ML20134J536

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Rev 0 to Calculation 22S-B-004E-166, Coms/Ltop Pressure Instrument Loop Accuracy Calculation
ML20134J536
Person / Time
Site: Zion  File:ZionSolutions icon.png
Issue date: 11/04/1996
From: Vande Visse P
COMMONWEALTH EDISON CO.
To:
Shared Package
ML20134J483 List:
References
22S-B-004E-166, 22S-B-004E-166-R00, 22S-B-4E-166, 22S-B-4E-166-R, NUDOCS 9611150258
Download: ML20134J536 (21)
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Text

Exhibit C NEP-12-02Zl Rsvision 1 CALCULATION COVER SHEET Zion Calculation No.: 22S-B-004E-166 DESCRIPTION CODE: 104 ZION NUCLEAR STATION SYSTEM CODE: RC TITLE: COMS/LTOP Pressure Instrument Loop Accuracy Calculation a

REFERENCE NUMBERS Type Number Type Number PROJ 4950 COMPONENT EPN: DOCUMENT NUMBERS: I EPN Number Compt Type Component Doc Type Document Number 1(2)PT-403 DWGC See Sections 5.3.1 - 5.3.4 i 1(2)PT-405 PROC See Sections 5.2.2 - 5.2.4 l 1(2)PXX-403 DATA See Section 5.6.1 1(2)PXX-405 CALC 22S-B-004E-189. Rev.1 I

l REMARKS: Revised calculation reflects a reduced loop uncertainty.

REV. REVISION APPROVED DATE NO.

Revised Loop Accuracy 1

@6. Ch H- 4-%

0 Original Issue D. P. Galanis 3/5/96 Effective S/2496 A R P

Exhibit C N EP-12-02 Revision 3 page 1 of 2 COMMONWEALTH EDISON COMPANY CALCULATION TITLE PAGE CALCULATION NO. 22S-B-004E-166 PAGE NO.: 1 OF 21

@ SAFETY RELATED 0 REGULATORY RELATED 0 NON- SAFETY RELATED CALCULATION TITLE:

COMS/LTOP Pressure Instrument Loop Accuracy Calculation STATION / UNIT: ZION /1&2 SYSTEM ABBREVIATION: RC EQUIPMENT NO.

1(2)PT-403 PROJECT NO. 4950 1(2)PT-405 1(2)PXX-403 1(2)PXX-405 REV: 1 STATUS: Approved QA SERIAL,NO. OR CHRON NO. N/A DATE: N/A PREPARED BY: Chuck Hallett h[ DATE: /////76 REVISION

SUMMARY

Revised Assumption 3.1 to include reference to Comed methodo!ogy document. '

Added Assumption 3.6 for maximum containment temperature. Added reference 5.1.6 to ISA-S67.04-1982.

Recalculated module temperature effects as random variables as vendor specifies. Relocated dnft consideration from bistable module to new channel drift section. Added statements that transmitter and bistable drift are 2a random variables.

ELECTRONIC CALCULATION DATA FILES REVISED:

(Name ext / size /date/hourmin/ verification method / remarks)

N

  • E/Wlfs /If9fs *2/.*/2 p DO ANY ASSUMPTIONS IN THIS CALCULATION REQUIRE LATER VERIFICATION YES O NO @

. , n i .., . s REVIEWED BY: P. VandeVisse 448DdDW DATE:

REVIEW METHOD: [ g M // g h yfe g COMMENTS (C, NC OR Cl): //[@O6 APPROVED BY: Dean Galanis O. f. G-S -,-- DATE: 11- 4-%

issued: 9/3/96

s Exhibit C NEP-12-02 Revision 3 page 2 of 2 COMMONWEALTH EDISON COMPANY CALCULATION REVISION PAGE CALCULATION NO. 22S-B-004E-166 PAGE NO.: 2 OF 21 REV: 0 STATUS: Approved QA SERIAL NO. OR CHRON NO. N/A DATE: 3/5/96 PREPARED BY: C. Hallett DATE: 1/18/96 REVISION

SUMMARY

Initial issue ELECTRONIC CALCULATION DATA FILES REVISED: NONE (Name ext / size /date/ hour: min / verification method / remarks)

DO ANY ASSUMPTIONS IN THIS CALCULATION REQUIRE LATER VERIFICATION YESO NO@

1. REVIEWED BY: S. McCarthy DATE: 3/1/96
2. REVIEW METHOD: Detailed Review COMMENTS (C, NC, Cl): NC
3. APPROVED BY: D. Galanis DATE: 3/5/96 REV: STATUS: QA SERIAL NO. OR CHRON NO. DATE:

