ML20129E983

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Rev 0 to Coms/Ltop Pressure Instrument Loop Accuracy Calculation
ML20129E983
Person / Time
Site: Zion  File:ZionSolutions icon.png
Issue date: 01/18/1996
From: Hallett C
COMMONWEALTH EDISON CO.
To:
Shared Package
ML20129E920 List:
References
22S-B-004E-166, 22S-B-004E-166-R00, 22S-B-4E-166, 22S-B-4E-166-R, NUDOCS 9610280223
Download: ML20129E983 (17)
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_ . . - . -. - _ - - _-. ._

4 CALCULATION COVER SHEET Zion Calculation No.: 22S-B-004E-166 Title.: COMS/LTOP Pressure Instrument Looo Accuracy Calculation ZION NUCLEAR STATION Project

Title:

I&C Setooint Proaram PURPOSE: Determine the instr; ment 1000 uncertainty for use in further calculations for the PORV Core Overpressurization Mitiaation System setooint.

CALCULATION TYPE: IS SR SOFTWARE USED: None PLANT DESIGN CHANGE NUMBER: N/A PROJECT NUMBER: 4950 RELATED/ REFERENCED CALCULATIONS: None COMPONENT IDENTIFICATION DRAWING NUMBERS: 1/2PT-403 NUMBERS: 22E-1-4945A Rev. V 1/2PT-405 22E-1-4945P Rev. S 1/2PXX-403 2tE 2-4945A Rev. W 1/2PXX-405 _2.2E-2-4945P Rev. O REMARKS:

CHRON # 0313950 REV. REVISION APPROVED DATE NO. l 0 OriginalIssue Q.? C 3-s-96 l 9610280223 961022 PDR ADOCK 05000295 P PDR NEP-1242 Revision 1 ExhetMt E lesued: 11/20/96

Exhibit C NEP-12-02 Revision 1 page 1 of 2 COMMONWEALTH EDISON COMPANY CALCULATION TITLE PAGE 4

CALCULATlGN NO. 22S-B-004E-166 PAGE NO.: 1 OF 16

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

, LTOP Pressure Instrument Loop Accuracy Calculation l

t l

. l STATION / UNIT: ZION /1&2 SYSTEM ABBREVIATION: RC i EQUIPMENT NO. PT-403 PXX-403 PROJECT NO. 4950 PT-405 PXX-405 j REV: O STATUS: Approved QA, SERIAL y NO. OfftMRON NO. 0313950 DATE: 1/18/96 PREPARED BY: Chuck Hallett d(/Ml [4 M/ DATE: 1/18/96 REVISION

SUMMARY

Rev. 0 - INITIAL ISSUE ELECTRONIC CALCULATION DATA FILES REVISED: None (Name ext / size /date/hourmin/ verification method / remarks)

I DO ANY ASSUMPTIONS IN THIS CALCULATION REQUIRE LATER VERIFICATION YES O NO @

m . _

REVIEWED BY: Steve McCarthy 67 /d DATE: Yv%6 REVIEW METHOD: M;lJ kag COMMENTS (C OR NC): MC.

APPROVED BY: c'D.f.C h DATE: E-5-7 C 4

&ht.

issued: 11/20/95

. 1 Exhibit D NEP-12-02 Revision 1 COMMONWEALTH EDISON COMPANY CALCULATION TABLE OF CONTENTS PROJECT 4950 CALCULATION NO. 22S-B-004E-166 REV. NO. O PAGE NO. 2 DESCR!PTION PAGE NO. SUB-PAGE NO.

TITLE PAGE 1 TABLE OF CONTENTS 2

1. PURPOSE / OBJECTIVE 3
2. METHODOLOGY / ACCEPTANCE CRITERIA 3
3. ASSUMPTIONS AND LIMITATIONS -

5

4. DESIGN INPUT 5 S. REFERENCES 7
6. CALCULATIONS 8
7.

SUMMARY

AND CONCLUSIONS 16

' j i

I i

I leeued: 11/20S6 1 I

i ,

l COMMONWEALTH EDISON COMPANY CALCULATION NO,22S-B-004E 166 PROJECT NO. 4950 PAGE NO. 3

1. PURPOSE / OBJECTIVE 1.1 This calculation will determine the accuracy of the Core Overpressurization Mitigation System (COMS) instrumentation; formerly known as Low Temperature Over-pressure Prctection ,

(LTOP). This calculation includes the combined sensor and Eagle-21 bistacle uncertainties under normal environmental conditions only. The results are intended for ase in separate setpoint calculations.

