ML12125A309

Calculation G-13.18-6.2-ENS*002, Revision 2, Instrument Loop Uncertainty/Setpoint Determination for the Abb Model 27H Undervoltage Relay

ML12125A309
Person / Time
Site:	River Bend
Issue date:	05/02/2012
From:	Entergy Operations
To:	Office of Nuclear Reactor Regulation
References
RBG-47236 G-13.18-6.2-ENS*002, Rev 2
Download: ML12125A309 (34)

Text

El ANO-1 El ANO-2 El GGNS [_ IP-2 El IP-3 0] PLP F- JAF [EI PNPS Z RBS El VY [E W3 F-1 NP-GGNS-3 F-1 NP-RBS-3 CALCULATION ( EC # 27437 (2) Page 1 of 2"7 COVER PAGE (3) Design Basis Calc. Z] YES El NO (4) Z] CALCULATION El EC Markup ( Calculation No: G13.18.6.2-ENS*002 Revision:

2 (7' Title: Instrument Loop Uncertainty/Setpoint Determination for the ABB Model ) Editorial 27H Undervoltage Relay El YES Z NO (9 System(s):

302 (10) Review Org (Department):

NSBE3 (I&C Design)(11) Safety Class: (12) Component/Equipment/Structure Type/N umber: Z] Safety / Quality Related Tp/ubr ENS-SWGIA-27-1A, IB, IC ENS-SWG1B-27-1A, 1B, 1C El Augmented Quality Program F-1 Non-Safety Related ENS-SWGIA-PT-BUS ENS-SWGIB-PT-BUS (13) Document Type: F43.02 (14) Keywords (Description/Topical Codes): relay, uncertainty REVIEWS (15) Name/Signature/Date (16) Name/Signature/Date (17) Name/Signature/Date Chuck Mohr Robin Smith Paul Matzke (see EC 11753 for signature) (see EC 11753 for signature) (see EC 11753 for signature)

Responsible Engineer Z Design Verifier Supervisor/Approval

[I Reviewer Z_ Comments Attached Z Comments Attached EN-DC-126 REV 4 SETPOINT CALCULATION ENGINEERING DEPARTMENT RIVER BEND STATION CALC. NO. -REV. ADDENDUM G13.18.6.2-ENS*002 Rev. 2 ENTERGY Page 2 of 27 CALCULATION REFERENCE CALCULATION NO: G. 13.18.6.2-ENS*002 SHEET REVISION:'

2______I. EC Markups Incorporated (N/A to NP calculations):

None II. Relationships:

Sht Rev Input Output Impact Tracking Doc Doc Y/N No.1. EN-DC-126

-- 002 0 13 N 2. EN-IC-S-007-R

-- 000 0 0 N 3. 7224.300-000-001B

-- 300 0 0 N 4. 201.130-186

-- 000 0 0 N 5.215.150

-- 006 0 0 N 6. B455-0139

-- 000 0 0 N 7. 3242.521-102-001A

-- 300 0 0 N 8. F137-0100

-- 000 0] 0 N 9. 0242.521-102-133

-- 300 0 0 N 10. EE-001K -- 019 0 0 N 11. EE-001L -- 015 0 0 N 12. ESK-08ENS01

-- 008 0 0 N 13. ESK-08EGS09 001 013 0] 0 N 14. ESK-08EGS10 001 012 0 01 N 15. ESK-08EGS13 001 011 0 i N 16. ESK-08EGS14 001 010 0 0 N 17. ESK-08EGS15 001 009 0 0 N 18. ESK-08EGS16 001 007 0 03 N 19. STP-302-1600

-- 018 0 0 N 20. STP-302-1601

-- 017 0 03 N 21. G13.18.6.3-006 000 1 0 N 22. LSK-24-09.05A 001 015 [] 0 N 23. EDP-AN-02

-- 300 [ ]N 24 T-0-0102 -- 016 [] [ N 2 5. G 13.18.3.1"*001

-- 003 [] 0 N SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 3 of 27 ENTERGY III. CROSS

REFERENCES:

1. Indus Asset Suite Equipment Data Base (EDB)2.Technical Specifications section B3.3.8.1 3. ANSI Standards C57.13 (1993)4. Multi-Amp Instruction Book EPOCH-10 5. USAR Figures 3.11-1 through 5 IV. SOFTWARE USED: N/A Title:_ Version/Release:

Disk/CD No.V. DISK/CDS INCLUDED:

N/A Title: Version/Release Disk/CD No.VI. OTHER CHANGES: Removed the following related references:

STP-302-1602, STP-302-1603, 242.251, 0242.521-102-060, 0242.521-102-061, 0242.521-102-063, 0242.521-102-064, 0242.521-102-070, 0242.521-102-071, 0242.521-102-076, 0242.521-102-084, 0242.521-102-129, ESK-08EGS01, Sh. 001, ESK-08EGS04, Sh. 001, BE-230A, BE-230B, CSD-24-09.05 SETPOINT CALCULATION ENGINEERING DEPARTMENT RIVER BEND STATION CALC. NO. -REV. ADDENDUM G13.18.6.2-ENS*002 Rev. 2 Page 4 of 27 ENTERGY Revision..

.. Record of Revision Initial issue to support determination of undervoltage rely setpoints by Electrical 0 Engineering.

Deleted Degraded Voltage Relay setpoints.

With relay change per ER-RB-2001-1 0360-00, the degraded voltage relay setpoints are moved to G13.18.3.6.2-ENS-005 Rev. 0. Revised procedural as-left band.2 Incorporated new drift value and extended calibration period to 30 months per EC 11753.

SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 ENTERGY RIVER BEND STATION Page 5 of 27 TABLE OF CONTENTS COVER SHEET CALCULATION REFERENCES RECORD OF REVISION SECTION PAGE 1.0 Purpose and Description.....................................................................................................

6 2.0 Results/Conclusions

.................................................................................................................

8 3.0 References

...............................................................................................................................

9 4.0 Design Inputs ............................................................................................................................

11 5.0 Nomenclature

............................................................................................................................

15 6.0 Calculation M ethodology

....................................................................................................

16 7.0 Assumptions

..............................................................................................................................

17 8.0 Calculation

................................................................................................................................

20 9.0 Simplified Block Diagram ...................................................................................................

27 Attachments:

1 Design Verification Form and Comments ....................................................

7 pages SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENTERGY ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 6 of 27 1.0 Purpose and Description

1.1. Purpose

The purpose of this calculation is to determine the uncertainty associated with the existing Safety-Related 4.16 kV Loss of Voltage relays for Divisions I & II. Nominal trip Set points and Allowable values will be determined by the Electrical Engineering group in calculation G13.18.3.1

• 001 and documented on the applicable BE drawing.1.2. Loop Descriptions Each 4.16 kV emergency bus has its own independent Loss of Power (LOP) instrumentation and associated trip logic. The voltage for the Division I and II buses is monitored at two levels, which can be considered as two different undervoltage functions; loss of voltage and sustained degraded voltage.Each 4.16 kV bus monitored by three undervoltage relays whose outputs are arranged in a two-out-of-three logic configuration (Reference 3.12). The channels include electronic equipment (e.g., trip units) that compares measured input signals with pre-established setpoints.

When the setpoint is exceeded, the channel output relay actuates, which then outputs a LOP trip signal to the trip logic.1.3. Design Bases Event Per Technical Specification Bases B 3.3.8.1 (Reference 3.7.3), "successful operation of the required safety functions of the Emergency Core Cooling Systems (ECCS) is dependent upon the availability of adequate power sources for energizing the various components such as pump motors, motor operated valves, and the associated control components.

The LOP instrumentation monitors the 4.16 kV emergency buses. Offsite power is the preferred source of power for the 4.16 kV emergency buses. If the monitors determine that insufficient power is available, the buses are disconnected from the offsite power sources and connected to the onsite diesel generator (DG) power sources." 1.4. Degree of Accuracy/Limits of Applicability The results of this calculation are based on the statistical methods of at least 95% probability of occurrence for a one sided probability distribution in accordance with "General Electric Instrument Setpoint Methodology," (Reference 3.3) and EN-IC-S-007-R, "Instrument Loop Uncertainty

& Setpoint Calculations" (Reference 3.2). One sided probability is used since the Loss of Voltage relay performs its safety function in the decreasing direction only.The results of this calculation are valid under the Assumptions stated in Section 7.0 of this calculation.

The appropriate use of this calculation to support design or station activities, other than those specified in Section 1.1 of this calculation, is the responsibility of the user.

SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM Few ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 ENTERGY RIVER BEND STATION Page 7 of 27 1.5. Applicability A data analysis has been performed in order to determine which, if any, redundant instrument loops are bounded by the results of this calculation.

This calculation is applicable to the Loops associated with the primary elements stated in Section 9.0. The results of this calculation are bounding for the applicable instrument loops, based on such factors as instrument manufacturer and model number, instrument location/environmental parameters, actual installation and use of the instrument in process measurements.

SETPOINT CALCULATION I CALC. NO. -REV. ADDENDUM ENTERGY ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 8 of 27 2.0 Results/Conclusions

2.1. Results

The Loop Uncertainty and Total Loop Uncertainty for the Loss of Voltage relays were calculated in Section 8.0. These values and other associated values such as loop drift are presented in table 2.1-1.Table 2.1-1 Loss of Voltage Relay System(s)

Loop Loop Channel Drift Total Loop M&TE Loop Maximum Identification Uncertainty (DL) Uncertainty Accuracy Loop (LU) VAC (TLU) Requirements Setting VAC VAC VAC Tol.(PALB)VAC See +/- 0.8675 + 1.019 Section 9.0 +/- 52.59* 0961.77*I* Uncertainty indexed to the primary (bus) voltage of the potential transformers.

2.2. Conclusions

The calculated Loop Uncertainty and Total Loop Uncertainty presented in table 2.1-1, are bounding for the relays and circuits listed in Section 9.0.

SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 ENTERGY RIVER BEND STATION Page 9 of 27 3.0 References 3.1 EN-DC- 126, "Engineering Calculation Process" 3.2 EN-IC-S-007-R, "Instrument Loop Uncertainty

& Setpoint Calculations" 3.3 7224.300-000-001B, NEDC-31336P-A, General Electric Instrument Setpoint Methodology

3.4 Indus

Asset Suite Equipment Data Base (EDB)3.5 201.130-186, "Peak Spreading of ARS Curves for the Control Building" 3.6 Environmental Design Criteria, Spec 215.150, including USAR figures 3.11-1 through 5 as outlined in EDP-AN-02 section 6.3.1 3.7 RBS Operating License 3.7.1 Not used 3.7.2 Not used 3.7.3 Bases Sections B3.3.8.1 3.7.4 Not used 3.8 RBS USAR None 3,9 Vendor Manuals 3.9.1 B455-0139, Single-Phase Voltage Relays 3.9.2 3242.521-102-001A, Instruction Manual-STNBY 4.16 kV Switchgear 3.9.3 F137-0100, Fluke Dual Display Multimeter Users Manual 3.9.4 Multi-Amp Instruction Book for the EPOCH-10, Microprocessor-Enhanced Protective Relay Test Set, (maintained by the Standards Laboratory) 3.9.5 0242.521-102-133, Rev. 300, BOM ENS-SWG1A

