Text

Licensee Calculations Related to License Amendment Request to Revise TS 3.3.8.1, Loss of Power Instrumentation, to Extend Frequency of SR 3.3.8.1.3 and Revise AVs for Certain Functions
	ML12261A491
Person / Time
Site:	River Bend
Issue date:	01/31/2012
From:	Williamson D; Entergy Operations
To:	Wang A; Plant Licensing Branch IV
	Wang A
References
	TAC ME7767
	Download: ML12261A491 (154)
	v • d • e

From: WILLIAMSON, DANNY H To: Wang, Alan

Subject:

FW: -004/-005 calcs Date: Tuesday, January 31, 2012 3:28:34 PM Attachments: G13.18.6.2-ENS_002_0_002.pdf G13.18.6.2-ENS_004_0_001.pdf G13.18.6.2-ENS_006_0_001.pdf G13.18.6.2-ENS_007_0_001.pdf G13.18.3.1-004 Rev 0.pdf G13.18.3.1-005 Rev 0.pdf Alan As we understood the discussion last week, the attached is the entirety of what was requested. Please let me know if you need anything else.

Danny

ANO-1 ANO-2 GGNS IP-2 IP-3 PLP JAF PNPS RBS VY W3 NP-GGNS-3 NP-RBS-3 (1) (2)

CALCULATION EC # LAR Page 1 of 12 COVER PAGE (3) Design Basis Calc. YES NO (4) CALCULATION EC Markup (5 ) (6)

Calculation No: G13.18.3.1-004 Revision: 0 (7 ) (8)

Title:

Degraded Voltage Relay Setpoints for ENS-SWG01A and ENS- Editorial SWG01B YES NO (9) (10)

System(s): 302 Review Org (Department): Electrical Design Engineering (11) (12)

Safety Class: Component/Equipment/Structure Type/Number:

Safety / Quality Related ENS-SWG1A-62-2 ENS-SWG1B-62-2 Augmented Quality Program ENS-SWG1A-27-1A, 1B, 1C ENS-SWG1B-27-1A, 1B, 1C Non-Safety Related (13)

Document Type: F43.02 (14)

Keywords (Description/Topical Codes): degraded voltage relay, setpoint, GE setpoint methodology REVIEWS (15) (16) (17)

Name/Signature/Date Name/Signature/Date Name/Signature/Date Charles Blackledge/See IAS Greg Svestka/See IAS Jason Arms/See IAS Responsible Engineer Design Verifier Supervisor/Approval Reviewer Comments Attached Comments Attached

SETPOINT CALCULATION G13.18.3.1-004 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 2 OF 12 CALCULATION REFERENCE CALCULATION NO: G13.18.3.1-004 SHEET REVISION: 0 I. EC Markups Incorporated (N/A to NP calculations)

1. None II. Relationships: Sht Rev Input Output Impact Tracking No.

Doc Doc Y/N

1. STP-302-1600 -- 20 Y

2. STP-302-1601 -- 20 Y

3. STP-302-1602 -- 23 Y

4. STP-302-1603 -- 24 Y

5. G13.18.6.2-ENS*002 0 002 N EC-27437

6. G13.18.6.2-ENS*006 0 001 N EC-27437

7. G13.18.3.6*016 -- 002 N

8. G13.18.3.1*001 -- 003 Y

9. RBS Technical Specifications Table -- Y 3.3.8.1-1

10. RBS Technical Requirements Manual -- Y Table 3.3.8.1-1 III. CROSS

REFERENCES:

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:

SETPOINT CALCULATION G13.18.3.1-004 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 3 OF 12 Revision Record of Revision Initial issue.

0 The purpose of this calculation markup is to provide the Degraded Voltage LAR Submittal Relay NO-LOCA time delay and Loss of Voltage Relay dropout voltage setpoints, and Technical Specification and TRM limits.

