Text

Core Operating Limits Reports (Colr), Unit 1 - Revision 12, Unit 2 - Revision 11, and Unit 3 - Revision 13
	ML042530164
Person / Time
Site:	Palo Verde
Issue date:	08/31/2004
From:	Bauer S; Arizona Public Service Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	102-05144-SAB/TNW/JAP
	Download: ML042530164 (80)
	v • d • e

JL Scott A. Bauer Department Leader Regulatory Affairs Tel: 623/393-5978 Mail Station 7636 Palo Verde Nuclear Fax: 6231393-5442 P.O. Box 52034 Generating Station e-mail: sbauer~apsc.cbm Phoenix, AZ 85072-2034 102-05144-SAB/TNW/JAP August 31, 2004 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)

Units 1, 2, and 3 Docket Nos. STN 50-52815291530 Core Operating Limits Reports (COLR), Unit 1- Revision 12, Unit 2- Revision 11, and Unit 3- Revision 13 Pursuant to PVNGS Technical Specifications, Section 5.6.5.d, enclosed is Unit 1-Revision 12, Unit 2-Revision 11, and Unit 3-Revision 13 COLRs, which were made effective on August 5, 2004. These revisions of the COLRs consist of updating the list of Analytical Methods contained in the COLR. Specifically, the CENTS code, CE-NPD 282-P-A, was updated to reflect the use and application of Revision 1.

These revisions replace the previous Unit 1 (Revision 11), Unit 2 (Revision 10), and Unit 3 (Revision 12) COLRs.

This letter does not make any commitments to the NRC.

Please contact Thomas N. Weber at (623) 393-5764 if you have any questions or require additional information.

Sincerely, SAB/TNW/JAP

Enclosures:

1. Core Operating Limits Report for PVNGS Unit 1-Revision 12

2. Core Operating Limits Report for PVNGS Unit 2-Revision 11

3. Core Operating Limits Report for PVNGS Unit 3-Revision 13 cc: B. S. Mallett NRC Region IV Regional Administrator M. B. Fields NRC NRR Project Manager N. L. Salgado NRC Senior Resident Inspector for PVNGS

(

A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

Comanche Peak

Diablo Canyon

Palo Verde

South Texas Project

Wolf Creek

Enclosure 1 Core Operating Limits Report for PVNGS Unit 1, Revision 12

Revision 12 I PVNGS UNIT I CORE OPERATING LIMITS REPORT CORE OPERATING LIMITS REPORT PALO VERDE NUCLEAR GENERATING STATION (PV7NGS)

UNIT 1 Revision 12 I Responsible Engineer Digitally signed by: Foster, Glenn Date A(Z35831)

Date: 07/29/2004 15:20:16 Reason: I am the author of this document Location: PVNGS Independent Reviewer Digitally signed by: Hwang, Lun-Chih (ZO1 668)

Date Date: 07/2912004 16:04:55 Reason: I have reviewed this document Location: PVNGS Responsible Section Leader Digitally signed by: Cannon, Thomas Date C(Z20485)

Date: 07/29/2004 16:31:18 Reason: I am approving this document Location: PVNGS Page 1

Revision 12 PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Table of Contents Description Revision # Page Cover Page Table of Contents List of Figures 12 12 11 1

2 3

I List of Tables 11 4 Affected Technical Specifications 11 5 Analytical Methods 11 6 12 7 CORE Operating Limits 3.1.1 Shutdown Margin (SDM) - Reactor Trip Breakers Open 11 8 3.1.2 Shutdown Margin (SDM) - Reactor Trip Breakers Closed 11 8 3.1.4 Moderator Temperature Coefficient (MTC) 11 8 3.1.5 Control Element Assembly (CEA) Alignment 11 8 3.1.7 Regulating CEA Insertion Limits 11 8 3.1.8 Part Strength CEA Insertion Limits 11 9 3.2.1 Linear Heat Rate (LHR) 11 9 3.2.3 Azimuthal Power Tilt (Tq) I1 9

3.2.4 Departure From Nucleate Boiling Ratio (DNBR) 11 9 3.2.5 Axial Shape Index (ASI) 11 10 3.3.12 Boron Dilution Alarm System (BDAS) 11 10 3.9.1 Boron Concentration 11 10 Page 2

Revision 11 PNYNGS UNIT I CORE OPERATING LIMITS REPORT List of Figures Description Revision # Paie Figure 3.1.1-1 Shutdown Margin Versus Cold Leg Temperature 11 11 Reactor Trip Breakers Open Figure 3.1.2-1 Shutdown Margin Versus Cold Leg Temperature I1I 12 Reactor Trip Breakers Closed Figure 3.1.4-1 MTC Acceptable Operation, Modes I and 2 11 13 Figure 3.1.5-1 Core Power Limit After CEA Deviation 11 14 Figure 3.1.7-1 CEA Insertion Limits Versus Thermal Power 11 15 (COLSS in Service)

Figure 3.1.7-2 CEA Insertion Limits Versus Thermal Power 11 16 (COLSS Out of Service)

Figure 3.1.8-1 Part Strength CEA Insertion Limits Versus Thermal Power 11, 17 Figure 3.2.3-1 Azimuthal Power Tilt Versus Thermal Power 11 18 (COLSS in Service)

Figure 3.2.4-1 COLSS DNBR Operating Limit Allowance for Both 11 19 CEACs Inoperable Figure 3.2.4-2 DNBR Margin Operating Limit Based on the Core 11 20 Protection Calculators (COLSS Out of Service, CEACs Operable)

Figure 3.2.4-3 DNBR Margin Operating Limit Based on the Core 11 21 Protection Calculators (COLSS Out of Service, CEACs Inoperable)

