DCL-09-056, Core Operating Limits Report

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Core Operating Limits Report
ML092230349
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 07/31/2009
From: Becker J
Pacific Gas & Electric Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
DCL-09-056, OL-DPR-80, OL-DPR-82
Download: ML092230349 (27)
v • d • e


Text

Pacific Gas and Electric Company-James R. Becker Diablo Canyon Power Plant Site Vice President Mail Code 104/5/601 P 0. Box 56 Avila Beach, CA 93424 805.545.3462 July 31,2009 Internal: 691.3462 Fax: 805.545.6445 PG&E Letter DCL-09-056 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Docket No. 50-275, OL-DPR-80 Docket No. 50-323, OL-DPR-82 Diablo Canyon Units 1 and 2 Core Operatinq Limits Report for Units 1 and 2

Dear Commissioners and Staff:

In accordance with Diablo Canyon Power Plant Technical Specification 5.6.5.d, enclosed are the Core Operating Limits Report (COLR) for Unit 1 and the COLR for Unit 2. These documents were revised for Unit.1 and Unit 2, Cycle 16 to include a reference to Technical Specification 3.1.8, Physics Tests Exceptions - Mode 2 (Startup).

There are no new or revised regulatory commitments in this submittal.

If there are any questions regarding the COLR, please contact Mr. Steve Hamilton at (805) 545-3449.

Sincer ly, James R. Be ker Z

dd m/2254/50255539 Enclosures cc:

Diablo Distribution cc/enc:

Elmo E. Collins, NRC Region IV Michael S. Peck, NRC Senior Resident Inspector Alan B. Wang, NRR Project Manager Aw m A member of the STARS (Strategic Teaming and Resource Sharing) Alliance CaLlaway e Comanche Peak

  • Diablo Canyon
  • Palo Verde e San Onofre e South Texas Project

DIABLO CANYON POWER PLANT UNIT 1, CYCLE 16, EFFECTIVE DATE JULY 2, 2009

      • ISSUED FOR USE BY:

PACIFIC GAS AND ELECTRIC COMPANY NUCLEAR POWER GENERATION DIABLO CANYON POWER PLANT CORE OPERATING LIMITS REPORT DATE:

EXPIRES:____

NUMBER COLR1 REVISION 2

PAGE 1 OF 12 UNIT TITLE:

COLR for Diablo Canyon Unit 1 1

07/02/09 EFFECTIVE DATE PROCEDURE CLASSIFICATION: QUALITY RELATED

1.

CORE OPERATING LIMITS REPORT 1.1 This Core Operating Limits Report (COLR) for Diablo Canyon Unit I Cycle 16 has been prepared in accordance with the requirements of Technical Specification (TS) 5.6.5.

1.2 The Technical Specifications affected by this report are listed below:

3.1.1 -

Shutdown Margin (MODE 2 with klf < 1.0, MODES 3, 4, and 5) 3.1.3 -

Moderator Temperature Coefficient 3.1.4 -

Rod Group Alignment Limits 3.1.5 -

Shutdown Bank Insertion Limits 3.1.6 -

Control Bank Insertion Limits 3.1.8 -

PHYSICS TESTING Exceptions-MODE 2 3.2.1 Heat Flux Hot Channel Factor - FQ(Z) 3.2.2 -

Nuclear Enthalpy Rise Hot Channel Factor - F NAH 3.2.3 3.4.1 Axial Flux Difference - (AFD)

RCS Pressure, Temperature, and Flow Departure from NucleateBoiling (DNB) Limits 3.9.1 Boron Concentration

2.

OPERATING LIMITS The cycle-specific parameter limits for the TS listed in Section 1 are presented in the following subsections. These limits have been developed using the NRC-approved methodologies specified in TS 5.6.5.

2.1 Shutdown Margin (SDM) (TS 3.1.1, 3.1.4, 3.1.5, 3.1.6, 3.1.8)

The SDM limit for MODE 1, MODE 2, MODE 3 and MODE 4 is:

2.1.1 The shutdown margin with Safety Injection enabled shall be greater than or equal to 1.6% Ak/k.

2.1.2 In Modes 3 or 4 the shutdown margin with Safety Injection blocked shall be greater than or equal to 1.6% Ak/k calculated at a temperature of 200'F.

The SDM limit for MODE 5 is:

2.1.3 The shutdown margin shall be greater than or equal to 1.0% Ak/k. However, an administrative value of 1.6 % Ak/k will be used to address concerns of NSAL-02-014.

COLR lulrO2.DOC 04B 0625.0849

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1 DIABLO CANYON POWER PLANT REVISION 2

PAGE 2 OF 12 TITLE:

COLR for Diablo Canyon Unit 1 UNIT 1

2.2 ModeratorTemperature Coefficient (MTC) (TS 3.1.3)

The MTC limit for MODES 1, 2, and 3 is:

2.2.1 The MTC shall be less negative than -3.9x10-4 Ak/k/°F for all rods withdrawn, end of cycle life (EOL), RATED THERMAL POWER condition.

2.2.2 The MTC 300 ppm surveillance limit is -3.Oxl 0-4 Ak/k/°F (all rods withdrawn, RATED THERMAL POWER condition).

2.2.3 The MTC 60 ppm surveillance limit is -3.72x104 Ak/k/°F (all rods withdrawn, RATED THERMAL POWER condition).

2.3 Shutdown Bank Insertion Limits (TS 3.1.5) 2.3.1 Each shutdown bank shall be withdrawn to at least 225 steps.

2.4 Control Bank Insertion Limits (TS 3.1.6) 2.4.1 The control banks shall be limited in physical insertion as shown in Figure 1.