SETPOINT CALCULATION G13.18.3.1-004 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 4 OF 12 TABLE OF CONTENTS 5.0 PURPOSE......................................................................................................................................................................... 5

6.0 CONCLUSION

S............................................................................................................................................................... 5 7.0 INPUT AND DESIGN CRITERIA .................................................................................................................................. 5 8.0 ASSUMPTIONS ............................................................................................................................................................... 7 9.0 CALCULATION METHODOLOGY.............................................................................................................................. 7 10.0 CALCULATION.............................................................................................................................................................. 8

SETPOINT CALCULATION G13.18.3.1-004 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 5 OF 12 5.0 Purpose The purpose of this calculation markup is to provide the Degraded Voltage Relay NO-LOCA time delay and Loss of Voltage Relay dropout voltage setpoints, and Technical Specification and TRM limits.

6.0 Conclusions The following table shows the new revised Technical Specification limits.

Specification Existing Values Revised Values T.S. 3.3.8.1-1 1a 2850 V and 3090 V 3005 V and 3302 V T.S. 3.3.8.1-1 1d 53.4 s and 66.6 s 46.59 s and 57.07 s TRM 3.3.8.1-1 1a 2910 V and 3030 V 3105 V TRM 3.3.8.1-1 1d 54 s and 66 s 52.55 s 7.0 Input and Design Criteria 7.1. Div 1 and 2 Degraded Voltage Relays (Voltage Function)

Relay: ENS-SWG1A-62-2 ENS-SWG1A-27-1A, 1B, 1C ENS-SWG1B-62-2 ENS-SWG1B-27-1A, 1B, 1C ENS-SWG1A-62-2 ENS-SWG1A-27-1A, 1B, 1C Input Reference Document ENS-SWG1B-62-2 ENS-SWG1B-27-1A, 1B, 1C G13.18.6.2-ENS*006 Loop Uncertainty (LU) +/-3.22 s 0.8675 V G13.18.6.2-ENS*002 G13.18.6.2-ENS*006 Total Loop Uncertainty (TLU) +/-3.795 s 1.019 V G13.18.6.2-ENS*002 G13.18.6.2-ENS*006 Max. Loop Setting Tol. (CTL) +/-3 s 0.87 V G13.18.6.2-ENS*002 G13.18.6.2-ENS*006 Current Setpoint 57.8 s 49 V G13.18.6.2-ENS*002 7.2. Analytical Limits For ENS-SWG1A-62-2 and ENS-SWG1B-62-2 Analytical Limit = 60 s (Ref: G13.18.3.6*016)

For ENS-SWG1A-27-1A, 1B, 1C and ENS-SWG1B-27-1A, 1B, 1C Analytical Limit = 2950 VAC (Ref: G13.18.3.6*016) Maximum dropout for the Loss of Voltage Relays = 3318.27 VAC

SETPOINT CALCULATION G13.18.3.1-004 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 6 OF 12 7.3. Bus to Relay Voltage Conversion The Division 1 & 2 Degraded Voltage bus (4160 kV) to relay input voltage conversion factor is (35 *

3) (References ESK-08ENS01, ESK-08EGS09, ESK-08EGS10, G13.18.6.2-ENS*002 and G13.18.6.2-ENS*006).

7.4.Output Documents (Any Changes to the data, analyses, or conclusions of calculation G13.18.3.1-004 may impact the following RBS documents) 7.4.1. RBS Technical Specification and Technical Requirements Manual 7.4.1.1 TS 3.3.8.1, Loss of Power (LOP) Instrumentation.

7.4.1.2 TR 3.3.8.1, Loss of Power (LOP) Instrumentation.

7.4.2. Procedures 7.4.2.1 STP-302-1600, ENS-SWG1A Loss of Voltage Channel Calibration and Logic System Functional Test.

7.4.2.2 STP-302-1601, ENS-SWG1B Loss of Voltage Channel Calibration and Logic System Functional Test.

7.4.2.3 STP-302-1602, ENS-SWG1A Degraded Voltage Channel Calibration and Logic System Functional Test.

7.4.2.4 STP-302-1603, ENS-SWG1B Degraded Voltage Channel Calibration and Logic System Functional Test.

7.5. Operating Experience CR-RBS-2011-04838:

CR-RBS-2011-04838 documented non-conservative Technical Specification for Degraded Voltage Relay NO-LOCA time delay and Loss of Voltage Relay dropout setpoints. The condition report documented that the existing limits do not protect the RBS motors against sustained degraded voltage conditions for a long period of time.

