DCL-03-075, Core Operating Limits Report Cycle 12
ML032130533 | |
Person / Time | |
---|---|
Site: | Diablo Canyon ![]() |
Issue date: | 06/20/2003 |
From: | Oatley D Pacific Gas & Electric Co |
To: | Document Control Desk, Office of Nuclear Reactor Regulation |
References | |
DCL-03-075, OL-DPR-82 | |
Download: ML032130533 (17) | |
Text
Pacic Gas and
.an Electric Company David H.Oatley Diablo Canyon Power Plant Vice President and PO. Box 56 General Manager Avila Beach, CA 93424 June 20, 2003 805.545.4350 Fax: 805.545.4234 PG&E Letter DCL-03-075 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 Operatina Limits Report for Unit 2 Cycle 12
Dear Commissioners and Staff:
In accordance with Diablo Canyon Power Plant Technical Specification 5.6.5.d, enclosed is revision 2 of the Core Operating Limits Report for Diablo Canyon Unit 2 Cycle 12. These revisions incorporate changes made following the Unit 2 eleventh refueling outage and subsequent startup.
Sincerely, Sag/V t David H. Oatley ddm12254 cc/enc: Edgar Bailey, DHS Thomas P. Gwynn David H. Jaffe William B. Jones David L. Proulx cc: Diablo Distribution 4o0I A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway
- Comanche Peak
- Diablo Canyon
- Palo Verde
- South Texas Project
- Wolf Creek
Enclosure PG&E Letter DCL-03-075 CORE OPERATING LIMITS REPORT (COLR)
DIABLO CANYON POWER PLANT UNIT 2, CYCLE 12, REVISION 2 (15 Pages)
EFFECTIVE DATE MAY 21, 2003
- ISSUED FOR USE BY:_ DA TE: EXPIRES:____
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 NUCLEAR POWER GENERATION REVISION 2 DIABLO CANYON POWER PLANT PAGE 1 OF 15 CORE OPERATING LIMITS REPORT UNIT TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 2 05/21/03 EFFECTIVE DATE
- 1. CORE OPERATING LIMITS REPORT This Core Operating Limits Report (COLR) for Diablo Canyon Unit 2 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 kff < 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 - FAHN 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 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.
2.2 Shutdown Margin (SDM) for MODE 1 and MODE 2 with kff > 1.0 is:
2.2.1 The shutdown margin shall be greater than or equal to 1.6% Ak/k.
7EPBFMO2.DOA 04B
- PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 2 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 UNIT 2 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/ 0 F for all rods withdrawn, end of cycle life (EOL), RATED THERMAL POWER condition.
The 300 ppm Surveillance limit is:
2.3.2 The MTC 300 ppm surveillance limit is -3.0x104 Ak/k/0 F (all rods withdrawn, RATED THERMAL POWER condition).
The 60 ppm Surveillance limit is:
2.3.3 The MTC 60 ppm surveillance limit is -3.72x10 4 Ak/k/0 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)
RTP 2.6.1 FQ(Z) < Fo
- K(Z) for P > 0.5 RTP FQ(Z)
- Fo
- K(Z) for P
- 0.5 THERMAL POWER where: RATED THERMAL POWER FQRTP = 2.45 K(Z)= 1.0.
2.6.2 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 12 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.
7EPBFMO2.DOA 04B
- PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 3 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 UNIT 2 2.6.3 FQ(Z) shall be evaluated to determine if it is within its limits by verifying that FQ (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:
RTP FQC(Z) < Fo *K(Z) for P > 0.5 Q P F c(Z) < ;°R
- K(Z) for P < 0.5 rRTP FQW(Z) < P
- K(Z) for P > 0.5 FQW(Z) 0.5
- K(Z) for P < 0.5 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 nornalized 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.
FQRTP and K(Z) are specified in 2.6.1 and W(Z) is specified in 2.6.2.
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.
2.7 Nuclear Enthalpy Rise Hot Channel Factor (TS 3.2.2)
FaHN FRTP *[1 + PFai * (l-P)]
where:
THERMAL POWER
- RATED THERMAL POWER FAHN= Measured values of FAHN obtained by using the moveable incore detectors to obtain a power distribution map.