2.5 Heat Flux Hot Channel Factor - FQ(Z) (TS 3.2.1)

F RTP 2.5.1 FQ(Z)<

  • K(Z) forP> 0.5 P

FRTP FQ (Z)<-

  • K(Z) for P_< 0.5 THERMAL POWER where: P =

RATED THERMAL POWER F RTP -2.58 Q

K(Z) = 1.0 NOTE: The W(Z) data is appropriate for use only if the predicted axial offset is within

+/-3% of the measured value.

2.5.2 The W(Z) data for Relaxed Axial Offset Control (RAOC) operation, provided in Tables 2A and 2B are sufficient to determine the RAOC W(Z) versus core height for Cycle 16 burnups through the end of full power reactivity plus a power coast down of up to 1000 MWD/MTU.

Table 1 shows FQ margin decreases that are greater than 2% per 31 Effective Full Power Days (EFPD). These values shall be used to increase F W (Z) per SR 3.2.1.2. A 2% penalty factor shall be used at all cycle bumups that are outside the range of Table 1.

COLR lulrO2.DOC 04B 0625.0849

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1 DIABLO CANYON POWER PLANT REVISION 2

PAGE 3 OF 12 TITLE:

COLR for Diablo Canyon Unit 1 UNIT 1

2.5.3 FQ(Z) shall be evaluated to determine if it is within its limits by verifying that F C (Z) and F W (Z) satisfy the following:

a.

Using the moveable incore detectors to obtain a power distribution map in MODE 1.

b.

Increasing the measured FQ(Z) component of the power distribution map by 3% to account for manufacturing tolerances and further increasing the value by 5% to account for measurement uncertainties.

c.

Satisfying the following relationship:

  • K(Z)

(FC (Z) < FQfor P > 0.5 Q

P c*

F*TP *K(Z)

F (Z)<

for P <.5 0.5 WRTP F

(Z) < Q *K(Z) for P > 0.5 Q

P F

RTP FQ(Z)*<

-*K(Z) forP* 0.5 where:

F C (Z) is the measured FQ(Z) increased by the allowances for manufacturing tolerances and measurement uncertainty.

F RTP is the FQ limit Q

K(Z) is the normalized FQ(Z) as a function of core height Pis the relative THERMAL POWER, and F W (Z) is the total peaking factor, F C (Z), multiplied by W(Z) which gives the maximum FQ(Z) calculated to occur in normal operation.

W(z) is the cycle dependent function that accounts for power distribution transients encountered during normal operation.

F RTP and K(Z) are specified in 2.5.1 and W(Z) is specified in 2.5.2.

Q COLRlulr02.DOC 04B 0625.0849

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1 DIABLO CANYON POWER PLANT REVISION 2 PAGE 4 OF 12 TITLE:

COLR for Diablo Canyon Unit 1 UNIT 1

2.6 Nuclear Enthalpy Rise Hot Channel Factor - FNH (TS 3.2.2)

F N

_<FRTP *[I+ PF

  • (1-P)]

aH -AH where:

THERMAL POWER RATED THERMAL POWER F N

= Measured values of F N obtained by using the moveable incore detectors to AH AH obtain a power distribution map.

F RTP

= 1.59 (includes the 4% measurement uncertainty)

AH PFAH

= 0.3 = Power Factor Multiplier 2.7 Power Distribution Measurement Uncertainty (TS 3.2.1. and TS 3.2.2):

If the Power Distribution Monitoring System (PDMS) is OPERABLE, the uncertainty, FN UFAH, to be applied to the Nuclear Enthalpy Rise Hot Channel Factor, F AH, shall be calculated by the following formula:

U 1 =1.0+/- UAH 100.0 where:

UA = Uncertainty for enthalpy rise as defined in equation (5-19) in Reference 6.2 and F RTP = 1.65 for PDMS (in the above Section 2.6 AH equation).

If the PDMS is OPERABLE, the uncertainty, UFQ, to be applied to the Heat Flux Hot Channel Factor, FQ(z), shall be calculated by the following formula:

U0 UF~O 0+ UQ U,2Q.0100.0),*U where:

UQ = Uncertainty for power peaking factor as defined in equation (5-19) in Reference 6.2.

Ue = Engineering uncertainty factor

= 1.03 If the PDMS is inoperable, the Nuclear Enthalpy Rise Hot Channel Factor, F AHN shall be calculated as specified in Section 2.6.

If the PDMS is inoperable, the Heat Flux Hot Channel Factor, FQ(Z), shall be calculated as specified in Section 2.5.

COLR lulrO2.DOC 04B 0625.0849

PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:

COLR for Diablo Canyon Unit 1 NUMBER REVISION PAGE UNIT COLR 1 2

5 OF 12 1

2.8 Axial Flux Difference (TS 3.2.3) 2.8.1 The Axial Flux Difference (AFD) Limits are provided in Figure 2.

2.9 Boron Concentration (TS 3.9.1)

The refueling boron concentration of the Reactor Coolant System, the refueling canal, and the refueling cavity shall be maintained within the more restrictive of the following limits:

2.9.1 A kelr of 0.95 or less, with the most reactive control rod assembly completely withdrawn, or 2.9.2 A boron concentration of greater than or equal to 2000 ppm.