Disposition: This engineering change markup has been issued to provide revised Technical Specification and TRM setpoint limits for the Degraded Voltage Relay NO-LOCA time delay and Loss of Voltage Relay dropout setpoints. The new setpoint limits provided within this markup will ensure that the RBS motors are protected against sustained undervoltage and degraded voltage conditions.

SETPOINT CALCULATION G13.18.3.1-004 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 7 OF 12 8.0 Assumptions 8.1. The Limiting Operating Transient Variation (XT) is assumed to be equal to the minimum voltage observed during a LOCA transient at the Lower Analytical Limit for the Degraded Voltage Relays (See calculation G13.18.3.6*016). Thus, the setpoint should be such that the Loss of Voltage relays do not dropout during a degraded grid LOCA transient.

The Limiting Operating Transient Variation (XT) is given by the following equations (Ref: EN-IC-S-007-R):

The minimum voltage during a transient is observed for Division I bus. This voltage is 3318.27 VAC (Section 7.2). Therefore, XT = 3318.27 /(35 x 3) = 54.73 VAC (Ref: Section 7.3 for bus to relay voltage conversion).

8.2. The LU, TLU and reset differential, derived in calculation G13.18.6.2-ENS*002 and G13.18.6.2-ENS*006 (EC-27437), are calculated using instrument uncertainties that are based on % setting (%

setpoint). Because the proposed setpoints are different from the existing, those uncertainties will increase. Therefore, this calculation will adjust the LU, TLU and reset differential values proportionally according to the increase in setpoint.

9.0 Calculation Methodology The methodology used in this calculation is in accordance with the Instrument Loop Uncertainty &

Setpoint Calculations (Ref: EN-IC-S-007-R) and General Electric Instrument Setpoint Methodology (Ref: 7224.300-000-001B).

The Allowable Values (AV) and Nominal Trip Setpoints (NTSP2) for the setpoints considered in this calculation have both upper and lower limits. The Lower Limit (AV MIN) is calculated for the Degraded Voltage Relay NO-LOCA time delay by subtracting the difference between the AV MAX and the NTSP2 from the NTSP2. Then an additional margin of 3% is applied to give the final value of AV MIN. The Upper Limit (AV MAX) is calculated for the Loss of Voltage Relay Dropout by adding the difference between the NTSP2 and AV MIN to the NTSP2. An additional margin of 3% is applied to give the final value of AV MAX. Spurious trip avoidance analysis will ensure that these relays, if found drifted in the upper/lower limit not calculated, will not trip under unanalyzed conditions.

The upper AV for the Degraded Voltage Relay NO-LOCA time delay (AV MAX) must be below the upper Analytical Limit (AL) minus the absolute value of the positive Loop Uncertainty (LU). The lower AV for the Loss of Voltage Relay Dropout (AV MIN) must be above the lower AL plus the absolute value of the negative LU.

Upper AV Upper AL - +LU Lower AV Lower AL + -LU

SETPOINT CALCULATION G13.18.3.1-004 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 8 OF 12 The upper NTSP2 must be below the upper AL minus the absolute value of the positive Total Loop Uncertainty (TLU). The lower NTSP2 must be above the lower AL plus the absolute value of the negative TLU.

Upper NTSP2 Upper AL - +TLU Lower NTSP2 Lower AL + -TLU The Loop Uncertainties and Total Loop Uncertainties used as input to this calculation are developed in the Loop Uncertainty Determination calculation (Ref: G13.18.6.2-ENS*002 and G13.18.6.2-ENS*006 EC-27437) using the methodologies provided in EN-IC-S-007-R and 7224.300-000-001B.

The Maximum Loop Setting Tolerance (CTLV) provides the tolerance for the desired setpoint of the relay.

