DCL-08-072, Core Operating Limits Report: Difference between revisions

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{{#Wiki_filter:Pacific Gas and Electric Company'James R. Becker Site Vice President and Station Director Diablo Canyon Power Plant Mail Code 104/5/502 P. 0. Box 56 Avila Beach, CA 93424 August 13, 2008 805.545.3462 Internal:
{{#Wiki_filter:PacificGasand Electric Company' James R. Becker             Diablo Canyon Power Plant Site Vice President and     Mail Code 104/5/502 Station Director            P. 0. Box 56 Avila Beach, CA 93424 August 13, 2008                                                                           805.545.3462 Internal: 691.3462 Fax: 805.545.4234 PG&E Letter DCL-08-072 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Docket No. 50-323, OL-DPR-82 Diablo Canyon Unit 2 Core Oneratina Limits Renort for Unit 2
691.3462 Fax: 805.545.4234 PG&E Letter DCL-08-072 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Docket No. 50-323, OL-DPR-82 Diablo Canyon Unit 2 Core Oneratina Limits Renort for Unit 2 Dear Commissioners and Staff: In accordance with Diablo Canyon Power Plant Technical Specification 5.6.5.d, enclosed is the Core Operating Limits Report (COLR) for Unit 2. The COLR has been revised for Unit 2 Cycle 15.There are no new or revised regulatory commitments in this report.If there are any questions regarding the COLR, please contact Mr. Steve Hamilton at (805) 545-3449.Sincerely, James R.Bce jzbs/A0732901 Enclosure cc: Diablo Distribution cc/enc: Elmo E. Collins, NRC Region IV Michael S. Peck, NRC Senior Resident Inspector Alan B. Wang, NRR Project Manager A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway
 
==Dear Commissioners and Staff:==
 
In accordance with Diablo Canyon Power Plant Technical Specification 5.6.5.d, enclosed is the Core Operating Limits Report (COLR) for Unit 2. The COLR has been revised for Unit 2 Cycle 15.
There are no new or revised regulatory commitments in this report.
If there are any questions regarding the COLR, please contact Mr. Steve Hamilton at (805) 545-3449.
Sincerely, James R.Bce jzbs/A0732901 Enclosure cc:         Diablo Distribution cc/enc:     Elmo E. Collins, NRC Region IV Michael S. Peck, NRC Senior Resident Inspector Alan B. Wang, NRR Project Manager A member of the STARS   (Strategic Teaming and Resource     Sharing)     Alliance Callaway
* Comanche Peak
* Comanche Peak
* Diablo Canyon
* Diablo Canyon
* Palo Verde
* Palo Verde
* South Texas Project
* South Texas Project
* Wolf Creek AMI k I Pe-Enclosure PG&E Letter DCL-08-072 CORE OPERATING LIMITS REPORT (COLR)DIABLO CANYON POWER PLANT UNIT 2 CYCLE 15 EFFECTIVE DATE AUGUST 5, 2008  
* Wolf Creek AMI kI Pe-
***ISSUED FOR USE BY: DATE: EXPIRES:____
 
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 NUCLEAR POWER GENERATION REVISION 2 DIABLO CANYON POWER PLANT PAGE 1 OF 12 CORE OPERATING LIMITS REPORT UNIT TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 EFFECTIVE DATE PROCEDURE CLASSIFICATION:
Enclosure PG&E Letter DCL-08-072 CORE OPERATING LIMITS REPORT (COLR)
QUALITY RELATED 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 lfr < 1.0, MODES 3, 4, and 5)... 3.1.3 .- Moderator Temperature Coefficient-
DIABLO CANYON POWER PLANT UNIT 2 CYCLE 15 EFFECTIVE DATE AUGUST 5, 2008
* 3.1.4 -Rod Group Alignment Limits* 3.1.5 -Shutdown Bank Insertion Limits* 3.1.6 -Control Bank Insertion Limits e 3.2.1 -Heat Flux Hot Channel Factor -FQ(Z)* 3.2.2 -Nuclear Enthalpy Rise Hot Channel Factor -F N AH* 3.2.3 -Axial Flux Difference  
 