2. METHODOLOGY / ACCEPTANCE CRITERIA  !

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. O [5.1.1] and TID- l E/l&C-20, " Basis For Analysis of Instrument Channel Setpoint Error and Instrument Loop j Accuracy", Rev.0 [5.1.2].

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 l protective action during those events before critical safety limits are reached.

Other instrument channels perform functions that provide reactor operators with information that allow 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. .

Accordingly, a graded approach methodology, has been established, following industry recommended practice [5.1.5,5.1.6]. 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. O NEP-12 02 Revision 1 Eshibit g leeuet 11M

5 COMMONWEALTH EDISON COMPANY l CALCULATION NO. 22S-B-004E-166 PROJECT NO.

4950 PAGE NO. 4 i

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 pararneters and Technical Specification Compliance Channels."

i 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 i

o = 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 1 j For this calculation a value of 1 will be used for t. I 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).

l Reference Accuracy to M&TE Calibrated Accuracy (RA:CAMTE) ratios must be less than 4:1 before being factored into the calibration uncedainty (CAL). If RA:CAMTE is 4:1 or greater, M&TE reading errors (REMTE), Temperature errors (TEMTE) and Other errors (OTHERMTE) l 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 of RA:CAMTE ratios may be achieved by review of M&TE available for use in the Instrument Maintenance Department inventory. Where altemate choices of M&TE are available, the uncertainty of one of a kind or specialized te,st equipment will not be considered a limiting value.

2.3.3 Method of combining Non-Random Symmetrical Error Terms Non-random symmetncal error terms will be combined utilizing the square-root-sum-of-the-squares (SRSS) method rather than the algebraic method. I 2.3.4 Application of Drift Error The definition of the drift error term is changed to refer to the time dependent error j associated with the performance of entire instrument channels, rather than the l performance of individual components within an instrument channel. The drift term (D) is applied only in the calculation of total random error for the last module of the j instrument channel. The minimum instrument channel drift error term (D) will be the greater of the known drift value or *1% of span per year (2a).

2.4 Acceptance Criteria i

Not applicable t'o instrument uncertainty calculations REVISION NO. 0 NEP 1242 Revision 1 ExhitWtE leeued: 11/20tes I

4 *

  • COMMONWEALTH EDISON COMPANY CALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO. 5 d
3. ASSUMPTIONS AND LIM'TAllONS 3.1 Published instrument vendor specifications are considered to be random, normally distributed 2e values unless specific information is available to indicate otherwise.

I 3.2 Temperature, humidity, normal radiation, pressure, static pressure and over-pressure effects ,

j have been incorporated when provided by tne manufacturer. Otherwise, these errors are assumed to be small and capable of being adjusted out each time the instrument is calibrated.

l Therefore, unless specifically provided, errors can be assumed to be included within the -

instrument reference accuracy.

i 3.3 Power supply variations (eV) are assumed to be negligible due to the regulated and highly j 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 i

values of instrument cable in normal (non-harsh) environments.

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

1 Each specification given in Section 6.3.1.2 is the most conservative (greatest uncertainty) of j 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 20.1% full scale error per j 5'F deviation from reference temperature preclude their use in a high temperature environment.

t

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

. voltage measurements.

f j 4. DESIGN INPUT l 4.1 The calibration interval for PT-403/405 from Reference 5.6.2 is 550 days (18 months), with an I i " increase interval" of 0 days. These values are the equivalents, respectively, to the terms  !

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

4.2 Process Racks are the analog or digital modules downstream of the transmitter or sensing l device which condition a signal and act upon it prior to input to a voting logic. For digital functions this includes; conversion resistor, transmitter power supply, signal conditioning A/D converter and CPU.

I i The Westinghouse Eagle-21 Process Rack design values from Reference 5.1.4 and l equivalent Comed designation are listed below:

1 4.2.1 Rack Calibration Accuracy = Reference Accuracy = *0.2% span 4.2.2 Rack Comparator Setting Accuracy = Setting Tolerance = Not Applicable for digital processor

]

i 4.2.3 Rack Drift = Drift = 10.3% span for 90 days for digital channels i

REVISION NO. 0

  • NEP 1242 Rev6eion 1 Exhitnt E lesued: 11/20195

COMMONWEALTH EDISON COMPANY I

l CALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO. 6 {

4.2.4 Rack Temperature Effect = Temp. Effect = 10.25% span

. 4.2.5 Seismic effects on process racks are included in Environmental Allowance Environmental Allowance => Rack Seismic Effect = 0% span.