This tolerance is irrespective of the setpoint chosen and is, therefore, the same for the dropout and the reset values. The minimum and maximum for the Desired/TRM allowable value is calculated as follows:

Desired Max. = Desired/TRM Trip Value + CTLV Desired Min. = Desired/TRM Trip Value - CTLV 10.0 Calculation 10.1. Degraded Voltage Relay No-LOCA time delay relay The setpoint for the relays is calculated iteratively as the LU and TLU are proportional to the setpoint.

The final Nominal setpoint (NTSP2) calculated iteratively is 52.55 s.

Following calculations below provide the calculated STP, Allowable Value and Nominal Trip Setpoints (NTSP2). A margin of 4 s is used for LER Avoidance LU = 3.22 x New Setpoint/Current Setpoint LU = 3.22 x 52.55/57.8 = 2.93 s TLU = 3.795 x 52.55/57.8 = 3.450 s AV MAX Upper AL - +LU = 60 - 2.93 = 57.07 s AV MIN (NTSP2 - (AV MAX - NTSP2)) x 0.97 = (52.55 - (57.07 - 52.55)) x 0.97 = 46.59 s NTSP2 (TRM) Upper AL - +TLU - LER Avoidance Margin = 60 - 3.450 - 4 = 52.55 s STP MIN = NTSP2 - lCTLl = 52.55 - 3 = 49.55 s STP MAX = NTSP2 + lCTLl = 52.55 + 3 = 55.55 s 10.2. Loss of Voltage Relay The setpoint for the relays is calculated iteratively as the LU and TLU are proportional to the setpoint.

The final Nominal setpoint (NTSP2) calculated iteratively is 51.23 VAC.

SETPOINT CALCULATION G13.18.3.1-004 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 9 OF 12 Following calculations below provide the calculated STP, Allowable Value and Nominal Trip Setpoints (NTSP2). A margin of 1.5 V is used for LER Avoidance.

LU = 0.8675x New Setpoint/Current Setpoint LU = 0.8675 x 51.23/49 = 0.9067 VAC TLU = 1.019 x 51.23/49 = 1.07 VAC AV MIN Lower AL + +LU = 2950 / (35 x 3) + 0.9067 = 48.66 + 0.9067 = 49.57 VAC (rounded up)

AV MAX (NTSP2 + (NTSP2 - AV MIN)) x 1.03 = (51.23 + (51.23 - 49.57)) x 1.03 = 54.48 VAC NTSP2 (TRM) Lower AL + +TLU + LER Avoidance Margin = 48.66 + 1.07 + 1.5 = 51.23 VAC STP MIN = NTSP2 - lCTLl = 51.23 - 0.87 = 50.36 VAC STP MAX = NTSP2 + lCTLl = 51.23 + 0.87 = 52.1 VAC 10.3. Margin Checks:

10.3.1. Spurious Trip Avoidance Test The Spurious Trip Analysis is performed to demonstrate the acceptability of the calculated Nominal Trip Setpoint. The Nominal Trip Setpoint should provide at least 95% probability that a spurious trip will not occur. The value calculated for Z should be = 1.645 to achieve the 95% criteria.

Spurious Trip Equation (Ref: EN-IC-S-007-R):

NTSP 2 XT ZT 2 2 M I Where:

NTSP2 = Calculated Nominal Trip Setpoint, Upper XT = Limiting operating transient M = standard deviation for the operating transient (equal to zero when the limiting operating transient is based on documented operating conditions).

=0 I = standard deviation of the NTSP2

SETPOINT CALCULATION G13.18.3.1-004 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 10 OF 12 1

= ( AN ) 2 (C L ) 2 ( DL ) 2 ( PM ) 2 ( PE ) 2 n

The Total Loop Uncertainty is defined in EN-IC-S-007-R as:

m TLU = ( AL ) 2 (C L ) 2 ( DL ) 2 ( PM ) 2 ( PE ) 2 n

AL = Total random uncertainty that makes up the loop from device (provided in G13.18.2.3-ENS*002 and G13.18.2.3-ENS*006 EC-27437)

AN = The loop from device uncertainty for normal conditions (i.e. AL determined for normal conditions)

AL AN Since, a higher value of I reduces the spurious trip avoidance probability, therefore, it is conservative to assume that AN = AL for the equation for standard deviation.