Page 3

Revision 11 PVNGS UNIT I CORE OPERATING LIMITS REPORT List of Tables Description Revision # Page Table 3.3.12-1 Required Monitoring Frequencies for Backup Boron 11 22 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for Keffl 0.98 Table 3.3.12-2 Required Monitoring Frequencies for Backup Boron 11 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 11 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 11 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 I1 26 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for Keff < 0.95 Page 4

Revision 11 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 PVrNGS 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

Revision 11 PV7NGS 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 (13-N0O1-1301-01204-1)

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

Codes for Nuclear Design 266-P-A (13-NOOI-1900-01412-0)

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

of Uncertainties 356(V)-P-A (ARI) (April 1996)

(13-NOOI-1303-01747-2)

4) System 8 0 TM Inlet Flow Distribu- Enclosure N.A. February 1993 I-P tion 1-P to LD-(13-NOO1-1301-01228-0)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 (13-NOOI-1900-01192-3)

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

7) Fuel Rod Maximum Allowable CEN-372- N.A. May 1990 N.A.

Pressure P-A (13-NOOI-0201-00026-1)

8) Arizona Public Service Company N.A. N.A. September N.A.

PWR Reactor Physics Methodology 1999 Using CASMO-4/SIMULATE-3 (NFM-002)

Page 6

Revision 12 l PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Title Report No. Rev Date Supplement

9) Technical Description Manual for CE-NPD I April 2004 N.A. I the CENTS Code 282-P-A (13-N001-1303-02349-2 for Vol. 1-4) Vols. 1-4 I

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

Cladding Material in CE Nuclear 404-P-A 2001 Power Fuel Assembly Designs (13-N001 -1900-01329-0)

Page 7

Revision 11 PVNGS UNIT I 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 (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.

3.1.7 - Reiulatini CEA Insertion Limits One or more CEACs OPERABLE: 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, regulation CEA groups shall be limited to the withdrawal sequence and to the insertion limits1 shown in Figure 3.1.7-2.2 l 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

Revision 11 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 Strength CEA Insertion Limits One or more CEACs OPERABLE: 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 - 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

Revision 11 PVNGS UNIT I 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 forpower> 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 > 3000 ppm.

Page 10

PVNGS UNIT 1 CORE OPERATING LIMITS REPORT Revision 11 FIGURE 3.1.1-1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS OPEN

.REGION OF (0,0 ACCEPTABLE OPERATION i( i0i1i0i z

RGION 'OF UNACCEPTABLE OPERATION i i i. i.

j; ; (350, 1.0);

I . . . . . I . . I . . . I . . . . .:.. .. . . .

n ......... i 0 100 200 300 400 500 600 COLD LEG TEMPERATURE (°F)

Page 11

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

i (500,6.5):

6

- REQION OF A CCEPTABLE~

5 ......... OPERA-T-ION-.............

4 z * (3504.0)

z z

0 3 REGION OF.

UNACCEPTABLE2 2

PERATON i 0

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

Page 12

PVNGS UNIT I CORE OPERATING LIMITS REPORT Revision 1I1 FIGURE 3.1.4-1 MTC ACCEPTABLE OPERATION, MODES 1 AND 2 0.5 - d',6@ A,', , ,6. I . . I. . I.. I.. I.. I T-

(0%,,0.5 bb... -- v ; i 1 0 0.0 i ii(100%,-0.2

-0.5 -(0%, 3 4,)

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

-1.0 0-iM.. ,.i.;.;.;. CA E-O C-X -1.5 i § i ACCEPTABL3Ei

-2.0 ..... .............. O P.E R ATION ........... ............... .....

0 . ... . .... . . . . . .. .. . .. . .. . . . . . .. . . . . . I. .. . .. .. .. . .. . .. . ... . . . . . .. .. .. . .. .. . .. .. .

H

-2.5 0

-3.0

-3.5

-4.0

-4.5 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 a a" al vw#

Page 13

PVNGS UNIT I CORE OPERATING LIMITS REPORT Revision I I FIGURE 3.1.5-1 CORE POWER LIMIT AFTER CEA DEVIATION*

30

' .. ...... .. .. ... .. .. ........ .I................ .............. .. .I...... .....

25 z

0 r-uI C4 20 D w a r 2 0cw C4 -)

0 CL4 15 .................... .................. ;,,,

0;z 0

D 1 : ........ . ............ ............ ........................

94 re.

u

0 ID

8 10 z

E 5

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

WHEN CORE POWER IS REDUCED TO 55% OF RATED THERMAL POWER PER THIS LIMIT CURVE, FURTHER REDUCTION IS NOT REQUIRED.

Page 14

PVNGS UNIT I CORE OPERATING LIMITS REPORT Revision I I FIGURE 3.1.7-1 CEA INSERTION LIMITS VERSUS THERMAL POWER (COLSS IN SERVICE) 1.0 0.9 . .........

... ..... ... (PEE-FOOTNOTE JN -SECTION-3llf ........

I ARPPLICk-BILiTY F'OLL OWING:

A REACTOR dCUTOBACK.....

0.8 C4 0.7 ....

..... ... 4....GRP PO 0 6, RPSPOS (172.5:x FRAC.PiWR) -64.5 0.6 LL]

cz 0.5

.1

zo 0.4 ' L

_ mr~ *ZU~ u u

ct 0.3 I .m . .. . . . . . . . .. . . . .. . . ... .... .. .. .. .. . . . . . . . . . . .. . .

