ML20035H089
| ML20035H089 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 03/31/1993 |
| From: | Wicyk P COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML19303F591 | List: |
| References | |
| NUDOCS 9305030107 | |
| Download: ML20035H089 (37) | |
Text
WESTINGHOUSE PROPRIETARY CLASS 3
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ZION N888 SETPOINT. EVALUATION l
i PROTECTION SYSTEN CEANNELS i
EAGLE 21 VERSION.
WESTINGBOUSE CNANNELS i
i Revision 2 March 1993 l
P. J. Wicyk i
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i Commonwealth Edison Company i
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Nuclear Engineering Department.
j 9305030107 930427 PDR-ADOCK 05000295 o
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l WESTINGHOUSE PROPRIETARY CLASS 3-l TABLE OF CONTENTS l
i Section Title Page I.
Introduction 1
II.
Setpoint Evaluation Program 2
III.
Conclusions 32 i
IV.
References 33 r
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WESTINGHOUSE PROPRIETARY CLASS 3
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LIST OF TABLES Table Title Page 2-1 Power Range Neutron Flux - High and Low Setpoints 3
2-2 Power Range Neutron Flux - High Positive Rate and 4
High Negative Rate 2-3 Intermediate Range, Neutron Flux (DELETED) 5 2-4 Source Range, Neutron Flux (DELETED) 6 2-5 Overtemperature AT 7
2-6 Overpower AT 12 2-7 Pressurizer Pressure - Low and High Reactor Trip 14 2-8 Pressurizer Water Level 15 2-9 Loss of Flow 16 2-10 Steam Generator Water Level Low and Low-Low 17 2-11 Undervoltage 18 2-12 Underfrequency 19 2-13 Containment Pressure - High, High-High 20 2-14 Pressurizer Pressure - Low, Safety Injection 21 2-15 Steamline Pressure - Low 22 2-16 Tm Low-Low 23 2-17 Steam Flow / Feed Flow Mismatch 24 2-18 Differential Pressure Between 2 Steam Lines - High 26 2-19 Steam Flow in Two Steam Lines - High 28 2-20 Power Range Neutron Flux, P-8 30 2-21 Steam Generator Water Level Overfill Protection, 31 Permissive P-14 ii
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T WESTZHGHOUSE PROPRIETARY CIASS 3 LIST OF FIGURES Figure Title Page 2-1 Overtemperature AT Function 9
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2-2 Illustration of Overtemperature and Overpower AT 11 Protection 2-3 Overpower AT Function 13 l
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WESTINGHOUSE PROPRIETARY CLASS 3 f
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INTRODUCTION l-(
1 The Commonwealth Edison Nuclear Engineering Department has performed an evaluation of the Zion NSSS reactor protection system and ESF setpoints in support of the implementation of Vantage 5 fuel.
Since Zion station is incorporating the Westing-house EAGLE 21 protection system, this evaluation was performed with the EAGLE 21 allowances where applicable.
The evaluation program ensures that the proposed protection setpoints are acceptable with respect to the safety analysis limits associated with the vantage 5 upgrade, t
The Reactor Trip and ESF setpoint evaluations presented in the document are for those channels listed in reference 1 and imple-mented at Zion Units 1 and 2 with the exception of the source range neutron flux and intermediate range neutron flux channels.
These channels and the associated setpoints are now implemented by the Gamma Metrics Source and Intermediate range channels and are no longer included with the Westinghouse channels in this j
document.
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l WESTINGHOUSE PROPRIETARY CLASS 3 II.
SETPOINT EVALUATION PROGRJ.M l
The Zion Setpoint Evaluation program evaluated the design input required by the Westinghouse Setpoint Methodology (reference 1).
The program obtained Zion physical plant and conduct of opera-tions data, where applicable, for determining the accuracies and errors identified by the Westinghouse Setpoint Methodology.
)
Using this methodology, evaluation of the reactor trip and ESF setpoints with respect to the safety analysis limits associated l
with the Vantage 5 fuel implementation was performed.
l The following tables list the Trip Setpoints per reference 1 l
(except Intermediate and Source Range Neutron Flux), Safety i
Analysis Limits per reference 3, and value of each accuracy / error g
i term obtained by the setpoint validation program.