& lB1 3.10 Electrical Schematics 3.10.1 EE-001K, 4160V One Line Diagram Standby Bus IENS*SWG1A 3.10.2 EE-001L, 4160V One Line Diagram Standby Bus IENS*SWG1B 3.10.3 ESK-08ENS01, AC Elementary Diagram Standby Bus 1A & lB Protection

& Metering SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 ENTERGY RIVER BEND STATION Page 10 of 27 3.10.4 ESK-08EGS09, DC Elementary Diagram Standby Bus IENS*SWGIA Under Voltage Protection 3.10.5 ESK-08EGS10, DC Elementary Diagram Standby Bus IENS*SWG1B Under Voltage Protection 3.10.6 ESK-08EGS13, DC Elementary Diagram Standby Bus 1ENS*SWG1A Under Voltage Protection 3.10.7 ESK-08EGS14, DC Elementary Diagram Standby Bus IENS*SWG1B Under Voltage Protection 3.10.8 ESK-08EGS 15, DC Elementary Diagram Standby Bus 1ENS*SWGIA Under Voltage Protection

& Load Sequence 3.10.9 ESK-08EGS 16, DC Elementary Diagram Standby Bus 1ENS*SWG1B Under Voltage Protection

& Load Sequence 3.11 Surveillance Test Procedures:

3.11.1 STP-302-1600, ENS-SWG1A Loss Of Voltage Channel Calibration And Logic System Functional Test 3.11.2 STP-302-1601, ENS-SWG1B Loss Of Voltage Channel Calibration And Logic System Functional Test 3.11.3 Not used 3.11.4 Not used 3.11.5 STP-302-0102, Power Distribution System Operability Check 3.12 LSK-24-09.05A, Standby Diesel Generator Load Sequence, Logic Diagram 3.13 Standards 3.13.1 ANSI Standard C57.13, Requirements for Instrument Transformers 3.13.2 Not used 3.14 G13.18.6.3-006, Rev. 0, ABB Model ITE-27H Relay Drift Analysis SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 11 of 27 4.0 Design Input The following are the design inputs used to determine uncertainty for the DIV I and II Loss of Voltage relays.4.1 Loop Input 4.1.1 Loop Data: Form 1: Loop/Process Data Sheet Description Data Reference Loop Sensor(s)

ENS-SWG1A-PT 3.10 ENS-SWGIB-PT Location ENS-SWG1A 3.4 ENS-SWG 1B Output Range 0-120 VAC 3.10 Input Range 0-4200 VAC 3.10 4.1.2 Special Considerations:

4.1.2.1 Calibration shall be performed using the following instruments:

Multi-Amp EPOCH--10 relay tester set to Oscillator Mode (Reference 3.9.4)Fluke Model 45 Digital Multimeter set to Medium Resolution (Reference 3.9.3)4.1.2.2 A minimum of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> warm up time at the calibration location shall be allowed for the Fluke Model 45 Multimeter.

SETPOINT CALCULATION ENGINEERING DEPARTMENT RIVER BEND STATION CALC. NO. -REV. ADDENDUM G13.18.6.2-ENS*002 Rev. 2 ENTERGY Page 12 of 27 4.2 Loop Instrumentation Form 2: Instrument Data Sheet Calc. Device Number 1 Description Data Reference Component Number(s ENS-SWG1A-PT-BUS 34 ENS-SWG lB-PT-BUS Manufacturer Westinghouse 3.9.5 Model(s) VIY-60 3.9.5 Location(s)

CB 98'E1. /ENS-SWG1A 34 CB 98'E1. /ENS-SWG1B Service Description Transformer

3.4 Instrument

Range 0 -4200 VAC 3.9.5 Output Range 0 -120 VAC 3.9.5 Calibration Interval Evaluated N/A Note Device Setting Tolerance N/A Note Note: Potential transformers for instrument service cannot be calibrated or adjusted, therefore there is no device setting tolerance or calibration interval.I SETPOINT CALCULATION ENGINEERING DEPARTMENT RIVER BEND STATION CALC. NO. -REV. ADDENDUM G13.18.6.2-ENS*002 Rev. 2 ENTERGY Page 13 of 27 Form 2: Instrument Data Sheet Caic. Device Number 2 Description Data Reference Component Number(s)

See Section 9.0 3.4, 3.10 Manufacturer Asea Brown Boveri 3.9.5, 3.9.1 Model 27H 3.9.5, 3.9.1 Location(s)