2.10 RCS Pressure and Temperature Departure from Nucleate Boiling (DNB) Limit (TS 3.4.1) 2.10.1 Pressurizer pressure is greater than or equal to 2175 psig.

2.10.2 RCS average temperature is less than or equal to 581.7°F.

NOTE: The DNBR RCS TAVG limit is based on the slightly lower and bounding value associated with Unit 1 in order to have the same surveillance limits for both Unit 1 and Unit 2.

3.

TABLES 3.1 Table 1, "FQ Margin Decreases in Excess of 2% Per 31 EFPD" 3.2 Table 2A, "Load Follow W(Z) Factors at 150 and 4,000 MWD/MTU as a Function of Core Height" 3.3 Table 2B, "Load Follow W(Z) Factors at 12,000 and 20,000 MWD/MTU as a Function of Core Height"

4.

FIGURES 4.1 Figure 1, "Control Bank Insertion Limits Versus Rated Thermal Power" 4.2 Figure 2, "APD Limits as a Function ot Kated Tlhermal Power"

5.

RECORDS None

6.

REFERENCES 6.1 "Diablo Canyon Unit 1 Cycle 16 Final Reload Evaluation," December, 2008 6.2 WCAP-12473-A (Non-Proprietary), "BEACON Core Monitoring and Operations Support System," August, 1994 COLR lulr02.DOC 04B 0625.0849

PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:

COLR for Diablo Canyon Unit 1 NUMBER COLR 1 REVISION 2

PAGE 6 OF 12 UNIT 1

Table 1: FQ Margin Decreases in Excess of 2% Per 31 EFPD Cycle Max. % Decrease Bumup in FQ Margin (MWD/MTU) 0 2.01 150 2.01.

313 2.33 475 2.57 638 2.69 801 2.64 963 2.41 1126 2.06 1288 2.00 4866 2.00 5029 2.48 5191 2.93 5354 3.39 5517 3.85 5679 4.26 5842 4.55 6005 4.30 6167 4.05 6330 3.80 6493 3.52 6655 3.24 6818 2.96 6980 2.66 7143 2.37 7306 2.07 7468 2.00 18527 2.00 18690 2.03 18852 2.00 NOTE: All cycle bumups outside the range of this table shall use a 2% decrease in FQ margin for compliance with SR 3.2.1.2. Linear interpolation is adequate for intermediate cycle bumups.

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PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:

COLR for Diablo Canyon Unit 1 NUMBER COLR1 REVISION 2

PAGE 7 OF 12 UNIT 1

Table 2A: Load Follow W(Z) Factors at 150 and 4000 MWD/MTU as a Function of Core Height HEIGHT (FEET)

  • 0.0000
  • 0.2000
  • 0.4000
  • 0.6000
  • 0.8000 1.0000 1.2000 1.4000 1.6000 1.8000 2.0000 2.2000 2.4000 2.6000 2.8000 3.0000 3.2000 3.4000 3.6000 3.8000 4.0000 4.2000 4.4000 4.6000 4.8000 5.o0oo 5.2000 5.4000 5.6000 5.8000 150 MWD/MTU W(Z) 1.5977 1.5923 1.5834 1.5722 1.5587 1.5424 1.5234 1.5023 1.4795 1.4553 1.4299 1.4035 1.3765 1.3490 1.3191 1.2987 1.2891 1.2813 1.2755 1.2687 1.2603 1.2508 1.2401 1.2283 1.2155 1.2019 1.1876 1.1726 1.1585 1.1557 HEIGHT (FEET)
  • 0.0000
  • 0.2000
  • 0.4000
  • 0.6000
  • 0.8000 1.0000 1.2000 1.4000 1.6000 1.8000 2.0000 2.2000 2.4000 2.6000 2.8000 3.0000 3.2000 3.4000 3.6000 3.8000 4.0000 4.2000 4.4000 4.6000 4.8000 5.0000 5.2000 5.4000 5.6000 5.8000 4000 MWD/MTU W(Z) 1.5792 1.5745 1.5659 1.5548 1.5410 1.5242 1.5043 1.4820 1.4576 1.4315 1.4040 1.3755 1.3463 1.3166 1.2889 1.2674 1.2535 1.2438 1.2342 1.2282 1.2229 1.2158 1.2078 1.1988 1.1889 1.1781 1.1668 1.1546 1.1411 1.1368
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PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:

COLR for Diablo Canyon Unit 1 NUMBER COLR1 REVISION 2

PAGE 8 OF 12 UNIT 1

Table 2A: Load Follow W(Z) Factors at 150 and 4000 MWD/MTU as a Function of Core Height (Continued)

HEIGHT (FEET) 6.0000 6.2000 6.4000 6.6000 6.8000 7.0000 7.2000 7.4000 7.6000 7.8000 8.0000 8.2000 8.4000 8.6000 8.8000 9.0000 9.2000 9.4000 9.6000 9.8000 10,.0000 10.2000 10.4000 10.6000 10.8000 11.0000 "11.2000 "11.4000 "11.6000