)

PREPARED BY: DATE:

REVISION

SUMMARY

ELECTRONIC CALCULATION DATA FILES REVISED:

(Name ext / size /date/hourmin/ verification method / remarks)

DO ANY ASSUMPTIONS IN THIS CALCULATION REQUIRE LATER VERIFICATION YESO NOS

1. REVIEWED BY: DATE:
2. REVIEW METHOD: COMMENTS (C, NC, Cl):
3. APPROVED BY: DATE:

Exhibit D NEP-12-02 Revision 3 i

COMMONWEA:LTH EDISON COMPANY l CALCULATION TABLE OF CONTENTS PROJECT 4950 CALCULATION NO. 22S-B-004E-166 REV. NO.1 PAGE NO. 3 DESCRIPTION PAGE NO. SUB-PAGE NO.

l TITLE PAGE 1 i CALCULATION REVISION PAGE 2 TABLE OF CONTENTS 3 l - 1. PURPOSE / OBJECTIVE 4  ;

2. METHODOLOGY / ACCEPTANCE CRITERIA 4
3. ASSUMPTIONS AND LIMITATIONS 6 j
4. DESIGN INPUT 7  :

)

5. REFERENCES 9  !
6. CALCULATIONS 11 4 7.

SUMMARY

AND CONCLUSIONS 22 1 4

ATTACHMENTS NONE 4

i V

. i

~

lasued: 9fS96

COMMONWEALTH EDISON COMPANY 6ALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO. 4

1. PURPOSE / OBJECTIVE 1.1 This calculation will determine the accuracy of the Core Over-pressurization Mitigation System  !

l (COMS) instrument channel; formerly known as Low Temperature Over-pressure Protection (LTOP). This calculation includes the combined sensor and Eagle-21 bistable uncertainties under  !

normal environmental conditions only. The results are intended for use in separate setpoint calculations.

2. METHODOLOGY / ACCEPTANCE CRITERIA I

2.1 The methodology used for this calculation is presented in TID-E/l&C-10, " Analysis of Instrument Channel Setpoint Error and Instrument Loop Accuracy" Rev. 0 [5.1.1) and TID-E/l&C-20, " Basis For Analysis of instrument Channel Setpoint Error and Instrument Loop Accuracy", Rev.0 [5.1.2].

References 5.1.1 and 5.1.2 are consistent with the methodology within ISA S67.04-1982 [5.1.6].

2.2 The format for this calculation differs from that of TID-E/l&C-10 Rev 0 Exhibit B in order to comply with the format set forth in NEP-12-02, Rev 1.

2.3 Some instrument channels at nuclear power generating facilities perform functions that are critical for assuring the reactivity process is terminated, the reactor is safely shutdown, and the essential safety feature systems are initiated in a timely manner to mitigate the consequences of design basis accidents or transient events. For these channels, a very high confidence level in the estimation of total instrument channel error is appropriate for assuring that the instrument channel setpoint is established in a manner that allows the channel to perform its protective action during those events before critical safety limits are reached.

Other instrument channels perform functions that provide reactor operators with information that allows them to assess the readiness of safety systems by monitoring various system parameters and allowing operators to verify whether the reading indicates that the system meets certain acceptance criteria depicted in the plant technical specifications. These functions require only a moderate confidence level in the estimation of total instrument channel error.

l Accordingly, a graded approach methodology, has been established where instrument channels are first classified into one of four levels (Level 1, Level 2, Level 3, and Level 4) according to the highest function served by the instrument channel. Then the errors in the channel modules are identified, documented, and propagated. Finally, the total error for the channel is determined by combining the errors using one of four methods, appropriate to channel level classification.

Additionally, where applicable, the setpoint and/or allowable value and allowance for spurious trips (AST), are determined in the manner appropriate for the instrument channel classification The methodology used in evaluating the accuracy of the loop process measurements and setpoints differ from TID-E/l&C-10 Rev 0 in the following areas:

Magnitude of confidence interval estimates Method of determining Calibration Uncertainty Method of combining non-random error terms Application of Drift Error REVISION NO. 1

COMMONWEALTH EDISON COMPANY 6ALCUl_ATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO. 5 These differences are in accordance with a Level 3 graded approach methodology. Level 3 is used for calculating setpoints or loop accuracies, where the instrument functions are utilized for EOP-non-operator actions and RG 1.97 Type B, C, D, and E parameters and Technical Specification Compliance Channels.

