ML033290452

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Cycle 10 Core Operating Limits Report
ML033290452
Person / Time
Site: Seabrook NextEra Energy icon.png
Issue date: 11/17/2003
From: Peschel J
Florida Power & Light Energy Seabrook
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
NYN-03097
Download: ML033290452 (19)
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Text

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FPL Energy Seabrook Station FPL Energy P.O. Box 300 Seabrook, NH 03874 Seabrook Station 1603) 773-7000 NOV I 7 2003 Docket No. 50-443 NYN-03097 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555 - 0001 Seabrook Station Cycle 10 Core Operating Limits Report FPL Energy Seabrook, LLC (FPLE Seabrook) is enclosing the Cycle 10 Core Operating Limits Report (COLR) for Seabrook Station pursuant to Technical Specification 6.8.1.6.c. Cycle 10 operation of Seabrook Station commenced on October 26, 2003.

Should you require further information regarding this report, please contact Mr. Paul V. Gurney, Reactor Engineering Manager at (603) 773-7776.

Very truly yours, FPL ENERGY SEABROOK, LLC

/ Jads M.Peschel eg latory Programs Manager cc: H. J. Miller, NRC Region I Administrator V. Nerses, NRC Project Manager, Project Directorate I-2 G. T. Dentel, NRC Senior Resident Inspector an FPL Group company

ENCLOSURE TO NYN-03097 C

RE-21 Rev. 01-10-00 Page 1 of 17 CORE OPERATING LIMITS REPORT SEABROOK STATION CYCLE 10 COLR June 2003 RE Supervisor 1W-3~~~~~~~~~~~~~~~~~~~~~

Operations Manager agi,

  • iaFUJ  : iA Si ature Date

RE-21 Rev. 01-10-00 Page 2 of 17 1.0 Core Operating Limits Report This Core Operating Limits Report for Seabrook Station Unit 1, Cycle 10 has been prepared in accordance with the requirements of Technical Specification 6.8.1.6.

The Technical Specifications affected by this report are:

1) 2.2.1 Limiting Safety System Settings
2) 3.1.1.1 Shutdown Margin Limit for MODES 1, 2, 3, 4
3) 3.1.1.2 Shutdown Margin Limit for MODE 5
4) 3.1.1.3 Moderator Temperature Coefficient
5) 3.1.3.5 Shutdown Rod Insertion Limit
6) 3.1.3.6 Control Rod Insertion Limits
7) 3.2.1 Axial Flux Difference
8) 3.2.2 Heat Flux Hot Channel Factor
9) 3.2.3 Nuclear Enthalpy Rise Hot Channel Factor 2.0 Operating Limits The cycle-specific parameter limits for the specifications listed in Section 1.0 are presented in the following subsections. These limits have been developed using the NRC-approved methodologies specified in Technical Specification 6.8.1.6.

2.1 Limiting Safety System Settings: (Specification 2.2.1) 2.1.1 Cycle Dependent Overtemperature AT Trip Setpoint Parameters and Function Modifier:

2.1.1.1 K1 =1.180 2.1.1.2 K2 = 0.021/ F 2.1.1.3 K3 = 0.0011 / psig T = Measured RCS Tag (0F ), and T' = Indicated RCS Tg at RATED THERMAL POWER (Calibration temperature for AT instrumentation, < 588.5 0F ).

P' = Nominal RCS operating pressure, 2235 psig

RE-21 Rev. 01-10-00 Page 3 of 17 2.1.1.4 Channel Total Allowance (TA) = N.A.

2.1.1.5 Channel Z = N.A.

2.1.1.6 Channel Sensor Error (S)=N.A.

2.1.1.7 Allowable Value - The channel's maximum Trip Setpoint shall not exceed its computed Trip Setpoint by more than 0.5% of AT span. Note that 0.5% of AT span is applicable to OTAT input channels AT, Tavg and Pressurizer Pressure; 0.25% of AT span is applicable to AI.

2.1.1.8 f 1(AI) is a function of the indicated difference between top and bottom detectors of the power-range neutron ion chambers; with nominal gains to be selected based on measured instrument response during plant startup tests calibrations such that:

(1) For q, - q betveen -20% and +4%, f(AI) 2 0; where q and q are percent RATED THERMAL POWER in the upper and lower halves of the core, respectively, and q, + qb is the total THERMAL POWER in percent RATED THERMAL POWER; (2) For each percent that the magnitude of q, - q exceeds -20%, the AT Trip Setpoint shall be automatically reduced by 2 3.1% of its value at RATED THERMAL POWER.