  • 11.8000
  • 12.0000 150 MWDiMTU W(Z) 1.1581 1.1643 1.1693 1.1731 1.1758 1.1770 1.1768 1.1753 1.1719 1.1665 1.1590 1.1491 1.1368 1.1254 1.1131 1.1097 1.1164 1.1370 1.1654 1.1942 1.2207 1.2464 1.2707 1.2928 1.3122 1.3283 1.3425 1.3582 1.3736 1.3882 1.4024 HEIGHT (FEET) 6.0000 6.2000 6.4000 6.6000 6.8000 7.0000 7.2000 7.4000 7.6000 7.8000 8.0000 8.2000 8.4000 8.6000 8.8000 9.0000 9.2000 9.4000 9.6000 9.8000 10.0000 10.2000 10.4000 10.6000 10.8000 11.0000 "11.2000 "11.4000
  • 11.6000
  • 11.8000
  • 12.0000 4000 MWD/MTU W(Z) 1.1394 1.1508 1.1608 1.1697 1.1775 1.1838 1.1886 1.1915 1.1924 1.1912 1.1876 1.1817 1.1732 1.1603 1.1545 1.1512 1.1504 1.1709 1.1932 1.2135 1.2300 1.2400 1.2479 1.2581 1.2672 1.2761 1.2873 1.2948 1.2980 1.2974 1.2977
  • Top and Bottom 8% Excluded COLR lulr02.DOC 04B 0625.0849

PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:

COLR for Diablo Canyon Unit 1 NUMBER COLR 1 REVISION 2

PAGE 9 OF 12 UNIT

.1 Table 2B: Load Follow W(Z) Factors at 12000 and 20000 MWD/MTU as a Function of Core Height HEIGHT (FEET)

  • 0.0000
  • 0.2000
  • 0.4000
  • 0.6000
  • 0.8000 1.0000 1.2000 1.4000 1.6000 1.8000 2.0000 2.2000 2.4000 2.6000 2.8000 3.0000 3.2000 3.4000 3.6000 3.8000 4.0000 4.2000 4.4000 4.6000 4.8000 5.0000 5.2000 5.4000 5.6000' 5.8000 12000 MWD/MTU W(Z) 1.2730 1.2651 1.2556 1.2450 1.2337 1.2203 1.2058 1.1931 1.1841 1.1752 1.1659 1.1566 1.1475 1.1385 1.1278 1.1253 1.1298 1.1321 1.1360 1.1434 1.1515 1.1581 1.1638 1.1684 1.1716 1.1742 1.1748 1.1747 1.1875 1.2063 HEIGHT (FEET)
  • 0.0000
  • 0.2000
  • 0.4000
  • 0.6000
  • 0.8000 1.0000 1.2000 1.4000 1.6000 1.8000 2.0000 2.2000 2.4000 2.6000 2.8000 3.0000 3.2000 3.4000 3.6000 3.8000 4.0000 4.2000 4.4000 4.6000 4.8000 5.0000 5.2000 5.4000 5.6000 5.8000 20000 MWDiMTU W(Z) 1.3639 1.3510 1.3365 1.3213 1.3057 1.2876 1.2709 1.2582 1.2447 1.2311 1.2176 1.2039 1.1903 1.1765 1.1619 1.1587 1.1620 1.1694

-1.1779 1.1889 1.1996 1.2083

.1.2171 1.2265 1.2349 1.2383 1.2467 1.2716 1.2936 1.3124

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PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:

COLR for Diablo Canyon Unit 1 NUMBER COLR 1 REVISION 2

PAGE 10 OF 12 UNIT I

Table 2B: Load Follow W(Z) Factors at 12000 and 20000 MWD/MTU as a Function of Core Height (continued)

HEIGHT (FEET) 6.0000 6.2000 6.4000 6.6000 6.8000 7.0000 7.2000 7.4000 7.6000 7.8000 8.0000 8.2000 8.4000 8.6000 8.8000 9.0000 9.2000 9.4000 9.6000 9.8000 10.0000 10.2000 10.4000 10.6000 10.8000 11.0000 "11.2000 "11.4000

  • 11.6000
  • 11.8000
  • 12.0000 12000 MWD/MTU W(Z) 1.2245 1.2409 1.2555 1.2682 1.2786 1.2870 1.2932 1.2968 1.2974 1.2949 1.2893 1.2802 1.2678 1.2561 1.2571 1.2737 1.2971 1.3178 1.3368 1.3549 1.3723 1.3882 1.4011 1.4095 1.4198 1.4324 1.4423 1.4489 1.4475 1.4378 1.4300 HEIGHT (FEET) 6.0000 6.2000 6.4000 6.6000 6.8000 7.0000 7.2000 7.4000 7.6000 7.8000 8.0000 8.2000 8.4000 8.6000 8.8000 9.0000 9.2000 9.4000 9.6000 9.8000 10.0000 10.2000 10.4000 10.6000 10.8000 11.0000 "11.2000 "11.4000 "11.6000
  • 11.8000
  • 12.0000 20000 MWD/MTU W(Z) 1.3292 1.3431 1.3542 1.3624 1.3673 1.3693 1.3682 1.3634 1.3548 1.3423 1.3257 1.3052 1.2808 1.2539 1.2466 1.2450 1.2397 1.2365 1.2268

,1.2316 1.2519 1.2719 1.2906 1.3080 1.3247 1.3407 1.3555 1.3682 1.3730 1.3694 1.3678

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04B 0625.0849

PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:

COLR for Diablo Canyon Unit 1 NUMBER REVISION PAGE COLR 1 2

11 OF 12 1

UNIT

~0 a-a)

Ccc M6 225 200 175 150 125 100 75 68 (0. 17,225)

-(0.68,225)

-I---

.L....

j a---------

10 77)-

T------I---

(0.0,1-3) i-i I-I

- - I-H-...........-.....