-(AFD)e .3.4.1 -RCS Pressure, Temperature, and Flow Departure from Nucleate Boiling (DNB) Limits* 3.9.1 -*Boron Concentration
***ISSUED FOR USE BY:                                 DATE:                 EXPIRES:____
: 2. OPERATING LIMITS The cycle-specific parameter limits for the TS listed in Section 1 are presented in the following subsections.
PACIFIC GAS AND ELECTRIC COMPANY                                                   NUMBER         COLR 2 NUCLEAR POWER GENERATION                                                           REVISION 2 DIABLO CANYON POWER PLANT                                                         PAGE           1 OF 12 CORE OPERATING LIMITS REPORT                                                     UNIT TITLE:     COLR for Diablo Canyon Unit 2 Cycle 15 EFFECTIVE DATE PROCEDURE CLASSIFICATION: QUALITY RELATED 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.
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 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.
1.2     The Technical Specifications affected by this report are listed below:
COLR_2u2r02DOC 04B 0805.1239 PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 2 OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 2.2 Shutdown Margin (SDM) (TS 3.1.4, 3.1.5, 3.1.6)The SDM for MODE 1 and MODE 2 with klff> 1.0 is: 2.2.1 The shutdown margin shall be greater than or equal to 1.6% Ak/k.2.3 Moderator.Temperature Coefficient (MTC) (TS 3.1.3)The MTC limit for MODES 1, 2, and 3 is: 2.3.1 The MTC shall be less negative than -3.9x104 Ak/k/&deg;F for all rods withdrawn, end of cycle life (EOL), RATED THERMAL POWER condition.
* 3.1.1   - Shutdown Margin (MODE 2 with lfr < 1.0, MODES 3, 4, and 5)
2.3.2 The MTC 300 ppm surveillance limit is -3.Ox104 Ak/k/&deg;F (all rods withdrawn, RATED THERMAL POWER condition).
  ...               3.1.3 .-   Moderator Temperature Coefficient-
2.3.3 The MTC 60 ppm surveillance limit is -3.72x10 4 Ak/k/&deg;F (all rods withdrawn, RATED THERMAL POWER condition).
* 3.1.4 -   Rod Group Alignment Limits
---------
* 3.1.5   - Shutdown Bank Insertion Limits
2.4 --... .Shutdown Bank Insertion Limits-(TS 3.1.5)----.
* 3.1.6 -   Control Bank Insertion Limits e   3.2.1 -   Heat Flux Hot Channel Factor - FQ(Z)
2.4.1 Each shutdown bank shall be withdrawn to at least 225 steps.2.5 Control Bank Insertion Limits (TS 3.1.6)2.5.1 The control banks shall be limited in physical insertion as shown in Figure 1.2.6 Heat Flux Hot Channel Factor -FQ(Z) (TS 3.2.1)FRTP 2.6.1 FQ(Z)<Q ' *K(Z) for P > 0.5 P FRTP FQ(Z)<5 *K(Z) for_ i 0.5 0.5 THERMAL POWER where: P =RATED THERMAL POWER F RTP = 2.5 8 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.2.6.2 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_2u2r02.DOC 04B 0805.1239 PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 3 OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 2.6.3 FQ(Z) shall be evaluated to determine if it is within its limits by verifying that FC(Z) and F (Z) satisfy the following:
* 3.2.2 -   Nuclear Enthalpy Rise Hot Channel Factor - F N AH
: 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.
* 3.2.3 -   Axial Flux Difference - (AFD) e .3.4.1   - RCS Pressure, Temperature, and Flow Departure from Nucleate Boiling (DNB) Limits
: c. Satisfying the following relationship:
* 3.9.1 - *BoronConcentration
F C(Z)K< ) for P > 0.5 P FQFc(Z)<()_ W Fr F (Z) < Q *K(Z) for P > 0.5 Q P< T 0F *K(Z) for P_< 0.5 where: F C (Z) is the measured FQ(Z) increased by the allowances for manufacturing tolerances and measurement uncertainty.
: 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.
F RTP is the FQ limit Q K(Z) is the normalized FQ(Z) as a function of core height P is the relative THERMAL POWER, and F _ (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.
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 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_2u2r02DOC   04B         0805.1239
 
PACIFIC GAS AND ELECTRIC COMPANY                                                       NUMBER       COLR 2 DIABLO CANYON POWER PLANT                                                             REVISION     2 PAGE         2 OF 12 TITLE:         COLR for Diablo Canyon Unit 2 Cycle 15                               UNIT           2 2.2       Shutdown Margin (SDM) (TS 3.1.4, 3.1.5, 3.1.6)
The SDM for MODE 1 and MODE 2 with klff> 1.0 is:
2.2.1     The shutdown margin shall be greater than or equal to 1.6% Ak/k.
2.3       Moderator.Temperature Coefficient (MTC) (TS 3.1.3)
The MTC limit for MODES 1, 2, and 3 is:
2.3.1     The MTC shall be less negative than -3.9x104 Ak/k/&deg;F for all rods withdrawn, end of cycle life (EOL), RATED THERMAL POWER condition.
2.3.2     The MTC 300 ppm surveillance limit is -3.Ox104 Ak/k/&deg;F (all rods withdrawn, RATED THERMAL POWER condition).
4 2.3.3     The MTC 60 ppm surveillance limit is -3.72x10     Ak/k/&deg;F (all rods withdrawn, RATED THERMAL POWER condition).
--------- 2.4 --... .Shutdown Bank Insertion Limits-(TS 3.1.5)----.
2.4.1     Each shutdown bank shall be withdrawn to at least 225 steps.
2.5       Control Bank Insertion Limits (TS 3.1.6) 2.5.1     The control banks shall be limited in physical insertion as shown in Figure 1.
2.6       Heat Flux Hot Channel Factor - FQ(Z) (TS 3.2.1)
FRTP 2.6.1     FQ(Z)<Q   '     *K(Z)     for P > 0.5 P
FRTP FQ(Z)<5 *K(Z)             for_
i     0.5 0.5 THERMAL POWER where: P =
RATED THERMAL POWER F RTP = 2.5 8 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.
2.6.2     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_2u2r02.DOC     04B       0805.1239
 
PACIFIC GAS AND ELECTRIC COMPANY                                                   NUMBER         COLR 2 DIABLO CANYON POWER PLANT                                                         REVISION       2 PAGE           3 OF 12 TITLE:       COLR for Diablo Canyon Unit 2 Cycle 15                               UNIT           2 2.6.3     FQ(Z) shall be evaluated to determine if it is within its limits by verifying that FC(Z) and F         (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:
F C(Z)K<             )   for P > 0.5 P
FQFc(Z)<()_
                                                *RTP W         Fr F     (Z) < Q *K(Z)               for P > 0.5 Q           P FW*(Z) <       T 0F *K(Z) for P_< 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 P is the relative THERMAL POWER, and F _ (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.
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 2.6.1 and W(Z) is specified in 2.6.2.Q I COLR_2u2r02.DOC 04B 0805.1239 PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 4 OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 2.7 Nuclear Enthalpy Rise Hot Channel Factor -F N (TS 3.2.2)AH FN < FRTP, *[ + PF * (l-P)]FAH A where: THERMAL POWER P9 = _ _ _ _ _RATED THERMAL POWER F N =Measured values of FN obtained by using the moveable incore detectors to AH AH obtain a power distribution map.F RTP = 1.59 (includes the 4% measurement uncertainty)
F RTP and K(Z) are specified in 2.6.1 and W(Z) is specified in 2.6.2.
AH.. .... .... .. ....PiFAH 0.3 = Powver Factor M ufIltip-lier  
Q I COLR_2u2r02.DOC 04B       0805.1239
.. ...... ..... .. ...... .. .... .. ......2.8 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 N, shall be calculated by the following formula: UFAH =l.0+t U&H 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 2.7 equation).
 