(3) For each percent that the magnitude of q, - q exceeds +4%, the AT Trip Setpoint shall be automatically reduced by 2 2.44% of its value at RATED THERMAL POWER.

See Figure 5.

2.1.1.9 Ti 2 8 seconds 2.1.1.10 T2 3 seconds 2.1.1.11 ¶3 = Oseconds 2.1.1.12 14Ž 33 seconds 2.1.1.13 5

  • 4 seconds 2.1.1.14 6 = Oseconds

RE-21 Rev. 01-10-00 Page 4 of 17 2.1.2 Cycle Dependent Overpower AT Trip Setpoint Parameters and Function Modifier:

2.1.2.1 K4 = 1.121 2.1.2.2 K5 = 0.020 / F for increasing average temperature and K = 0.0 for decreasing average temperature.

2.1.2.3 K6 = 0.00175 / IF for T > T" and K6 = 0.0 for T 5 T", where:

T = Measured Tag (IF ), and T" = Indicated Ta., at RATED THERMAL POWER (Calibration temperature for AT instrumentation, 5 587.5 0F).

2.1.2.4 Channel Total Allowance (TA) = N.A.

2.1.2.5 Channel Z = N.A.

2.1.2.6 Channel Sensor Error (S) =N.A.

2.1.2.7 Allowable Value - The channel's maximum Trip Setpoint shall not exceed its computed Trip Setpoint by more than 0.5% of AT span. Note that 0.5% of AT span is applicable to OPAT input channels AT and Tag.

2.1.2.8 f2(AI) is disabled.

2.1.2.9 -rl as defined in 2.1.1.9, above.

2.1.2.10 T2 as defined in 2..190, above.

2.1.2.11 T as defined in 2.1.1.11, above.

2.1.2.12 T6 as defined in 2.1.1.14, above.

RE-21 Rev. 01-10-00 Page 5 of 17 2.1.2.13 7 10 seconds. It is recognized that exactly equal values cannot always be dialed into the numerator and denominator in the protection system hardware, even if the nominal values are the same (10 seconds). Thus given the inequality sign in the COLR (greater than or equal to) the intent of the definition of this time constant applies primarily to the rate time constant (i.e., the Tau value in the numerator). The lag time constant (denominator Tau value) may be less than 10 seconds or less than the value of the numerator Tau value (e.g., if the numerator is set at 10.5, the denominator may be set to 10 or 9.5) and still satisfy the intent of the anticipatory protective feature.

2.2 Shutdown Margin Limit for MODES 1, 2, 3, and 4: (Specification 3.1.1.1)

A) The Shutdown Margin shall be greater than or equal to 1.3% AK/K, in MODES 1, 2, 3.

B) The Shutdown Margin shall be greater than or equal to 2.2% AK/K, in MODE 4.

2.3 Shutdown Margin Limit for MODE 5: (Specification 3.1.1.2)

The Shutdown Margin shall be greater than or equal to 2.2% AK/K.

2.4 Moderator Temperature Coefficient: (Specification 3.1.1.3) 2.4.1 The Moderator Temperature Coefficient (MTC) shall be less positive than +3.12 x 05 AK/K/0 F for Beginning of Cycle Life (BOL), All Rods Out (ARO), Hot Zero Thermal Power conditions.

2.4.2 MTC shall be less negative than -5.0 x 104 AK/K/0 F for End of Cycle Life (EOL), ARO, Rated Thermal Power conditions.

2.4.3 The 300 ppm ARO, Rated Thermal Power MTC shall be less negative than -4.1 x 104 AK/K/0 F (300 ppm Surveillance Limit).

2.5 Shutdown Rod Insertion Limit: (Specification 3.1.3.5) 2.5.1 The shutdown rods shall be fully withdrawn. The fully withdrawn position is defined as the interval within 225 steps withdrawn to the mechanical fully withdrawn position inclusive.

RE-21 Rev. 01-10-00 Page 6 of 17 2.6 Control Rod Insertion Limits: (Specification 3.1.3.6) 2.6.1 The control rod banks shall be limited in physical insertion as specified in Figure 1. Control Bank A shall be at least 225 steps withdrawn.

2.7 Axial Flux Difference: (Specification 3.2.1) 2.7.1 The indicated AFD must be within the Acceptable Operation Limits specified in Figure 2.