Using the Westinghouse methodology (reference 1) and these accuracy / error terms, an Allowable Value was determined and is listed for each channel.
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WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-1 POWER RANGE, NEUTRON FLUX - HIGH AND LOW SETPOINTS Parameter Allowance
- Process Measurement Accuracy
_ <ss
_. s.c Primary Element Accuracy Sensor Calibration Accuracy Sensor Measurement & Test Equipment Accuracy Sensor Drift Sensor Pressure Effect Sensor Temperature Effect Rack Calibration Accuracy Rack Measurement & Test Equipment Accuracy Rack Comparator Setting Accuracy, Rack Drift 1.0
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Rack Temperature Effect Environmental Allowance Bias Setpoint High 109% RTP Low 25% RTP Safety Analysis High 118% RTP Low 35% RTP Allowable value High 111.6% RTP Low 27.6% RTP
- In percent span (120% Rated Thermal Power)
Page 3
WESTINGHOUSE PROPRIETARY CLASS 3 l
Table 2-2
]
POWER RANGE, NEUTRON FLUE - HIGE POSITIVE AND NEGATIVE RATES j
l Parameter Allowance
- i Process. Measurement Accuracy
_ 4.x l
l Primary Element Accuracy Sensor Calibration Accuracy Sensor Measurement & Test Equipment Accuracy l
Sensor Drift Sensor Pressure Effect
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Sensor Temperature Effect l
Rack Calibration Accuracy Rack Measurement & Test Equipment Accuracy
}
Rack Comparator Setting Accuracy l
Rack Drift 0.5
+.x Rack Temperature Effect Environmental Allowance I
f Bias Setpoint 5% RTP-
[
/2 sec.
Safety Analysis not used l
Allowable Value 6.5% RTP
/2 sec.
- In percent span (120% Rated Thermal Power)
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WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-3 INTERMEDIATE RANGE, NEUTRON FLUI Parameter Allowaneg Table Deleted Page 5
WESTINGHOUSE PROPRIETARY CZ. ASS 3 Table 2-4 SOURCE RANGE, NEUTRON FLUZ Parameter Allowance t
Table Deleted i
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WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-5 OVERTEMPERATURE'AT Parameter Allowance
- Process Measurement Accuracy
_4...
Primary Element Accuracy 3ensor Calibration Accuracy
+ a.c Sensor Measurement & Test Equipment Accuracy c
3..
Sensor Drift
+
Sensor Pressure Effect Sensor Temperature Effect c
3.
Rack Calibration Accuracy
+,4 j
Rack Measurement & Test Equipment Accuracy i
+ a.c
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Y t
Rack Comparator Setting Accuracy
{
Rack Drift l
AT 1
Pressure AI
~!
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WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-5 (con't)
OVERTEMPERATURE AT Parameter Allowance
- Rack Temperature Effect
_ +"
+u 1
Environmental Allowance i
Bias Setpoint function")
Safety Analysis figure")
Allowable Value 1.72% AT span 1
(1) see Figure 2-1, Overtemperature AT Function, page 9 (2) see Figure 2-2, Illustration of Overtemperature and Overpow-er AT Protection, page 11 i
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- 'In percent span (Tavg - 100*F, pressure - 800 psig, power - 120% RTP)
(AT - 96.0*F, power - 150% RTP, AI -
60% AI) i l
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WESTINGHOUSE PROPRIETARY CLASS'3 Figure 2-1 OVERTEMPERATURE AT FUNCTION f 1+t.Si f 1+tS' 1
1 + t S;(T-T') + K ( P-P')
f(AI)
AT
,1 + t S, s A T K -K o
1 2
3 1
3 2
t l
Where:
t Lead-lag compensator on measured AT
}
1+r S
=
1+r3S t
I Time constants utilized in the lead-lag controller for 1
7, r3
=
4 AT, r,= 8 seconds, r3 = 3 seconds i
4 Indicated AT at RATED THERMAL POWER ATo
=
K 1.36
=
K2 0.0180/*F
=
The function generated by the' lead-lag controller i
11I. S
=
1+r2S for Tm dynamic compensation
(
7, 7:
Time constants utilized in the lead-lag controller for
=
3 T,,
7 = 33 seconds, r2 4 seconds.