0.2 LU 1 1 1 I I 0.1 0.0 GROUP 5 I I I I GROUP I I 3 I I I I GROUP I I 1 I I I I I I I I I I I I I I -I I - Il I I - - - _ _ _

150 120 90 i50 30 0 150 120 90 60 30 0 150 120 90 60 30 0 GROUP 4 GROUP 2 I I I I I I I I I I I I I I I I I l _ l l l l l e

180 120 Yo do Sbo 6 1o 1i0 o do0 3'0 o CEA POSITION (INCHES WITHDRAWN)

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PVNGS UNIT 1 CORE OPERATING LIMITS REPORTReionI Revision I I FIGURE 3.1.7-2 CEA INSERTION LIMITS VERSUS THERMAL POWER (COLSS OUT OF SERVICE) 1.0 0.9 0.8 ..... .................. - ... (SEE FOOTNO-T-E IN SEC-T-ION 3;17 ......

FOR APPIACABILITY FOLLO'WING

.

A:REACTOR CUTBACK 0.7 w

0.6 ............. .... GRP 4 POS-=--~2§09 i.FRAC;PR 98 d RP POE; (2s0.9 iFRAC. PI~VR) - 80.18 0

z:L 0-- 0.5 . . ..... . .

5U

~UCIO) 0.4 I .. . .. . . . . . ..-. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0.3 Za ii..iii mmpnn s 0.2 I .. . . . . . . .. . . . . . . .. . .. .. . . . .. . .. . . . . . . .. . . . . . . . . . .

0.1 0.0 GROUP 5 GROUP 3 GROUP I I I I I I I I I I I I I I _ I I_ I ____I I I I I I I I I I I I I I I I I I I I 150 120 90 60 30 0 150 120 90 60 30 0 150 120 90 60 30 0 GROUP 4 GROUP 2 I I I I I I I I l 0 i10 91 do 60 g 6 l o 110 4Jo do go 6 CEA POSlTION (INCHES WITHDRAWN)

Page 16

PVNGS UNIT I CORE OPERATING LIMITS REPORTReion1 Revision I I FIGURE 3.1.8-1 PART STRENGTH CEA INSERTION LIMITS VERSUS THERMAL POWER 0.0 - ! - - , . . .T Y - II. Y . - * - * - . . . . . - - - - - .

10.0 ............. ..............I..............I............ T

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

20.0 30.0 zI--

I-9 40.0 ...........................

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

50.0 ------------- ............. ........ ............ .........

F m 60.0 ......................................... ............ ..........

u z

z 70.0 ........................... ........................... ...........

TRANSIENT INSERTION LIMIT (75.0'INCHES) a . - * -U - .

cn ............. ...........

0 80.0 . . . .. .

0. *.

w . .. .... ... .... .... .... ....

u 90.0 OPERA-TION PERA-TION .............

F.

0z .UNACCEPTABLE 100.0 . .... .... .. ... .. .. .. .. .. .. .. .. .. . ............. 'RESTRICTED ............. ............. ............ ..........

w fcn 110.0 . .. . .. . . .. . . . . .. . . . . . . . . . . . . . . . . . ............ .......................................... I...........

- - - - . - U- U 2 LON4G TERM STEADy STATE INS] ' RTION:LIMITS: (I 12.5 INCHES) 0< 120.0 ............. .............................. ..........

130.0 ............. ........................... ........................

OPERATION ACCI ;PTABLE, 140.0 . ........................... ............. ............. ............. .............. ..........-

150.0 . . . . . . . . - - -

1.o 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

PVNGS UNIT 1 CORE OPERATING LIMITS REPORTReion1 Revision I 1 FIGURE 3.2.3-1 AZIMUTHAL POWER TILT VERSUS THERMAL POWER (COLSS IN SERVICE) 20.0 -------- ------------------------

15.0 REGION OF 1-S UNA CCEPTABLE OPERATION 0 10.0 N

5.0 REGION OF ACCEPTABLE OPERATION nn

%J .'J t

20.0 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

PVNGS UNIT 1 CORE OPERATING LIMITS REPORTReion1 Revision I I FIGURE 3.2.4-1 COLSS DNBR OPERATING LIMIT ALLOWANCE FOR BOTH CEAC's INOPERABLE 25 z0 (20,95.0) 20 U

15 C/2 0~ 10 U;

5 (0.0,75.0 0

0 25 50 75 100 CORE POWER LEVEL

(% OF RATED THERMAL POWER)

Page 19

PVNGS UNIT ] CORE OPERATING LIMITS REPORT Revisi on 1 1 FIGURE 3.2.4-2 DNBR MARGIN OPERATING LIMIT BASED ON THE CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, CEAC's OPERABLE) 4.:, II .I IjII~ ~1151 II I ACCEPTABLE OPERATION ANY PONAWER LEVEL MINIMUM OF 1 CEAC OPERABL 2.4 .....

~................................. .................:.

2.3

I

I : R

:: :2 2.2 .............. ................. .. _... .. .. .

U4 CU O R. . . I POWVER AT OR ABOVrE 90%;

2.1 -. I .. ...............................

MINIMUM OF 1.CEAC OPERABLF ACUNCCEPTABEPRAIONE

. . (0 0512 03);

*~m..--......

2.0 * . :... (0.1,2..03.............

E,*

I) UNACCEPTABLE 1.9 .. I OPERAiTION I

.I.I.I.

1 I- . .-.-.-.-.-.-.-.-. .-.-.-.-.-.-.-.-.-. .-.-.-.-.-.-.-.-.-. .-.-.-.-.-.-. . . . . .

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

PVNGS UNIT I CORE OPERATING LIMITS REPORT Revision II 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 ............... ................ ................ ..............

A CCh-PTABLE OPERATION ANY: POWE LEVEL CEA C'sINOPERABLE 3.4 . . .. -

U4 3.3 32)

(0.1,3.32 cl

i. ..

3.2

(_0. 1,3.19)

UNA CZEPTAtLE 3.1 P IOPERATION

-, I%

3.U.

I

.~ . . ~ ~----------------- - ---- . . . . .

