DCL-02-062, Core Operating Limits Report, Cycle 12

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Core Operating Limits Report, Cycle 12
ML021550459
Person / Time
Site: Diablo Canyon Pacific Gas & Electric icon.png
Issue date: 05/17/2002
From: Oatley D
Pacific Gas & Electric Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
DCL-02-062, OL-DPR-80
Download: ML021550459 (18)
v • d • e


Text

PacificGas and ElectricCompany David H.Oatley Diablo Canyon Power Plant Vice President PO. Box 56 Diablo Canyon Operations Avila Beach, CA 93424 May 17, 2002 805.545.4350 Fax: 805.545.4234 PG&E Letter DCL-02-062 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Docket No. 50-275, OL-DPR-80 Diablo Canyon Unit 1 Core Operating Limits Report Unit 1. Cycle 12

Dear Commissioners and Staff:

In accordance with Diablo Canyon Power Plant Technical Specification 5.6.5.d, enclosed is the Core Operating Limits Report for Unit 1, Cycle 12.

Sincerely, Qcc4 David H. Oatley ddm/2254 Enclosure cclenc: Edgar Bailey, DHS William B. Jones Ellis W. Merschoff David L. Proulx Girija S. Shukta cc: Diablo Distribution A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Cattaway

  • Comanche Peak a Diablo Canyon
  • Pato Verde
  • South Texas Project a Wolf Creek r-V110

Enclosure PG&E Letter DCL-02-062 CORE OPERATING LIMITS REPORT (COLR)

DIABLO CANYON POWER PLANT UNIT 1, CYCLE 12, REVISION 0 (16 Pages)

EFFECTIVE DATE MAY 10, 2002

      • ISSUED FOR USE BY: DATE: EXPIRES: ***

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 NUCLEAR POWER GENERATION REVISION 0 DIABLO CANYON POWER PLANT PAGE 1 OF 16 CORE OPERATING LIMITS REPORT UNIT TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 1

05/10/02 EFFECTIVE DATE PROCEDURE CLASSIFICATION: QUALITY RELATED

1. CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for Diablo Canyon Unit 1 Cycle 12 has been prepared in accordance with the requirements of Technical Specification (TS) 5.6.5.

The Technical Specifications affected by this report are listed below:

3.1.1 - Shutdown Margin (MODE 2 with keff < 1.0, MODES 3, 4, and 5) 3.1.3 - Moderator Temperature Coefficient 3.1.5 - Shutdown Bank Insertion Limits 3.1.6 - Control Bank Insertion Limits 3.2.1 - Heat Flux Hot Channel Factor - FQ(Z) 3.2.2 - Nuclear Enthalpy Rise Hot Channel Factor - FHN 3.2.3 - Axial Flux Difference - (AFD) 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)

The SDM limit for MODE 2 with kff < 1.0, MODES 3 and 4 is:

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

The SDM limit for MODE 5 is:

2.1.2 The shutdown margin shall be greater than or equal to 1.0 % Ak/k.

5zym7iOO.doa 04B 0502.0950

  • PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 2 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT 1 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 .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 -3.0x10-4 Ak/k/F (all rods withdrawn, RATED THERMAL POWER condition).

2.2.3 The MTC 60 ppm surveillance limit is -3.72x10-4 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) 2.5.1 FQ(Z) < E P

  • K(Z) for P > 0.5 0.

FQ(Z)*< -0.5

  • K(Z) for P*< 0.5 THERMAL POWER RATED THERMAL POWER FQRTP = 2.45 K(Z) = 1.0 2.5.2 The W(Z) curves* for Relaxed Axial Offset Control (RAOC) operation, provided in Figures 2 through 5, and Tables 2A and 2B are sufficient to determine the RAOC W(Z) versus core height for Cycle 11 burnups through the end of full power reactivity plus a power coastdown 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 FQW(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.

Note that the W(Z) data is appropriate for use if the predicted axial offset is within +/-3% of the measured value.

5zym7iO0.doa 04B 0502.0950

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 3 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT 1 2.5.3 FQ(Z) shall be evaluated to determine if it is within its limits by verifying that FQC(Z) and FQW(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:

FQC(Z) < FQ

  • K(Z) for P > 0.5 P

FQC(Z) < FQRT

  • K(Z) for P* 0.5 0.5 FQw(Z) < F°7 P
  • K(Z) for P > 0.5 Fq)-< F0R.P
  • K(Z) for P < 0.5

-Q0.5 where:

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

FQRTP is the FQ limit K(Z) is the normalized FQ(Z) as a function of core height P is the relative THERMAL POWER, and W(z) is the cycle dependent function that accounts for power distribution transients encountered during normal operation.