.{
=
i T
Average temperature,
'F
=
T' 5 562.2*F (Nominal T, at RATED THERMAL POWER)
=
I K
0.000935
=
3 Pressurizer pressure, psig l
P
=
2235 psig (Nominal RCS' operating pressure)
P'
=
Laplace transform operator, S
S
=
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t L
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. WESTINGHOUSE PROPRIETARY CLASS 3 Figure 2-1 (con't)
OVERTEMPERATURE AT FUNCTION and f (AI) is a function of the indicated difference between top and bottom detectors of the power range nuclear ion chamber: with
-i gains to be selected based on measured instrument response during plant startup tests such that:
(i) for qt-qb between -50 percent and +8.0 percent f (AI)=0 i
(where qt and qb are percent RATED THERMAL POWER in the top and bottom halves of the core respectively, and qt+qb is total THERMAL POWER.in percent of RATED THERMAL POWER).
J (ii) for each percent that the magnitude of (qt-qb) exceeds -50 percent, the AT trip setpoint shall be automatically re-
~
duced by 0.0 percent of its value at RATED THERMAL POWER.
i (iii) for each percent that the magnitude of (qt-qb) exceeds
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+8.0 percent, the AT trip setpoint shall be automatically i
reduced by 1.66 percent of its value at RATED THERMAL-l POWER.
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il WESTINGHOUSE PROPRIETARY CIASS 3 5
Figure 2-2 ILLUSTRATION OF OVERTEMPERATURE AT AND OVERPOWER AT PROTECTION 4
DVERTEPPERATURE AT TRIP 75 "
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l' WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-6 OVERPOWER AT Parameter Allowance
- Process Measurement Accuracy
- +u Primary Element Accuracy Sensor Calibration. Accuracy Sensor Measurement & Test Equipment Accuracy Sensor Drift Sensor Pressure Effect-Sensor Temperature Effect Rack Calibration Accuracy
+
E
-] u Rack Measurement & Test Equipment Accuracy Rack Comparator Setting Accuracy Rack Drift Rack Temperature Effect Environmental Allowance Bias i
t Setpoint function
- i
-t Safety Analysis figure
- l I
Allowable Value 1.34% AT span j
(1) see Figure 2-3, Overpower AT Function, page 13 (2) see Figure 2-2, Illustration of Overtemperature and Overpow-i er AT Protection, page 11 i
)
- In percent span (AT - 96.0*F) i Page 12-l
WESTINGHOUSE PROPRIETARY CLASS !
r Figure 2-3 OVERPOWER AT FUNCTION i
i I 1 + t.S' f TS' 3
AT SAT X, - X T - X (T-T') - f (A1) a s
s (1+t S,
,1 +T S, 2
3 3
Where:
1+r4S Lead-lag compensator on measured AT I
=
1+r3S i
Time constants utilized in the lead-lag controller for
~
7, r5
=
4 AT, f = 8 seconds, rs = 3 seconds 4
ATo Indicated AT at RATED THERMAL POWER i
=
K 1.09
=
4 K
0.020/*F for increasing average temperature and O for
=
3 decreasing average temperature 1+ r3S for T m dynamic compensation
(
__tE The function generated by the lead-lag controller
=
i l
Time constant utilized in the lead-lag controller for r3
=
T m, r3 = 10 seconds 4
~
K, 0.002117/ *F for T>T" and K. = O for TsT" l
=
T Average temperature,
'F
=
T" Indicated T, at RATED THERMAL POWER (calibration
=
temperature for AT instrumentation, s 562.2*F)
S Laplace transform operator, S-1
=
f (AI) 0 for all AI
=
3
.t u
t
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WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-7 PRESSURIZER PRESSURE - LOW AND HIGH REACTOR TRIPS Parameter Allowance
- Process Measurement Accuracy