4.3 LOOP ELEMENT DATA i

MODULE #1 MODULE #2 j PT-403/405 EAGLE 21 PXX 403/405

[5 5 il [5141 Manufacturer Rosemount Inc. Westeghouse Model number 1154-GP9-RA Eagle 21 Caisbreted Span Upper Range Uma (URL) 3000 posg input 4 to 20 mAcc across 49 57170 inpd 0 to 3000 poig Output Contact Loge Output 4 to 20 mAdc

! Reference Accuracy to 25% of cahbreted span to 20% span [4 2.11 l Statuity (Dnft) 20 25% of URL / 6 months 20 3% span / 3 months [423]

Humidity Limste O to 100% Reletrve Humedsty Not Specified Temp Effect t(0.75% URL

  • O 5% spen) per 100*F to 25% span [4 2.41 j Radiation Effect Not Spec #fied for Non-accadent condehon Not Specifled Sec.rnec Effect 0 5% URL (7 n's) 0% seen [4251 Stenc Pressure N/A to non differenhal pressure devees N/A to electncal dowces

, Pressure Effect Not Specsfied . N/A to electncal devices Over Pressure Effect 0% e <4500 peag N/A to electncal devces Pouver Supply Effect <0 005% output seen / voit included m Reference Accuracy

?

Table 1 i

4 4.4 LOCAL SERVICE ENVIRONMENT

1

! MODULE #1 MODULE #2 j PT-403/405 PXX-403/405

[5 4.11 [5 4.11  !

1 EQ Zone C1 A1 l

, Locobon Conteenment Ausehery Sulldmg 642' Col: 27 Rour J

! NORMAL CONDITIONS l Temperature Range 85*F to 105'F 74*F to 78'F Pressure 14 7 pose -0.1 +0 3 A;i. J.

j Humedsty 10 to 50% RH 35 to 45% RH ,

i Redishon 2 x 10' RAD Mosamum integrated exposure 1 x 10' RAD Total meemum meegrated dose. l l [40 years + DSE1 1

i Table 2 i

4.5 CAllBRATION PROCEDURE DATA i

l MODULE #1 MODULE #2 )

j PT-403/405 Pc-4030

[5.2.21 [5241 4 Celtiteled input Range O to 3000 pasp 4 to 20 mAdc

. (01983 to 0 9914 Vdc acrose 49 57170)

, input Sean 3000 poi 0.7931 Vdc Output Range 0.1983 to 0.9914 Vdc N/A Loge Output (4 to 20 mAdc across 49 57170 input) 4 Output Seen 0.7931 Vdc N/A - Loge Output

  1. Seleng Toserence to 004 vde (20 5% spen) N/A [4 2.2]

Table 3 l

REVISION NO. 0 1

NEP 1242 Rowtaion 1 Eshitiet E leeued: 11/20/98 a

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

5. REFERENCES l

1 5.1 METHODOLOGY 5.1.1 TID-E/l&C-10, " Analysis of Instrument Channel Setpoint Error & Instrument Loop Accuracy",

Rev.0 5.1.2 TID-E/l&C-20, " Basis for Analysis of instrument Channel Setpoint Error & Loop Accuracy",

Rev.0 5.1.3 TID-E/l&C-26, " Evaluation of Measurment 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 11 " Methodologies for the Determination of Setpoints for Nuclear Safety-Related instrumentation" 5.1.6 International Society for Measurement and Control Draft Technical Report ISA-dTR67.04.09

" Graded Approaches to Setpoint Determination" Draft 1,1994 5.2 ZION STATION PROCEDURES 5.2.1 Zion Procedure IMAP-01 Rev.11 " Procedure / Instructions / Cal Sheet Guidance" 5.2.2 Zion Procedure IMTS-1P-403 Rev. O " Reactor Coolant Wide Range Pressure Transmitter (Rack 1)"