FQRI'P and K(Z) are specified in 2.5.1 and W(Z) is specified in 2.5.2.

FQW(Z) is the total peaking factor, FQC(Z), multiplied by W(Z) which gives the maximum FQ(Z) calculated to occur in normal operation.

5zym7iOO.doa 04B 0502.0950

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 4 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT 1 2.6 Nuclear Enthalpy Rise Hot Channel Factor (TS 3.2.2)

FAHN < FAHRTP *[1 + PFH * (1-P)]

where:

_ THERMAL POWER RATED THERMAL POWER FHtN = Measured values of FaHlN obtained by using the moveable incore detectors to obtain a power distribution map.

FAR TP = 1.59 PFAH = 0.3 2.7 Axial Flux Difference (TS 3.2.3) 2.7.1 The Axial Flux Difference (AFD) Limits are provided in Figure 6.

2.8 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:

2.8.1 A k~f of 0.95 or less, which includes a 1% Ak/k conservative allowance for uncertainties, or 2.8.2 A boron concentration of greater than or equal to 2000 ppm, which includes a 50 ppm conservative allowance for uncertainties.

5zym7iOO.doa 04B 0502.0950

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 5 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT 1

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 22,000 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, "Load Follow W(Z) at 150 MWD/MTU as a Function of Core Height."

4.3 Figure 3, "Load Follow W(Z) at 4,000 MWD/MTU as a Function of Core Height."

4.4 Figure 4, "Load Follow W(Z) at 12,000 MWD/MTU as a Function of Core Height."

4.5 Figure 5, "Load Follow W(Z) at 22,000 MWD/MTU as a Function of Core Height."

4.6 Figure 6, "AFD Limits as a Function of Rated Thermal Power."

5. RECORDS None
6. REFERENCES 6.1 Westinghouse Reload Safety Evaluation for Diablo Canyon Power Plant Unit 1 Cycle 12, dated February 2002.
7. SPONSOR Jay Lesko 5zym7iOO.doa ' 04B 0502.0950

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 6 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT 1 Table 1 FQ Margin Decreases in Excess of 2 % Per 31 EFPD Cycle Max. % Decrease Bumup in FQ Margin 0 3.84 150 3.84 313 3.92 476 3.99 638 4.10 801 4.05 964 3.84 1127 3.48 1290 3.00 1453 2.46 1615 2.00 7314 2.00 7477 2.14 7640 2.28 7803 2.31 7966 2.32 8128 2.32 8291 2.26 8454 2.17 8617 2.06 8780 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 burnups.

5zym7iOO.doa 04B 0502.0950

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 7 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT I Table 2A Load Follow W(Z) Factors at 150 and 4000 MWD/MTU as a Function of Core Height HEIGHT 150 MWD/MTU HEIGHT 4000 MWD/MTU (FEET) W(Z) (FEET) W(Z)

  • 0.0000 1.0000 *0.0000 1.0000
  • 0.2000 1.0000 *0.2000 1.0000
  • 0.4000 1.0000 *0.4000 1.0000
  • 0.6000 1.0000 *0.6000 1.0000
  • 0.8000 1.0000 *0.8000 1.0000
  • 1.0000 1.0000 *1.0000 1.0000

"*1.2000 1.0000 "*1.2000 1.0000

"*1.4000 1.0000 "*1.4000 1.0000

"*1.6000 1.0000 "*1.6000 1.0000

"*1.8000 1.0000 "*1.8000 1.0000 2.0000 1.2196 2.0000 1.2625 2.2000 1.2015 2.2000 1.2388 2.4000 1.1832 2.4000 1.2150 2.6000 1.1647 2.6000 1.1912 2.8000 1.1500 2.8000 1.1692 3.0000 1.1415 3.0000 1.1522 3.2000 1.1385 3.2000 1.1417 3.4000 1.1380 3.4000 1.1367 3.6000 1.1366 3.6000 1.1347 3.8000 1.1341 3.8000 1.1320 4.0000 1.1324 4.0000 1.1311 4.2000 1.1321 4.2000 1.1314 4.4000 1.1331 4.4000 1.1306 4.6000 1.1334 4.6000 1.1286 4.8000 1.1331 4.8000 1.1263 5.0000 1.1323 5.0000 1.1235 5.2000 1.1316 5.2000 1.1199 5.4000 1.1333 5.4000 1.1152 5.6000 1.1412 5.6000 1.1127 5.8000 1.1514 5.8000 1.1169 NOTE: W(Z) values given above for 150 and 4000 MWD/MTU are plotted in COLR Figures 2 and 3, respectively.