-0.20 -0.15 -0.10 -0.05 0.00 0.05 0.10 0.15 0.20 CORE AVERAGE ASI Page 21

Revision 11 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 22

Revision 11 PVrNGS 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 2 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

Revision 11 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 2 Kefr> 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 24

Revision 11 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 2 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 I hour 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

Revision 11 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 26

Enclosure 2 Core Operating Limits Report for PVNGS Unit 2, Revision 11

Revision 11 I PNTNGS UNIT 2 CORE OPERATING LIMITS REPORT CORE OPERATING LIMITS REPORT PALO VERDE NUCLEAR GENERATING STATION (PVNGS)

UNIT 2 Revision 11 I Responsible Engineer Digitally signed by: Foster, Glenn Date A(Z35831)

Date: 07/29/2004 15:25:03 Reason: I am theauthor of this document Location: PVNGS Independent Reviewer Digitally signed by: Hwang, Lun-Chih Date (ZO1668)

Date: 07/29/2004 16:08:50 Reason: I have reviewed this document Location: PVNGS Responsible Section Leader Digitally signed by: Cannon, Thomas Date C(Z20485)

Date: 07/29/2004 16:28:28 Reason: I am approving this document Location: PVNGS ,,I Page 1 of 25

Revision 11 PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Table of Contents Description Revision # Page Cover Page 11 1 Table of Contents 11 2 List of Figures 9 3 List of Tables 8 4 Affected Technical Specifications 8 5 Analytical Methods 10 6 11 7 CORE Operating Limits 3.1.1 Shutdown Margin (SDM) - Reactor Trip Breakers Open 10 8 3.1.2 Shutdown Margin (SDM) - Reactor Trip Breakers Closed 10 8 3.1.4 Moderator Temperature Coefficient (MTC) 10 8 3.1.5 Control Element Assembly (CEA) Alignment 10 8 3.1.7 Regulating CEA Insertion Limits 10 8 3.1.8 Part Length CEA Insertion Limits 9 9 3.2.1 Linear Heat Rate (LHR) 9 9 3.2.3 Azimuthal Power Tilt (Tq) 9 9 3.2.4 Departure From Nucleate Boiling Ratio (DNBR) 9 9 3.2.5 Axial Shape Index (ASI) 9 10 3.3.12 Boron Dilution Alarm System (BDAS) 9 10 3.9.1 Boron Concentration 9 10 Page 2 of 25

Revision 9 PVNGS UNIT 2 CORE OPERATING LIMITS REPORT List of Figures Description Revision # Page Figure 3.1.1-1 Shutdown Margin Versus Cold Leg Temperature 8 I1I 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 9 18 CEACs Inoperable In Any Operable CPC Channel Figure 3.2.4-2 DNBR Margin Operating Limit Based on the Core 9 19 Protection Calculators (COLSS Out of Service, CEAC(s)

Operable)

Figure 3.2.4-3 DNBR Margin Operating Limit Based on the Core 9 20 Protection Calculators (COLSS Out of Service, Both CEACs Inoperable In Any Operable CPC Channel)

Page 3 of 25

Revision 8 PVNGS UNIT 2 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 2 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 2 Technical Specifications.

AFFECTED PVrNGS 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 10 PVNGS UNIT 2 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 (13-NOO1-1301-01204-1)

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

Codes for Nuclear Design 266-P-A (13-N001-1900-01412-0)

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

Uncertainties 356(V)-P-A (ARI) (April 1996)

(13-NOO -1303-01747-2)

4) System 80TM Inlet Flow Distribu- Enclosure N.A. February 1993 1-P tion I-P to LD-(13-NOO1-1301-01228-0)82-054

5) Calculative Methods for the CE CENPD- N.A. March 2001 4-P-A Large Break LOCA Evaluation Model 132 for the Analysis of CE and W Designed NSSS (13-NOOI-1900-01192-3)

6) Calculative Methods for the CE CENPD- N.A. April 1998 2-P-A Small Break LOCA Evaluation Model 137-P (13-NO01-1900-01185-3)

7) Fuel Rod Maximum Allowable CEN-372- N.A. May 1990 N.A.

Pressure P-A (13-N001-0201-00026-1)

8) Arizona Public Service Company N.A. N.A. September 1999 N.A.

PWR Reactor Physics Methodology Using CASMO-4/SIMULATE-3 (NFM-002)

Page 6 of 25

Revision II PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Title Report No. Rev Date Supplement

9) Technical Description Manual for CE-NPD 1 April 2004 N.A. I the CENTS Code 282-P-A (13-N001-1303-02349-2 for Vol. 1-4) Vols. 1-4 I

10) Implementation of ZIRLOTM CENPD- 0 November 2001 N.A.

Cladding Material in CE Nuclear 404-P-A Power Fuel Assembly Designs (13-NOOl-l 900-01329-0)

Page 7 of 25

Revision 10 PVNGS UNIT 2 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 (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-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 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, regulation CEA 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 9 PVNGS UNIT 2 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 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 20%.

3.2.4 - Departure From Nucleate Boilin! Ratio (DNBR)

COLSS IN SERVICE and Both CEACs INOPERABLE in Any OPERABLE CPC Channel - 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, CEAC(s) OPERABLE - Operating 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 - Operating within the region of acceptable operation of Figure 3.2.4-3 using any operable CPC channel with both CEACs INOPERABLE.

Page 9 of 25

Revision 9 PVNGS UNIT 2 CORE OPERATING LIMITS REPORT 3.2.5 - Axial Shape Index (AST)

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 ReactorCoolant System and the refueling canal shall be maintained at a uniform concentration 2 3000 ppm.

Page 10 of 25

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 8 FIGURE 3.1. 1-1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS OPEN 7 -----------------------------------------------------------

'......................§ l g l I .......

,- I. .. .....

~. .........