5.2.3 Zion Procedure IMAS-1P-403 Rev. 2 " Reactor Coolant Wide Range Pressure Eagle Automatic Calibration (Rack 1)"

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

5.3 ZION STATION DRAWINGS I

5.3.1 22E-1-4945A Rev. V " Loop Schematic Diagram Reactor Coolant System Part 1" 5.3.2 22E-1-4945P Rev. S " Loop Schematic Diagram Reactor Coolant System Part 13" i 1

5.3.3 22E-2-4945A Rev. W " Loop Schematic Diagram Reactor Coolant System Part 1" l

5.3.4 22E-2-4945P Rev. Q " Loop Schematic Diagram Reactor Coolant System Part 13" 5.4 ENVIRONMENTAL PARAMETERS 5.4.1 Zion Station Environmental Qualification Report; Appendix B - Plant Environmental Conditions  ;

Table, Revision 9 l 1

REVISION NO. O NEP-itet Rowision 1 Eshadt E issued: 11/20/95 1

)

COMMONWEALTH EDISON COMPANY CALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO. 8 5.5 VENDOR PRODUCT INFORMATION 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 " i 5.5.3 Heise Bulletin DP-1 " Series 7 Digital Pressure Indicators" l

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 instruments:

1PT-403 Rev.C 1PT-405 Rev.C 2PT-403 Rev.C 2PT-405 Rev.C 5.6.2 Computer Data base GSIN -Instrumentation System Version 0.4

6. CALCULATIONS 6.1 INSTRUMENT CHANNEL CONFIGURATION AND DESCRIPTION l

BISTABLE SW.

. POWER OPERATED

LTG REUEF VALVE o

. PT _

Pces)D .

BISTABLE SW.

& IND. LTG  ; ALARM 18s-403(5)C Wide Auge Acs Preenwo PC-403(5)c

..Ep 21Pvm Red , ,

FIGURE 1 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 whera 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).

REVISION NO. O ISP.1343 Nov6ston 1 EsNMtE leeued: 11/2045

4 COMMONWEALTH EDISON COMPANY

! CALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO. 9 6.2 PROCESS PARAMETERS 4

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 for in this calculation.

i 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 I

Output span = 793.1x10'8 Vdc (5.2.2]

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

[ Table 1] l

= +1983 x 10-3 Vdc g4 ~_ Accuracy _ 1983 x 10-3 Vdc

- j 2 2 .  !

I = 9915 x 10-6 Vdc

! RA = i 991.5x10' Vdc 4

j 6.3.1.2 CAL (Calibration Equipment Errors) f 4

6.3.1.2.1 Input MTE1 0- 3000 psig Pressure Gauge [5.5.2] l j 6.3.1.2.1.1 Station Calibration Accuracy CAMTE l

] CAMTE = 0.1%spane 3000 psi

[5.5.2]

j = 3 psi

  • CAMTE = t 3 psi j

6.3.1.2.1.2 Temperature error of M&TE TEMTE Temp error specification TE =

a > 95*

AT= Containment Tempmax - Reference Temp.

(Table 2]

AT = 105* F- 95* F = 10* F 1

TEMTE = TE= ate span 0.004% span 3000 psi

= 10 F e

  • F span

112 psi TEMTE

  • 1.2 psi REVISION NO. O NEP.1242 Revlakm 1 EaNWtE losued: 11/20/95

COMMONWEALTH EDISON COMPANY CALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.10 {

6.3.1.2.1.3 Other M&TE Errors OTHERMTE i No further M&TE errors are identified l

OTHERMTE = 0 i l

6.3.1.2.1.4 Reading error of M&TE REMTE REMTE = j smallest division on analog gauge

= 1. 5 psi 4 [5.1.3]

= 125 psi REMTE = i 1.25 psi i

6.3.1.2.1.5 Sensor Transfer Function I

Sout , 0.7931 Vdc

[5.2.2]

^

Sg 3000 psi 6.3.1.2.1.6 MTE1,n,, .

1/2 y

909

'CAMTE 7EMTE OTFERVTE 2

, '0l y 2 2 2 s

, ,Sg,

, 11 2

'3pai 1.2 pai 0,2 2 'Q7931W y2 2 2,

, 3000 psi s

=:t6461x 10 4 We MTE1,,,, = t646.1x104 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 = 10.0030% Rdg + 2 counts (fast speed) [5.5.5]

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

=t 30 x 104 + 200 x 10 Vdc

= 230.0 x 10 4 Vdc CAMTE = 1230.0X104 Vdc 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 where temperature is controlled between 74 and 76*F [ Table 2], falling within the DMM's certified ten ^oerature range of 73.4 i9'F; therefore TEMTE = 0 REVISION NO. O NEP.1242 Revie6cn 1 Exhildt E losued: 11/20/96 fL

COMMONWEALTH EDISON COMPANY v .

CALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.11 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 6.3.1.2.2.5 MTE2

' ,1/2 m . J: . m p - - )2 .2

.r i.

.V2 0x104 %0 1

2

-+[

2 4

+(100 x 10 Vdc 21524 x 10-6 Vdc

< 2, MTE2 = *152.4x104 Vdc 6.3.1.2.3 Calibration Error CAL CAL = 1[(MTE1) + (MTE2)*]'"

d

= *[(646.1x10' Vdc)2 + (152.4x10 Vdc)*]'"

CAL = 2663.8x104 Vdc j

6.3.1.3 Calibration Setting Tolerance Uncertainty ST STg = t0.004 Vdc ST= Om Vdc ~

= = 1333 x 10-3 Vdc 3 3 d

ST = 11.333x10 Vdc

?

6.3.1.4 Determination of Random Errors a1 a1 = * [ RA* + CAL' + ST* ]'*

= * [(991.5x10' Vde)2 + (663.8x104Vde)* + (1.333x10d Vde): jin j d

oi = i1.789x10 Vdc 6 6.3.1.5 Determination of Non-random Errors Ie1+ and Ie1-6.3.1.5.1 Humidity Error eH eHn = 0 (3.2]

REVISION NO. O NEP-1242 Revision 1 EaNtd E losued: 1140/95

COMMONWEALTH EDISON COMPANY w

CALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.12 I 6.3.1.5.2 Temperature Error eT error = t (0.75% URL + 0.5% Calibrated Span) l 00

  • F (5.5.1)

~ ~(0.0075 3000 psi +0.005 3000 psi) 100 *F

. _ 37.5 psi l 100 op l A T = T""'" - T"". "

= 105* F - 65* F = 40* F [ Table 2] )

6., _793.1x10-' Vdc 6,, 3000 psi eTnsym = AT
  • error e 6*'"

6,,

- MO* F e 37.5 psi,793.1 x 10-' Vdc 100 F

  • 3000 psi

= 3.966 x 10-' Vdc eTnsym = i 3.966x104 Vdc I

6.3.1.5.3 Seismic Error eS I error = 10.5% URL l

eSnsym = error. 6**  :

'" [ Table 1]

= (0.5% . 3000 psi) .

3000 psi

= i3.966 x 10-* Vdc

  • eSnsym =i3.966x104 Vdc 6.3.1.5.4 Over Pressure Error eOP eOP=0 [ Table 1]

6.3.1.5.5 Power Supply Error aV eVn = 0 [3.3) 6.3.1.5.6 Total Positive Non-random Error Ion 1+

I en1' =

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

= 2 0' + (3.966 x 10-* Vdc)* + (3.966 x 10-* Vde)' + 0' + O

= +5.609 x 10-8 Vdc Ier.1* = + 5.609x104 Vdc REVISION NO. O Nr.1242 m 1 Esheet g Isamd: 11/2046

COMMONWEALTH EDISON COMPANY CALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.13 6.3.1.5.7 Total Negative Non-random Error Ien1-Ient = -

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

2

=- 2 2 0 + (3.966 x 10-8 Vdc)* + (3.966 x 10-8 Vde)* + O + O

= -5.60E x 10 ' Vdc Ien1 = - 5.609x10 Vdc 6.3.2 MODULE 2 ERRORS 6.3.2.1 RA (Reference Accuracy)

Accuracy = 10.2% span (5.1.4]

= 10.002 0.7931 Vdc

= 11.586x10 Vdc 4 Vdc g _ Aa2rmy _ 1586 x10 2 2

17931x104 Vdc RA

  • 793.1x104 Vdc 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 requeed 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 = 1152.4x104 Vde, therefore:

4 RA: CAL = 793.1x10 Vdc : 152.4x10' Vdc = 5.2:1 Therefore, per Section 2.3.2; CAL = *0 Vdc '

6.3.2.3 c2 input (Random E ror at Module input) c2 input =ti.789x10-3 Vdc [6.3.1.4]

REVISION NO. O NEP-1242 Rev6sion i Exhibit E lasued: 11/20/95 E

o COMMONWEALTH EDISON COMPANY CALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.14 6.3.2.4 0 (Module Drift)