CB 98'EL/ENS-SWG1A 34 CB 98'EL/ENS-SWG1B Service Description Relay 3.9.1, 3.10 Input Range 0 -120 VAC 3.9.2 Output Contact Action 3.10, 3.12 Calibration Interval Evaluated 30 Mo. 3.2 (24 Mo. + 25%)Loop Device Data Form 3: Instrument Accuracy Sheet Caic. Device Number 1 Westinghouse VIY-60 Description Data Reference 0.3% of setting 3.9.2 Reference Accuracy (RAT) 7.1.2 Seismic Effects (SET) N/A 7.1.4 Temperature Effects (TET) N/A 7.1.12 Insulation Resistance Effects (IRT) N/A 7.1.10 Temperature Drift Effect (TDT) N/A 7.1.13 Drift (DRT) N/A 7.1.14 4.3 SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENTERGY ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 14 of 27 Form 3: Instrument Accuracy Sheet Calc. Device Number 2 Asea Brown Boveri 27H Description Data Reference 3.9.1 Reference Accuracy (RAR) +/-0.25% of setting 7.1.2 7.1.15 Seismic Effects (SER) 0 7.1.4 Temperature Effects (TER) 0.5 VAC/(68 0 F -104°F) 7.1.12 Temperature__Effects_(T__)_7.1.2 Insulation Resistance Effects (IRR) N/A 7.1.10 Temperature Drift Effect (TDR) N/A 7.1.13 Drift (DRR) +/-0.392 VAC 3.14 7.1.2 3.11 Reset 3% of Setting 3.9.1 Reset _ +/-1.5% 3.9.1 3.9.5 I 4.4 Environmental Information Form 4: Environmental Conditions Data Sheet Zone: CB-98-1 Description Data Reference Location Building/Elevation CB-98 3.4 Room/Area Switchgear Room 3.4 Normal ......_____ ___ ___Temperature Range, 'F 40 -104 3.6 Humidity Range, %RH 20-90 3.6 Radiation 40 Year Total Integrated 800 3.6 Dose, Rads Pressure Range Atmos 3.6 Accident (Loss of Offsite Power) _ _ __ __ _Temperature Range, OF Same as Normal 3.6 Humidity Range, %RH Same as Normal 3.6 Radiation, Total Integrated Dose, Same as Normal 3.6 Rads Pressure Range Same as Normal 3.6 Seism ic _ _ _ _ _ _..... '_Accelerations, g < 3 3.5 I I SETPOINT CALCULATION ENGINEERING DEPARTMENT RIVER BEND STATION CALC. NO. -REV. ADDENDUM G13.18.6.2-ENS*002 Rev. 2 Page 15 of 27 ENTERGY 5.0 Nomenclature The terms and abbreviations that are not defined in this section are defined in Reference 3.3, Reference 3.2 or within the text of this calculation.

SETPOINT CALCULATION ENGINEERING DEPARTMENT RIVER BEND STATION CALC. NO. -REV. ADDENDUM G13.18.6.2-ENS*002 Rev. 2 ENTERGY Page 16 of 27 6.0 Calculation Methodology This calculation is prepared in accordance with EN-IC-S-007-R, "Instrument Loop Uncertainty

& Setpoint Calculations" (Reference 3.2), EN-DC-126, "Engineering Calculation Process" (Reference 3.1) and 7224.300-000-001B, "General Electric Instrument Setpoint Methodology" (Reference 3.3).

SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENTERGY ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 17 of 27 7.0 Assumptions

7.1 Assumptions

that do not require confirmation

7.1.1 Miscellaneous

Allowance (ML)A miscellaneous allowance has not been applied to uncertainty of the device evaluated by this calculation.

B te rounding of values in the conservative direction, sufficient conservatism has been introduced.

7.1.2 unless

otherwise specified.

7.1.3 Zero Effect (ZE)Not applicable

7.1.4 Seismic

Effects (SE)Reference

3.9.1 states

that the undervoltage relays have been tested to 6 g ZPA "without damage or malfunction." Reference

3.5 defines

the expected level of seismic activity for the 98 ft elevation of the control building as less than 3g. Therefore, seismic effects are assumed to be 0.Seismic effects are not applicable to potential transformers.

7.1.5 Radiation

Effects (RE) & Radiation Drift Effect (RD)Radiation effects and radiation drift effects are not applicable to the relays and transformers evaluated by this calculation, as they are located in a mild environment (Reference 3.6).7.1.6 Power Supply Effects (PS)Per Reference 3.9.1, control voltage variations may affect the setpoint of the relay by as much as+/- 0.2 volt for a 10 VDC change in the control voltage. This yields a jgossible variation of+/- 0.02 VAC/VDC of control voltage variation.

Per Reference 3.11.5, the allowable voltage range is 130 to 140 VDC. Therefore, 15 VDC will conservatively be used to calculate the PS effects for the undervoltage relays in this calculation.

Power supply effects are not applicable to transformers.

7.1.7 Process

Measurement Uncertainty (PM)Not Applicable SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 ENTERGY, RIVER BEND STATION Page 18 of 27 7.1.8 Static Pressure Effects (SP)Not Applicable

7.1.9 Humidity

Effects (HE)The relays were specified by the switchgear manufacturer and are assumed to be designed to withstand the environmental effects in the mounting location without introduction of additional uncertainty.

Per Reference 3.6, the humidity range for environmental zone CB-98 is 20 to 90%RH. Therefore, it is assumed that Humidity effects are negligible.

Humidity effects are not applicable to potential transformers.

7.1.10 Insulation Resistance Effects (IR)(IR) effects, which may result in degradation of circuit insulation, are not applicable to the devices and circuits addressed by this calculation.

7.1.11 Voltage Drop Voltage drop due to long wiring lengths between source and load are assumed to be negligible as the potential transformers and the undervoltage relays evaluated by this calculation are located in the same switch gear compartment.

7.1.12 Temperature Effects (TE)Per Reference 3.9.1, the temperature effect is 0.5 VAC over a span of 68' -104°F (20'C -40°C).Reference

3.6 states

that the normal temperature range for this area is 40' -104'F and that 1% of the calendar year (30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />) the temperature could be 5°F higher. The temperature change 1% of the calendar year is considered negligible.