2.8 Heat Flux Hot Channel Factor: (Specification 3.2.2) 2.8.1 FRTPQ = 2.50 2.8.2 K(Z) is specified in Figure 3.

2.8.3 W(Z) is specified in Figures 4.1 to 4.5 and in Table 1.

The W(Z) data is applied over the cycle as follows:

BU < 150 MWD/MTU, linear extrapolation of 150 and 2000 MWD/MTU W(Z) data 150

  • BU < 4000 MWD/MTU, quadratic interpolation of 150, 2000, and 6000 MWDIMTU W(Z) data 4000 < BU < 8000 MWD/MTU, quadratic interpolation of 2000, 6000, and 10000 MWD/MTU W(Z) data 8000
  • BU < 17000 MWDJMTU, quadratic interpolation of 6000, 10000, and 17000 MWD/MTU W(Z) data BU > 17000 MWD/MTU, linear extrapolation of 10000 and 17000 MWD/MTU W(Z) data 2.8.4 The FmQ(Z) penalty factor is 1.02.

RE-21 Rev. 01-10-00 Page 7 of 17 2.9 Nuclear Enthalpy Rise Hot Channel Factor: (Specification 3.2.3) 2.9.1 FNAII FNMI(RTP) x ( I + PF x ( I -P ))

where P = THERMAL POWER RATED THERMAL POWER.

2.9.2.a For FNMl measured by the fixed incore detectors:

FNm(RTP) = 1.536 for the VANTAGE+ (w/ IFMs) and RFA fuels.

2.9.2.b For FN" measured by the movable incore detectors:

FNtH(RTP) = 1.540 for the VANTAGE+ (w/ IFMs) and RFA fuels.

2.9.3 Power Factor Multiplier for FNAII = PF = 0.3 for all fuel types.

RE-21 Rev. 01-10-00 Page 8 of 17 Figure 1 Control Bank Insertion Limits Versus Thermal Power 225 173,225) (0.726225) 200 BANKB X 175 (0.0,188) 2175 (1.0,166

~150BA C,,

W2125 0

a O75 50

  • 0 25 (0.216,0.0 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

0.0 0.2 0.4 0.6 0.8 1.0 Fraction of Rated Thenml Power

/ T RE-21 Rev. 01-10-00 Page 9 of 17 Figure 2 Axial Flux Difference Operating Limits Versus Thermal Power 110 100 90 a) 80 0

0.

70 E

60 S-a) 50 10 a) 40 30 20 10 0

50 -40 -30 -20 -10 0 10 20 30 40 50 60 Axial Flux Difference (%DI)

Note: %DI = %Al

r.f .

RE-21 Rev. 01-10-00 Page 10 of 17 Figure 3 K(Z) Versus Core Height 12 1

0.8 0.4 02 0

0 1 2 3 4 5 6 7 8 9 10 11 12 Core gt(Fetd)

RE-21 Rev. 01-10-00 Page 11 of 17 Figure 4.1 W(Z) Versus Core Height 150 MWD/MTU 1.50 1.45 1.40 1.35 1.30 L 1.25 1.20 1.15 1.10 1.05 1.00 I I I I I I I I I I r

0 1 2 3 4% 0 0 7 8 9 10 11 12 Core Height (Feet)

RE-21 Rev. 01-10-00 Page 12 of 17 Figure 4.2 W(Z) Versus Core Height 2,000 MWD/MTU 1.50 1.45 I 4 4 + 4 $ 4 4 4 4-4 1.40 F t444 9144- 4 1 I or

.L. .3 .

1.30 - - _ _

1.25 1.20 1.1 -is _

1.10

1. 00 - - I I 0 2 3 4 5 6 7 8 9 10 11 12 Core Height (Feet)

RE-21 Rev. 01-10-00 Page 13 of 17 Figure 4.3 W(Z) Versus Core Height 6,000 MWD/MTU

1. 50 - - -_
1. 45 - --
1. 40 -

. 35 I1. 30 - - - ___

N N 1 . 25

1. 20 I
1. 15 _ _ < _7 1 10
1. 05.
1. 00 ... .... .. L . - I 1. L n .* Ia- . . I. .

U 1 4 .5 4% 51) a Ij vy .LU L1 +/-4 Core Height (Feet)

- -. I I RE-21 Rev. 01-10-00 Page 14 of 17 Figure 4.4 W(Z) Versus Core Height 10,000 MWD/MTU I1.45 ~

. 40 IIIII

. 35 ~

I1.