TLU 1 I = = ( AL ) 2 (C L ) 2 ( DL ) 2 ( PM ) 2 ( PE ) 2 m n Since, TLU as provided in G13.18.6.2-ENS*002 and G13.18.6.2-ENS*002, contains the m

same random component, ( AL ) 2 (C L ) 2 ( DL ) 2 ( PM ) 2 ( PE ) 2 , for both positive n

and negative direction, I = +TLU / m m = 1.645 (for Loss of Voltage relay)

= 2 (for Degraded Voltage Relay No-LOCA time delay)

I = 1.07 / 1.645 V

= 0.650 V (for Loss of Voltage Relay)

= 3.45 / 2 s

= 1.725 s (for Degraded Voltage Relay No-LOCA time delay; used in Section 10.3.2.1) 10.3.1.1 Degraded Voltage Relay No-LOCA time delay relay Spurious trip avoidance test for the time delay is bounded by the spurious trip avoidance for the Loss of Voltage relay dropout setpoint. The purpose the Loss of voltage relays is to ensure that the RBS safety related motors will not experience less than 70% terminal voltage.

SETPOINT CALCULATION G13.18.3.1-004 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 11 OF 12 The time delay ensures that, if such a condition occurs, the degraded voltage relay trips in less than 60 seconds. This condition is based on the analysis provided in calculation G13.18.3.6*016. There are no other conditions that are dependent upon the Time Delay function of the relay. However, a spurious trip avoidance test for the Loss of Voltage relays is required to ensure that the relays do not dropout during worst case LOCA transient conditions.

10.3.1.2 Loss of Voltage relay The Spurious Trip Analysis is performed to demonstrate the acceptability of the calculated Nominal Trip Setpoint. The Nominal Trip Setpoint should provide at least 95% probability that a spurious trip will not occur. The value calculated for Z should be = 1.645 to achieve the 95% criteria.

NTSP2 = Calculated Nominal Trip Setpoint

= 51.23 (Per Section 10.2)

XT = Limiting operating transient

= 54.73 V (Per Assumption 8.1.1)

M = standard deviation for the operating transient (equal to zero when the limiting operating transient is based on documented operating conditions).

=0 I = +TLU / m m = 1.645 I = 1.07 / 1.645 V

= 0.650 V Spurious Trip Calculation:

ZT = l 51.23 - 54.73 l

((0)2 + (0.650)2)1/2

= 5.38 The calculated value for ZT is greater than the required 1.645. Therefore the calculated Nominal Trip Setpoint is acceptable.

SETPOINT CALCULATION G13.18.3.1-004 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 12 OF 12 10.3.2. LER Avoidance Analysis:

LER avoidance analysis is performed to determine the acceptability of the margin between the calculated Nominal Trip Setpoint and the calculated Allowable Value. The margin should provide at least a 90% probability the instrument channels trip setpoint will not exceed the allowable value. The calculated value for ZLER should be 1.28.

LER Avoidance Equation (Ref: EN-IC-S-007-R):

AV NTSP2 Z LER I

Where:

AV = Allowable Value NTSP2 = Calculated Nominal Trip Setpoint I = standard deviation of the NTSP 10.3.2.1 Degraded Voltage Relay No-LOCA time delay relay ZLER l57.07 - 52.55l 1.725

= 2.62 10.3.2.2 Loss of Voltage relay ZLER l49.57 - 51.23l 0.65 2.56 The LER Avoidance values are equal to or above 1.28. The calculated values for ZLER (upper and lower) are deemed acceptable and demonstrate sufficient probability for LER avoidance.