  • Top and Bottom 15 % Excluded 5zym7iOO.doa 04B 0502.0950

"PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 8 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT 1 Table 2A (Continued) Load Follow W(Z) Factors at 150 and 4000 MWD/MTU as a Function of Core Height HEIGHT 150 MWD/MTU HEIGHT 4000 MWD/MTU (FEET) W(Z) (FEET) W(Z) 6.0000 1.1640 6.0000 1.1295 6.2000 1.1785 6.2000 1.1431 6.4000 1.1914 6.4000 1.1557 6.6000 1.2032 6.6000 1.1676 6.8000 1.2139 6.8000 1.1786 7.0000 1.2227 7.0000 1.1880 7.2000 1.2305 7.2000 1.1964 7.4000 1.2394 7.4000 1.2049 7.6000 1.2477 7.6000 1.2141 7.8000 1.2541 7.8000 1.2215 8.0000 1.2582 8.0000 1.2296 8.2000 1.2599 8.2000 1.2396 8.4000 1.2606 8.4000 1.2466 8.6000 1.2601 8.6000 1.2505 8.8000 1.2604 8.8000 1.2553 9.0000 1.2678 9.0000 1.2689 9.2000 1.2840 9.2000 1.2913 9.4000 1.3032 9.4000 1.3171 9.6000 1.3201 9.6000 1.3401 9.8000 1.3323 9.8000 1.3566 10.0000 1.3525 10.0000 1.3695

  • 10.2000 1.0000 "*10.2000 1.0000

"*10.4000 1.0000 *10.4000 1.0000

  • 10.6000 1.0000
  • 10.6000 1.0000
  • 10.8000 1.0000 *10.8000 1.0000
  • 11.0000 1.0000
  • 11.0000 1.0000
  • 11.2000 1.0000 *11.2000 1.0000
  • 11.4000 1.0000
  • 11.4000 1.0000
  • 11.6000 1.0000 *11.6000 1.0000
  • 11.8000 1.0000
  • 11.8000 1.0000
  • 12.0000 1.0000 "*12.0000 1.0000 NOTE: W(Z) values given above for 15' 0 and 4000 MWD/MTU are plotted in COLR Figures 2 and 3, respectively.
  • Top and Bottom 15% Excluded 5zym7iOO.doa 04B 0502.0950

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 9 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT 1 Table 2B Load Follow W(Z) Factors at 12000 and 22000 MWD/MTU as a Function of Core Height HEIGHT 12000 MWD/MTU HEIGHT 22000 MWD/MTU (FEET) W(Z) (FEET) W(Z)

  • 0.0000 1.0000 *0.0000 1.0000
  • 0.2000 1.0000 *0.2000 1.0000
  • 0.4000 1.0000 *0.4000 1.0000
  • 0.6000 1.0000 *0.6000 1.0000
  • 0.8000 1.0000 *0.8000 1.0000
  • 1.0000 1.0000 *1.0000 1.0000
  • 1.2000 1.0000 *1.2000 1.0000
  • 1.4000 1.0000 *1.4000 1.0000
  • 1.6000 1.0000 *1.6000 1.0000
  • 1.8000 1.0000 *1.8000 1.0000 2.0000 1.2385 2.0000 1.2204 2.2000 1.2254 2.2000 1.2059 2.4000 1.2119 2.4000 1.1913 2.6000 1.1983 2.6000 1.1763 2.8000 1.1830 2.8000 1.1646 3.0000 1.1743 3.0000 1.1597 3.2000 1.1723 3.2000 1.1612 3.4000 1.1698 3.4000 1.1699 3.6000 1.1677 3.6000 1.1822 3.8000 1.1704 3.8000 1.1937 4.0000 1.1728 4.0000 1.2030 4.2000 1.1745 4.2000 1.2116 4.4000 1.1753 4.4000 1.2213 4.6000 1.1756 4.6000 1.2303 4.8000 1.1792 4.8000 1.2363 5.0000 1.1836 5.0000 1.2448 5.2000 1.1859 5.2000 1.2622 5.4000 1.1871 5.4000 1.2869 5.6000 1.1894 5.6000 1.3085 5.8000 1.2024 5.8000 1.3271 NOTE: W(Z) values given above for 12000 and 22000 MWD/MTU are plotted in COLR Figures 4 and 5, respectively.
  • Top and Bottom 15 % Excluded 5zym7iOO.doa 04B 0502.0950