6 I ....... ..........( .'0) 5 .................. ... .................................................

REGION OF .............. ........ .. ..........

ACCEPTABLE OPERATION ! EINO UNACPABL

-4 . ...................... .. ........... ... .......... j........ . ............ .............

OPERTIO a

z 033 _ ...................... ....................... ........................

a cn 2 _ .............

. * (350,1.0) 0 0 100 200 300 400 500 600 COLD LEG TEMPERATURE (F)

Page 11 of 25

PVNGS UNIT 2 CORE OPERATING LLITS REPORT Revision 8 FIGURE 3.1.2-1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS CLOSED 7 ... R ...... ll ...... ...... alsl (500,6.5)1 REGION OF ACCEPTABLE 5.........OPVERA-TION--:.........

S -----

PERA ION .- ------ , -- *.-.y.. .... . ............. ......................

Z , (350,4.0)

U) REGION OF 33_..... . . .. . . .. . . I .. . . .. . . .. . . . UNACCEPTABLE

'OPERATION

. . . , . I 0 . . .... . . . . . ... . . . I.. ...... ......

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

Page 12 of 25

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

-*"..'.,e's;'.,,, .k .... i o%,o.5') . *t1Move :.. .,. . ..... . ......

........... ..... I.... ... ,, , ............ o%

0.0 (50%,,0) ......

-0.5 0.

'1~ -1.0

-1.5 0 -ACCEPTABLE

-2.0 i... . . ....... . .........

Lu -2.5 0

-3.0

-3.5

-4.0

..L.L.LL I~L.L..L i..L.LL.L I.L...L.L. .L.L. LI.L..L.J....

.. ....L.. .L. . . ..L.......... ......... . .L

-4.5 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

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 8 FIGURE 3.1.5-1 CORE POWER LIMIT AFTER CEA DEVIATION*

30 25 z

0 t R 20

) w p >'

WO C4 O ~~............ . ............ ... ..........................................

C4 j

E 0

r- Ww 15 n x ............ ............. ........ ... ...

W in 5

aw 1%

E 0Li.

.2 L-R 10

D z

5 0

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

WHEN CORE POWER IS REDUCED TO 55% OF RATED THERMAL POWER PER THIS LIMIT CURVE, FURTHER REDUCTION IS NOT REQUIRED.

Page 14 of 25

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 9 FIGURE 3.1.7-1 CEA INSERTION LIMITS VERSUS THERMAL POWER (COLSS IN SERVICE) 1.0

. : . . ., , . , i i 0.9 ... .. ..... .- ... (SEEFOOTNOTE IN S-STION *3-1-7 -*

FOR APPLICABILITY FOLLOlWING .

0.8 _ \ _ A REACTO.R C.UTBACK) 0.7 ....

........ . ... :.....GRP 4 POS =(172.5.' FRAUC-PWR) +-2~5

.cPWR .

GRP5POS (i72.5:' FRA - 64.5

~: l c : : :

0.6 W. * t \ O

......... , .... , ..... ....... I.... I .....

0.5 co , : \ ' ' ' ' '

0 OZ* z: ' ........... ..... .... . ............. I..... I...... . ..... .¢F~;

Z 0.4

. a ... i .. aU-.. . ' . *.

WL. 0.3 0.2 .I I V.>14\ i I i I 3 > 1 i .; I I -

0.1 0.0 GROUP 5 GROUP 3 GROUP I ji I lI l I 1I t 1 1 1 1 11 I 150 120 90 60 30 0 150 120 90 60 30 0 150 120 90 60 30 0 GROUP 4 GROUP 2 150 It0 9+0 30t 0 150 I20 90 60 30t0 CEA POSITION (INCHES WITHDRAWN)

Page 15 of 25

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 9 FIGURE 3.1.7-2 CEA INSERTION LIMITS VERSUS THERMAL POWER (COLSS OUT OF SERVICE) 1.0 0.9

.... 41... ... . j. A.' '. .. '....K .... .. .. ..' .......

0.8 ..... .. .................... .... ... (SEE _j. .. ..FOOTNOTE

.. .... I........'_ '_ IN-SEC-TION 3;1;7.

FOR APPJICABILITY F. LLb VING I

.. A -REACTOR CUJTBAC) 0.7 0.6

.... P... GR4 POS =-2,-094krRAC.-PWR~+*982~--

04 z

0* GRP POS (250O9xiFRkC PWNR) -8018 a L u- ... I . . . . . . . . . . . . . . . . . ....... . . . . . .. . ..... . . . . . . . . . . . . . . .

0.5 04

. j j4....

.... . j ..... j ......... i.i.i.i. & .... . .~..i ...........4.

LI 0 0.4 0.3 M

_ ..... ... C .. .....

0.2 0.1 0.0 GROUP 5 GROUP 3 GROUP I I I I I I I I I I I i i I I 150 120 90 60 30 0 150 120 90 60 30 0 150 120 90 60 30 0 GROUP 4 GROUP 2 I CE0A0 9 S6T 3ION ( C W IT HDdRA ) 3N 0 CEA POSITION (INCHES WITHDRAWN)