ANO-1 ANO-2 GGNS IP-2 IP-3 PLP JAF PNPS RBS VY W3 NP-GGNS-3 NP-RBS-3 (1) (2)

CALCULATION EC # LAR Page 1 of 12 COVER PAGE (3) Design Basis Calc. YES NO (4) CALCULATION EC Markup (5 ) (6)

Calculation No: G13.18.3.1-005 Revision: 0 (7 ) (8)

Title:

Degraded Voltage Relay Setpoints for E22-S004 Editorial YES NO (9) (10)

System(s): 302 Review Org (Department): Electrical Design Engineering (11) (12)

Safety Class: Component/Equipment/Structure Type/Number:

Safety / Quality Related Augmented Quality Program E22-S004-ACB4-62S5 E22-S004-ACB4-62S6 Non-Safety Related E22-S004-27N1 E22-S004-27N2 (13)

Document Type: F43.02 (14)

Keywords (Description/Topical Codes): degraded voltage relay, setpoint, GE setpoint methodology REVIEWS (15) (16) (17)

Name/Signature/Date Name/Signature/Date Name/Signature/Date Charles Blackledge/See IAS Greg Svestka/See IAS Jason Arms/See IAS Responsible Engineer Design Verifier Supervisor/Approval Reviewer Comments Attached Comments Attached

SETPOINT CALCULATION G13.18.3.1-005 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 2 OF 13 CALCULATION REFERENCE CALCULATION NO: G13.18.3.1-005 SHEET REVISION: 0 I. EC Markups Incorporated (N/A to NP calculations)

1. None II. Relationships: Sht Rev Input Output Impact Tracking No.

Doc Doc Y/N

1. STP-302-1604 -- 21 Y

2. STP-302-1605 -- 25 Y

3. G13.18.6.2-ENS*004 0 001 N EC-27437

4. G13.18.6.2-ENS*007 0 001 N EC-27437

5. G13.18.3.6*016 -- 002 N EC-31715

6. G13.18.3.1*002 -- 003 Y

7. RBS Technical Specifications Table -- Y 3.3.8.1-1

8. RBS Technical Requirements Manual -- Y Table 3.3.8.1-1 III. CROSS

REFERENCES:

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:

SETPOINT CALCULATION G13.18.3.1-005 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 3 OF 13 Revision Record of Revision Initial issue.

0 The purpose of this calculation markup is to provide the Degraded Voltage LAR Submittal Relay NO-LOCA time delay and Loss of Voltage Relay dropout voltage setpoints, and Technical Specification and TRM limits.

SETPOINT CALCULATION G13.18.3.1-005 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 4 OF 13 TABLE OF CONTENTS 5.0 PURPOSE......................................................................................................................................................................... 5

6.0 CONCLUSION

S............................................................................................................................................................... 5 7.0 INPUT AND DESIGN CRITERIA .................................................................................................................................. 5 8.0 ASSUMPTIONS ............................................................................................................................................................... 7 9.0 CALCULATION METHODOLOGY.............................................................................................................................. 7 10.0 CALCULATION.............................................................................................................................................................. 8

SETPOINT CALCULATION G13.18.3.1-005 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 5 OF 13 5.0 Purpose The purpose of this calculation markup is to provide the Degraded Voltage Relay NO-LOCA time delay and Loss of Voltage Relay dropout voltage setpoints, and Technical Specification and TRM limits.

6.0 Conclusions The following table shows the new revised Technical Specification limits.

Specification Existing Values Revised Values T.S. 3.3.8.1-1 2a 2831 V and 3259 V 3019 V and 3325 V T.S. 3.3.8.1-1 2d 53.4 s and 66.6 s 44.7 s and 54.83 s TRM 3.3.8.1-1 2a 2892 V and 3198 V 3158 V TRM 3.3.8.1-1 2d 54 s and 66 s 50.49 s 7.0 Input and Design Criteria 7.1. Div 3 Degraded Voltage Relays (Voltage Function)

