DCL-07-090, Core Operating Limits Report
| ML072710571 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 09/14/2007 |
| From: | Becker J Pacific Gas & Electric Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| DCL-07-090 | |
| Download: ML072710571 (27) | |
Text
Pacific Gas and Electric Company' James R. Becker Vice President Diablo Canyon Operations and Station Director Diablo Canyon Power Plant P. 0. Box 56 Avila Beach, CA 93424 805.545.3462 Fax: 805.545.4234 September 14, 2007 PG&E Letter DCL-07-090 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 Oneratina 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 Units 1 and 2. The COLR has been revised consistent with the NRC approved License Amendment Numbers 195 and 196 for Units 1 and 2, respectively.
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, J
s ecker ddm/2254/A0686045 Enclosures cc:
Diablo Distribution.
cc/enc:
Michael A. Brown, NRC Resident Inspector Elmo E. Collins, NRC Region IV Alan B. Wang, NRR Project Manager A001 A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway
- Comanche Peak
- Diablo Canyon
- Palo Verde
- South Texas Project e Wolf Creek AJjKi PG&E Letter DCL-07-090 CORE OPERATING LIMITS REPORT (COLR)
DIABLO CANYON POWER PLANT UNIT 1 EFFECTIVE DATE AUGUST 15, 2007
- ISSUED FOR USE BY:
PACIFIC GAS AND ELECTRIC COMPANY NUCLEAR POWER GENERATION DIABLO CANYON POWER PLANT CORE OPERATING LIMITS REPORT DA TE:
EXPIRES:____
NUMBER COLR 1 REVISION 0
PAGE 1 OF 12 UNIT TITLE:
COLR forr Diablo Canyon Unit 1 Cycle 15 EFFECTIVE DATE PROCEDURE CLASSIFICATION: QUALITY RELATED I.
CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for Diablo Canyon Unit 1 Cycle 15 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 klff < 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 3.2.1
- Heat Flux Hot Channel Factor - FQ(Z) 3.2.2
- Nuclear Enthalpy Rise Hot Channel Factor - F N Al 3.2.3
- Axial Flux Difference - (AFD) 3.4.1
- 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)
The SDM limit for MODE 2 with klff < 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.
FIOUUCOO.doa 04B 0731.1212
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1 DIABLO CANYON POWER PLANT REVISION 0
PAGE 2 OF 12 TITLE:
COLR for Diablo Canyon Unit 1 Cycle 15 UNIT 1
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 -3.9x 104 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.Ox10"4 Ak/k/0F (all rods withdrawn, RATED THERMAL POWER condition).
2.3.3 The MTC 60 ppm surveillance limit is -3.72x104 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)
FR 2.6.1 FQ,(Z)<N
- K(Z) forP>0.5 P
F RTP FQ(Z)< 0.5 *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.
2.6.2 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.
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PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1 DIABLO CANYON POWER PLANT REVISION 0
PAGE 3 OF 12 TITLE:
COLR for Diablo Canyon Unit 1 Cycle 15 UNIT 1
2.6.3 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:
FTP *K(Z)
F (Z)<
KZfor P f>
0.5 Q
P F C, (Z):5 for P:!ý 0.5 Q
0.5 W
F R1?
F (Z) <* Q *K(Z) for P > 0.5 Q
P F
(Z):_.5 Q*K(Z) for P*5 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, F (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.
FR TP and K(Z) are specified in 2.6.1 and W(Z) is specified in 2.6.2.
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PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 1 DIABLO CANYON POWER PLANT REVISION 0
PAGE 4 OF 12 TITLE:
COLR for Diablo Canyon Unit 1 Cycle 15 UNIT 1
2.7 Nuclear Enthalpy Rise Hot Channel Factor - F_ (TS 3.2.2)
F(rN3.FR2)
FN < FRTP *[I + PFH * (l-P)]
where:
P THERMAL POWER RATED THERMAL POWER FAN
= Measured values of F N obtained by using the moveable incore detectors to AH All obtain a power distribution map.
FRTP 1.59 (includes the 4% measurement uncertainty)
FAH PFm
= 0.3 = Power Factor Multiplier 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, UFWH, to be applied to the Nuclear Enthalpy Rise Hot Channel Factor, F N- ' shall be
- UFAH, calculated by the following formula:
UFtA=1.O+ UAH 100.0 where: Um = 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).