The 0.5 VAC value will be used to determine relay temperature effects. See section 8.1.3 Temperature effects are not applicable to transformers.

Temperatures above the rated value would tend to produce total failure of the transformer, rather than an error in output.7.1.13 Temperature Drift Effects (TD)The drift analysis performed in Reference 3.14 is assumed to encompass all components of drift and drift effects except for temperature drift effects which are assumed to be included in the Reference Accuracy of the device.Temperature drift effects are not applicable to transformers.

7.1.14 Instrument Drift (DR)The drift analysis can be found in Reference 3.14.Drift is not applicable to transformers.

SETPOINT CALCULATION I CALC. NO. -REV. ADDENDUM-ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 ENTERGY RIVER BEND STATION Page 19 of 27 7.1.15 Relay Reference Accuracy (RAR)The accuracy rating for the ABB model 27 undervoltage relay is dependent on M&TE accuracy and calibration methodology when following the calibration instruction in Reference 3.9.1. Per Reference 3.9.3, the reference accuracy for a Fluke Model 45 digital multimeter is 0.2% of setting+ 10 mV (conservatively approximated as 0.01% of setting).

This yields an approximate accuracy of 0.21%. For conservatism, a value of 0.25% of setting will be used for this calculation.

7.2 Assumptions

that require confirmation None SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENGINEERING DEPARTMENT GI3.18.6.2-ENS*002 Rev. 2 ENTERGY RIVER BEND STATION Page 20 of 27 8.0 Calculation This section includes the following subsections used in performance of this calculation:

8.1) Calculation of Miscellaneous Uncertainties 8.2) Calculation of Individual Device Reference Accuracy (RA)8.3) Calculation of Individual Device Uncertainties 8.4) Calculation of Loop Calibration Accuracy (CL)8.5) Calculation of Insulation Resistance Effects (IR)8.6) Calculation of Loop Uncertainty (LU)8.7) Calculation of Loop Drift (DL 8.8) Calculation of Total Loop Uncertainty (TLU)8.9) Calculation of Reset Differential SETPOINT CALCULATION CALC- NO- -REV- ADDFNDIJM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 21 of 27 ENTERGY 8.1 Calculation of Miscellaneous Uncertainties

8.1.1 Calculation

of Transformer Burden and determination of Reference Accuracy Per References 3.9.2 and 3.13.1, the Reference Accuracy for instrument class potential transformers is +/- 0.3% W, X, and Y, and +/- 1.2% Z. This relates to the burden placed upon the transformer by its connected loads. A load less than 75 VA will yield an accuracy of+/- 0.3%where a load greater than 75 VA will produce a transformer accuracy of+/- 1.2%.The loads for the metering transformer are: 6 Undervoltage Relays @ 1.2 VA each = 7.2 1 Synchronizing relay transformer

@ 3 VA = 3.0 1 Model 60 Voltage Balance Relay @ 0.7 VA each = 0.7 2 Model 32 voltage Balance Relays @ 0.3 VA each = 0.6 1 Volt Meter, GE 180 @ 3.0 VA burden each = 3.0 1 Volt Transducer

@ 3.0 VA burden = 3.0 Control Relays/Meters not listed, Assumed Value = 10.0 30.5 Therefore Transformer Accuracy = 0.3% of setting 8.1.2 Calculation of Under Voltage Relay Power Supply Effects (PSg)PSR = + 0.2 VAC per 10 VDC control power variation= -0.02 VAC x 15 VDC=+/-0.3 VAC Assumed control power voltage variation is 15 VDC per Assumption 7.1.6.8.1.3 Calculation of Relay Temperature Effects (TER)Per Assumption 7.1.12 and Reference 3.9.1, the relay may experience a temperature effect of+0.5 VAC over a temperature range of 68 0 F -104'F. Assuming linearity, this yields an effect of 0.014 VAC/°F. The relays are housed inside the DIV I and II switchgear which are assumed to maintain an internal temperature of 104'F to prevent condensation.

However, the relay is calibrated in the electrical or relay shop which is assumed to be maintained at 707F. Therefore:

TER = +/- (104 0 F -70°F) x 0.014 VAC/°F= +/- 0.476 VAC 8.2 Calculation of Individual Device Reference Accuracy (RA)8.2.1 Transformer Reference Accuracy (RAr)..8.2.1.1 Transformer Reference Accuracy for Loss of Voltage (RATLV)

SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENTERGY ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 22 of 27 RATLV = + 0.3% of Setpoint= 0.003

• 49.00 VAC=-0.147 VAC 8.2.2 Undervoltage Relay Reference Accuracy (RAR): 8.2.2.1 Undervoltage Relay Accuracy for Loss of Voltage (RARLV)RARLV = + 0.25% of Setting= 0.0025

• 49 VAC+ 0.1225 VAC 8.2.3 Calculation of Loop Reference Accuracy (RAI)8.2.3.1 Loop Reference Accuracy for Loss of Voltage (RALLY)RALLV +/- [(RATLV)2 + (RARLV)2]1 2=+/- [(0.147)2

+ (0.1225)2]I/2

=+/-0.1914 VAC Per Reference 3.11 the Loop Calibration Tolerance (CTL) for Loss of Voltage (CTLV) is +/-0.87 VAC. Per reference 3.2, if the CTL or procedural as left band is greater than the Loop Reference accuracy (RAL), CTL should be used to determine the loop calibration tolerance (CTL) and the reference accuracies of the individual loop components may be set to zero.Therefore the RATLV will be set to 0 for the following sections of this calculation.