Page 16 of 25

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 8 FIGURE 3.1.8-1 PART LENGTH CEA INSERTION LIMITS VERSUS THERMAL POWER 0.0

~~~. .............. .........................................

,..... I....I ... .... ... .I .......

10.0 20.0 30.0 3

40.0 v:

50.0 w 60.0 70.0 INSETION LIMI (75.O.INCHES) z .. .. ..RANSIENT !

td_

0 80.0 .......

0 ** ............. .......

ABLE' ....... _...... ...... .....

90.0 ................................................

. .. OP.RA..ON.

. . . . . . ........ ............... ............. ............. OPERATI.N.............

.-i UNACCEPTABLE P RESTRICTED 100.0

.A*. OPR 7E'. TO TABLiEN iNERiNLiT(5 NCS cz . . . :.... . . . . . .. . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . ... . .. . . . . . . . . . . ... . . ..

110.0 LONG TE'RMSTE-AbYsTATE INSE~RTION; LIMITS! (112.SIN4CHE-S) 120.0 _ ,: .... . . . . . ..........

130.0 140.0 150.0

.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 2 CORE OPERATING LIMITS REPORT Revision 9 FIGURE 3.2.4-1 COLSS DNBR OPERATING LIMIT ALLOWANCE FOR BOTH CEACs INOPERABLE IN ANY OPERABLE CPC CHANNEL 25 z

0 (20,95.0) 20 W.-, 15 2z 10 0

Ro 5

(0.0,75.0) 0 .......................................

0 25 50 75 100 CORE POWER LEVEL

(% OF RATED THERMAL POWER)

Page 18 of 25

PVNGS UNIT 2 CORE OPERATING LIMITS REPORT Revision 9 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 LLNELE AT LEAST I CEAC OPERABLE IN

............... ................ EACH 6PERABiE CPC CHANNEL 2.4 (0.06,2:382 (0. 1,2.38) 2.3

(-p.1,2.28) . . .,I

.I

. . . I

. 8.

z * . . I Q 2.2 !* . I ACCEEiTABLE&OERATION * . .I POWVER AT OR ABOVE 96%

z AT LEAST I CEAC OPERABLE I ................ 0 ..............

2.1 _ .............. ................ 4 ................................................... ................

U EACH 6PERABILE CPC CUANNEJ U

I.

2.0 .............. ................. ......... OPEJ RlC ATION--:Ll~ ...................... ................... _

I . ,

UNACC EPTA9ILE 1.9 _............... ................. i ., 06 .......

iR I. . .

-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 2 CORE OPERATING LIMITS REPORT Revision 9 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 ACCEPTABLE OPERATION ANY POWER LEVEL 3.5 _............................... 3BOTH CEACs :INOP-ERABLE - ............... ...............

IN ANY OPERABLE CPC CHANNEL 3.4 *(Q.1,34t)

U4 _.............. .................. .............

3.3 cU 1,3.27) ................ .........................

3.2 UNACCEPTABLE

_................................ OPERATION ................. ...............

3.1 ......

..I ' , . .

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

'An 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 2 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 2 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 2 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 22 of 25

Revision 8 PVNGS UNIT 2 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 2 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 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 2 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 Ž 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 2 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

Enclosure 3 Core Operating Limits Report for PVNGS Unit 3, Revision 13

Revision 13 I PVNGS UNIT 3 CORE OPERATING LIMITS REPORT CORE OPERATING LIMITS REPORT PALO VERDE NUCLEAR GENERATING STATION (PVNGS)

UNIT 3 Revision 13 I Resposibl EngneerDigitally signed by: Foster, Glenn Responsible Engineer A(Z35831) ate Date: 07/29/2004 17:02:08 Reason: I am the author of this document Location: PVNGS Independent Reviewer Digitally signed by: Hwang, Lun-Chih (Z01668)

Date Date: 07/29/2004 17:06:43 Reason: I have reviewed this document Location: PVNGS Responsible Section Leader Digitally signed by: Cannon, Thomas Date C(Z20485) L Date: 07/29/2004 17:11:48 Reason: I am approving this document Location: PVNGSf .. ,

Page l of 25

Revision 13 PVNGS UNIT 3 CORE OPERATING LIMITS REPORT Table of Contents Description Revision # Page Cover Page 13 1 Table of Contents 13 2 List of Figures 12 3 List of Tables 11 4 Affected Technical Specifications 11 5 Analytical Methods 12 6 13 7 CORE Operating Limits 3.1.1 Shutdown Margin (SDM) - Reactor Trip Breakers Open 12 8 3.1.2 Shutdown Margin (SDM) - Reactor Trip Breakers Closed 12 8 3.1.4 Moderator Temperature Coefficient (MTC) 12 8 3.1.5 Control Element Assembly (CEA) Alignment 12 8 3.1.7 Regulating CEA Insertion Limits 12 8 3.1.8 Part Length CEA Insertion Limits 12 9 3.2.1 Linear Heat Rate (LHR) 12 9 3.2.3 Azimuthal Power Tilt (Tq) 12 9 3.2.4 Departure From Nucleate Boiling Ratio (DNBR) 12 9 3.2.5 Axial Shape Index (ASI) 11 10 3.3.12 Boron Dilution Alarm System (BDAS) 11 10 3.9.1 Boron Concentration 11 10 Page 2 of 25

Revision 12 PVNGS UNIT 3 CORE OPERATING LIMITS REPORT List of Figures Description Revision # Page Figure 3.1.1-1 Shutdown Margin Versus Cold Leg Temperature 11 11 Reactor Trip Breakers Open Figure 3.1.2-1 Shutdown Margin Versus Cold Leg Temperature 11 12 Reactor Trip Breakers Closed Figure 3.1.4-1 MTC Acceptable Operation, Modes I and 2 11 13 Figure 3.1.5-1 Core Power Limit After CEA Deviation 11 14 Figure 3.1.7-1 CEA Insertion Limits Versus Thermal Power 12 15 (COLSS in Service)