2.3.1 Magnitude of confidence interval estimates:

Total error is defined in Exhibit A of Reference .5.1.2 as: Te = to Ie  ;

Where: t = confidence interval a = the total random error that affects the loop output Ie = the sum of the positive or negative non-random errors that affect the loop output, whichever is applicable For this calculation a value of 1 will be used for t.

2.3.2 Method of determining Calibration Uncertainty (CAL)

Calibration Standard errors (STD) are insignificant and will not be included in determining the '

Calibration Uncertainty (CAL).

Reference Accuracy to M&TE Calibrated Accuracy (RA:CAMTE) ratios must be less than 4:1 before being factored into the calibration uncertainty (CAL). If RA:CAMTE is 4:1 or greater, M&TE reading errors (REMTE), Temperature errors (TEMTE) and Other errors (OTHERMTE) are insignificant contributors to CAL and will be considered negligible.

When more than one item of M&TE is used to calibrate an instrument, the total reference accuracy of each item of M&TE must be summed algebraically to determine if RA:CAMTE 2 4:1 Determination cf RA:CAMTE ratios may be achieved by review of M&TE available for use in the Instrument Maintenance Department inventory. Where attemate choices of M&TE are available, i the uncertainty of one of a kind or specialized test equipment will not be considered a limiting value.

2.3.3 Method of combining Non-Random Symmetrical Error Terms Non-random symmetrical error terms will be combined utilizing the square-root-sum-of-the-squares (SRSS) method rather than the algebraic method.

2.3.4 Application of Drift Error The definition of the drift error term is changed to refer to the time dependent error l associated with the performance of the entire instrument channel, rather than the performance of individual components within an instrument channel. The drift term (D) l is combined with the channel accuracy to obtain a total channel accuracy. The minimum instrument channel drift error term (D) will be the greater of the known drift value or 11% of span per year (2o). j 2.4 Acceptance Criteria Not applicable to instrument uncertainty calculations REVISION NO. 1 1

COMMONWEALTH EDISON COMPANY CALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO. 6

3. ASSUMPTIONS AND LIMITATIONS 3.1 In accordance with Reference 5.1.2, unless specific information is available to indicate otherwise, published instrument vendor accuracy specifications are assumed to be random, normally distributed,2a uncertainties; equivelent to a 95.5% probability the device error will be bound by the vendors accuracy term.

3.2 Temperature, humidity, normal radiation, pressure, static pressure and over-pressure effects have been incorporated when provided by the manufacturer. Otherwise, these errors are assumed to be small and capable of being adjusted out each time the instrument is calibrated.

Therefore, unless specifically provided, errors can be assumed to be included within the instrument reference accuracy.

3.3 Power supply variations (eV) are assumed to be negligible due to the regulated and highly reliable sources of power supplied to the safety-related instrument busses.

. 3.4 Current leakage errors (elRn) will be considered negligible due to the high insulation resistance values of instrument cable in normal (non-harsh) environments.

3.5 Measuring & Test Equipment Limitations 3.5.1 Pressure Transmitter inpui pressure is measured by a precision test gauge or digital indicator.

Each specification given in Section 6.3.1.2 is the most conservative (greatest uncertainty) of the Heise Analog Series C & CM or Digital Series 7 and 9 available at Zion Station. These specifications do not include uncompensated analog gauges. Their i0.1% full scale error per 5"F deviation from reference temperature preclude their use in a high temperature environment.

3.5.2 M&TE erroris based upon use of the Fluke 8842A. The applicable calibration procedures References 5.2.1,5.2.2 and 5.2.4 require use of a Fluke 8842A Digital Multimeter for DC voltage measurements.

3.6 Containment temperature is limited to an upper temperature of 120*F [ Table 2] during normal plant operation. LTOP/COMS is active only with the plant shutdown and RCS temperature in the range of 60*F to 320'F. Under LTOP/COMS operating conditions, where heat is not added by the reactor, containment temperatures should approach ambient. Ambient temperature would be limited to a nominal summer high temperature of 90*F and therefore it is assumed that transmitter temperature should not exceed 90*F for the purpose of determining temperature effects related to LTOP/COMS.