25 ~

I1.20 I I1.15 - -_ _ _ _ _

. 10-1 . 05 ~

1.

0 1 2 3 4 5 6 7 8 9 10 11 12 Core Height (Feet)

RE-21 Rev. 01-10-00 Page 15 of 17 Figure 4.5 W(Z) Versus Core Height 17,000 MWD/MTU 1.50 1.40 1.35_

1.3 0 N 1 2 5 1.20 -

1.15 1.10

1. 05-12 Core Height (Feet)

RE-21 Rev. 01-10-00 Page 16 of 17 Figure 5 f 1 (AI) Function f (A I),

(percent)

-39.35, 60 60 28.59, 60

<t~~~~~~~4

__ 01rl/I2_

-50 -40 -30 -20 -10 0 10 20 30 40 A I Band (percent)

- t -

N RE-21 Rev. 01-10-00 Page 17 of 17 Table 1 W(Z, BU) versus Axial Height HEIGHT (Z) W(Z,BU)

(Feet) 150 2000 6000 10000 17000

____1___60__ MWD/MTU MWD/MTU MWD/MTU MWD/MTU MNVD1MTU S 1.60 1.0000 1.0000 1.0000 1.0000 1.0000 1.80 1.3452 1.3085 1.2840 1.2931 1.3000 2.00 1.3255 1.2884 1.2659 1.2780 1.2852 2.20 1.3048 1.2671 1.2472 1.2629 1.2696 2.40 1.2836 1.2469 1.2299 1.2481 1.2534 2.60 1.2623 1.2333 1.2197 1.2334 1.2365 2.80 1.2396 1.2198 1.2112 1.2216 1.2226 3.00 1.2232 1.2062 1.1999 1.2098 1.2091 3.20 1.2139 1.1950 1.1880 1.1990 1.1979 3.40 1.2055 1.1865 1.1799 1.1918 1.1931 3.60 1.1965 1.1797 1.1733 1.1840 1.1916 3.80 1.1861 1.1749 1.1690 1.1753 1.1898 4.00 1.1781 1.1703 1.1636 1.1663 1.1870 4.20 1.1726 1.1646 1.1566 1.1586 1.1836 4.40 1.1661 1.1582 1.1504 1.1528 1.1793 4.60 1.1590 1.1512 1.1435 1.1462 1.1741 4.80 1.1512 1.1435 1.1359 1.1389 1.1679 5.00 1.1427 1.1351 1.1278 1.1309 1.1605 5.20 1.1336 1.1261 1.1191 1.1226 1.1528 5.40 1.1239 1.1165 1.1096 1.1134 1.1462 5.60 1.1137 1.1065 1.0991 1.1028 1.1408 5.80 1.1032 1.0958 1.0927 1.1025 1.1442 6.00 1.1021 1.0932 1.0930 1.1081 1.1523 6.20 1.1105 1.0998 1.1013 1.1200 1.1587 6.40 1.1166 1.1053 1.1100 1.1321 1.1641 6.60 1.1222 1.1100 1.1176 1.1435 1.1693 6.80 1.1275 1.1169 1.1273 1.1541 1.1748 7.00 1.1345 1.1259 1.1376 1.1635 1.1797 7.20 1.1435 1.1348 1.1465 1.1715 1.1827 7.40 1.1511 1.1427 1.1542 1.1780 1.1843 7.60 1.1575 1.1494 1.1606 1.1829 1.1842 7.80 1.1617 1.1546 1.1656 1.1862 1.1824 8.00 1.1669 1.1596 1.1691 1.1872 1.1789 8.20 1.1743 1.1659 1.1723 1.1871 1.1737 8.40 1.1809 1.1720 1.1769 1.1890 1.1668 8.60 1.1909 1.1776 1.1787 1.1897 1.1589 8.80 1.2030 1.1813 1.1774 1.1910 1.1595 9.00 1.2144 1.1915 1.1853 1.1973 1.1672 9.20 1.2247 1.2119 1.2065 1.2090 1.1800 9.40 1.2378 1.2306 1.2250 1.2231 1.2045 9.60 1.2597 1.2482 1.2431 1.2464 1.2280 9.80 1.2823 1.2758 1.2738 1.2746 1.2497 10.00 1.3021 1.3106 1.3129 1.3024 1.2710 10.20 1.3170 1.3407 1.3487 1.3284 1.2908 210.40 1.0000 1.0000 1.0000 1.0000 1.0000

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