FAHRTP= 1.59 PFAH = 0.3 7EPBFM02.DOA 04B
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 4 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 UNIT 2 2.8 Axial Flux Difference (TS 3.2.3) 2.8.1 The Axial Flux Difference (AFD) Limits are provided in Figure 6.
2.9 Boron Concentration (TS 3.9.1)
The refueling boron concentration of the Reactor Coolant System, the refueling canal, and the refueling cavity shall be maintained within the more restrictive of the following limits:
2.9.1 A keff of 0.95 or less, with the most reactive control rod assembly completely withdrawn, or 2.9.2 A boron concentration of greater than or equal to 2000 ppm.
- 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 Evaluation for Diablo Canyon Power Plant Unit 2 Cycle 12, dated February 2003.
- 7. SPONSOR Ken Kargol 7EPBFMO2.DOA 04B
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 5 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 UNIT 2 TABLE 1: FQ Margin Decreases in Excess of 2% Per 31 EFPD Cycle Burnup (MWD/MTU) Max % Decrease In FQ Margin 150 2.00 313 2.31 475 2.59 638 2.83 801 2.98 964 3.00 1126 2.89 1289 2.69 1452 2.41 1615 2.10 1777 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 bumups.
7EPBFMO2.DOA 04B
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 6 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 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 1.0000 *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 1.2453 2.0000 1.2782 2.2000 1.2333 2.2000 1.2563 2.4000 1.2211 2.4000 1.2340 2.6000 1.2087 2.6000 1.2117 2.8000 1.1953 2.8000 1.1888 3.0000 1.1852 3.0000 1.1700 3.2000 1.1794 3.2000 1.1587 3.4000 1.1751 3.4000 1.1524 3.6000 1.1706 3.6000 1.1468 3.8000 1.1681 3.8000 1.1462 4.0000 1.1652 4.0000 1.1462 4.2000 1.1620 4.2000 1.1450 4.4000 1.1605 4.4000 1.1432 4.6000 1.1580 4.6000 1.1407 4.8000 1.1547 4.8000 1.1375 5.0000 1.1504 5.0000 1.1336 5.2000 1.1471 5.2000 1.1293 5.4000 1.1475 5.4000 1.1242 5.6000 1.1583 5.6000 1.1192 5.8000 1.1701 5.8000 1.1258 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 7EPBFMO2.DOA 04B
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 7 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 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 1.1823 6.0000 1.1412 6.2000 1.1969 6.2000 1.1531 6.4000 1.2114 6.4000 1.1648 6.6000 1.2246 6.6000 1.1756 6.8000 1.2362 6.8000 1.1851 7.0000 1.2461 7.0000 1.1935 7.2000 1.2540 7.2000 1.2003 7.4000 1.2599 7.4000 1.2055 7.6000 1.2633 7.6000 1.2096 7.8000 1.2641 7.8000 1.2121 8.0000 1.2622 8.0000 1.2123 8.2000 1.2575 8.2000 1.2105 8.4000 1.2498 8.4000 1.2064 8.6000 1.2382 8.6000 1.1988 8.8000 1.2283 8.8000 1.1980 9.0000 1.2183 9.0000 1.2040 9.2000 1.2089 9.2000 1.2193 9.4000 1.2096 9.4000 1.2320 9.6000 1.2181 9.6000 1.2455 9.8000 1.2286 9.8000 1.2596 10.0000 1.2369 10.0000 1.2730
- 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
- I 1.0000 1.0000 *1 1.0000 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 150 and 4000 MWD/MTU are plotted in COLR Figures 2 and 3, respectively.