8.3 Calculation

of Individual Device Uncertainties (Reference 3.2, Section 8.2 and Section 8.1)8.3.1 .Transformer Uncertainty (AT)8.3.1.1 Transformer Uncertainty Loss of Voltage (ATLV)ATLV = +/- [(RATLv)2]1/2=+/-OVAC 8.3.2 Undervoltage Relay Device Uncertainty (AR)8.3.2.1 Undervoltage Relay Device Uncertainty for Loss of Voltage (ARv)ARLV +/- [(RARv)2 + (PSR) I + (TER)2]1/2+ [(0.1225)2

+ (0.3)2 + (0.476)-]

112= 0.5758 VAC 8.4 Calculation of Loop Calibration Accuracy (CL)CL +/- [(MTEL)2+ (CTL)2] 1/2 r r SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 23 of 27 ENTERGY L I 8.4.1 Calculating measuring and test equipment effects. (MTEJ)Measurement

& Test Equipment (MTEL) effects are defined from Reference 3.2 as: MTELv = [(MTE 1 A)2 + (MTERu)2 + (MTETE)2 + (MTEcs)2]" 2 Where: MTERA = Reference accuracy of the Fluke Model 45 Digital Multimeter (DMM)after a one hour stabilization period at the calibration location = 0.2% of setting + 10 mV. MTERALV = 0.108 VAC.MTETE = Effects of temperature changes on the Fluke Model 45 DMM between the calibration laboratory and the area where the M&TE is used. Assumed equal to the Reference accuracy of the M&TE used. For the Loss of Voltage, setting MTETELV = 0.108 VAC.MTER[ = Readability of the M&TE used, assumed to be 0 as all M&TE used are digital with at least 2 digital with at least 2 digits of resolution. (Reference 3.2)MTEcs = The accuracy of the calibration standard used to calibrate the M&TE, assumed equal to 1/4 the Reference accuracy of the DMM. For the Loss of Voltage, setting MTECSLV = 0.027 VAC.8.4.1.1 Calculation of loop M&TE Effects for Loss of Voltage (MTELLV)MTELLV = -[(MTERALV) 2 + (MTERI)2 + (MTETELV)2 + (MTEcsLv)2 11/2= [(0.108)2

+ (0.0)2 + (0.108)2 + (0.027)2 +]1/2=-0.155 VAC 8.4.2 Calculation of Calibration Effects (CTI)Calibration Effects (CTL) are defined from Reference 3.2 as: CTL = Square Root Sum of the Squares (SRSS) of procedural inaccuracies such as procedural as left band and calibration procedural errors.8.4.2.1 Calculation of Calibration effects for Loss of Voltage (CTLLV)CTLLV = -0.87 VAC The PALB value is 0.87 from Ref. 3.11. The PALB will remain greater than RAL.8.4.3 Calculation of Loop Calibration Accuracy for Loss of Voltage (C Lv)CLLV= +/- [(MTELLV)2 + (CTLLV)2] 1/2= +/- [(0.155)2

+ (0.87)2]1/2

= 0.884 VAC SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENTERGY ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 24 of 27 8.5 Calculation of Insulation Resistance Effects (IR)0 per Assumption 7.1.10 8.6 Calculation of Loop Uncertainty (LU)Reference

3.2 defines

loop uncertainty as: LU = +/- (m/n)[(AT) 2 + (AR)2 + (CL.)2]1/2 Where: m = The number of standard deviations required to encompass 95% of the area under the curve for a normal distribution either one or two sided. 1.645 corresponds to a one sided confidence while 2.00 corresponds to a two sided confidence.

n = The number of standard deviations used in specifying the individual components of uncertainty.

8.6.1 Loop Uncertainty for Loss of Voltage (LU v)LULV = -(m/n)[(ATLV) 2 + (ARLv)2 + (CLLv)2] 1/2= +/--(1.645/2)[(0)2

+ (0.5758)2

+ (0.884)2]1/2

--0.8675 VAC When applied to the PT primary voltage (LUPLV)LUPLV = +/- LULV x PT Ratio * (3)1/2 (Primary voltage/Secondary voltage)-+/-0.8675 x 35 x 1.73205-452.59 VAC 8.7 Calculation of Loop Drift (DL)8.7.1 Transformer Temperature Drift Effects (TD 1)0 per Assumption 7.1.13 8.7.2 Relay Temperature Drift Effects (TDR)0 per assumption 7.1.13 8.7.3 Relay Drift (DRK!.: DRR = +/- 0.392 VAC per Reference 3.14 As there are no other components of drift to be considered, DL = DRR Indexed to the PT primary voltage= DRR x 35 x (3)1/2= +/- 0.392 VAC x 35 x (3)%=+/- 23.77 VAC SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 25 of 27 8.8 Calculation of Total Loop Uncertainty (TLU)Reference

3.2 defines

loop uncertainty as: TLU = +/- (m/n)[(AT) 2 + (AR)2 + (CL)2 + (DL)2]112 8.8.1 Total Loop Uncertainty

-Loss of Voltage (TLULv_)TLULV +/- (m/n)[(ATLv) 2 + (ARLV)2 + (CLLV)2 + (DL)2]1 2 +/- M (Margin)= +/- (1.645/2)[(0)2

+ (0.5758)2

+ (0.884)2 + (0.392)2]I/2+/-

0.093+ 1.019 VAC When applied to the PT primary voltage (TLUPLV)TLUPLV = -TLULV x PT Ratio x (3) /2 (Primary voltage/Secondary voltage)-1.019 x 35 x 1.73205=+/-61.77 VAC 8.9 Calculation of Reset Differential

8.9.1 Reset

Differential for Loss of Voltage (RDL_)(Reference 3.9.1 and 3.11)RDLV = + (3.0% of Setting) nominal= + 0.03 x 49.00= + 1.47 VAC nominal Indexed to the PT primary voltage= RDLV x 35 x (3)1/2= 89.10 VAC nominal RDLV = + (3.0% + 1.5% of Setting) max= + 0.045 x 49.00= + 2.205 VAC max Indexed to the PT primary voltage= RDLV x 35 x (3)112= 133.67 VAC Max Calculated uncertainties (LU and TLU) are applicable to reset.

SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 ENTERGY RIVER BEND STATION Page 26 of 27 Summary of Calculation Transformer Undervoltage Relay Device 1 Device 2 Values Ref. Values Ref.Input Range 0-4200 -3.9.5 0- 120 -3.9.2 Process Units VAC -3.9.5 VAC -3.9.2 7.1.15 Reference Accuracy (RA) +/-0.3% of Setting 2 3.9.2 +/-0.25% of Setting 2 7.1.12 Temperature Effect (TE) 0 -7.1.12 +/-0.476 2 7.1.3 8.1.3 Seismic Effects (SE) N/A -7.1.4 0 -7.1.4 Radiation Effect (RE) N/A -7.1.5 N/A -7.1.5 Instrument Drift (DR) N/A -7.1.14 +/-0.392 2 3.14, 7.1.14 Temperature Drift (TD) N/A -7.1.13 N/A -7.1.13 Radiation Drift Effect N/A -7.1.5 N/A -7.1.5 (RD)Power Supply Effect (PS) N/A -7.1.6 +/- 0.3 2 7.1.6, 8.1.2 Static Pressure Effects (SP) N/A -7.1.8 N/A -7.1.8 Humidity Effects (HE) N/A -7.1.9 N/A -7.1.9 Process Measurement N/A -7.1.7 N/A -7.1.7 Effect (PM)Insulation Resistance N/A -7.1.10 N/A -7.1.10 Effect (IR) I I_ II_Zero Effect (ZE) N/A -7.1.3 N/A -7.1.3 I SETPOINT CALCULATION CALC. NO. -REV. ADDENDUM ENTERGY ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 27 of 27 9.0 Simplified Block Diag-ram Potential Transformer Undervoltage Relay Westinghouse Model VIY-60 4200/120 VAC ABB Model 27H Relay Mark Numbers Div. I ENS-SWG1A-27-IA ENS-SWGIA-27-1B ENS-SWG1A-27-1C Transformer Mark Number ENS-SWG 1A-PT-BUS Div H SWG 1 B-27-1A SWG1B-27-lB SWGIB-27-IC Loss off Voltage Loss off Voltage Loss off Voltage ENS-SWG lB-PT-BUS I ATTACHMENT

9.1 DESIGN

VERIFICATION COVER PAGE Sheet I of I DESIGN VERIFICATION COVER PAGE E] ANO-1 [I ANO-2 Li IP-2 [] IP-3 Li JAF LI PLP[- PNPS LI VY LI GGNS ZRBS El W3 LINP Document No. G13.18.6.2-ENS-002 Revision No. 2 Page 1 of 4 Title: Loop Uncertainty/Setpoint Determinhtion for the ABB Model 27H Undervoltage Relay Z Quality Related Li Augmented Quality Related DV Method: Z Design Review E] Alternate Calculation Li Qualification Testing VERIFICATION REQUIRED DISCIPLINE VERIFICATION COMPLETE AND COMMENTS RESOLVED (DV print, sign, and date)D] Electrical D] Mechanical Instrument and Control Robin Smith D] Civil/Structural

-Nuclear Originator:

Charles Mohr (l 'Z. / o Print/Sign/Date After Comments Have Been Resolved EN-DC-134 REV 2 ATTACHMENT

9.6 DESIGN

VERIFICATION CHECKLIST ATTACHMENT

9.6 DESIGN

VERIFICATION CHECKLIST Sheet I of 3 IDENTIFICATION:

DISCIPLINE:

Document Title: Loop Uncertainty/Setpoint Determination for the ABB Model 27H 'LCivil/Structural Undervoltage Relay ElElectrical Doc. No.: G13.18.6.2-ENS-002 Rev 2 QA Cat.: SR lMechanical Robin Smith 7 Verifier:

Print Sign Date r-other Manager authorization for supervisor performing Verification.

0 N/A Print Sign Date METHOD OF VERIFICATION:

Design Review 0 Alternate Calculations E] Qualification Test Dl The following basic questions are addressed as applicable, during the performance of any design verification.

[ANSI N45.2.11 -1974] [NP] [QAPD, Part II, Section 3] [ NQA-l-1994, Part II, BR 3, Supplement 3s-1].NOTE The reviewer can use the "Comments/Continuation sheet" at the end for entering any comment/resolution along with the appropriate question number. Additional items with new question numbers can also be entered.1. Design Inputs -Were the inputs correctly selected and incorporated into the design?(Design inputs include design bases, plant operational conditions, performance requirements, regulatory requirements and commitments, codes, standards, field data, etc. All information used as design inputs should have been reviewed and approved by the responsible design organization, as applicable.

All inputs need to be retrievable or excerpts of documents used should be attached.See site specific design input procedures for guidance in identifying inputs.)YesO No [ N/A El 2. Assumptions

-Are assumptions necessary to perform the design activity adequately described and reasonable?