All 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: UFQ .0+/-+ .o )*Ue where: UQ = Uncertainty for power peaking factor as defined in equation (5-19) in Reference 6.2.Ue Engineering uncertainty factor= 1.03' N If the PDMS is inoperable, the Nuclear Enthalpy Rise Hot Channel Factor, F ANH, shall be calculated as specified in Section 2.7.If the PDMS is inoperable, the Heat Flux Hot Channel Factor, FQ(Z), shall be calculated as specified in Section 2.6.COLR_2u2r02.DOC 04B 0805.1239.
PACIFIC GAS AND ELECTRIC COMPANY                                                           NUMBER         COLR 2 DIABLO CANYON POWER PLANT                                                                   REVISION       2 PAGE           4 OF 12 TITLE:       COLR for Diablo Canyon Unit 2 Cycle 15                                       UNIT           2 2.7       Nuclear Enthalpy Rise Hot Channel Factor - F AH      N (TS 3.2.2)
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 5 OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 2.9 Axial Flux Difference (TS 3.2.3)2.9.1 The Axial Flux Difference (AFD) Limits are provided in Figure 2.2.10 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: 2.10.1 A keff of 0.95 or less, with the most reactive control rod assembly completely withdrawn, or 2.10.2 A boron concentration of greater than or equal to 2000 ppm.2.11 RCS Pressure and Temperature Departure from Nucleate Boiling (DNB) Limit (TS 3.4.1)2.11.1 Pressurizer pressure is greater than or equal to 2175 psig.2.11.2 RCS average temperature is less than or equalto 581.7&deg;F.NOTE: The DNBR RCS TAVG- iMiiis b-s edo- 1h-e-sligh-tly 16wer-d biihdifig-val...associated with Unit 1 in order to have the same surveillance limits for both Unit I 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, "AFD Limits as a Function of Rated Thermal 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_2u2r02.DOC 04B 0805.1239 PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 NUMBER REVISION PAGE .COLR 2 2 6, OF 12 2 UNIT Table 1: FQ Margin Decreases in Excess of 2% Per 31 EFPD Cycle Max. % Decrease Burnup 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-......16-1 -- ---1 ... ... .... .-~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.COLR_2u2r02.DOC 04B 0805.1239 PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 NUMBER REVISION PAGE UNIT COLR 2 2 7 OF 12 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 1.8000 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 1.4525 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....16000
FN < FRTP, *[ + PF             * (l-P)]
...-.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 J .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_2u2r02.DOC 04B 0805.1239 PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 NUMBER REVISION PAGE UNIT COLR 2 2 8 OF 12 2 TABLE 2A: Load Follow W(Z) Factors at 150 and 4000 MWD/MTU as a Function of Core Height (Continued)
FAH         A where:
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 1.23771 1.2373 1.2317 1.2261* Top and Bottom 8% excluded COLR_2u2r02.DOC 04B 0805.1239 PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 NUMBER COLR 2 REVISION 2 PAGE 9 OF: 12 UNIT 2 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.-600-0 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-. 2r94 --... -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_2u2r02.DOC 04B 0805.1239 PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 NUMBER REVISION PAGE COLR 2 2 10 OF 12 2 UNIT Table 2B: Load Follow W(Z) Factors at 12000 and 20000 MWD/MTU as a Function of Core Height (Continued)
P9             =   _
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 10.0,OO 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_2u2r02.DOC 04B 0805.1239 PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 NUMBER REVISION PAGE UNIT COLR 2 2 11 OF 12 2 0.CL)0 70 0~CL 225 200 175 150 125 100 75 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_2u2r02.DOC 04B 0805.1239 PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 NUMBER. COLR 2 REVISION 2 PAGE 12 OF 12 UNIT.2 120 100 80 0 60 0 40 20.0-(-14,10) F(+10,100)-
THERMAL
UNACCEPTABLE
_ _
--UNACCEPTABLE OPERATION LOPERATION ACCEPTABLE I(-30,50) f(+-25,5-01) 50 30 10 0 10 20 30 40 50 60 Flux Difference (DELTA I) %Figure 2: AFD Limits as a Function of Rated Thermal Power COLR_2u2r02.DOC 04B 0805.1239}}
POWER
_      _
RATED THERMAL POWER FNAH          =Measured values of FN   AH obtained by using the moveable incore detectors to obtain a power distribution map.
F AH RTP         = 1.59 (includes the 4% measurement uncertainty)
  ... ....
      ... ..   . ...PiFAH           0.3 = Powver Factor M ufIltip-lier .. . . .... . ....   .. ......   .. .... .. . . . . ..
2.8       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 N,           shall be calculated by the following formula:
UFAH =l.0+t U&H 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 2.7 equation).
All 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:
UFQ       .0+/-+ *    .o )*Ue where:       UQ = Uncertainty for power peaking factor as defined in equation (5-19) in Reference 6.2.
Ue     Engineering uncertainty factor
                                        = 1.03
                                                '                                                         N If the PDMS is inoperable, the Nuclear Enthalpy Rise Hot Channel Factor, F ANH, shall be calculated as specified in Section 2.7.
If the PDMS is inoperable, the Heat Flux Hot Channel Factor, FQ(Z), shall be calculated as specified in Section 2.6.
COLR_2u2r02.DOC     04B           0805.1239.
 