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 10 OF 16 TITLE: COLR for Diablo Canyon Unit I Cycle 12 UNIT 1 Table 2B (Continued) Load Follow W(Z) Factors at 12000 and 22000 MWD/MTU as a Function of Core Height HEIGHT 12000 MWD/MTU HEIGHT 22000 MWD/1* 4TU (FEET) W(Z) (FEET) W(Z) 6.0000 1.2192 6.0000 1.3432 6.2000 1.2324 6.2000 1.3564 6.4000 1.2442 6.4000 1.3667 6.6000 1.2540 6.6000 1.3738 6.8000 1.2615 6.8000 1.3774 7.0000 1.2670 7.0000 1.3780 7.2000 1.2704 7.2000 1.3754 7.4000 1.2712 7.4000 1.3688 7.6000 1.2692 7.6000 1.3583 7.8000 1.2644 7.8000 1.3437 8.0000 1.2563 8.0000 1.3249 8.2000 1.2458 8.2000 1.3021 8.4000 1.2354 8.4000 1.2753 8.6000 1.2250 8.6000 1.2481 8.8000 1.2154 8.8000 1.2408 9.0000 1.2049 9.0000 1.2392 9.2000 1.1997 9.2000 1.2338 9.4000 1.2280 9.4000 1.2305 9.6000 1.2558 9.6000 1.2267 9.8000 1.2808 9.8000 1.2347 10.0000 1.3045 10.0000 1.2573

  • 10.2000 1.0000 *10.2000 1.0000

"*10.4000 1.0000 *10.4000 1.0000

"*10.6000 1.0000 *10.6000 1.0000

  • 10.8000 1.0000 *10.8000 1.0000
  • 11.0000 1.0000
  • 11.0000 1.0000
  • 11.2000 1.0000 *11.2000 1.0000
  • 11.4000 1.0000
  • 11.4000 1.0000
  • 11.6000 1.0000 *11.6000 1.0000
  • 11.8000 1.0000
  • 11.8000 1.0000
  • 12.0000 1.0000 *12.0000 1.0000 NOTE: W(Z) values given above for 12000 and 22000 MWD/MTU are plotted in COLR Figures 4 and 5, respectively.
  • Top and Bottom 15 % Excluded 5zym7iOO.doa 04B 0502.0950

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 11 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT 1 225

-- (0.17,225) ------

I------

(0.68,225)

I------- -----

I-------

I------

I------------

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200

------ ------------- ------ ---- ------ ------- I------------ I------- ------ -----

11

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175 -(0.0,183) z

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  • 150 -z

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(0.29,0) :------ --- --  :------- ------ ------ --Positions: >225 - Steps And <231 Steps

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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 5zym7iOO.doa 04B 0502.0950

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 12 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT 1 1.4 1.3 N

S1.2 46

,-J v~p 0

- A- '

1.1

- - - -- - ~ - - - - - - - - - -

1.0 0 2 4 6 8 10 12 Bottom Core Height (Feet) Top Figure 2 Load Follow W(Z) at 150 MWD/MTU as a Function of Core Height

  • Top and Bottom 15 % Excluded 5zym7iOO.doa 04B 0502.0950

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 13 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT 1 1.4 .

1.3 S1.2 -

0 "0 0 1.1 1.0- - - -

0 2 4 6 8 10 12 Bottom Core Height (Feet) Top Figure 3 Load Follow W(Z) at 4000 MWD/MTU as a Function of Core Height

  • Top and Bottom 15 % Excluded 5zym7iO0.doa 04B 0502.0950

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 14 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT 1 1.4 1.3 1.2 Co, 1.1 ~ ~ S /

1.0 0 2 4 6 8 10 12 Bottom Core Height (Feet) Top Figure 4 Load Follow W(Z) at 12000 MWD/MTU as a Function of Core Height

  • Top and Bottom 15 % Excluded 5zymMi0O.doa 04B 0502.0950

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 15 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT 1 1.4

4. .

1.3 41* *

  • I0iI I*

1.2 0

0 1.1

~~1~~1~~~ - ..6j111 1.0 0 2 4 6 8 10 12 Bottom Core Height (Feet) Top Figure 5 Load Follow W(Z) at 22000 MWD/MTU as a Function of Core Height

  • Top and Bottom 15 % Excluded 5zym7iOO.doa 04B 0502.0950

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1-12 DIABLO CANYON POWER PLANT REVISION 0 PAGE 16 OF 16 TITLE: COLR for Diablo Canyon Unit 1 Cycle 12 UNIT 1 Figure 6 AFD Limits as a Function of Rated Thermal Power 120 100 80 I0 0.

(U E

"a 60 O

0, 40 20 0

-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 Flux Difference (DELTA I) %

5zym7iOO.doa 04B 0502.0950

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