ML20137X719
| ML20137X719 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 03/31/1997 |
| From: | NORTH ATLANTIC ENERGY SERVICE CORP. (NAESCO) |
| To: | |
| Shared Package | |
| ML20137X705 | List: |
| References | |
| RE-21, RE-21-R04, RE-21-R4, NUDOCS 9704220145 | |
| Download: ML20137X719 (21) | |
Text
__-
RE-21 COIE OPERATING LIMITS REPORT 7
i CYCLE 5 COLR i
i RE DEPT SUPERVISOR 60u_[ k 3 27[9/
OPERATIONS MANAGER
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3/Jj/n SIGNATURE AATE REVISION 01-05-04 hb khbbkOh00b43 p
f' RE-21 Rev. Ol-05-04 Page 2 of 21 1.0 Core Operating Limits Report i
i This Core Operating Limits Report for Seabrook Station Unit 1, Cycle 5 has been prepared in accordance with the requirements of Technical Specification 6.8.1.6.
4 r
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
)
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3) 3.1.1.2 Shutdown Margin Limit for MODE 5 f
4) 3.1.1.3 Moderator Temperature Coefficient l
1 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 j
8) 3.2.2 Heat Flux Hot Channel Factor 9) 3.2.3 Ni t..! ear Enthalpy Rise Hot Channel Factor i
1 i
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 j
specified in Technical Specification 6.8.1.6.
l i
2.1 Limiting Safety System Settings: (Specification 2.2.1)
I 2.1.1 Cycle Dependent Overtemperature AT Trip Setpoint Parameters and Function Modifier:
2.1.1.1 K, = 1.145 2.1.1.2 Ki = 0.020 / 'F
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2.1.1.3 K = 0.001/ psig 3
i
RE-21 Rev. O l-05-04 2.111.4 Channel Total Allowance (TA) = N.A.
Page 3 of 21 t
2.1.1.5 Channel Z = N.A.
I 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 2.2% of AT span (150 PU_AT).
2.1.1.8 F (AI) is a function of the indicated difference between top and bottom detectors of the power-range neutron ion chambers with gains to be selected based on measured instmment response
,during plant startup tests. F,(AI) is specified in Figure 1.1.
+
2.1.2 Cycle Dependent Overpower AT Trip Setpoint Parameters and Function Modifier:
2.1.2.1 K = 1.070 2.1.2.2 K, = 0.020 / "F for increasing average temperature and K = 0.0 for decreasing average 5
temperature.
2.1.2.3 K. = -0.00196 / "F for T > T" and K, = 0.0 for T s T", where:
T=,
Average temperature ('F), and T" =
Indicated T,,, at RATED THERMAL POWER (Calibration temperature for AT instrumentation s 588.5 'F).
2.1.2.4 Channel Total Allowance (TA) = N.A.
2.1.2.5 Channel Z = N.A.
~
l 2.1.2.6 Channel Sensor Error (S) = N.A.
i 2.1.2.7 Allowable Value - The channel's maximum Trip Setpoint shall not exceed its computed Trip a
Setpoint by more than 2.1% of AT span (150 PU_AT).
L,'
RE-21 Rev. 01-05-04 Page 4 of 21 l
2.1.2.8 F (AI) is a function of the indicated difference between top and bottom detectors of 2
the power-range neutron ion chambers with gains to be selected based on measured
~
j instrument response during plant startup tests. F (AI) is specified in Figure 1.2.
2 l
2.2 Shutdown Margin Limit For MODES 1,2,3, and 4: (Specification 3.1.1.1) i o
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 1.8 % AK/K in MODE 4.
l 2.3 Shutdown Margin Limit For MODE 5: (Specification 3.1.1.2)
The Shutdown Margin shall be greater than or equal to 1.8 % 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 +2.19 x 104 AK/K/*F for Beginning of Cycle Life (BOL), All Rods Out (ARO), Hot Zero Thermal Power conditions.