PACIFIC GAS AND ELECTRIC COMPANY                                                     NUMBER       COLR 2 DIABLO CANYON POWER PLANT                                                           REVISION     2 PAGE         5 OF 12 TITLE:       COLR for Diablo Canyon Unit 2 Cycle 15                                 UNIT         2 2.9       Axial Flux Difference (TS 3.2.3) 2.9.1       The Axial Flux Difference (AFD) Limits are provided in Figure 2.
2.10     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:
2.10.1     A keff of 0.95 or less, with the most reactive control rod assembly completely withdrawn, or 2.10.2     A boron concentration of greater than or equal to 2000 ppm.
2.11     RCS Pressure and Temperature Departure from Nucleate Boiling (DNB) Limit (TS 3.4.1) 2.11.1     Pressurizer pressure is greater than or equal to 2175 psig.
2.11.2     RCS average temperature is less than or equalto 581.7&deg;F.
NOTE: The DNBR RCS TAVG- iMiiis b-s edo- 1h-e-sligh-tly 16wer-d biihdifig-val...
associated with Unit 1 in order to have the same surveillance limits for both Unit I 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, "AFD Limits as a Function of Rated Thermal 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_2u2r02.DOC 04B         0805.1239
 
PACIFIC GAS AND ELECTRIC COMPANY                                                 NUMBER      COLR 2 DIABLO CANYON POWER PLANT                                                         REVISION 2 PAGE .      6, OF 12 TITLE:       COLR for Diablo Canyon Unit 2 Cycle 15                               UNIT        2 Table 1: FQ Margin Decreases in Excess of 2% Per 31 EFPD Cycle               Max. % Decrease Burnup                   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 16-1 1--... -... -- .... ~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.
COLR_2u2r02.DOC 04B       0805.1239
 
PACIFIC GAS AND ELECTRIC COMPANY                                                   NUMBER        COLR 2 DIABLO CANYON POWER PLANT                                                           REVISION      2 PAGE          7 OF 12 TITLE:       COLR for Diablo Canyon Unit 2 Cycle 15                               UNIT           2 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              1.6042
* 0.0000              1.5297
* 0.2000              1.5982
* 0.2000               1.5219
* 0.4000               1.5885
* 0.4000              1.5117
* 0.6000              1.5765
* 0.6000               1.5001
* 0.8000               1.5621
* 0.8000              1.4871 1.0000                1.5448                          1.0000               1.4716 1.2000               1.5246                          1.2000                1.4532 1.4000                1.5023                          1.4000               1.4326 1....16000 ...-. J .4101 .......
1.4525 1.8000                                                1.8000                1.3862 1.4257 2.0000                                                2.0000                1.3612 2.2000                1.3977                        2.2000                1.3349 2.4000                1.3691                        2.4000                 1.3088 1.3399                        2.6000                1.2864 2.6000 2.8000                1.3092                        2.8000                1.2637 3.0000                1.2844                        3.0000                 1.2433 3.2000                 1.2705                        3.2000                1.2286 3.4000                1.2626                        3.4000                1.2198 3.6000                1.2528                        3.6000                 1.2154 3.8000                 1.2430                        3.8000                1.2111 4.0000                 1.2356                        4.0000                1.2056 4.2000                1.2291                        4.2000                 1.1991 4.4000                 1.2209                        4.4000                 1.1916 4.6000                1.2118                        4.6000                1.1832 4.8000                1.2017                        4.8000                1.1739 5.0000                1.1907                        5.0000                1.1636 5.2000                1.1791                        5.2000                1.1531 5.4000                1.1667                        5.4000                1.1425 5.6000                1.1545                        5.6000                1.1316 5.8000                1.1594                        5.8000                1.1319
* Top and Bottom 8% excluded COLR_2u2r02.DOC     04B       0805.1239
 
PACIFIC GAS AND ELECTRIC COMPANY NUMBER          COLR 2 DIABLO CANYON POWER PLANT                                                     REVISION        2 PAGE            8 OF 12 TITLE:       COLR for Diablo Canyon Unit 2 Cycle 15                           UNIT           2 TABLE 2A: Load Follow W(Z) Factors at 150 and 4000 MWD/MTU as a Function of Core Height (Continued)
HEIGHT         150 MWD/MTU                          HEIGHT          4000 MWD/MTU (FEET)                W(Z)                          (FEET)              W(Z) 6.0000             1.1720                            6.0000            1.1405 6.2000            1.1805                            6.2000             1.1495 6.4000             1.1886                            6.4000            1.1575 6.6000            1.1954                            6.6000             1.1645 6.8000             1.2008                            6.8000            1.1703 7.0000            1.2047                            7.0000           .1.1750 7.2000             1.2069                            7.2000            1.1781 7.4000            1.2073                            7.4000             1.1798 7.6000---    . 1:2056--                            -7.6000            1:1805--. .
7.8000            1.2017                            7.8000            1.1797 8.0000            1.1955                            8.0000            1.1768 8.2000            1.1869                            8.2000            1.1721 8.4000            1.1758                           8.4000            1.1654 8.6000            1.1622                            8.6000            1.1553 8.8000            1.1460                            8.8000            1.1521 9.0000            1.1280                            9.0000            1.1527 9.2000            1.1136                            9.2000            1.1556 9.4000            1.1094                            9.4000            1.1588 9.6000            1.1075                            9.6000             1.1637 9.8000             1.1057-                          9.8000            1.1704 10.0000            1.1057                            10.0000             1.1794 10.2000           1.1090                            10.2000            1.1897 10.4000            1.1153                            10.4000             1.1991 10.6000           1.1212                            10.6000            1.2076 10.8000            1.1267                            10.8000             1.2155 11.0000           1.1312                            11.0000          "1.2213
* 11.2000            1.1370
* 11.2000              1.2274
* 11.4000            1.1462
* 11.4000             1.23771
* 11.6000            1.1469
* 11.6000              1.2373
* 11.8000            1.1407
* 11.8000              1.2317
* 12.0000            1.1345
* 12.0000              1.2261
* Top and Bottom 8% excluded COLR_2u2r02.DOC    04B      0805.1239
 