Where. necessary, are assumptions identified for subsequent re-verification when the detailed activities are completed?

Are the latest applicable revisions of design documents utilized?Yes Z No E] N/A 0 3. Quality Assurance

-Are the appropriate quality and quality assurance requirements specified?

Yes ED No [ N/A [EN-DC-134 REV 2 ATTACHMENT

9.6 DESIGN

VERIFICATION CHECKLIST Sheet 2 of 3 4. Codes, Standards and Regulatory Requirements

-Are the applicable codes, standards and regulatory requirements, including issue and addenda properly identified and are their requirements for design met?Yes ED No [] N/A E-5. Construction and Operating Experience

-Have applicable construction and operating experience been considered?

Yes El No 0 N/A 0 6. Interfaces

-Have the design interface requirements been satisfied and documented?

Yes El No C] N/A 0 7. Methods -Was an appropriate design or analytical (for calculations) method used?Yes 0 No El N/A 17 8. Design Outputs -Is the output reasonable compared to the inputs?Yes 0 No .. N/A [I 9. Parts, Equipment and Processes

-Are the specified parts, equipment, and processes suitable for the required application?

Yes El No El N/A 0 10. Materials Compatibility

-Are the specified materials compatible with each other and the design environmental conditions to which the material will be exposed?Yes E] No 0 N/A 0 11. Maintenance requirements

-Have adequate maintenance features and requirements been specified?

Yes El No Cl N/A 0 12. Accessibility for Maintenance

-Are accessibility.and other design provisions adequate for performance of needed maintenance and repair?Yes El No 0 N/A M 13. Accessibility for In-service Inspection

-Has adequate accessibility been provided to perform the in-service inspection expected to be required during the plant life?Yes 0 No El N/A 0 14. Radiation Exposure -Has the design properly considered radiation exposure to the public and plant personnel?

Yes E] No [ N/A 0 15. Acceptance Criteria -Are the acceptance criteria incorporated in the design documents sufficient to allow verification that design requirements have been satisfactorily accomplished?

Yes 0 No Fl N/A r-16. Test Requirements

-Have adequate pre-operational and subsequent periodic test requirements been appropriately specified?

Yes El No El N/A Z EN-DC-134 REV 2 ATTACHMENT

9.6 DESIGN

VERIFICATION CHECKLIST Sheet 3 of 3 17. Handling, Storage, Cleaning and Shipping -Are adequate handling, storage, cleaning and shipping requirements specified?

Yes E] No El N/A 0 18. Identification Requirements

-Are adequate identification requirements specified?

Yes C] No 0 N/A ED 19. Records and Documentation

-Are requirements for record preparation, review, approval, retention, etc., adequately specified?

Are all documents prepared in a clear legible manner suitable for microfilming and/or other documentation storage method? Have all impacted documents been identified forupdate as necessary?

Yes Z No 0 N/A M 20. Software Quality Assurance-ENN sites: For a calculation that utilized software applications (e.g., GOTHIC, SYMCORD), was it properly verified and.validated in accordance with EN- IT-1 04 or previous site SQA Program?ENS sites: This is an EN-IT-1 04 task. However, per ENS-DC-126, for exempt software, was it verified in the calculation?

Yes C] No E] N/A Z 21. Has adverse impact on peripheral components and systems, outside the boundary of the document being verified, been considered?

Yes [ No 0 N/A 0 EN-DC-134 REV 2 ATTACHMENT

9.7 DESIGN

VERIFICATION COMMENT SHEET Sheet 1 of I Comments Continuation Sheet Question Comments Resolution Initial/Date 1 Comments provided by markup for Comments resolved to the /calculation G. 13.18.6.2-ENS*002.

satisfaction of the reviewer.EN-DC-1 34 REV 2 DESIGN VERIFICATION COMMENT SHEET SHEET 1 OF 1 Calculation G1 3.18.6.2-ENS*002, Rev. 002 (EOI Review Comments)Comments / Continuation Sheet Question Comments Resolution Initial/Date 1 Fix formatting in Section 7 and 8. Fixed formatting and indentation Assumption and Subsection headers problem.are indented to the right.2 Move Assumption 7.1.15 title to top of Moved assumption 7.1.15 next page to stay with text response.3 In equation 8.8.1 change (.64) to Revised equation to read 0.5758 (0.64). for LU change back to original value. See #4 below.4 TLU error went down and LU error Corrected LU revising the went up. Since this calc affects assumption for temperature effect.G13.18.3.1*001 and potentially the TS, Revised TLU adding margin to you may consider revising this calc to make result match existing keep the TLU and LU values the same. number.The LU only changed due to the revised normal max temp of 109 0 F.However, you could have left it as 104 0 F by stating in the assumptions that although the normal maximum design temperature of the zone will be exceeded by 5*F approximately 1 percent of the calendar year (30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />), this change is negligible and 104 0 F will be used in the calculation.

TLU can be increased by adding margin. Keep this in mind when you review G 13.18.3.1

• 001 for revision.

DESIGN VERIFICATION COMMENT SHEET SHEET 1 OF 1 Calculation G13.18.6.2-ENS*002, Rev. 002 (E0I Review Comments, Second Round)Comments / Continuation Sheet Question Comments Resolution Initial/Date 1 Assumption 7.1.12 states in the last Now reads: "The 0.5 VAC value sentence that "this value will be will be used to determine relay used..." Clarify that the 0.5 VAC is the temperature effects."_ value that will be used. I I