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Primary Element Accuracy Sensor Calibration Accuracy Sensor Measurement & Test Equipment Accuracy Sensor Drift Sensor Pressure Effect Sensor Temperature Effect Rack Calibration Accuracy Rack Measurement & Test Equipment Accuracy Rack Comparator Setting accuracy Rack Drift Rack Temperature Effect Environmental Allowance Bias Setpoint Low 1825 psig High 2385 psig Safety Analysis Low 1700 psig High 2410 psig Allowable Value Low 1819 psig High 2387 psig
- In percent span (800 psig)
Page 14
WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-8 PRESSURIZER WATER LEVEL - HIGH Parameter Allowance
- Process Measurement Accuracy
~
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Primary Element Accuracy Sensor Calibration Accuracy Sensor Measurement & Test Equipment Accuracy i
Sensor Drift Sensor Pressure Effect Sensor Temperature Effect Rack Calibration Accuracy Rack Measurement & Test Equipment Accuracy Rack Comparator Setting Accuracy Rack Drift Rack Temperature Effect Environmental Allowance Bias Setpoint 92% level Safety Analysis not used Allowable Value 92.8% level
- In percent span (100% of span)
Page 15
WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-9 LOSS OF FLOW Parameter Allowance
- Process Measurement Accuracy
~
Primary Element Accuracy Sensor Calibration Accuracy Sensor Measurement & Test Equipment Accuracy Sensor Drift l
Sensor Pressure Effect Sensor Temperature Effect Rack Calibration Accuracy Rack Measurement & Test Equipment Accuracy Rack Comparator Setting Accuracy Rack Drift Rack Temperature Effect Environmental Allowance Bias Setpoint 90% minimum measured flow.
Safety Analysis 85% minimum measured flow Allowable Value 89.5% minimum measured flow 66.1% span *
- In percent AP span (100% AP span) where 100% indicated flow has been adjusted to be consistent with 100% actual flow as deter-mined by a precision flow calorimetric and the low flow setpoint is adjusted to 290% indicated flow.
Page 16 l
WESTINGHOUSE. PROPRIETARY CLASS 3 Table 2-10 STEAM GENERATOR WATER LEVEL - LOW AND LOW-LOW-LO88 OF NORMAL FEED / MASS AND ENERGY RELEASE Parameter Allowance
- Process Measurement Accuracy
~
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Primary Element Accuracy Sensor Calibration Accuracy Sensor Measurement & Test Equipment Accuracy Sensor Drift Sensor Pressure Effect Sensor Temperature Effect Rack Calibration Accuracy Rack Measurement & Test Equipment Accuracy Rack Comparator Setting Accuracy Rack Drift Rack Temperature Effect Environmental Allowance Bias Setpoint Low 25% level Low-Low 10% level Safety Analysis Low not used Low-Low 0% level Allowable Value Low 24.2% level Low-Low 9.2% level
- In percent span (100% span)
Page 17
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WESTINGHOUSE PROPRIETARY CLASS 3
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Table'2-11 UNDERVOLTAGE l
l Parameter Allowance
- Process Measurement Accuracy
_
- a,C l
j Primary Element Accuracy Sensor Calibration Accuracy j
l Sensor Measurement & Test Equipment Accuracy Sensor Drift Sensor Pressure Effect i
Sensor Temperature Effect
.i Rack Calibration Accuracy 4
Rack Measurement & Test Equipment Accuracy Rack Comparator Setting Accuracy Rack Drift 3.75 Rack Temperature Effect
_ _. a.c Environmental Allowance Bias l
1 Setpoint 70% Bus voltage Safety Analysis 59% Bus voltage ("
Allowable Value 60.83% Bus voltage (1) Value not directly input.in analysis, but is combined-with channel uncertainties to determine the allowable value.