PACIFIC GAS AND ELECTRIC COMPANY                                          NUMBER          COLR 2 DIABLO CANYON POWER PLANT                                                  REVISION        2 PAGE            9 OF: 12 TITLE:      COLR for Diablo Canyon Unit 2 Cycle 15                        UNIT            2 Table 2B: Load Follow W(Z) Factors at 12000 and 20000 MWD/MTU as a Function of Core Height HEIGHT          12000 MWD/MTU                      HEIGHT      20000 MWD/MTU (FEET)                W(Z)                          (FEET)            W(Z)
* 0.0000              1.2124
* 0.0000        1.2866
* 0.2000              1.2155
* 0.2000        1.2872
* 0.4000              1.2153
* 0.4000        1.2840
* 0.6000              1.2129
* 0.6000        1.2783
* 0.8000              1.2083
* 0.8000         1.2699 1.0000               1.2015                          1.0000        1.2589 1.2000              1.1933                          1.2000         1.2462 1.4000               1.1844                          1.4000        1.2329 1.6000               1.1753                          1.-600-0
                                                                ----              1-.2r94 --... -
1.8000              1.1674                          1.8000         1.2059 2.0000              1.1608                          2.0000        1.1920 2.2000              1.1548                          2.2000        1.1792 2.4000              1.1489                          2.4000        1.1702 2.6000              1.1431                         2.6000        1.1653 2.8000              1.1374                          2.8000        1.1608 3.0000              1.1311                          3.0000        1.1555 3.2000              1.1273                          3.2000        1.1566 3.4000              1.1272                          3.4000        1.1678 3.6000               1.1323                          3.6000        1.1783 3.8000              1.1372                          3.8000        1.1874 4.0000              1.1403                          4.0000         1.1947 4.2000               1.1438                          4.2000        1.2019 4.4000              1.1491                          4.4000         1.2110 4.6000              1.1536                          4.6000        1.2178 4.8000             1.1568                          4.8000        1.2225 5.0000             1.1594                          5.0000        1.2259 5.2000              1.1603                          5.2000        1.2264 5.4000              1.1606                          5.4000        1.2263 5.6000              1.1715                          5.6000        1.2357 5.8000              1.1907                          5.8000
* 1.2484
* Top and Bottom 8% excluded
. COLR_2u2r02.DOC    04B      0805.1239
 
PACIFIC GAS AND ELECTRIC COMPANY                                                NUMBER          COLR 2 DIABLO CANYON POWER PLANT                                                      REVISION        2 PAGE            10 OF 12 TITLE:        COLR for Diablo Canyon Unit 2 Cycle 15                            UNIT            2 Table 2B: Load Follow W(Z) Factors at 12000 and 20000 MWD/MTU as a Function of Core Height (Continued)
HEIGHT          12000 MWD/MTU                        HEIGHT        20000 MWD/MTU (FEET)                W(Z)                           (FEET)                W(Z) 6.0000               1.2109                            6.0000            1.2595 6.2000              1.2290                            6.2000             1.2688 6.4000               1.2456                            6.4000            1.2761 6.6000              1.2605                            6.6000             1.2814 6.8000               1.2734                            6.8000            1.2844 7.0000               1.2842                            7.0000            1.2852 7.2000              1.2927                            7.2000             1.2841 7.4000               1.2986                            7.4000            1.2808
      -- 7.6000-                  1.3017.                      .....7.6000 ...   .... -..
1.2747 . . . .
7.8000              1.3020                           7.8000            1.2657 8.0000              1.2993                            8.0000            1.2539 8.2000              1.2937                            8.2000            1.2390 8.4000              1.2850                            8.4000            1.2212 8.6000              1.2720                            8.6000            1.2058 8.8000              1.2637                            8.8000            1.2035 9.0000              1.2614                            9.0000             1.2077 9.2000               1.2600                            9.2000.           1.2070 9.4000               1.2582                            9.4000            1.2049 9.6000              1.2547                            9.6000             1.2085 9.8000              1.2544                            9.8000             1.2159 10.0,OO              1.2578                          10.0000              1.2234 10.2000              1.2662                          10.2000             1.2298 10.4000               1.2726                          10.4000              1.2350 10.6000               1.2903                          10.6000              1.2544 10.8000              1.3088                          10.8000             1.2773 11.0000               1.3217                          11.0000              1.2966
* 11.2000              1.3312
* 11.2000              1.3145
* 11.4000              1.3340
* 11.4000              1.3265
* 11.6000              1.3285
* 11.6000              1.3265
* 11.8000              1.3069
* 11.8000              1.3105
* 12.0000              1.2854
* 12.0000              1.2944
* Top and Bottom 8% excluded COLR_2u2r02.DOC      04B      0805.1239
 