Relay: E22-S004-ACB4-62S5 E22-S004-ACB4-62S6 E22-S004-27N1 E22-S004-27N2 E22-S004-ACB4-62S5 E22-S004-27N1 Input Reference Document E22-S004-ACB4-62S6 E22-S004-27N2 G13.18.6.2-ENS*007 Loop Uncertainty (LU) +/-5.622 s 3.678 V G13.18.6.2-ENS*004 G13.18.6.2-ENS*007 Total Loop Uncertainty (TLU) +/-5.99 s 5.31 V G13.18.6.2-ENS*004 G13.18.6.2-ENS*007 Max. Loop Setting Tol. (CTL) +/-3 s 2.61 V G13.18.6.2-ENS*004 G13.18.6.2-ENS*007 Current Setpoint 54.9 s 87 V G13.18.6.2-ENS*004 7.2. Analytical Limits For E22-S004-ACB4-62S5 and E22-S004-ACB4-62S6 Analytical Limit = 60 s (Ref: G13.18.3.6*016)

For E22-S004-27N1 and E22-S004-27N2 Analytical Limit = 2935 VAC Maximum dropout for the Loss of Voltage Relays = 3351 VAC

SETPOINT CALCULATION G13.18.3.1-005 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 6 OF 13 7.3. Bus to Relay Voltage Conversion The Division 3 Degraded Voltage bus (4160 kV) to relay input voltage conversion factor is (35) (Ref:

G13.18.6.2-ENS*004 and G13.18.6.2-ENS*007).

7.4.Output Documents (Any Changes to the data, analyses, or conclusions of calculation G13.18.3.1-005 may impact the following RBS documents) 7.4.1. RBS Technical Specification and Technical Requirements Manual 7.4.1.1 TS 3.3.8.1, Loss of Power (LOP) Instrumentation.

7.4.1.2 TR 3.3.8.1, Loss of Power (LOP) Instrumentation.

7.4.2. Procedures 7.4.2.1 STP-302-1605, HPCS DEGRADED VOLTAGE CHANNEL CALIBRATION AND LOGIC SYSTEM FUNCTIONAL TEST.

7.4.2.2 STP-302-1604, HPCS LOSS OF VOLTAGE CHANNEL CALIBRATION AND LOGICSYSTEM FUNCTIONAL TEST.

7.5. Operating Experience CR-RBS-2011-04838:

CR-RBS-2011-04838 documented non-conservative Technical Specification for Degraded Voltage Relay NO-LOCA time delay and Loss of Voltage Relay dropout setpoints. The condition report documented that the existing limits do not protect the RBS motors against sustained degraded voltage conditions for a long period of time.

Disposition: This engineering change markup has been issued to provide revised Technical Specification and TRM setpoint limits for the Degraded Voltage Relay NO-LOCA time delay and Loss of Voltage Relay dropout setpoints. The new setpoint limits provided within this markup will ensure that the RBS motors are protected against sustained undervoltage and degraded voltage conditions.

SETPOINT CALCULATION G13.18.3.1-005 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 7 OF 13 8.0 Assumptions 8.1. The Limiting Operating Transient Variation (XT) is assumed to be equal to the minimum voltage observed on the associated bus during a LOCA transient at the Lower Analytical Limit for the Degraded Voltage Relays (See calculation G13.18.3.6*016). Thus, the setpoint should be such that the Loss of Voltage relays do not dropout during a degraded grid LOCA transient.

The Limiting Operating Transient Variation (XT) is given by the following equations (Ref: EN-IC-S-007-R):

The minimum voltage during a transient is observed for Division I bus. This voltage is 3351 VAC (Section 7.2). Therefore, XT = 3351 /(35) = 95.75 VAC (Ref: Section 7.3 for bus to relay voltage conversion).

8.2. The LU, TLU and reset differential, derived in calculation G13.18.6.2-ENS*004 and G13.18.6.2-ENS*007 (EC-27437), are calculated using instrument uncertainties that are based on % setting (%

setpoint). Because the proposed setpoints are different from the existing, those uncertainties will increase. Therefore, this calculation will adjust the LU, TLU and reset differential values proportionally according to the increase in setpoint.