REVISION NO. 1

COMMONWEALTH EDISON COMPANY

~

CALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO. 7

4. DESIGN INPUT 4.1 The calibration interval for PT-403/405 froni Reference 5.6.2 is 550 days (18 months), with an

" increase interval" of 0 days. These values are the equivalents, respectively, to the terrns

" Surveillance Interval" and " Late Factor" of Reference 5.1.2.

l 4.2 Process Racks are the analog or digital modules downstream of the transmitter or sensing device which condition a signal and act upon it prior to input to a voting logic. For digital functions this I includes; conversion resistor, transmitter power supply, signal conditioning A/D converter and CPU. i The Westinghouse Eagle-21 Process Rack design values from Reference 5.1.4 and equivalent i Comed designation are listed below:

4.2.1 Rack Calibration Accuracy = Reference Accuracy = 10.2% span 4.2.2 Rack Comparator Setting Accuracy = Setting Tolerance = Not Applicable for digital processor 4.2.3 Rack Drift = Drift = iO.3'V- span for 90 days for digital channels 4.2.4 Rack Temperature Effect = iemp. Effect = 10.25% span 4.2.5 Seismic effects on process racks are included in Environmental Allowance j Environmental Allowance => Rack Seismic Effect = 0% span.

l REVISION NO. 1

COMMONWEALTH EDISON COMPANY l i dALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO. 8 4.3 LOOP ELEMENT DATA MODULE #1 MODULE #2 PT-403/405 EAGLE-21 PXX-403/405 (5 5 il [5141 Manufacturer Rosemount Inc. Westinghouse Model number 1154-GP9-RA Eagle 21 l

Calibrated Span Upper Range Limd (URL) 3000 pssg input 4 to 20 mAdc across 49.57170 l

input 0 to 3000 psig Output - Contact Logic Output 4 to 20 mAdc Reference Accuracy 10.25% of calibrated span 20.20% span (4.2.11 l Stability (Dnft) 20 2% of URL / 30 months 20 3% span / 3 months [4 2.3]

Humidity Limits O to 100% Relative Humiddy Not Specsfied l

Temp Effect *(0.75% URL + 0 5% span) per 100*F 10 25% span [4241 Radtation Effect Not Specified for Non-accident condition Not Specified Seismic Effect 0.5% URL (7 c's) 0% span (4.2 51 )

Static Pressure N/A to non-differential pressure devices N/A to electncal devices Pressure Effect Not Specified N/A to electncal devices Over Pressure Effect 0% @ c4500 psig N/A to electncal devices Power Supply Effect <0 005% output span / von included in Reference Accuracy l Table 1 )

4.4 LOCAL SERVICE ENVIRONMENT MODULE #1 MODULE #2 l PT-403/405 PXX-403/405 l

[5 4.11 IS 4.11 EQ Zone C1 A1 Location Containment Auxiliary Building 642' Coi.: 27 Row: J NORMAL CONDITIONS l Temperature Range 65*F to 120*F 74*F to 76*F Pressure - 14.7 psia -0.1 +0 3 Atmospheric Humeddy 10 to 50% RH 35 to 45% RH  :

Radiation 2 x 10' RAD Maximum integrated exposure 1 x 10' RAD Total maximum integrated dose  !

[40 years + DBE1 Table 2 i

4.5 CALIBRATION PROCEDURE DATA MODULE #1 MODULE #2 PT-403/405 PC-403D

[5 2.21 [5 2.41 Calibrated input Range O to 3000 psig 4 to 20 mAdc (01983 to 0 9914 Vdc across 49 57170)

Input Span 3000 psi 0.7931 Vdc Output Range 0.1983 to 0 9914 Vdc N/A - Logic Output (4 to 20 mAdc across 49.57170 input)

Output Span 0 7931 Vdc N/A - Logic Otdput Setting Toierance to 004 Vdc (to 5% span) N/A [4 2.21 Table 3 REVISION NO. 1

1 COMMONWEALTH EDISON COMPANY

. 1 CALCUi.ATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO. 9

5. REFERENCES 5.1 METHODOLOGY j 5.1.1 TID-E/l&C-10 Rev. O, " Analysis of Instrument Channel Setpoint Error & Instrument Loop Accuracy",

5.1.2 TID-Ell &C-20 Rev. O, " Basis for Analysis of Instrument Channel Setpoint Error & Loop l Accuracy", l I

5.1.3 TID-E/l&C-26, " Evaluation of Measurement and Test Equipment Equivalency", Rev.1

)

5.1.4 WCAP-12582 " Westinghouse Setpoint Methodology for Protections Systems, Zion Units 1 and  !

2, EAGLE 21 Version", dated August 1991 (Westinghouse Proprietary Version) 5.1.5 Intemational Society for Measurement and Control Recommended Practice ISA-RP67.04 Part il " Methodologies for the Determination of Setpoints for Nuclear Safety-Related Instrumentation" 5.1.6 Instrument Society of America Standard ISA-S67.04-1982 "Setpoints for Nuclear Safety-Related Instrumentation Used in Nuclear Power Plants" 5.2 ZION STATION PROCEDURES 5.2.1 Zion Procedure IMAP-01 Rev.11 "Prowdure/ Instructions / Cal Sheet Guidance" l 5.2.2 Zion Procedure IMTS-1P-403 Rev.1 " Reactor Coolant Wide Range Pressure Transmitter (Rack 1)"