A.H 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:
U FQ 10+ UQ "*,
100.0 where:
UQ = Uncertainty for power peaking factor as defined in equation (5-19) in Reference 6.2.
U= Engineering uncertainty factor
= 1.03 If the PDMS is inoperable, the Nuclear Enthalpy Rise Hot Channel Factor, F N, 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.
FIOUUCOO.doa 04B 0731.1212
PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 1 Cycle 15 NUMBER REVISION PAGE UNIT COLR 1 0
5 OF 12 1
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) Limits 2.11.1 Pressurizer pressure is greater than or equal to 2175 psig.
2.11.2 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 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 5,000 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, FAID Limits as a k unction or Katec I hermal Power."
- 5.
RECORDS None
- 6.
REFERENCES 6.1 "Diablo Canyon Unit I Cycle 15 Final Reload Evaluation, Revision 1,"
May, 2007.
6.2 WCAP-12473-A (Non-Proprietary), "BEACON Core Monitoring and Operations Support System," August, 1994.
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PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 1 Cycle 15 NUMBER REVISION PAGE COLR 1 0
6 OF 12 1
UNIT TABLE 1: FQ Margin Decreases in Excess of 2% Per 31 EFPD Cycle Max. % Decrease Burnup in FQ Margin (MWD/MTU) 0 2.05 150 2.05 313 2.32 475 2.56 638 2.76 801 2.88 963 2.93 1126 2.88 1289 2.75 1451 2.54 1614 2.26 1777 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 Cycle 15 NUMBER REVISION PAGE UNIT COLR 1 0
7 OF 12 1
TABLE 2A: Load Follow W(Z) Factors at 150 and 5000 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) 1.4014 1.3937 1.3843 1.3740 1.3628 1.3496 1.3340 1.3168 1.2986 1.2795 1.2597 1.2396 1.2190 1.1983 1.1827 1.1747 1.1713 1.1672 1.1620 1.1592 1.1582 1.1571 1.1551 1.1524 1.1489 1.1451 1.1396 1.1347 1.1412 1.1530 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 5000 MWD/MTU W(Z) 1.4209 1.4182 1.4120 1.4037 1.3930 1.3797 1.3637 1.3456 1.3259 1.3048 1.2829 1.2602 1.2373 1.2145 1.1908 1.1739 1.1643 1.1582 1.1587 1.1587 1.1575 1.1558 1.1533 1.1499 1.1459 1.1410 1.1357 1.1296 1.1219 1.1228
- Top and Bottom 8% Excluded FIOUUCOO.doa 04B 0731.1212
PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 1 Cycle 15 NUMBER COLR 1 REVISION 0 PAGE 8 OF 12 UNIT 1
TABLE 2A: Load Follow W(Z) Factors at 150 and 5000 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) 1.1670 1.1824 1.1964 1.2091 1.2205 1.2302 1.2382 1.2446 1.2488 1.2505 1.2493 1.2454 1.2384 1.2275 1.2184 1.2205 1.2350 1.2513 1.2677 1.2846 1.3001 1.3103 1.3150 1.3250 1.3434 1.3594 1.3649 1.3685 1.3611 1.3412 1.3243 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 5000 MWD/MTU W(Z) 1.1343 1.1507 1.1664 1.1810 1.1945 1.2064 1.2169 1.2259 1.2329 1.2376 1.2399 1.2395 1.2362 1.2294 1.2252 1.2274 1.2455 1.2662 1.2865 1.3058 1.3230 1.3360 1.3439 1.3513 1.3606 1.3640 1.3611 1.3690 1.3686 1.3562 1.3468
(
- Top and Bottom 8% Excluded FIOUUCOO.doa 04B 0731.1212
PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 1 Cycle 15 NUMBER COLR 1 REVISION 0 PAGE 9 OF 12 UNIT 1