Figure 3.1.7-2 CEA Insertion Limits Versus Thermal Power 12 16 (COLSS Out of Service)

Figure 3.1.8-1 Part Length CEA Insertion Limits Versus Thermal Power 11 17 Figure 3.2.4-1 COLSS DNBR Operating Limit Allowance for Both 11 18 CEACs Inoperable Figure 3.2.4-2 DNBR Margin Operating Limit Based on the Core 11 19 Protection Calculators (COLSS Out of Service, CEACs Operable)

Figure 3.2.4-3 DNBR Margin Operating Limit Based on the Core 11 20 Protection Calculators (COLSS Out of Service, CEACs Inoperable)

Page 3 of 25

Revision 11 PVNGS UNIT 3 CORE OPERATING LIMITS REPORT List of Tables Description Revision # Page Table 3.3.12-1 Required Monitoring Frequencies for Backup Boron 11 21 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for Keffl 0.98 Table 3.3.12-2 Required Monitoring Frequencies for Backup Boron 11 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 11 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 11 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 11 25 Dilution Detection as a Function of Operating Charging Pumps and Plant Operational Modes for Keff < 0.95 Page 4 of 25

Revision 11 PVNGS UNIT 3 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 3 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 12 PVNGS UNIT 3 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 (13-N0O1-1301-01204-1)

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

Codes for Nuclear Design 266-P-A (13-N001-1 900-01412-0)

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

of Uncertainties 356(V)-P-A (ARI) (April 1996)

(13-NO01 -1303-01747-2)

4) System 8 0 TM Inlet Flow Distribu- Enclosure N.A. February 1993 I-P tion 1-P to LD-(13-NOOI-1301-01228-0)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 (13-N001-1900-01192-3)

6) Calculative Methods for the CE CENPD- N.A. April 1998 2-P-A Small Break LOCA Evaluation 137-P Model (13-NO01 -1900-01185-3)

7) Fuel Rod Maximum Allowable CEN-372- N.A. May 1990 N.A.

Pressure P-A (13-NO01 -0201-00026-1)

8) Arizona Public Service Company N.A. N.A. September N.A.

PWR Reactor Physics Methodology 1999 Using CASMO-4/SIMULATE-3 (NFMO02)

Page 6 of 25

Revision 13 I PV`NGS UNIT 3 CORE OPERATING LIMITS REPORT Title Report No. Rev Date Supplement

9) Technical Description Manual for CE-NPD 1 April 2004 N.A. I the CENTS Code 282-P-A (13-N001-1303-02349-2 for Vol. 1-4) Vols. 1-4 I

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

Cladding Material in CE Nuclear 404-P-A 2001 Power Fuel Assembly Designs (13-N001 -1900-01329-0)

Page 7 of 25

Revision 12 PVNGS UNIT 3 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 (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-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 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, regulation CEA groups shall be limited to the withdrawal sequence and to the insertion limits1 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 12 PVNGS UNIT 3 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 (LHRJ 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 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 11 PVNGS UNIT 3 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 2 3000 ppm.

Page 10 of 25

PVNGS UNIT 3 CORE OPERATING LIMITS REPORT Revision 11 FIGURE 3.1 .1-1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS OPEN

7. . . . . . . . ..

.REGION OF(50)

ACCEPTABLE

.......... 3 .

OPERATION z

CS

---.-.-.-. 4................

REGION OFi .............

UNACCEPTABLE OPERATiON 30_.i.. _../I 2 .-----.-.------.-.-.-.-. ......... . ....... - --- i---.........-

(350,1.0) 0 100 200 300 400 500 600 COLD LEG TEMPERATURE (F)

Page 11 of 25

PVNGS UNIT 3 CORE OPERATING LIMITS REPORT Revision 11 FIGURE 3.1.2-1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS CLOSED 7 .. . . . . ......... ......... ......... . . . . .

(500,6.5)

REGION OF AC.CEPTABLE

5. ......... OPJERA TION -...........................................

REGIOGIO . OF (350 4.0) z

_. ................. .... ( 5.4..0)..

.UNACCEPTABLE

'OPERATION 0o _......................................... ......... .......... ......... .......................

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

Page 12 of 25

PVNGS UNIT 3 CORE OPERATING LIMITS REPORT Revision 11 FIGURE 3.1.4-1 MTC ACCEPTABLE OPERATION, MODES 1 AND 2 0.5 -'A' I. L . .'; ; i " i (0%,0.5) s.,,O 0

,,; '.,.,,,; ; *s*@'"ea...i.., k100,C 0.0 .: . . .......... ......... : ... ', I, .

(50%, 0.0) mm. ;

(100%,-0.3

-0.5 . . . . .............

- -1.0

) -1.5 . ........... .; ; .... ... -;E---

- MTC -AREA-OF----i ......... ; .......-...... .....

-2.i0ii ............ . . . ... . .. .

i -2.0 _ ;P.. ;

-2.5 .............

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

PVNGS UNIT 3 CORE OPERATING LIMITS REPORT Revision 11 FIGURE 3.1.5-1 CORE POWER LIMIT AFTER CEA DEVIATION*

30 ......... ......... . . . .....

zo (60 MIN, 20.0%)

0 2 5 . .......... . ............ . ...

25_. ji. ... . . . . . .. . . , . . . . . . . . .i 10 .