+-

1-.

I

-I I

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-4 III-

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- -q T- -----

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I 0-55)--/-------------------4-----

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-~~~ -

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--S-I-

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Valid for Fully----

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BAN D I I

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I I-/

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-. 4.

L-1(.2...0)..

Poi Io s >225 Step And. 23 Steps---

II I

i I I I

4 I

50 25 0

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Fraction of Rated Thermal Power Figure 1: Control Bank Insertion Limits Versus Rated Thermal Power COLR lulr02.DOC 04B 0625.0849

PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:

COLR for Diablo Canyon Unit 1 NUMBER COLR1 REVISION 2

PAGE 12 OF 12 UNIT 1

120 100 80 0

a.

7-E) 60 40 20 0 50

-40

-30

-20

-10 0

10 20 30 40 50 60 Flux Difference (DELTA I) %

Figure 2: AFD Limits as a Function of Rated Thermal Power COLR lulrO2.DOC 04B 0625.0849 PG&E Letter DCL-09-056 CORE OPERATING LIMITS REPORT (COLR)

DIABLO CANYON POWER PLANT UNIT 2, CYCLE 16, EFFECTIVE DATE JULY 2, 2009

      • ISSUED FOR USE BY:__

PACIFIC GAS AND ELECTRIC COMPANY NUCLEAR POWER GENERATION DIABLO CANYON POWER PLANT CORE OPERATING LIMITS REPORT DATE:

EXPIRES:____

NUMBER COLR 2 REVISION 3

PAGE 1 OF 12 UNIT TITLE:

COLR for Diablo Canyon Unit 2 2

07/02/09 EFFECTIVE DATE PROCEDURE CLASSIFICATION: QUALITY RELATED

1.

CORE OPERATING LIMITS REPORT 1.1 This Core Operating Limits Report (COLR) for Diablo Canyon Unit 2 Cycle 15 has been prepared in accordance with the requirements of Technical Specification (TS) 5.6.5.

1.2 The Technical Specifications affected by this report are listed below:

3.1.1 Shutdown Margin (MODE 2 with kff < 1.0, MODES 3, 4, and 5) 3.1.3 -

Moderator Temperature Coefficient 3.1.4 -

Rod Group Alignment Limits 3.1.5 -

Shutdown Bank Insertion Limits 3.1.6 -

Control Bank Insertion Limits 3.1.8 -

PHYSICS TESTING Exceptions - MODE 2 3.2.1 -

Heat Flux Hot Channel Factor - FQ(Z) 3.2.2 -

Nuclear Enthalpy Rise Hot Channel Factor - F N AHt

  • 3.2.3
  • 3.4.1 Axial Flux Difference - (AFD)

RCS Pressure, Temperature, and Flow Departure from Nucleate Boiling (DNB) Limits 3.9.1 -

Boron Concentration

2.

OPERATING LIMITS The cycle-specific parameter limits for the TS listed in Section 1 are presented in the following subsections. These limits have been developed using the NRC-approved methodologies specified in TS 5.6.5.

2.1 Shutdown Margin (SDM) (TS 3.1.1, 3.1.4, 3.1.5, 3.1.6, 3.1.8)

The SDM limit for MODE 1, MODE 2, MODE 3 and MODE 4 is:

2.1.1 The shutdown margin with Safety Injection enabled shall be greater than or equal to 1.6% Ak/k.

2.1.2 In Modes 3 or 4 the shutdown margin with Safety Injection blocked shall be greater than or equal to 1.6% AkMk calculated at a temperature of 200'F.

The SDM limit for MODE 5 is:

2.1.3 The shutdown margin shall be greater than or equal to 1.0% Ak/k. However, an administrative value of 1.6 % Ak/k will be used to address concerns of NSAL-02-014.

COLR 2u2r03.DOC 04B 0625.0851

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 3 PAGE 2 OF 12 TITLE:

COLR for Diablo Canyon Unit 2 UNIT 2

2.2 Moderator Temperature Coefficient (MTC) (TS 3.1.3)

The MTC limit for MODES 1, 2, and 3 is:

2.2.1 The MTC shall be less negative than -3.9x 10-4 Ak/k/°F for all rods withdrawn, end of cycle life (EOL), RATED THERMAL POWER condition.

2.2.2 The MTC 300 ppm surveillance limit is -3.OxlO-4 Ak/k/°F (all rods withdrawn, RATED THERMAL POWER condition).

2.2*.3 The MTC 60 ppm surveillance limit is -3.72xl0-4 Ak/k/°F (all rods withdrawn, RATED'THERMAL POWER condition).

2.3 Shutdown Bank Insertion Limits (TS 3.1.5) 2.3.1 Each shutdown bank shall be withdrawn to at least 225 steps.

2.4 Control Bank Insertion Limits (TS 3.1.6) 2.4.1 The control banks shall be limited in physical insertion as shown in Figure 1.

2.5 Heat Flux Hot Channel Factor - FQ(Z) (TS 3.2.1)

F RFTP 2.5.1 FQ (Z)< Q *K(Z) for P > 0.5 P

FT FQ(Z)<Q---.*K(Z) forP*< 0.5 THERMAL POWER where: P = RATED THERMAL POWER F RTP = 2.58 Q

K(Z) = 1.0 NOTE: The W(Z) data is appropriate for use only if the predicted axial offset is within

+/-3% of the measured value.

