

ACCEPTABLE OPERATION ANY POWER LEVEL 3.5 BOTH CEACs INOPERABLE E -BE................. e ......

IN ANY OPERABLE CPC CHANNEL 3.4 ............. .......

3.3 .................

u (-0. ,3.27)

CU 3.2 ................

UNACCEPTABLE OPERATION 3.1 .....................

. . . . . . . . . I . . . . . . . . . I 3.0 . .. . . . .. I . . . . . . . . I.. . .. l

.l . . . . . . . . . . . . . . . . . . .. .

-0.220 -0.15 -0.10 -0.05 0.00 0.05 0.10 0.15 0.20 CORE AVERAGE ASI Page 21 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 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 22 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 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 Ž Keff > 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 23 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 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 > Keff> 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 I hour 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 24 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 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 25 of 26

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 17 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 26 of 26

ML11129A031

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Dear Sirs:

Subject:

Enclosure:

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