From Section 4.2.3; Rack Drift = Drift = 10.3% span for 90 days for digital channels Rack Drift is normalized to 1 year by:

VendorDnft 12 months' ~V2 2a = (0.3% span) =

( 3 months s ,

= 0.6% span per 12 months Vendor Drift is less than 1% span /12 months, therefore, per Section 2.3.4 drift for the final element in a loop = 11% span /12 months. f j

Drift "*

2a = (1% span) . . span

, s12 monthss,

= 12247% span.793.1x 10-3 Vdc = i9.713 x 10-3 Vdc Drift D= 2# = 4.857 x 10-3 Vdc 2 j D = 14.857x104 Vdc 6.3.2.5 Determination of Random Errors ( c2 )

c2 = t [ RA* + CAL' + c2 input2+ D']um I

4 4

= * [(793.1x10 Vde)' + (O Vdc)* + (1.789x10 Vde)2 + (4.857x104 Vdc)*jiir a2 = t 5.236 x104 Vdc 6.3.2.6 Determination of Non-random Errors (Ie2+ and Ie2') under Normal Operating Conditions 6.3.2.6.1 Temperature Error eT '

eTnsym = 0.25% span.0.7931 Vdc span

= [ Table 1]

1.983 x 10 Vdc eTnsym = t 1.983x104 Vdc 6.3.2.6.2 Seismic Error eS eSn = 0 [ Table 1]

6.3.2.6.3 Power Supply Error eV eVn = 0 [3.3]

REVISION NO. O NEP-1242 Rev6sion 1 Exhiedt E lasued: 11/20/95

, COMMONWEALTH EDISON COMPANY

s. -

CALCULATION NO. 22S-B-004E-166 PROJECT NO. 4950 PAGE NO.15 i

6.3.2.6.4 Non-random Errors Present in input Signals e2inputn e2inputn* = Ee1* ,

[6.3.1.5.6]

= +5609 x 10-3 Vdc e2inputn* = +5.609x104 Vdc i

e2inputn = Ee1-(6.3.1.5.7] l

= -5.609 x 10-3 Vdc I e2inputn = -5.609x104 Vdc 6.3.2.6.5 Total Positive Non-random Error Ien2+

Ien2+ = (eTn+) +(esn+) +(eVn+) +(e2inputn+)

=

(1983 x 10-3 Vdc)+02+02 +(5.609 x 10-3 Vde)

= +5.949 x 10-3 Vdc Ian2+ = +5.949x104 Vdc 6.3.2.6.6 Total Negative Non-random Error Een2-Ien2 = - (eTn~) +(eSn-) +(eVn-) +(e2inputn-)

=-

(1983 x 10-3 Vdc) + 02+02 + (5.609 x10-3 Vdc)

= -5.949 x 10-3 Vdc Ien2 = -5.949x104 Vdc -

REVISION NO. O NEP-1242 Revision 1 Exhibit E ism 11ms

~

9

COMMONWEALTH EDISON COMPANY g

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

-f 6.4 TOTAL INSTRUMENT CHANNEL ERROR Positive Normal Total Instrument Channel Error (Ten')

Ten * = 1. (+o2) + Ien2+ = 1. +5.236 x 10-3 Vdc + 5.949 x 10-3 Vdc

11.185 x 10-3 Vdc ti Ten .+

  • Vdc _ +11185 x 10-3 Vdc PSI S out 793.1 x 10-3 Vdc S 3000 psi in

= +42.3 psi Ten *g = +42.3 psi Negative Normal Total Instrument Channel Error (Ten-)

Ten = 1. (-a2) + Ien2 = 1. -5.236 x 10-3 Vdc + (-5.949 x 10-3 Vde)

-11.185 x 10-3 Vdc TenVdc _ -11185 x 10-3 Vdc Ten .

1 P81 S

- 793.1 x 10-3 Vdc out

  1. ni 3000 psi

,; = -423 psi Ten g = -42.3 psi

7.

SUMMARY

AND CONCLUSIONS The Total Loop Error to be considered in determining Low Temperature Overpressurization Protection Eagle-21 Setpoints is i 42.3 psi; based upon p'ressure signals from PT-403 and PT-405 under normal operating conditions. '

FINAL PAGE REVISION NO. O w .ta m m i Emwed E Imad: 11G048

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