PACIFIC GAS AND ELECTRIC COMPANY                                              NUMBER    COLR 2 DIABLO CANYON POWER PLANT                                                      REVISION  2 PAGE      11 OF 12 TITLE:      COLR for Diablo Canyon Unit 2 Cycle 15                            UNIT      2 225 200 175 150 0.
125 CL) 0        100 70 0~
CL 75 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_2u2r02.DOC    04B      0805.1239
 
PACIFIC GAS AND ELECTRIC COMPANY                                                     NUMBER. COLR 2 DIABLO CANYON POWER PLANT                                                             REVISION  2 PAGE      12 OF 12 TITLE:       COLR for Diablo Canyon Unit 2 Cycle 15                                   UNIT     .2 120
                                      -  (-14,10)          F(+10,100)-
UNACCEPTABLE              -              -            UNACCEPTABLE 100 OPERATION                                            LOPERATION 80 ACCEPTABLE 0
60 0                     I(-30,50)                                    f(+-25,5-01) 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_2u2r02.DOC   04B         0805.1239}}

Revision as of 14:36, 14 November 2019

Core Operating Limits Report
ML082390818
Person / Time
Site: Diablo Canyon Pacific Gas & Electric icon.png
Issue date: 08/13/2008
From: Becker J
Pacific Gas & Electric Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
DCL-08-072, OL-DPR-82
Download: ML082390818 (14)
v • d • e


Text

PacificGasand Electric Company' James R. Becker Diablo Canyon Power Plant Site Vice President and Mail Code 104/5/502 Station Director P. 0. Box 56 Avila Beach, CA 93424 August 13, 2008 805.545.3462 Internal: 691.3462 Fax: 805.545.4234 PG&E Letter DCL-08-072 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Docket No. 50-323, OL-DPR-82 Diablo Canyon Unit 2 Core Oneratina Limits Renort for Unit 2

Dear Commissioners and Staff:

In accordance with Diablo Canyon Power Plant Technical Specification 5.6.5.d, enclosed is the Core Operating Limits Report (COLR) for Unit 2. The COLR has been revised for Unit 2 Cycle 15.

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

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

Sincerely, James R.Bce jzbs/A0732901 Enclosure cc: Diablo Distribution cc/enc: Elmo E. Collins, NRC Region IV Michael S. Peck, NRC Senior Resident Inspector Alan B. Wang, NRR Project Manager A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

  • Comanche Peak
  • Diablo Canyon
  • Palo Verde
  • Wolf Creek AMI kI Pe-

Enclosure PG&E Letter DCL-08-072 CORE OPERATING LIMITS REPORT (COLR)

DIABLO CANYON POWER PLANT UNIT 2 CYCLE 15 EFFECTIVE DATE AUGUST 5, 2008

      • ISSUED FOR USE BY: DATE: EXPIRES:____

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 NUCLEAR POWER GENERATION REVISION 2 DIABLO CANYON POWER PLANT PAGE 1 OF 12 CORE OPERATING LIMITS REPORT UNIT TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 EFFECTIVE DATE PROCEDURE CLASSIFICATION: QUALITY RELATED 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:

... 3.1.3 .- Moderator Temperature Coefficient-

  • 3.1.4 - Rod Group Alignment Limits
  • 3.1.5 - Shutdown Bank Insertion Limits
  • 3.1.6 - Control Bank Insertion Limits e 3.2.1 - Heat Flux Hot Channel Factor - FQ(Z)
  • 3.2.2 - Nuclear Enthalpy Rise Hot Channel Factor - F N AH
  • 3.2.3 - Axial Flux Difference - (AFD) e .3.4.1 - RCS Pressure, Temperature, and Flow Departure from Nucleate Boiling (DNB) Limits
  • 3.9.1 - *BoronConcentration
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 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_2u2r02DOC 04B 0805.1239

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 2 OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 2.2 Shutdown Margin (SDM) (TS 3.1.4, 3.1.5, 3.1.6)

The SDM for MODE 1 and MODE 2 with klff> 1.0 is:

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

2.3 Moderator.Temperature Coefficient (MTC) (TS 3.1.3)

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

2.3.1 The MTC shall be less negative than -3.9x104 Ak/k/°F for all rods withdrawn, end of cycle life (EOL), RATED THERMAL POWER condition.

2.3.2 The MTC 300 ppm surveillance limit is -3.Ox104 Ak/k/°F (all rods withdrawn, RATED THERMAL POWER condition).

4 2.3.3 The MTC 60 ppm surveillance limit is -3.72x10 Ak/k/°F (all rods withdrawn, RATED THERMAL POWER condition).

2.4 --... .Shutdown Bank Insertion Limits-(TS 3.1.5)----.

2.4.1 Each shutdown bank shall be withdrawn to at least 225 steps.

2.5 Control Bank Insertion Limits (TS 3.1.6) 2.5.1 The control banks shall be limited in physical insertion as shown in Figure 1.

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

FRTP 2.6.1 FQ(Z) 0.5 P

FRTP FQ(Z)<5 *K(Z) for_

i 0.5 0.5 THERMAL POWER where: P =

RATED THERMAL POWER F RTP = 2.5 8 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.