5.2.3 Zion Procedure IMAS-1P-403 Rev. 3 " Reactor Coolant Wide Range Pressure Eagle Automatic Calibration (Rack 1)"

5.2.4 Zion Procedure IMMS-1P-403 Rev. 2 " Reactor Coolant Wide Range Pressure Eagle Manual Calibration (Rack 1)"

5.3 ZION STATION DRAWINGS 5.3.1 22E-1-4945A Rev. Y " Loop Schematic Diagram Reactor Coolant System Part 1" 5.3.2 22E-1-4945P Rev. S " Loop Schematic Diagram Reactor Coolant System Part 13" 5.3.3 22E-2-4945A Rev. Y " Loop Schematic Diagram Reactor Coolant System Part 1" 5.3.4 22E-2-4945P Rev. O " Loop Schematic Diagram Reactor Coolant System Part 13" REVISION NO. 1

i COMMONWEALTH EDISON COMPANY UALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.10 5.4 ENVIRONMENTAL PARAMETERS 5.4.1 Zion Station Environmental Qualification Report; Appendix B - Plant Environmental Conditions Table, Revision 9 5.5 VENDOR PRODUCTINFORMATION 5.5.1 Rosemount Product Data Sheet 2514 Rev. 4/87 for Model 1154 Alphaline Nuclear Pressure Transmitters 5.5.2 Heise Bulletin HE-1 " Precision Pressure Gauges "

l 5.5.3 Heise Bulletin DP-1 " Series 7 Digital Pressure Indicators" '

5.5.4 Heise Bulletin S9-1 " Series 9 Digital Pressure Instrument" 5.5.5 Fluke 8842A Digital Multimeter Instruction Manual, Rev. 2 6/86 5.6 OTHER REFERENCES 5.6.1 Comed instrument Database IDATA, Specific Verified Data Sheet, and Verified Supplemental  ;

Data Sheet for the following instnaments.

l 1PT-403 Rev.C 1 PT-405 Rev.C 2PT-403 Rev.C 2PT-405 Rev.C ,

5.6.2 Computer Data base GSIN - Instrumentation System Version 0.4 i

1 REVISION NO. 1

COMMONWEALTH EDISON COMPANY CALCULATION NO. 22S-B-004E 166 PROJECT NO. 4950 PAGE NO.11 l

6. CALCULATIONS 6.1 INSTRUMENT CHANNEL CONFIGURATION AND DESCRIPTION ,

t A

B 3 REL E VALV  ;

PT _

Pc-403(5)D BISTABLE SW.

{a- .% & INo. LTG  ; ALARM  ;

1 Bs-403(5)c Wide Range RCS Pressure PC-403(5)C  ;

Eag!e 21 Process Rack l

l Pressure Transmitters PT-403 & 405, located inside containment, sense Reactor Coolant System (RCS) pressure. The transmitter outputs are routed through containment penetrations to the Eagle-21 Process Racks located in the Auxiliary Electric Room where they are converted from analog to digital signals. The digital pressure signals are compared to programmed values in the Eagle-21 processor memory. Bistable logic signals are generated whenever RCS pressure exceeds a programmed value (setpoint) to open the Power Operated Relief Valves (PORVs) 6.2 PROCESS PARAMETERS The pressure transmitters sense RCS pressure and are scaled for 0 to 3000 psig.

Uncompensated static head bias due to transmitter elevations versus tap location will be factored into a separate setpoint calculation, and are not accounted forin this calculation.

6.3 CALCULATION OF MODULE ERRORS 6.3.1 MODULE 1 ERRORS 6.3.1.1 RA (Reference Accuracy)

Transmitter output is measured at the Eagle-21 Process Rack Output span = 793.1x10 Vdc [5.2.2)

Accuracy = 0.25% of Span . Output Span = 0.0025 0.7931 Vdc

[ Table 1)

= 1983 x 10-3 Vdc RA = Accuracy= it983 x 10-3 Vdc

= 9915 x 10-6 Vdc RA = i 991.5x104 Vdc REVISION NO. 1

COMMONWEALTH EDISON COMPANY CALCU'LATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.12