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- In percent span (4200 VAC)-
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WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-12 UNDERFREQUENCY Parameter Allowance *
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Process Measurement Accuracy Primary Element Accuracy Sensor Calibration Accuracy Sensor Measurement & Test Equipment Accuracy Sensor Drift Sensor Pressure Effect Sensor Temperature Effect Rack Calibration Accuracy Rack Measurement & Test Equipment Accuracy Rack Comparator Setting-Accuracy
'.4 Rack Drift 4
~
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Rack Temperature Effect l
Environmental Allowance Bias Setpoint 57.0 Hz Safety Analysis
'56.5 Hz Allowable Value 56.7 Hz
- In percent span (4.5 Hz)
Page 19
WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-13 CONTAINMENT PRESSURE - HIGE, HIGH-HIGH Parameter Allowance
- Process Heasurement Accuracy Primary Element Accuracy Sensor Calibration Accuracy Sensor Measurement & Test Equipment Accuracy Sensor Drift Sensor Pressure Effect Sensor Temperature Effect Rack Calibration Accuracy Rack Measurement & Test Equipment Accuracy Rack Comparator Setting Accuracy Rack Drift Rack Temperature Effect Environmental Allowance Bias Setpoint High 4.5 psig High-High 23.0 psig Safety Analysis High 6.0 psig H.igh-High 24.8 psig Allowable value High 4.7 psig High-High 23.5 psig
- In percent span (60 psig)
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Table 2-14 PRE 88URIEER PRES 8URE - LOW, SAFETY INJECTION f
Parameter Allowance
- Process Measurement Accuracy
- +sc Primary Element Accuracy Sensor Calibration Accuracy Sensor Measurement & Test Equipment Accuracy Sensor Drift Sensor Pressure Effect Sensor Temperature Effect Rack Calibration Accuracy t
Rack Measurement & Test Equipment Accuracy j
Rack Comparator Setting Accuracy i
Rack Drift
.l Rack Temperature Effect Environmental Allowance l
r Bias i
Setpoint 1815 psig i
t Safety Analysis 1700 psig e
Allowable value 1809 psig
- In percent span (800 psig) i j
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WESTINGHOUSE PROPRIETARY CLASS 3 i
Table 2-15 STRAMLINE PRESSURE - LOW i
Parameter Allowance
- f Process Measurement Accuracy
- *u Primary Element Accuracy i
Sensor Calibration Accuracy f
Sensor Measurement & Test Equipment Accuracy i
Sensor Drift Sensor Pressure Effect Sensor Temperature Effect Rack-Calibration Accuracy Rack Measurement & Test Equipment Accuracy Rack Comparator Setting Accuracy r
Rack Drift i
Rack Temperature Effect l
Environmental Allowance Bias i
[
Setpoint 600 psig-t Safety Analysis 350 psig i
Allowable Value 590.3 psig l
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- In percent span (1200 psig)
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WESTINGHOUSE PROPRIETARY. CLASS 3 Table 2-16 i
i TAVG - LOW-LOW l
i Parameter Allowance *
- u Process Measurement Accuracy Primary Element Accuracy Sensor Calibration Accuracy Sensor Measurement & Test Equipment Accuracy Sen4or Drift I
Sensor Pressure Effect r
Sensor Temperature Effect l
Rack Calibration-Accuracy E
-] u 1
Rack Measurement & Test Equipment Accuracy Rack Comparator Setting Accuracy Rack Drift 1
i Rack Temperature Effect Environmental Allowance Bias i
f Setpoint 540*F Safety Analysis 535'F A.llowable Value 538.7'F-
- In percent span (100.0*F)
Page 23
WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-17 STEAM / FEEDWATER FLOW MISMATCH Parameter Allowance'
..e Process Measurement Accuracy
~
_.u Primary Element Accuracy Sensor Calibration Accuracy
_ +u Sensor Measurement & Test Equipment Accuracy Sensor Drift
_u Sensor Pressure Effect
_.u Sensor Temperature Effect
_.y Rack Calibration Accuracy
~~.u steam flow feedwater flow E
Rack Measurement & Test Equipment Accuracy steam flow feedwater flow E
]o Rack Comparator Setting Accuracy Page 24
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l WESTINGHOUSE PROPRIETARY CLASS 3 i
Table 2-17 (con't) i STEAM / FEEDWATER FLOW MISMATCH
{
l Parameter Allowance
- l
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Rack Drift steam flow
~
~ +u j
feedwater flow steam pressure 1
Rack Temperature Effect steam flow I
feedwater flew i
E
]
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Environmental Allowance i
- Bias,
)
i Bias 2
~
~
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Setpoint 60% steam flow Safety Analysis not used' Allowable Value 62% steam flow
- In percent span (120% steam flow). Percent AP converted to' flow span assuming Fm = 120%, Fu = 100% for steam flow, and Fu = 40%
for feedwater flow.