TABLE 2B: Load Follow W(Z) Factors at 12000 and 22000 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) 1.3147 1.3129 1.3112 1.3095 1.3047 1.2972 1.2877 1.2771 1.2658 1.2538 1.2413 1.2284 1.2151 1.2018 1.1869 1.1799 1.1789 1.1761 1.1770 1.1785 1.1796 1.1797 1.1789 1.1771 1.1742 1.1708 1.1651 1.1614 1.1751 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 22000 MWD/MTU W(Z) 1.3623 1.3513 1.3404 1.3303 1.3214 1.3104 1.2970 1.2828 1.2683 1.2535 1.2383 1.2229 1.2071 1.1911 1.1740 1.1599 1.1591 1.1738 1.1882 1.2013 1.2130 1.2229 1.2308 1.2367 1.2412 1.2432 1.2482 1.2716 1.2930 1.3114
- Top and Bottom 8% Excluded F1OUUCOO.doa 04B 0731.1212
PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 1 Cycle 15 NUMBER COLR1 REVISION 0 PAGE 10 OF 12 UNIT 1
TABLE 2B:
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 Load Follow W(Z) Factors at 12000 and 22000 MWD/MTU as a Function of Core Height (Continued) 12000 MWD/MTU W(Z) 1.2028 1.2143 1.2239 1.2317 1.2375 1.2414 1.2436 1.2434 1.2407 1.2354 1.2274 1.2166 1.2041 1.1939 1.1857 1.1868 1.2042 1.2312 1.2563 1.2788 1.3003 1.3201 1.3377 1.3525 1.3660 1.3737 1.3729 1.3699 1.3559 1.3296 1.3062 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 22000 MWD/MTU W(Z) 1.3277 1.3411 1.3518 1.3596 1.3641 1.3657 1.3643 1.3593 1.3506 1.3379 1.3213 1.3008 1.2765 1.2513 1.2399 1.2364 1.2294 1.2278 1.2375 1.2581 1.2807 1.3012 1.3205 1.3382 1.3553 1.3676 1.3723 1.3746 1.3642 1.3399 1.3188
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PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 1 Cycle 15 NUMBER COLR 1 REVISION 0 PAGE 11 OF 12 UNIT 1
225 200 175 (0.ý17,2ý25)
- BANK J
(0.68,225) ---------
I i
I i
I I
I I
.(1.0, 177)
CO) 0.
0 0.
0ýg
'U N....... C......
150 125 100 75 I
X
/
I I ------ -
I -------------
I ------ ------ - --- ------
I -------
--- -I -------
(0.0 5 5 )
I.....
I -------
I -------
I 4 ------ ------
B A N K D L-.........
7 ------
I.......... -----
j ------- -----........................ ------
L ----- -
j ------- --------------
I ----- ------ ----- -------
L.
......... ------ - Valid for Fully Withdrawn Rod (0.
L.....
-Steps And <231 Steps Positions: >225 29 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 FIOUTUCOO.doa 04B 0731.1212
PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 1 Cycle 15 NUMBER COLR1 REVISION 0
PAGE 12 OF 12 UNIT I
120 100 0
a-a) 80 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 FlL0UUCOO.doa 04B 0731.1212 PG&E Letter DCL-07-090 CORE OPERATING LIMITS REPORT (COLR)
DIABLO CANYON POWER PLANT UNIT 2 EFFECTIVE DATE AUGUST 15, 2007
- ISSUED FOR USE BY:
DATE:
PACIFIC GAS AND ELECTRIC COMPANY NUCLEAR POWER GENERATION DIABLO CANYON POWER PLANT CORE OPERATING LIMITS REPORT TITLE:
COLR for Diablo Canyon Unit 2 Cycle 14 EXPIRES:____
NUMBER COLR2 REVISION 0
PAGE 1 OF 12 UNIT 2
EFFECTIVE DATE PROCEDURE CLASSIFICATION: QUALITY RELATED
- 1.
CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for Diablo Canyon Unit 2 Cycle 14 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 klff < 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 3.2.1
- 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) 3.4.1
- 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)
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.
D7KIC000.doa 04B 07121 0731.1211
PACIFIC GAS AND ELECTRIC COMPANY NUM1BER COLR 2 DIABLO CANYON POWER PLANT REVISION 0 PAGE 2 OF 12 TITLE:
COLR for Diablo Canyon Unit 2 Cycle 14 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 keff > 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 -3.9x10- 4 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 -3.0x104 Ak/k/°F (all rods withdrawn, RATED THERMAL POWER condition).