6.3.1.2 CAL (Calibration Equipment Errors) 6.3.1.2.1 Input MTE1 0 - 3000 psig Pressure Gauge [5.5.2) 6.3.1.2.1.1 Station Calibration Accuracy CAMTE CAMTE = i0.1% span.3000 psi i3 ps.
[5.5.2]

CAMTE = i3 psi 6.3.1.2.1.2 Temperature error of M&TE TEMTE Temp error specification TE = 10.004 P" [5.5.3, 5.5.4)

S Table 2 Containment Temp %, = 90*F [3.6] i 1

TEMTE = 0 6.3.1.2.1.3 Other M&TE Errors OTHERMTE No further M&TE errors are identified OTHERMTE = 0 6.3.1.2.1.4 Reading error of M&TE REMTE ,

REMTE = { smallest division on analog gauge

= 1. 5 psi [5.1.3]

4

it25 psi REMTE

  • 1.25 psi 6.3.1.2.1.5 Sensor Transfer Function Sout = 0.7931Vdc [5.2.2]

S 3000 psi in REVISION NO. 1

COMMONWEALTH EDISON COMPANY i T

CALCUi.ATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.13 6.3.1.2.1.6 MTE1,opp g3 'CAMIE TEMTE OM 2 2 2 g' , '6]-1/2 f >

,(S i r ' -1/2

'3 psi 00'2 2 ,

'Q7931 W (2 2 2s t 3000 psi s

.( ,

= d5162 x 10-6Vdc MTE1p, , = iS16.2x10* Vdc ,

6.3.1.2.2 Output M&TE2 .

Fluke Model 8842A DMM 0 to 2 Vdc Scale [5.5.5]

6.3.1.2.2.1 Station Calibration Accuracy CAMTE Accuracy = *0.0030% Rdg + 2 counts (fast speed) [5.5.5]

Resolution = 100 V CAMTE = i(0.003% .1 Vdc + 2 100pVdc )

=i 30 x 104 + 200 x 10-6 Vdc

= 1230.0 x 10-6 Vdc CAMTE = 1230.0X10* Vdc l 6.3.1.2.2.2 Temperature error of M&TE TEMTE The transmitter output is measured at the Eagle 21 racks in the Aux. Electric Room ~ mere temperature is controlled between 74 and 76'F [ Table 2], falling within the DMM's certified temperature range of 73.419'F; therefore TEMTE = 0 6.3.1.2.2.3 Other M&TE Errors OTHERMTE No further M&TE errors are identified, therefore;-

OTHERMTE = 0 6.3.1.2.2.4 Reading error of M&TE REMTE REMTE = LSD (Least Significant Digit)

LSD = 100 V REMTE = 100x104 Vdc REVISION NO. 1

COMMONWEALTH EDISON COMPANY dALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.14 6.3.1.2.2.5 MTE2  ;

s.v2 CAMTE TEMTE OTHERMTE 2  !

MTE2=1 REMTE 2 2 2

-y s

-V2

'

  • 4

=1 ++ Vdc 4 Vdc

= 1152.4 x 10

+(100 x 10 MTE2 = 1152.4x10' Vdc )

6.3.1.2.3 Calibration Error CAL CAL = *[ (MTE1)*+ (MTE2)*]i/2 4 4

= i[(516.2x10 Vde)* + (152.4x10 Vdc)*]

CAL = *538.2x10' Vdc I l

6.3.1.3 Calibration Setting Tolerance Uncertainty ST l

STg = 0.004 Vdc ST3e 10.004 Vdc I *

  • 3l ST= = = 11333 x 10-3 Vdc 3 3 ST = ti.333x104 Vdc 6.3.1.4 Sensor Temperature Effect STE (0.75% URL + 0.5% Calibrated Span)

STE [5.5.1]

2a = 100 "F (0.0075 3000 psi + 0.005 e 3000 psi) l 100 'F 37.5 psi 100 'F A T = T,,,,_ - T,,,, ,,,,,,,

[3.6]

= 90 F - 65 F = 25 F 6, 793.1 x 10-2 Vdc 6,, 3000 psi l

l REVISION NO. 1

COMMONWEALTH EDISON COMPANY 6ALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.15 STE2 , = ATo error o 6 "'

6,

= i25 F e 37.5 psi,793.1 x 10-' Vdc 100 F 3000 psi

2478 x 10-8 Vdc 2" 2478 x 10~ Vdc STE =

2 2

= i1239 x 10-8 Vdc i 4

STE = i1.239x10 Vdc 6.3.1.5 Module Drift D in accordance with Methodology Section 2.3.4, drift is determined on a channel basis and will not be included in determining the individual module uncertainty.