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

WHEN CORE POWER IS REDUCED TO 55% OF RATED THERMAL POWER PER THIS LIMIT CURVE, FURTHER REDUCTION IS NOT REQUIRED.

Page 14 of 25

PVNGS UNIT 3 CORE OPERATING LIMITS REPORT Revision 12 FIGURE 3.1.7-1 CEA INSERTION LIMITS VERSUS THERMAL POWER (COLSS IN SERVICE) 1.0

3 .\ : : : : :: : : : : : :

0.9 :ul\ : :

,a : : : : : : : : :

iFOR APPLICABILITY FOLLOWING,:

.. .,...3. . . . ,.,.. ,. . . .

0.8

.. .......... .......... U..

0.7

. .,. . . . . .-G.RP . . . . . . . . . .I. . . .I . . . . . . . .I 4 .0 . I .FO(172.

5A FRALCPWi) +2.5

........ \ ....... i.. .. .GRP --- -- 5P05

....... .. (172.5 RA.. ,CT. ., ................ x FRAC. PWR)

, .......................... 64.5 ...............

. : i 0.6 .,; \ .- ; ;. I wz 0

l:

0. 0.5 0 Ca 0.4 CZZ 0.3 i.I li i. i .ie... . . I. .....

0.2 0.1 ... ...... I i ..

0.0 I

GROUP5 A I I I I I GROUP3 I I I I I I GROUP I I I I 3 I I I I I I I I I I I a I I I I I I I I I I I I I 150 120 90 60 30 0 150 120 90 60 30 0 150 120 90 60 30 0 GROUP4 GROUP2 I I I I I I I I I I I 180 120 9'0 6'0 3' 0 150 120 9'0 do 3'0 0 CEA POSITION (INCHES WITHDRAWN)

Page 15 of 25

PVNGS UNIT 3 CORE OPERATING LIMITS REPORTReion1 Revision 12 FIGURE 3.1.7-2 CEA INSERTION LIMITS VERSUS THERMAL POWER (COLSS OUT OF SERVICE) 1.0 0.9 0.8 ..... .. ....

.......... ......... ... (SEE FOOTNO-T-E IN SEC-T-ION 31i7-FOR APPLICABILITY FOLLOWI:NG 0.7 .a . A REACTbR CUOTBACK w U... . . .. . . . . . . . . . . . . . .

0 0.6 .41... .... r ..........;---GRP ,4 P0S =(250.9--*FRA-C;PWR) *-9;82~--

on*zGRP 5POS (250.9JcFRAC.PNrR -818 LZ.

L~Z.

0.5 0.4 0

2 ...... ...

0.3 Ln 1 1 I .

0.2 0.1 0.0 I

GROUP I I 5I I I I GROUP I I 3 I' I I I GROUP I I I I I I I I I I I I I I I I I I I I I I I a I I I I 150 120 90 60 30 0 150 120 90 60 30 0 150 120 90 60 30 0 GROUP 4 GROUP 2 I I I I _ _ I I_ I I I I II II I~0 30~ 4o do0 3b 4 1~0 1~0 Y0o do go 6 CEA POSITION (INCHES WITHDRAWN)

Page 16 of 25

PVNGS UNIT 3 CORE OPERATING LIMITS REPORT Revision 1I1 FIGURE 3.1.8-1 PART LENGTH CEA INSERTION LIMITS VERSUS THERMAL POWER 0.0 .................................................

10.0

i. . . . . . .. . . . . .. i. . . . . . . i ... .. .i.. . . . .

20.0 30.0 ...... : ... ... ....... ...... .

i . ..... .... ....... .......... ..

40.0

'-'''''j!- -- ........................... ...............

i'RNIN i NETO LII i 7 0iNHS 50.0 Z

L) 60.0 z

70.0 z

0E 80.0 0

. .......... i.i.

In

¢ - . OPERATION -.-.. . .............-O.PERATION 90.0 .-.-.-. -

ULNACCEPTABLE R~ESTRICTED 100.0 z

H 110.0 _~~~~~~~~........... i...... r*i;.¢ ...... 9N..h.........i.r..ir LONG TERM STEADY STATE INSERTION:LIMITS (112.5 INCHES) 120.0 130.0 bPERATION ACCEPTABLE 140.0 _*....r

.^.. .. .. ........... ............. . ........ _ . -..

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 3 CORE OPERATING LIMITS REPORTReion1 Revision I 1 FIGURE 3.2.4-1 COLSS DNBR OPERATING LIMIT ALLOWANCE FOR BOTH CEAC's INOPERABLE 25 . . . . ... . . . . i.

... . . . . .~ J . . . . . 1U.

z0 (20,95.0) 20 r-15 0-

. 10 5

(0.075.0 I I . . . . . . . .

0 U-0 25 50 75 100 CORE POWER LEVEL

(% OF RATED THERMAL POWER)

Page 18 of 25

PVNGS UNIT 3 CORE OPERATING LIMITS REPORT Revision 11 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 LIeVEL

. MINIMUM OF 1.CEAC OkERABL 2.4 _ - - -- - 0O02,2.38) 01; 8

.3 :. _. . .

2.3 MINIMUM OF : OPE

.0 , ,03 z

2.2

. F. ,

- (-.1,196) . UNCCEPABL

- OPEATIO caE 2.1 .

. i :

1)t

. . ., .U

: : : :U

............ ACCEP ABLECOPERATION 1 11 1 1 2.0 PERA --- OP R ATIO N ... .................i .......

1.9

. a. . . ....

. .... ... .. LLL .

1 Q-. 2

-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 3 CORE OPERATING LIMITS REPORT Revision 11 FIGURE 3.2.4-3 DNBR MARGIN OPERATING LIMIT BASED ON THE CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, CEAC's INOPERABLE) 3.6 0

3.5 _ ...............................

ACCEPTABIIIE OPERATION I

ANY: POWER LEVEL CEAC's INOPERABIJE 3.4 ................ ..............

(0.1,3.32)

C) (.0,332) .............. .

3.3 ii z

V 3.2 _............... ................

.(-0.

UNACCEPTABLE 3.1 OPERATION

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

,a n

-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 11 PVNGS UNIT 3 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 onSCS ONA ONA ONA ONA Notes: SCS = Shutdown Cooling System ONA = Operation Not Allowed 0

Page 21 of 25

Revision 11 PVNGS UNIT 3 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 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 22 of 25

Revision 11 PVNGS UNIT 3 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 2 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 I hour 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 f.,

Page 23 of 25

Revision 11 PVNGS UNIT 3 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 2 Kefr> 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 I hour 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 11 PVNGS UNIT 3 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

ML042530164

Text

Dear Sirs:

Subject:

Enclosures:

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