2.5.2 The W(Z) data for Relaxed Axial Offset Control (RAOC) operation, provided in Tables 2A and 2B are sufficient to determine the RAOC W(Z) versus core height for Cycle 15 burnups through the end of full power reactivity plus a power coast down of up to 1000 MWD/MTU.

Table 1 shows FQ margin decreases that are greater than 2% per 31 Effective Full Power Days (EFPD). These values shall be used to increase F W (Z) per SR 3.2.1.2. A 2% penalty factor shall be used at all cycle burnups that are outside the range of Table 1.

COLR 2uMiI~3DOC 04B 06501 0625.0851

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION? 3 PAGE 3 OF 12 TITLE:

COLR for Diablo Canyon Unit 2 UNIT 2

2.5.3 FQ(Z) shall be evaluated to determine if it is within its limits by verifying that F C (Z) and F W (Z) satisfy the following:

a.

Using the moveable incore detectors to obtain a power distribution map in MODE 1.

b.

Increasing the measured FQ(Z) component of the power distribution map by 3% to account for manufacturing tolerances and further increasing the value by 5% to account for measurement uncertainties.

c.

Satisfying the following relationship:

(c FRTP *K(Z)

F (Z) <

for P > 0.5 Q

P FRTP *K(Z)

F (Z) <

for P_ 0.5 0.5 WRTP F

(Z) <

'Q

  • K(Z) for P > 0.5 Q

P F

Q()

RTP Q(.5 *K(Z) for P*_< 0.5 Q 0.5 where:

F C (Z) is the measured FQ(Z) increased by the allowances for manufacturing tolerances and measurement uncertainty.

F RTP is the FQ limit Q

F K(Z) is the normalized FQ(Z) as a function of core height P is the relative THERMAL POWER, and F W (Z) is the total peaking factor, FC (Z), multiplied by W(Z) which gives the maximum FQ(Z) calculated to occur in normal operation.

W(z) is the cycle dependent function that accounts for power distribution transients encountered during normal operation.

F RTP and K(Z) are specified in 2.5.1 and W(Z) is specified in 2.5.2.

Q COLR_2u2r03.DOC 04B 0625.0851

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 3

PAGE 4 OF 12 TITLE:

COLR for Diablo Canyon Unit 2 UNIT 2

2.6 Nuclear Enthalpy Rise Hot Channel Factor - FAH (S 3.2.2)

FN

< FRTP *[1 + PFA * (1P)]

AH-AH(-

where:

THERMAL POWER P

=

RATED THERMAL POWER F N

= Measured values of F N obtained by using the moveable incore detectors to AH AH obtain a power distribution map.

F RTP

= 1.59 (includes the 4% measurement uncertainty)

AH PFAH

= 0.3 = Power Factor Multiplier 2.7 Power Distribution Measurement Uncertainty (TS 3.2.1. and TS 3.2.2):

If the Power Distribution Monitoring System (PDMS) is OPERABLE, the uncertainty, UFAH, to be applied to the Nuclear Enthalpy Rise Hot Channel Factor, F NH, shall be calculated by the following formula:

UFA =1.0-+ UAH 100.0 where:

UAH = Uncertainty for enthalpy rise as defined in equation (5-19) in Reference 6.2 and F RTP = 1.65 for PDMS (in the above Section 2.6 AH equation).

If the PDMS is OPERABLE, the uncertainty, UFQ, to be applied to the Heat Flux Hot Channel Factor, FQ(z), shall be calculated by the following formula:

UQ 1.0+10.

1QJ*Ue where:

UQ = Uncertainty for power peaking factor as defined in equation (5-19) in Reference 6.2.

Ue = Engineering uncertainty factor

= 1.03 If the PDMS is inoperable, the Nuclear Enthalpy Rise Hot Channel Factor, FNH, shall be calculated as specified in Section 2.6..

If the PDMS is inoperable, the Heat Flux Hot Channel Factor, FQ(Z), shall be calculated as specified in Section 2.5.

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COLR for Diablo Canyon Unit 2 NUMBER REVISION PAGE UNIT COLR 2 3

5 OF 12 2

2.8 Axial Flux Difference (TS 3.2.3) 2.8.1 The Axial Flux Difference (AFD) Limits are provided in Figure 2.

2.9 Boron Concentration (TS 3.9.1)

The refueling boron concentration of the Reactor Coolant System, the refueling canal, and the refueling cavity shall be maintained within the more restrictive of the following limits:

2.9.1 A kff of 0.95 or less, with the most reactive control rod assembly completely withdrawn, or 2.9.2 A boron concentration of greater than or equal to 2000 ppm.

2.10 RCS Pressure and Temperature Departure from Nucleate Boiling (DNB) Limit (TS 3.4.1) 2.10.1 Pressurizer pressure is greater than or equal to 2175 psig.

2.10.2 RCS average temperature is less than or equal to 581.7°F.

NOTE: The DNBR RCS TAVO limit is based on the slightly lower and bounding value associated with Unit 1 in order to have the same surveillance limits for both Unit 1 and Unit 2.

3.

TABLES 3.1 3.2 3.3

4.

FIGURES 4.1 Table 1, "FQ Margin Decreases in Excess of 2% Per 31 EFPD" Table 2A, "Load Follow W(Z) Factors at 150 and 4,000 MWD/MTU as a Function'of Core Height" Table 2B, "Load Follow W(Z) Factors at 12,000 and 20,000 MWD/MTU as a Function of Core Height" Figure 1, "Control Bank Insertion Limits Versus Rated Thermal Power" 4.2 Figure 2, "All) Limits as a Function of Ratecd Thlermal Power"

5.