6.3.1.6 Determination of Random Errors a1 c1 = 1 [ RA* + CAL' + ST: + STE* ]

4 4

= * [(991.5x10 Vdc)2 + (538.2x10 Vdc)2 + (1.333x10'8 Vdc)2 + (1.239x10 ' Vdc]ii2 c1 = i 2.141x104 Vdc 6.3.1.7 Determination of Non-random Errors Ie1+ and Ie1-l 6.3.1.7.1 Humidity Error eH eHn = 0 [3.1]

l l 6.3.1.7.2 Seismic Error eS error = to.5% URL l eSnsym = error e 6**

l 8,,

4 Vdc

= (0.5% . 3000 psi) . 793.1 x 10 3000 psi 4

= 13.966 x 10 Vdc i

eSnsym = i 3.966x104 Vdc 6.3.1.7.3 Over Pressure Error eOP eOP=0 [ Table 1] j 6.3.1.7.4 Power Supply Error eV eVn = 0 [3.3]

REVISION NO. 1 I

COMMONWEALTH EDISON COMPANY 1

DALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.16

. 6.3.1.7.5 Total Positive Non-random ErrorIen1*

) Een1+ =

(eHn *)' + (eSn')' + (eOPn+)' + (eVn*)'

1/2 j

  • 2 2 2

=

-0 + (3.966 x 10-' Vde)' + O + O -

= +3.966 x 10-' Vdc 1 1

4 Ien1+ = + 3.966x10 Vdc i J l j l k 6.3.1.7.6 Total Negative Non-random Error Zen 1-t i

Ien1 = -

(eHn-)* + (eSn-)* + (eOPn-)* + (eVn-)*

v2 2 2

=-

0 +(3.966 x 10-8 Vde)' + 02 + 0 1

= -3.966 x 10 Vdc l 4

Ion 1 = - 3.966x10 Vdc 6.3.2 MODULE 2 ERRORS i

6.3.2.1 RA (Reference Accuracy)  !

Accuracy = 10.2% span [5.1.4] l

= 10.002 0.7931 Vdc l

= *1.586x10-' Vdc P

4 g_ Aavacy~_ itS86 x10 Vdc l

2 2

= 7931x104 Vdc  !

4 RA = i793.1x10 Vdc l

l l

REVISION NO. 1

COMMONWEALTH EDISON COMPANY q

CALCdLATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.17 6.3.2.2 CAL (Calibration Equipment Errors)

M&TE Error Reference 5.2.3 required test equipment is a Fluke 8842A DMM, the same as required to calibrate the sensor, Only this DMM is used to verify accuracy of the EAGLE-21 Rack,

! therefore CAL = MTE2. From 6.3.1.2.2.5; MTE2 = i152.4x10* Vde, therefore; I 4 4 RA: CAL = 793.1x10 Vdc : 152.4x10 Vdc = 5.2:1

Therefore, per Section 2.3.2;
CAL = to Vdc 6.3.2.3 o2 input (Random Error at Module input) 02 input = i 2.141x10 Vdc [6.3.1.4] ,

6.3.2.4 Rack Temperature Effect RTE l RTE2 , = i0.25% span.0.7931 Vdc span j

= 1983 x 10 Vdc i 1983 x 10-' Vdc [ Table 1]

RTE = RTE2 " =

2 2 i

= 9915 x 10-8 Vdc i

RTE = 1991.5x10 dVdcTable 1 6.3.2.5 D (Module Drift) 4 in accordance with Methodology Section 2.3.4, drift is determined on a channel basis and will l 1

not be included in determining the individual module uncertainty.  !

i 1

6.3.2.6 Determination of Random Errors ( a2 ) l o2 = t [ RA* + CAL 2+ o2 input 2+ RTE 2)tiz 4 4

= i[(793.1x10 Vdc)* + (O Vdc)2 + (2.141x10' Vde)' + (991.5x10 Vdc)2 )t/2 o2 = i 2.489 x104 Vdc  !