2.6.2 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_2u2r02.DOC 04B 0805.1239

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 3 OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 2.6.3 FQ(Z) shall be evaluated to determine if it is within its limits by verifying that FC(Z) and F (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:

F C(Z)K< ) for P > 0.5 P

FQFc(Z)<()_

  • RTP W Fr F (Z) < Q *K(Z) for P > 0.5 Q P FW*(Z) < T 0F *K(Z) for P_< 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 P is the relative THERMAL POWER, and F _ (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 2.6.1 and W(Z) is specified in 2.6.2.

Q I COLR_2u2r02.DOC 04B 0805.1239

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 4 OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 2.7 Nuclear Enthalpy Rise Hot Channel Factor - F AH N (TS 3.2.2)

FN < FRTP, *[ + PF * (l-P)]

FAH A where:

P9 = _

THERMAL

_ _

POWER

_ _

RATED THERMAL POWER FNAH =Measured values of FN AH obtained by using the moveable incore detectors to obtain a power distribution map.

F AH RTP = 1.59 (includes the 4% measurement uncertainty)

... ....

... .. . ...PiFAH 0.3 = Powver Factor M ufIltip-lier .. . . .... . .... .. ...... .. .... .. . . . . ..

2.8 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 N, shall be calculated by the following formula:

UFAH =l.0+t U&H 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 2.7 equation).

All 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:

UFQ .0+/-+ * .o )*Ue where: UQ = Uncertainty for power peaking factor as defined in equation (5-19) in Reference 6.2.

Ue Engineering uncertainty factor

= 1.03

' N If the PDMS is inoperable, the Nuclear Enthalpy Rise Hot Channel Factor, F ANH, shall be calculated as specified in Section 2.7.

If the PDMS is inoperable, the Heat Flux Hot Channel Factor, FQ(Z), shall be calculated as specified in Section 2.6.

COLR_2u2r02.DOC 04B 0805.1239.

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 5 OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 2.9 Axial Flux Difference (TS 3.2.3) 2.9.1 The Axial Flux Difference (AFD) Limits are provided in Figure 2.

2.10 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:

2.10.1 A keff of 0.95 or less, with the most reactive control rod assembly completely withdrawn, or 2.10.2 A boron concentration of greater than or equal to 2000 ppm.

2.11 RCS Pressure and Temperature Departure from Nucleate Boiling (DNB) Limit (TS 3.4.1) 2.11.1 Pressurizer pressure is greater than or equal to 2175 psig.

2.11.2 RCS average temperature is less than or equalto 581.7°F.

NOTE: The DNBR RCS TAVG- iMiiis b-s edo- 1h-e-sligh-tly 16wer-d biihdifig-val...

associated with Unit 1 in order to have the same surveillance limits for both Unit I 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, "AFD Limits as a Function of Rated Thermal 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_2u2r02.DOC 04B 0805.1239

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE . 6, OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 Table 1: FQ Margin Decreases in Excess of 2% Per 31 EFPD Cycle Max. % Decrease Burnup 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 16-1 1--... -... -- .... ~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.

COLR_2u2r02.DOC 04B 0805.1239

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 7 OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 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 1.6042
  • 0.0000 1.5297
  • 0.2000 1.5982
  • 0.2000 1.5219
  • 0.4000 1.5885
  • 0.4000 1.5117
  • 0.6000 1.5765
  • 0.6000 1.5001
  • 0.8000 1.5621
  • 0.8000 1.4871 1.0000 1.5448 1.0000 1.4716 1.2000 1.5246 1.2000 1.4532 1.4000 1.5023 1.4000 1.4326 1....16000 ...-. J .4101 .......

1.4525 1.8000 1.8000 1.3862 1.4257 2.0000 2.0000 1.3612 2.2000 1.3977 2.2000 1.3349 2.4000 1.3691 2.4000 1.3088 1.3399 2.6000 1.2864 2.6000 2.8000 1.3092 2.8000 1.2637 3.0000 1.2844 3.0000 1.2433 3.2000 1.2705 3.2000 1.2286 3.4000 1.2626 3.4000 1.2198 3.6000 1.2528 3.6000 1.2154 3.8000 1.2430 3.8000 1.2111 4.0000 1.2356 4.0000 1.2056 4.2000 1.2291 4.2000 1.1991 4.4000 1.2209 4.4000 1.1916 4.6000 1.2118 4.6000 1.1832 4.8000 1.2017 4.8000 1.1739 5.0000 1.1907 5.0000 1.1636 5.2000 1.1791 5.2000 1.1531 5.4000 1.1667 5.4000 1.1425 5.6000 1.1545 5.6000 1.1316 5.8000 1.1594 5.8000 1.1319

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PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 8 OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 TABLE 2A: Load Follow W(Z) Factors at 150 and 4000 MWD/MTU as a Function of Core Height (Continued)

HEIGHT 150 MWD/MTU HEIGHT 4000 MWD/MTU (FEET) W(Z) (FEET) W(Z) 6.0000 1.1720 6.0000 1.1405 6.2000 1.1805 6.2000 1.1495 6.4000 1.1886 6.4000 1.1575 6.6000 1.1954 6.6000 1.1645 6.8000 1.2008 6.8000 1.1703 7.0000 1.2047 7.0000 .1.1750 7.2000 1.2069 7.2000 1.1781 7.4000 1.2073 7.4000 1.1798 7.6000--- . 1:2056-- -7.6000 1:1805--. .