2.3.3 The MTC 60 ppm surveillance limit is -3.72x104 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)
F RTP 2.6.1 FQ(Z)< a
- K(Z) for P > 0.5 FRP Fo (Z)< 0.5*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.
2.6.2 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 14 burmups 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.
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PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 0
PAGE 3 OF 12 TITLE:
COLR for Diablo Canyon Unit 2 Cycle 14 UNIT 2
2.6.3 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:
F (Z) < FQRP for P > 0.5 Q
P F C (Z)<Q for P_< 0.5 Q
0.5 W
ERT F
(Z) < Q *K(Z) for P > 0.5 Q
P FRTP F W (Z):!-*Q
- K(Z) for P < 0.5 Q 0.5*K) 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 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 2.6.1 and W(Z) is specified in 2.6.2.
Q D7K1CO00.doa 04B 0731.1211
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 0 PAGE 4 OF 12 TITLE:
COLR for Diablo Canyon Unit 2 Cycle 14 UNIT 2
2.7 Nuclear Enthalpy Rise Hot Channel Factor - F M (TS 3.2.2)
FN
< -FAIRTP
,*[ I+ PF, * (l-P)]
where:
THERMAL POWER RATED THERMAL POWER F AHN
= Measured values of F N obtained by using the moveable incore detectors to obtain a power distribution map.
FRRTP
= 1.59 (includes the 4% measurement uncertainty)
AH PFAH
= 0.3 = Power Factor Multiplier 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, UFA, to be applied to the Nuclear Enthalpy Rise Hot Channel Factor, F N- ' shall be calculated by the following formula:
U F A = 1.0- 1 U 10+.
where: UAH = Uncertainty for enthalpy rise as defined in equation (5-19) in Reference 6.2 andFIRTP = 1.65 for PDMS (in the above Section 2.7 equation).
AH 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:
U FQ.0 + U Q )
- U UfQ.0100.0JU 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 N, 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.
D7K1CO00.doa 04B 0731.1211
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2 DIABLO CANYON POWER PLANT REVISION 0
PAGE 5 OF 12 TITLE:
COLR for Diablo Canyon Unit 2 Cycle 14 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 klff 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) Limits
.2.11.1 Pressurizer pressure is greater than or equal to 2175 psig.
2.11.2 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 5,000 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, "AFD Limits as a Function of Rated Thermal Power."
- 5.
RECORDS None
- 6.
REFERENCES 6.1 NF-PGE-06-9, "Diablo Canyon Unit 2 Cycle 14 Final Reload Evaluation, Revision 1,"
March, 2006.
6.2 WCAP-12473-A (Non-Proprietary), "BEACON Core Monitoring and Operations Support System," August, 1994.
D7K ICO00.doa 04B 0731.1211
PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 2 Cycle 14 NUMBER REVISION PAGE COLR 2 0
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) 0 2.34 150 2.34 313 2.61 475 2.86 638 3.04 800 3.16 963 3.21 1126 3.18 1288 3.07 1451 2.89 1614 2.64 1776 2.32 1939 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.
D7KICO00.doa 04B 0731.1211
PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 2 Cycle 14 NUMBER COLR2 REVISION 0
PAGE 7 OF 12 UNIT 2
TABLE 2A: Load Follow W(Z) Factors at 150 and 5000 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) 1.4943 1.4891 1.4809 1.4708 1.4588 1.4444 1.4277 1.4092 1.3894 1.3685 1.3466 1.3239 1.3006 1.2768 1.2528 1.2286 1.2107 1.2047 1.2036 1.2018 1.1988 1.1948 1.1897 1.1837 1.1768 1.1693 1.1603 1.1514 1.1527 1.1611 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 5000 MWD/MTU W(Z) 1.4635 1.4591 1.4512 1.4412 1.4291 1.4142 1.3965 1.3766 1.3548 1.3316 1.3073 1.2822 1.2567 1.2310 1.2057 1.1851 1.1718 1.1646 1.1623 1.1612 1.1595 1.1570 1.1537 1.1496 1.1448 1.1391 1.1332 1.1264 1.1171 1.1237
- Top and Bottom 8% excluded.