- Top and Bottom 15% Excluded 7EPBFMO2.DOA 04B
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 8 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 UNIT 2 TABLE 2B: Load Follow W(Z) Factors at 12000 and 22000 MWDIMTU 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 1.2382 2.0000 1.2133 2.2000 1.2256 2.2000 1.1982 2.4000 1.2128 2.4000 1.1827 2.6000 1.1999 2.6000 1.1669 2.8000 1.1854 2.8000 1.1549 3.0000 1.1774 3.0000 1.1566 3.2000 1.1761 3.2000 1.1673 3.4000 1.1740 3.4000 1.1747 3.6000 1.1707 3.6000 1.1810 3.8000 1.1706 3.8000 1.1891 4.0000 1.1713 4.0000 1.1985 4.2000 1.1706 4.2000 1.2073 4.4000 1.1690 4.4000 1.2139 4.6000 1.1663 4.6000 1.2186 4.8000 1.1626 4.8000 1.2220 5.0000 1.1577 5.0000 1.2222 5.2000 1.1523 5.2000 1.2241 5.4000 1.1505 5.4000 1.2411 5.6000 1.1580 5.6000 1.2625 5.8000 1.1686 5.8000 1.2822 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 7EPBFMO2.DOA 04B
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 9 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 UNIT 2 TABLE 2B: Load Follow W(Z) Factors at 12000 and 22000 MWD/MTU as a Function of Core Height (Continued)
HEIGHT 12000 MWD/MTU HEIGHT 22000 MWD/MTU (FEET) W(Z) (FEET) W(Z) 6.0000 1.1795 6.0000 1.2994 6.2000 1.1905 6.2000 1.3143 6.4000 1.1999 6.4000 1.3269 6.6000 1.2079 6.6000 1.3369 6.8000 1.2145 6.8000 1.3442 7.0000 1.2193 7.0000 1.3486 7.2000 1.2225 7.2000 1.3500 7.4000 1.2246 7.4000 1.3481 7.6000 1.2247 7.6000 1.3429 7.8000 1.2228 7.8000 1.3341 8.0000 1.2185 8.0000 1.3218 8.2000 1.2121 8.2000 1.3059 8.4000 1.2035 8.4000 1.2866 8.6000 1.1918 8.6000 1.2661 8.8000 1.1880 8.8000 1.2419 9.0000 1.1890 9.0000 1.2258 9.2000 1.1936 9.2000 1.2210 9.4000 1.1961 9.4000 1.2108 9.6000 1.1974 9.6000 1.2129 9.8000 1.1954 9.8000 1.2184 10.0000 1.1961 10.0000 1.2210
- 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 7EPBFMO2.DOA 04B
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 10 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 UNIT 2 225
,/ (0.583,225) - -----
200
........ --- -- -- -- -- ----- -- -- -- -- - -- -- I -- -- - --- -- -- - -
175 -- - -- - -- - I--- - -- - -- -- 0 1_
4 . .. . . ..-R - ---- - - -- --_,- -- -- .1. _ ___
3 150
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.. .. . - . - --. - - -- --7 . . ...
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IL f~~~~~~~~~~~~~~~~~~~~~~ ---- --;---- -- ---- -----....
c m 75 50 :(o1~~~~~~~~~~~~~~~~~~~~~~~~~ 380)- ~~~~
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1 / _=::::: 1' :1:- 1::::'D 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 7EPBFMO2.DOA 04B
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 11 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 UNIT 2 1.4 1.3 N
3: 1.2
-5 0
M 1.1 I
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 7EPBFMO2.DOA 04B
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 12 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 UNIT 2 1.4 _-
1.3 -. 0
- _ = - --
- 1. _ 7i
. _ __l__ _ _ .IL_
1.1
- __ _ __ __
1- l4- I- ,, L _ I- .I-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 7EPBFMO2.DOA 04B
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 13 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 UNIT 2 1.4 -.
1.3 - ----
L1.I X 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 7EPBFMO2.DOA 04B
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 14 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 UNIT 2 1.4 1.3 N
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 7EPBFMO2.DOA 04B
PACIFIC GAS AND ELECTRIC COMPANY NUMBER COLR 2-12 DIABLO CANYON POWER PLANT REVISION 2 PAGE 15 OF 15 TITLE: COLR for Diablo Canyon Unit 2 Cycle 12 UNIT 2 120 100 80 N.
S l-W 60 ED1-0 40 20 0
50 40 -30 -20 -10 0 10 20 30 40 50 60 Flux Difference (DELTA 1)%
FIGURE 6: AFD Limits as a Function of Rated Thermal Power 7EPBFMO2.DOA 04B