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WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-18 DIFFERENTIAL PRESSURE BETWEEN TWO STEAM LINES - HIGH Parameter Allowance
- Process Measurement Accuracy
~
Primary Element Accuracy Sensor Calibration Accuracy Loop A Loop B Sensor Measurement & Test Equipment Accuracy Loop A Loop B Sensor Drift Loop A Loop B Sensor Pressure Effect Sensor Temperature Effect Loop A Loop B Rack Calibration _ Accuracy
_.u Loop A Loop B Rack Measurement & Test Equipment Accuracy Loop A Loop B Rack Comparator Setting Accuracy Rack Drift Loop A Loop B Rack Temperature Effect Environ = ental Allowance Environmental Allowance 2 l
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I WESTINGHOUSE PROPRIETARY CLASS 3 Taole 2-18 (con't)
DIFFERENTIAL PRES 8URE BETWEEN TWO STEAN LINES - RIGE Parameter Allowance *
- + 4.C Bias 3 Bias 2
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Setpoint 100 psi i
Safety Analysis 520 psi l
Allowable Value 106.6 psi
'i In percent span (100% = 1200 psig) j l
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F WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-19 STEAM FLOW IN TWO STEAMLINES - HIGE Parameter A_11owance*_.u Process Measurement Accuracy Primary Element Accuracy Sensor Calibration Accuracy
{
] +u turbine impulse pressure Sensor Measurement & Test Equipment Accuracy c
3.o turbine impulse pressure Sensor Drift c
3.o turbine impulse pressure Sensor Pressure Effect c
3.o Sensor Temperature Effect Eurbine impulse pressure Rack Calibration Accuracy c
.o turbine impulse. pressure [
Rack Measurement & Test Equipment Accuracy urbine impulse pressure Rack Comparator Setting Accuracy Rack Drift turbine impulse pressure Rack Temperature Effect urbine impulse pressure Environmental Allowance 0
~
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r WESTINGHOUSE PROPRIETARY CLASS 3 1
Table 2-19 (con't) l STEAN FLOW IN TWO STEAKLINES - HIGH Parameter Allowance
- Biasi
~
Bias 2 Setpoint function ("
Safety Analysis function
- Allowable Value function *
(1)
A function defined as follows:
A AP corresponding to 40% of full steam flow between 0% and 20% load and then a AP in-creasing linearly to a AP corresponding to 110% of full steam flow at full load.
(2)
A function defined as follows:
A AP corresponding to 56% of full steam flow between 0% and 20% load and then a.:AP in-creasing linearly to a AP corresponding to 126% of' full steam flow at full load.
The steam flow channel has a range of 0 - 120% steam flow, thus limiting the 100% load Safety Analysis Limit to 120%.
(3)
A function defined as follows:
A AP corresponding to 44.02%
of full steam flow between 0% and 20% load and then a AP increasing linearly to a AP corresponding to 110.75% of full steam flow at full load.
- In percent span (100% AP span). Percent AP converted to flow span assuming Fuu = 120% and Fu = 100%.