RECORDS None

6.

REFERENCES 6.1 NF-PGE-08-26, "Diablo Canyon Unit 2 Cycle 15 Reload Evaluation and COLR, Revision 1," March, 2008 6.2 WCAP-12473-A (Non-Proprietary), "BEACON Core Monitoring and Operations Support System," August, 1994 COLR 2u2r03.DOC 04B 0625.0851

PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:

COLR for Diablo Canyon Unit 2 NUMBER COLR 2 REVISION 3

PAGE 6 OF 12 UNIT 2

Table 1: FQ Margin Decreases in Excess of 2% Per 31 EFPD

'Cycle Max. % Decrease Bumup in FQ Margin (MWD/MTU) 150 2.00 312 2.22 475 2.80 637 3.28 799 3.58 962 3.73 1124 3.72 1286 3.56 1449 3.30 1611 2.94 1773 2.56 1935 2.16 2098 2.00 5506 2.00 5669 2.18 5831 2.53 5993 2.83 6156 3.14 6318 3.36 6480 3.24 6643 3.00 6805 2.72 6967 2.44 7130 2.14 7292 2.00 NOTE: All cycle burnups outside the range of this table shall use a 2% decrease in FQ margin for compliance with SR 3.2.1.2. Linear interpolation is adequate for intermediate cycle burnups.

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COLR for Diablo Canyon Unit 2 NUMBER COLR2 REVISION 3 PAGE 7 OF 12 UNIT 2

Table 2A: Load Follow W(Z) Factors at 150 and 4000 MWD/MTU as a Function of Core Height HEIGHT (FEET)

  • 0.0000
  • 0.2000
  • 0.4000
  • 0.6000
  • 0.8000 1.0000 1.2000 1.4000 1.6000 1.8000 2.0000 2.2000 2.4000 2.6000 2.8000 3.0000 3.2000 3.4000 3.6000 3.8000 4.0000 4.2000 4.4000 4.6000 4.8000 5.0000 5.2000 5.4000 5.6000 5.8000 150 MWD/MTU W(Z) 1.6042 1.5982 1.5885 1.5765 1.5621 1.5448 1.5246 1.5023 1.4781 1.4525 1.4257 1.3977 1.3691 1.3399 1.3092 1.2844 1.2705 1.2626 1.2528 1.2430 1.2356 1.2291 1.2209 1.2118 1.2017 1.1907 1.1791 1.1667 1.1545 1.1594 HEIGHT (FEET)
  • 0.0000
  • 0.2000
  • 0.4000
  • 0.6000
  • 0.8000 1.0000 1.2000 1.4000 1.6000 1.8000 2.0000 2.2000 2.4000 2.6000 2.8000 3.0000 3.2000 3.4000 3.6000 3.8000 4.0000 4.2000 4.4000 4.6000 4.8000 5.0000 5.2000 5.4000 5.6000 5.8000 4000 MWD/MTU W(Z) 1.5297 1.5219 1.5117 1.5001 1.4871 1.4716 1.4532 1.4326 1.4101 1.3862 1.3612 1.3349 1.3088 1.2864 1.2637 1.2433 1.2286 1.2198 1.2154 1.2111 1.2056 1.1991 1.1916 1.1832 1.1739 1.1636 1.1531 1.1425 1.1316 1.1319
  • Top and Bottom 8% excluded COLR_2u2r03.DOC 04B 0625.0851

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COLR for Diablo Canyon Unit 2 NUMBER COLR2 REVISION 3 PAGE 8 OF 12 UNIT 2

TABLE 2A: Load Follow W(Z) Factors at 150 and 4000 MWD/MTU as a Function of Core Height (Continued)

HEIGHT (FEET) 6.0000 6.2000 6.4000 6.6000 6.8000 7.0000 7.2000 7.4000 7.6000 7.8000 8.0000 8.2000 8.4000 8.6000 8.8000 9.0000 9.2000 9.4000 9.6000 9.8000 10.0000 10.2000 10.4000 10.6000 10.8000 11.0000

  • 11.2000
  • 11.4000
  • 11.6000
  • 11.8000
  • 12.0000 150 MWD/MTU W(Z) 1.1720 1.1805 1.1886 1.1954 1.2008 1.2047 1.2069 1.2073 1.2056 1.2017 1.1955 1.1869 1.1758 1.1622 1.1460 1.1280 1.1136 1.1094 1.1075 1.1057 1.1057 1.1090 1.1153 1.1212 1.1267 1.1312 1.1370 1.1462 1.1469 1.1407 1.1345 HEIGHT (FEET) 6.0000 6.2000 6.4000 6.6000 6.8000 7.0000 7.2000 7.4000 7.6000 7.8000 8.0000 8.2000 8.4000 8.6000 8.8000 9.0000 9.2000 9.4000 9.6000 9.8000 10.0000 10.2000 10.4000 10.6000' 10.8000 11.0000
  • 11.2000
  • 11.4000
  • 11.6000
  • 11.8000
  • 12.0000 4000 MWD/MTU W(Z) 1.1405 1.1495 1.1575 1.1645 1.1703 1.1750 1.1781 1.1798 1.1805 1.1797 1.1768 1.1721 1.1654 1.1553 1.1521 1.1527 1.1556 1.1588 1.1637 1.1704 1.1794 1.1897 1.1991 1.2076 1.2155 1.2213 1.2274 1.2371 1.2373 1.2317 1.2261 Top, and Bottom 8% excluded COLR_2u2r03.DOC 04B 0625.0851