I 2.4.2 MTC shall be less negative than -4.2 x 10d AK/K/'F for End of Cycke Life (EOL), ARO, I
Rated Thermal Power conditions.
2.4.3 The 300 ppm ARO, Rated Thermal Power MTC shi.9 he less negative than -3.3 x 10d AK/K/*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 def'med as the interval within 225 steps withdrawn to the mechanical fully withdrawn position inclusive.
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 2.
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RE-21 Rev. OI-05-04 Page 5 of 21 2.7 Axial Flux Difference: (Specification 3.2.1) 4 2.7.1 For operation with the Fixed Incore Detector Alarm OPERABLE, the within the Acceptable Operadon Limits specified in Figure 3.1.
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-2.7.2 For operation with the Fixed Incore Detector Alarm inoperable, the ind I
i within the Acceptable Operation Limits specified in Figure 3.2.
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i 2.8_ Heat Mux Hot Channel Factor: (Specification 3.2.2) 4 4
f 2.8.1 F*n = 2.50 j
2.8.2 For operation with the Fixed Incore Detector Alarm OPERABLE, th 1
surveillance requirements 4.2.2.2 and 4.2.2.4 is specified in Figure 4.1.
i 2.8,3 For operation with the Fixed Incore Detector Alarm inoperable, the K s
surveillance requirement 4.2.1.2 is specified in Figures 4.2, 4.3,4.4, and 4.5.
f 1
2.9 Nuclear Enthalpy Rise Hot Channel Factor:
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(Specification 3.2.3) 1, i
l ne limits on F"an are specified in Figure 5. De limits apply to F"an measured using either the fixed or movable incore detectors since a bounding measurement error h for in determination of the design DNBR limit value.
4-d.
RE-21 Rev. 01-05-04 Page 6 of 21 100 l I ii Coordinates 90
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CORE OPERATING LIMITS REPORT Penalty Function FIGUAE 1.1
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- Fully Withdrawn is defined as the All-Rods-Out position. The control rod insertion limits have been revised to permit ARO repositioning between 225 and 231 steps withdrawn.
Rod Bank insertion Limits versus Thermal Power SEABROOK STATibN CYCLE 5 Four-Loop Operation >
i CORE OPERATING UMITS REPORT C.
FIGURE 2
RE-21 Rev. OI 05-04 Page 9 of 21 l
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Axlal Flux Difference Limits as a Function of Rated Therrnal Power SEABROOK STATION CYCLE 5 for Operation With CORE OPERATING LIMITS REPORT Fixed incore Detector System Afarm inoperable FIGURE 3.2 l
RE-21 Rev. OI-05-04 t
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2.2 2.1 Coordinates 0.00,2.5000
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9 10 11 12 Core Height (Feet)
F (Z) Limit As A Function of Core Height f0rOperation with SEABROOK STATION CYCLE 5 CORE OPERATING LIMITS REPORT Fixed incore Detector System Alarm OPERABLE 4
FIGURE 4.1
RE-21 Rev. 01-05-04 Page 12 of 21 l
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FIGURE 4.2 t
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F (Z) Umit As A Function of Core Height o
fdr Operation with SEABROOK STATION CYCLE 5 CORE OPERATING LIMITS REPORT Fixed incore Detector System Alarm inoperable and Cycle Average Bumup 3.0 to 8.0 GWD/Mtu FIGURE 4.2A
RE-21 I
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F (Z) Limit As A Function of Core Height (Or Operation with SEABROOK STATION CYCLE 5 Fixed incore Detector System Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Burnup 8.0 to 10.0 GWD/Mtu FIGURE 4.3