7.8000 1.2017 7.8000 1.1797 8.0000 1.1955 8.0000 1.1768 8.2000 1.1869 8.2000 1.1721 8.4000 1.1758 8.4000 1.1654 8.6000 1.1622 8.6000 1.1553 8.8000 1.1460 8.8000 1.1521 9.0000 1.1280 9.0000 1.1527 9.2000 1.1136 9.2000 1.1556 9.4000 1.1094 9.4000 1.1588 9.6000 1.1075 9.6000 1.1637 9.8000 1.1057- 9.8000 1.1704 10.0000 1.1057 10.0000 1.1794 10.2000 1.1090 10.2000 1.1897 10.4000 1.1153 10.4000 1.1991 10.6000 1.1212 10.6000 1.2076 10.8000 1.1267 10.8000 1.2155 11.0000 1.1312 11.0000 "1.2213

  • 11.2000 1.1370
  • 11.2000 1.2274
  • 11.4000 1.1462
  • 11.4000 1.23771
  • 11.6000 1.1469
  • 11.6000 1.2373
  • 11.8000 1.1407
  • 11.8000 1.2317
  • 12.0000 1.1345
  • 12.0000 1.2261
  • Top and Bottom 8% excluded COLR_2u2r02.DOC 04B 0805.1239

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 9 OF: 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 Table 2B: Load Follow W(Z) Factors at 12000 and 20000 MWD/MTU as a Function of Core Height HEIGHT 12000 MWD/MTU HEIGHT 20000 MWD/MTU (FEET) W(Z) (FEET) W(Z)

  • 0.0000 1.2124
  • 0.0000 1.2866
  • 0.2000 1.2155
  • 0.2000 1.2872
  • 0.4000 1.2153
  • 0.4000 1.2840
  • 0.6000 1.2129
  • 0.6000 1.2783
  • 0.8000 1.2083
  • 0.8000 1.2699 1.0000 1.2015 1.0000 1.2589 1.2000 1.1933 1.2000 1.2462 1.4000 1.1844 1.4000 1.2329 1.6000 1.1753 1.-600-0

1-.2r94 --... -

1.8000 1.1674 1.8000 1.2059 2.0000 1.1608 2.0000 1.1920 2.2000 1.1548 2.2000 1.1792 2.4000 1.1489 2.4000 1.1702 2.6000 1.1431 2.6000 1.1653 2.8000 1.1374 2.8000 1.1608 3.0000 1.1311 3.0000 1.1555 3.2000 1.1273 3.2000 1.1566 3.4000 1.1272 3.4000 1.1678 3.6000 1.1323 3.6000 1.1783 3.8000 1.1372 3.8000 1.1874 4.0000 1.1403 4.0000 1.1947 4.2000 1.1438 4.2000 1.2019 4.4000 1.1491 4.4000 1.2110 4.6000 1.1536 4.6000 1.2178 4.8000 1.1568 4.8000 1.2225 5.0000 1.1594 5.0000 1.2259 5.2000 1.1603 5.2000 1.2264 5.4000 1.1606 5.4000 1.2263 5.6000 1.1715 5.6000 1.2357 5.8000 1.1907 5.8000

  • 1.2484
  • Top and Bottom 8% excluded

. COLR_2u2r02.DOC 04B 0805.1239

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 10 OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 Table 2B: Load Follow W(Z) Factors at 12000 and 20000 MWD/MTU as a Function of Core Height (Continued)

HEIGHT 12000 MWD/MTU HEIGHT 20000 MWD/MTU (FEET) W(Z) (FEET) W(Z) 6.0000 1.2109 6.0000 1.2595 6.2000 1.2290 6.2000 1.2688 6.4000 1.2456 6.4000 1.2761 6.6000 1.2605 6.6000 1.2814 6.8000 1.2734 6.8000 1.2844 7.0000 1.2842 7.0000 1.2852 7.2000 1.2927 7.2000 1.2841 7.4000 1.2986 7.4000 1.2808

-- 7.6000- 1.3017. .....7.6000 ... .... -..

1.2747 . . . .

7.8000 1.3020 7.8000 1.2657 8.0000 1.2993 8.0000 1.2539 8.2000 1.2937 8.2000 1.2390 8.4000 1.2850 8.4000 1.2212 8.6000 1.2720 8.6000 1.2058 8.8000 1.2637 8.8000 1.2035 9.0000 1.2614 9.0000 1.2077 9.2000 1.2600 9.2000. 1.2070 9.4000 1.2582 9.4000 1.2049 9.6000 1.2547 9.6000 1.2085 9.8000 1.2544 9.8000 1.2159 10.0,OO 1.2578 10.0000 1.2234 10.2000 1.2662 10.2000 1.2298 10.4000 1.2726 10.4000 1.2350 10.6000 1.2903 10.6000 1.2544 10.8000 1.3088 10.8000 1.2773 11.0000 1.3217 11.0000 1.2966

  • 11.2000 1.3312
  • 11.2000 1.3145
  • 11.4000 1.3340
  • 11.4000 1.3265
  • 11.6000 1.3285
  • 11.6000 1.3265
  • 11.8000 1.3069
  • 11.8000 1.3105
  • 12.0000 1.2854
  • 12.0000 1.2944
  • Top and Bottom 8% excluded COLR_2u2r02.DOC 04B 0805.1239

PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 11 OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT 2 225 200 175 150 0.

125 CL) 0 100 70 0~

CL 75 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_2u2r02.DOC 04B 0805.1239

PACIFIC GAS AND ELECTRIC COMPANY NUMBER. COLR 2 DIABLO CANYON POWER PLANT REVISION 2 PAGE 12 OF 12 TITLE: COLR for Diablo Canyon Unit 2 Cycle 15 UNIT .2 120

- (-14,10) F(+10,100)-

UNACCEPTABLE - - UNACCEPTABLE 100 OPERATION LOPERATION 80 ACCEPTABLE 0

60 0 I(-30,50) f(+-25,5-01) 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_2u2r02.DOC 04B 0805.1239

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