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COLR for Diablo Canyon Unit 2 NUMBER REVISION PAGE COLR 2 3

9 OF 12 2

UNIT Table 2B: *Load Follow W(Z) Factors at 12000 and 20000 MWD/MTU as a Function of Core Height HEIGHT (FEET)

  • 0.0000
  • 0.2000
  • 0.4000
  • 0.6000
  • 0.8000 1.0000 1.2000 1.4000 1.6000 1.8000 2.0000 2.2000 2.4000 2.6000 2.8000 3.0000 3.2000 3.4000 3.6000 3.8000 4.0000 4.2000 4.4000 4.6000 4.8000 5.0000 5.2000 5.4000 5.6000 5.8000 12000 MWD/MTU W(Z) 1.2124 1.2155 1.2153 1.2129 1.2083 1.2015 1.1933 1.1844 1.1753 1.1674 1.1608 1.1548 1.1489 1.1431 1.1374 1.1311 1.1273 1.1272 1.1323 1.1372 1.1403 1.1438 1.1491 1.1536 1.1568 1.1594 1.1603 1.1606 1.1715 1.1907 HEIGHT (FEET)
  • 0.0000
  • 0.2000
  • 0.4000
  • 0.6000
  • 0.8000 1.0000 1.2000 1.4000 1.6000 1.8000 2.0000 2.2000 2.4000 2.6000 2.8000 3.0000 3.2000 3.4000 3.6000 3.8000 4.0000 4.2000 4.4000 4.6000 4.8000 5.0000 5.2000 5.4000 5.6000 5.8000 20000 MWD/MTU W(Z) 1.2866 1.2872 1.2840 1.2783 1.2699 1.2589 1.2462 1.2329 1.2194 1.2059 1.1920 1.1792 1.1702 1.1653 1.1608 1.1555 1.1566 1.1678 1.1783 1.1874 1.1947 1.2019 1.2110 1.2178 1.2225 1.2259 1.2264 1.2263 1.2357 1.2484
  • Top and Bottom 8% excluded COLR 2uI3.DOC 04B 0625.0851

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COLR for Diablo Canyon Unit 2 NUMBER COLR 2 REVISION 3

PAGE 10 OF 12 UNIT 2

Table 2B: Load Follow W(Z) Factors at 12000 and 20000 MWD/MTU as a Function of Core Height (Continued)

HEIGHT (FEET) 6.0000 6.2000 6.4000 6.6000 6.8000 7.0000 7.2000 7.4000 7.6000 7.8000 8.0000 8.2000 8.4000 8.6000 8.8000 9.0000 9.2000 9.4000 9.6000 9.8000 10.0000 10.2000 10.4000 10.6000 10.8000 11.0000

  • 11.2000
  • 11.4000
  • 11.6000
  • 11.8000
  • 12.0000 12000 MWD/MTU W(Z) 1.2109 1.2290 1.2456 1.2605 1.2734 1.2842 1.2927 1.2986 1.3017 1.3020 1.2993 1.2937 1.2850 1.2720 1.2637 1.2614 1.2600 1.2582 1.2547 1.2544 1.2578 1.2662 1.2726 1.2903 1.3088 1.3217 1.3312 1.3340 1.3285 1.3069 1.2854 HEIGHT (FEET) 6.0000 6.2000 6.4000 6.6000 6.8000 7.0000 7.2000 7.4000 7.6000 7.8000 8.0000 8.2000 8.4000 8.6000 8.8000 9.0000 9.2000 9.4000 9.6000 9.8000 10.0000 10.2000 10.4000 10.6000 10.8000 11.0000
  • 11.2000
  • 11.4000
  • 11.6000
  • 11.8000
  • 12.0000 20000 MWD/MTU W(Z) 1.2595 1.2688 1.2761 1.2814 1.2844 1.2852 1.2841 1.2808 1.2747 1.2657 1.2539 1.2390 1.2212 1.2058 1.2035 1.2077 1.2070 1.2049 1.2085 1.2159 1.2234 1.2298 1.2350 1.2544 1.2773 1.2966 1.3145 1.3265 1.3265 1.3105 1.2944
  • Top and Bottom 8% excluded COLR 2u2r03.DOC 04B 0625.0851

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COLR for Diablo Canyon Unit 2 NUMBER COLR 2 REVISION 3 PAGE 11 OF 12 UNIT 2

(U 0) 4aI 0

0 Im 225 200 175 150 125 100 75 50 25 0

I 0.0 0.1 0.2 0.3

,0.4 0.5 0.6 0.7 0.8 0.9 1.0 Fraction of Rated Thermal Power Figure 1: Control Bank Insertion Limits Versus Rated Thermal Power COLR 2u2r03.DOC 04B 0625.0851

PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:

COLR for Diablo Canyon Unit 2 NUMBER COLR 2 REVISION 3 PAGE 12 OF 12 UNIT 2

120 100 80 I,-

0 0.

I-

"o 60 40 20 0

-60

-50

-40

-30

-20

-10 0

10 20 30 40 50 60 Flux Difference (DELTA I) %

Figure 2: AFD Limits as a Function of Rated Thermal Power COLR 2u2r03.DOC 04B 0625.0851

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