. Ccnverting Vdc to psi i2489 x 10~'Vdc (72 = i2.489 x 10~ Vdc=

6., 793.1 x 10-'Vdc i

. 6,, 3000 psi

= 9.415 psi 6.3.2.7 Determination of Non-random Errors (Ie2+ and Ie2-) under Normal Operating Conditions 6.3.2.7.1 Seismic Error eS eSn = 0 [ Table 1]

REVISION NO. 1

COMMONWEALTH EDISON COMPANY 0

t DALCdLATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.18  ;

6.3.2.7.2 Power Supply Error eV eVn = 0 [3.3] -

6.3.2.7.3 Non-random Errors Present in input Signals e2inputn e2inputn* = Een1+

[6.3.1.7.5)

= +3.966 x 10-3 Vdc e2inputn+ = +3.966x104 Vdc 1

e2inputn~ = Eeni~

[6.3.1.7.6)

= -3.966 x 10-3 Vdc e2inputn = -3.966x104 Vdc i 6.3.2.7 4 Total Positive Non-random ErrorIen2+

Een2+ = (eSn*f +(eVn*f +(e2inputn*

= Vdc 02+O2 + (3.966 x 10-3

= +3.966 x 10-3 Vdc Ien2+ = +3.966x104 Vdc l

l I

l I

l REVISION NO. 1 i

! l l COMMONWEALTH EDISON COMPANY l

. DALCdLATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.19 L

6.3.2.7.5 Total Negative Non-random Error Ien2-l Ien2' = - (eSn~f +(eVn~f +(e2inputn~f l - .

1/ 2 1

=- Vdc 02+02 + (3.966 x 10-3

= -3.966 x 10-3 Vdc l Ien2 = -3.966x104 Vdc ,

t 6.3.2.7.6 Converting Ien2 to psi l Ien2.,_ - i3.966 x 10 Vdc 3.966 x 10-*Vdc l i

! 6., - 793.1 x 10 Vdc l l

6 3000 psi

= i15.002 psi

! 6.4 TOTAL INSTRUMENT CHANNEL ERROR 6.4.1 Channel Error Positive Normal Channel Error (Cen+)

Cen+ = 1. (+cr2) + Iat2+ = 1. +9.415 psi + 15.002 psi

= +24.417 psi Cen+,w = +24.417 psi Negative Normal Channel Error (Ten ~)

Cen' = 1. (-cr2) + Ien2~ = 1. -9.415 psi + (-15.002 psi)

= -24.417 psi l Cen p.i = -24.417 psi l

l l

i REVISION NO. 1 l

COMMONWEALTH EDISON COMPANY

^

dALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO. 20 6.4.1 Channel Drift 6.4.1.1 Transmitter Drift Vendor specifies the transmitter drift to be a 2a random variable equal to 10.2% of the Upper Range Limit (URL). The transmitter URL and calibrated span are both equal to 3000 psi, therefore the drift term is equivalent to *0.2% span.

The 30 month interval specified by the vendor bounds the 18 month sunteillance interval, therefore; l

D = 2a , 0.2% span W% y 6.4.1.2 Rack Drift Vendor treats Eagle 21 rack drift as a 2e random variable in Reference 5.1.4 Rack Drift = Drift = *0.3% span for 90 days for digital channels

'18 months .125%C' Drift = (0.3% span)2, 2a _

( 3 months s,

= 0.822% span Ofiff2g 0.822% span Dg = " = 0.411% span 2 2 6.4.1.3 Channel Drift Since both the transmitter vendor and the Rack vendor identify their respective drift error terms as random, it is considered reasonable to consider the Doi nw as random.

L = ( & +D'm)"' )

= 1((0.1%)* + (0.411%)*)"

= i0.423% span l Per Methodology Section 2.3.4, the equivalent 1a 22.5 month Channel Drift equals;

'18 months = 125%c1/ 2

'(10% span)2, i 12 months s Drift min " 2 l

= i0.685% span The minimum channel c' rift error proscribed in Section 2.3.4 is greater than calculated drift and therefore conservative, therefore Den,,,,, = 0.685% span . 3000 psi

= i20.550 psi REVISION NO. 1

COMMONWEALTH EDISON COMPANY

~

CALCdLATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO. 21 6.4.2 Total Instrument Channel Error Ten * = 1. (o2)* + (O + Ien2+

c ,,,,,,,,,)*[

= 1. ((9.417 psi)* +(20.550 psi)*) + 15.002 psi

= +37.607 psi Ten = -1. (o2)* + (D + Ien2-c ,,,,,,,,,)*[

= -1.((9.416 psi)* +(20.550 psi)*)" +(-15.002 psi)

= -37.607 psi Ten * = i 37.607 psi = 138 psi

7.

SUMMARY

AND CONCLUSIONS The Total Loop Error to be considered in determining Low Temperature Over-pressurization l Protection Eagle-21 Setpoints is i 38 psi; based upon pressure signals from PT-403 and PT-405 under normal operating conditions.

FINAL PAGE 1

1 REVISION NO. 1

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