Page 29
1 WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-20 POWER RANGE NEUTRON FLUZ, P-8 Parameter Allowance
- Process Measurement Accuracy
_...e
+.c Primary Element Accuracy Sensor Calibration Accuracy Sensor Measurement & Test Equipment Accuracy Sensor Drift Sensor Pressure Effect Sensor Temperature Effect Rack Calibration Accuracy Rack Measurement & Test Equipment Accuracy Rack Comparator Setting Accuracy Rack Drift Rack Temperature Effect Environmental Allowance Bias Setpoint 28.0% RTP Evaluation Limit not used Allowable Value 30.6% RTP
- In percent span (120% Rated Thermal Power) i Page 30
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WESTINGHOUSE PROPRIETARY CLASS 3 Table 2-21 STEAM GENERATOR WATER LEVEL - OVERFILL PROTECTION PERMISSIVE P-14 Parameter Allowance
- Process Measurement Accuracy
- +u Primary Element Accuracy Sensor Calibration Accuracy Sensor Measurement & Test Equipment Accuracy I
Sensor Drift Sensor Pressure Effect Sensor Temperature Effect Rack Calibration Accuracy Rack Measurement & Test Equipment Accuracy Rack Comparator Setting Accuracy Rack Drift Rack Temperature Effect Environmental Allowance Bias Setpoint 70% level l
Safety Analysis 80% level Allowable Value 70.8% level
)
i
- In percent span (100% span)
Page 31
WESTINGHOUSE PROPRIETARY CLASS 3 III.
CONCLUSIONS The results of the Zion Setpoint Evaluation Program ensure that the setpoints utilized to support the Vantage 5 fuel implementa-tion, and included in the planned licensing amendment, are conservative with respect to the associated safety analysis limits specified in reference 3.
The Zion Setpoint Validation Program conclusions are supported by Nuclear Engineering calcula-tions which use Zion specific design input and approved Westing-house setpoint methodology (reference 1).
The Evaluation program identifies the Rack Calibration Accuracy (RCA) and Rack Comparator Setting Accuracy (RCSA) for each channel (tables 2-1, 2-2, 2-5 through 2-21).
The value of the l
" established tolerance", as used in the Zion Technical Specifications, is equivalent to the Rack Calibration Accuracy for the channels summarized in Tables 2-5 through 2-10, 2-13 l
through 2-19,and 2-21 and to the Rack Comparator Setting Accuracy for the channels summarized in Tables 2-1, 2-2, 2-11, 2-12 and 2-l 20.
The Validation Program also provides channel Allowable Value(s) to be used as acceptance criteria by the Zion station to verify that the setpoints are maintained conservative with respect to the safety analysis limits.
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F WESTINGHOUSE PROPRIETARY CLASS.3 IV.
REFERENCES 1.
WCAP 12582, Westinghouse Setpoint Methodology for Protection Systems, Zion Units 1 and 2, EAGLE 21 Version, Augurt 1991 2.
WCAP 12523, Bases Document for Westinghouse Setpoint Method-ology for Protection Systems, Commonwealth Edison Company, Zion / Byron /Braidwood Units, October 1990 3.
Letter from Kenneth N. Kovar to Peter J. Wicyk, RSA:91-160, 10/31/91, Zion Setpoint Study Safety Analysis Limits 4.
Letter from Kenneth N. Kovar to Peter J. Wicyk, RSA:91-165, 11/15/91, Zion Setpoint Study Safety Analysis Limits 5.
Westinghouse letter CWE-91-282, 11/21/91, Vantage 5/ EAGLE 21 P-8 Permissive 6.
Letter from Kenneth N. Kovar to Peter J. Wicyk, RSA:91-171, 11/25/91, Zion Permissives for Vantage 5 Analyses 7.
Letter from E. H. Young to T. P. Joyce, NFS:PSS:92-075, March 6, 1992, Zion Steam Flow in Two Steamlines Setpoint 8.
Letter from K. N. Kovar to R. A. Chrzanowski, RSA:92-025, February 18, 1992, Zion Units 1 and 2 Loss of Flow Reactor Trip Setpoint Technical Specification 9.
Westinghouse letter CWE-91-299, 12/7,0/91, Clarification of EAGLE 21/ VANTAGE 5 Setpoint Constants (K, TAU) 10.
Letter from R.G. Mason to T.A. Rieck, CHRON/ 193687, 11/30/92, Zion Station Eagle-21 Technical Specification OPDT and OTDT Equations Page 33