D7K1CO00.doa 04B 0731.1211
PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 2 Cycle 14 NUMBER COLR2 REVISION 0
PAGE 8 OF 12 UNIT 2
(
TABLE 2A: Load Follow W(Z) Factors at 150 and 5000 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) 1.1710 1.1798 1.1875 1.1940 1.1998 1.2058 1.2117 1.2156 1.2175 1.2174 1.2149 1.2100 1.2027 1.1927 1.1806 1.1687 1.1616 1.1614 1.1633 1.1644 1.1609 1.1560 1.1610 1.1747 1.1916 1.2045 1.2148 1.2245 1.2258 1.2189 1.2119 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 5000 MWD/MTU W(Z) 1.1406 1.1566 1.1718 1.1860 1.1990 1.2106 1.2206 1.2289 1.2352 1.2394 1.2412 1.2406 1.2374 1.2305 1.2266 1.2270 1.2296 1.2413 1.2527 1.2596 1.2696 1.2871 1.3024 1.3161 1.3292 1.3385 1.3436 1.3489 1.3469 1.3414 1.3358
- Top and Bottom 8% excluded.
D7KICO00.doa 04B 0731.1211
PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 2 Cycle 14 NUMBER COLR2 REVISION 0 PAGE 9 OF 12 UNIT 2
TABLE 2B: Load Follow W(Z) Factors at 12000 and 22000 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) 1.2534 1.2518 1.2501 1.2484 1.2441 1.2374 1.2290 1.2198 1.2100 1.1999 1.1892 1.1792 1.1715 1.1654 1.1596 1.1526 1.1483 1.1477 1.1495 1.1506 1.1529 1.1560 1.1579 1.1588 1.1589 1.1576 1.1570 1.1596 1.1710 1.1853 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 22000 MWD/MTU W(Z) 1.3253 1.3259 1.3224 1.3164 1.3077 1.2963 1.2831 1.2691 1.2550 1.2407 1.2261 1.2118 1.1989 1.1869 1.1750 1.1615 1.1559 1.1648 1.1743 1.1860 1.1986 1.2098 1.2192 1.2266 1.2322 1.2355 1.2376 1.2450 1.2671 1.2894
- Top and Bottom 8% excluded.
D7K1CO00.doa 04B 0731.1211
PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 2 Cycle 14 NUMBER COLR 2 REVISION 0
PAGE 10 OF 12 UNIT 2
TABLE 2B: Load Follow W(Z) Factors at 12000 and 22000 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 0.6000 10.8000 11.0000
- 11.2000
- 11.4000
- 11.6000
- 11.8000
- 12.0000 12000 MWD/MTU W(Z) 1.2002 1.2154 1.2287 1.2402 1.2500 1.2576 1.2632 1.2673 1.2692 1.2686 1.2654 1.2596 1.2510 1.2398 1.2260 1.2175 1.2167 1.2151 1.2204 1.2280 1.2332 1.2374 1.2400 1.2431 1.2471 1.2489 1.2483 1.2472 1.2379 1.2293 1.2206 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 22000 MWD/MTU W(Z) 1.3078 1.3243 1.3381 1.3492 1.3574 1.3626 1.3645 1.3630 1.3580 1.3492 1.3367 1.3206 1.3008 1.2778 1.2506 1.2240 1.2078 1.2050 1.2006 1.1970 1.2024 1.2326 1.2636 1.2921 1.3116 1.3227 1.3324 1.3396 1.3329 1.3101 1.2872
- Top and Bottom 8% excluded.
D7K1CO00.doa 04B 0731.1211
PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 2 Cycle 14 NUMBER COLR 2 REVISION 0 PAGE 11 OF 12 UNIT 2
(U I-0.
U) 0 0~
a-J&l 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 D7KICOOO.doa 04B 07.21 0731.1211
PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT TITLE:
COLR for Diablo Canyon Unit 2 Cycle 14 NUMBER COLR2 REVISION 0
PAGE 12 OF 12 UNIT 2
120 100 I-U) 00.
I-U)
(U
'4-0 80 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 DTK1CO00.doa 04B 0731.1211