RE-21 i
i Rev. 01-05-04 Page 15 of 21 2.2 i
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F (Z) Limit As A Function of Core Height f0r Operation with SEABROOK STATION CYCLE 5 Fixed Incore Detector System Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Burnup 10.0 to 12.0 GWD/Mtu l
FIGURE 4.3A
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f0r Operation with SEABROOK STATION CYCLE 5 Fixed incore Detector System Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Burnup 12.0 to 14.0 GWD/Mtu FIGURE 4.3B
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i RE-21 Rev. 01-05-04 Page 17 of 21 l
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Core Height (Feet) i 1
l F (Z) Limit As A Function of Core Height n
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SEABROOK STATION CYCLE 5 Fixed Incore Detector System Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Bumup 14.0 to 16.0 GWD/Mtu FIGURE 4.4 1
RE-21 Rev. 01-05-04 Page 18 of 21 2.2 2.1 A
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l RE-21 i
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F (Z) Limit As A Function of Core Height f0r Operation with SEABROOK STATION CYCLE 5 Fixed incore Detector Syste'n Alarm inoperable CORE OPERATING LIMITS REPORT and Cycle Average Burnup >10.9 GWD/Mtu
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FIGURE 4.4B j
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RE-21 Rev. 01-05-04 Page 20 0f 21 i
Height Exposures (GWD/MTU) i (Ft) 0-3 38
- 8 10 10- 12 12 - 14 14 16 16-18
> 18 i
0.2500 1.931 1.931 1.987 1.970 1.953 1.953 1.995 2.036 0.7500 1.952 1.952 2.006 1.985 1.965 1.965 2.006 2.047 1.2500 1.973 1.973 2.023 2.004 1.986 1.986 2.027 2.068 l
j 1.7500 2.000 2.000 2.047 2 031 2.014 2.014 2.055 2.095 2.2500 2.035 2.035 2.079 2.066 2.053 2.053 2.079 2.105 l
2.7500 2.076 2.076 2.119 2.111 2.103 2.103 2.108 2.114 3.2500 2.050 2.124 2.125 2.094 2.063 2.033 2.003 1.972 1
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3.7500 1.987 2.129 2.082 2.034 1.986 1.939 1.891 1.843 l
l 4.2500 1.934 2.079 2.025 1.971 1.917 1.867 1.817 1.766 4.7500 1.913 2.053 1.997 1.940 1.884 1.836 1.788 1.74 0 5.2500 1.926 2.057 2.000 1.943 1.886 1.836 1.786 1.736 5.7500-1.934 2.051 1.987 1.923 1.859 1.811 1.763 1.716 l
6.2500 1.917 2.002 1.947 1.892 1.836 1.797 1.759 1.720 6.7500 1.929 1.957 1.919 1.882 1.844 1.814 1.784 1.754 7.2500 1.950 1.944 1.921 1.898 1.875 1.856 1.837 1.819 l
7.7500 1.983 1.951 1.942 1.934 1.926 1.919 1.913 1.906 8.2500 1.959 1.950 1.950 1.960 1.970 1.980 1.983 1.985 8.7500 1.939 1.939 1.941 1.960 1.980 1.999 2.016 2.032 9.2500 1.927 1.927 1.935 1.963 1.991 2.019 2.048 2.077 9.7500 1.919 1.919 1.934 1.967 2.000 2.033 2.072 2.110 10.2500 1.914 1.914 1.933 1.968 2.004 2.040 2.083 2.126 10.7500 1.905 1.905 1.932 1.972 2.012 2.052 2.092 2.133 11.2500 1.890 1.890 1.923 1.966 2.008 2.050 2.089 2.128 I
L 11.7500 1.856 1.856 1.890 1.937 1.985 2.032 2.058 2.083 l
l Basis: F RTP = 2.50 Coordinctes for F (Z) Umit As A Function of Core Height q
SEABROOK STATION CYCLE 5 for Operation with CCRE OPERATING LIMITS REPORT Fixed Incore Detector System Alarrn inoperable i
FIGURE 4.5 i
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RE-21 i
Rev. OI-05-04 Page 21 of 21 1.7 o
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