9.0 Calculation Methodology The methodology used in this calculation is in accordance with the Instrument Loop Uncertainty &

Setpoint Calculations (Ref: EN-IC-S-007-R) and General Electric Instrument Setpoint Methodology (Ref: 7224.300-000-001B).

The Allowable Values (AV) and Nominal Trip Setpoints (NTSP2) for the setpoints considered in this calculation have both upper and lower limits. The Lower Limit (AV MIN) is calculated for the Degraded Voltage Relay NO-LOCA time delay by subtracting the difference between the AV MAX and the NTSP2 from the NTSP2. Then an additional margin of 3% is applied to give the final value of AV MIN. The Upper Limit (AV MAX) is calculated for the Loss of Voltage Relay Dropout by adding the difference between the NTSP2 and AV MIN to the NTSP2. An additional margin of 3% is applied to give the final value of AV MAX. Spurious trip avoidance analysis will ensure that these relays, if found drifted in the upper/lower limit not calculated, will not trip under unanalyzed conditions.

The upper AV for the Degraded Voltage Relay NO-LOCA time delay (AV MAX) must be below the upper Analytical Limit (AL) minus the absolute value of the positive Loop Uncertainty (LU). The lower AV for the Loss of Voltage Relay Dropout (AV MIN) must be above the lower AL plus the absolute value of the negative LU.

Upper AV Upper AL - +LU Lower AV Lower AL + -LU The upper NTSP2 must be below the upper AL minus the absolute value of the positive Total Loop Uncertainty (TLU). The lower NTSP2 must be above the lower AL plus the absolute value of the negative TLU.

SETPOINT CALCULATION G13.18.3.1-005 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 8 OF 13 Upper NTSP2 Upper AL - +TLU Lower NTSP2 Lower AL + -TLU The Loop Uncertainties and Total Loop Uncertainties used as input to this calculation are developed in the Loop Uncertainty Determination calculation (Ref: G13.18.6.2-ENS*004 and G13.18.6.2-ENS*007 EC-27437) using the methodologies provided in EN-IC-S-007-R and 7224.300-000-001B.

The Maximum Loop Setting Tolerance (CTLV) provides the tolerance for the desired setpoint of the relay.

This tolerance is irrespective of the setpoint chosen and is, therefore, the same for the dropout and the reset values. The minimum and maximum for the Desired/TRM allowable value is calculated as follows:

Desired Max. = Desired/TRM Trip Value + CTLV Desired Min. = Desired/TRM Trip Value - CTLV 10.0 Calculation 10.1. Degraded Voltage Relay No-LOCA time delay relay The setpoint for the relays is calculated iteratively as the LU and TLU are proportional to the setpoint.

The final Nominal setpoint (NTSP2) calculated iteratively is 50.49 s.

The following calculations below provide the calculated STP, Allowable Value and Nominal Trip Setpoints (NTSP2). A margin of 4 s is used for LER Avoidance LU = 5.622 x New Setpoint/Current Setpoint LU = 5.622 x 50.49/54.9 = 5.17 s TLU = 5.99 x 50.49/54.9 = 5.51 s AV MAX Upper AL - +LU = 60 - 5.17 = 54.83 s AV MIN (NTSP2 - (AV MAX - NTSP2)) x 0.97 = (50.49 - (54.83 - 50.49)) x 0.97 = 44.7 s (rounded down)

NTSP2 (TRM) Upper AL - +TLU - LER Avoidance Margin = 60 - 5.51 - 4 = 50.49 s STP MIN = NTSP2 - lCTLl = 50.49 - 3 = 47.49 s STP MAX = NTSP2 + lCTLl = 50.49 + 3 = 53.49 s 10.2. Loss of Voltage Relay The setpoint for the relays is calculated iteratively as the LU and TLU are proportional to the setpoint.

The final Nominal setpoint (NTSP2) calculated iteratively is 90.24 VAC.

The following calculations below provide the calculated STP, Allowable Value and Nominal Trip Setpoints (NTSP2). A margin of 0.865 V is used for LER Avoidance. For LU, Calculation

SETPOINT CALCULATION G13.18.3.1-005 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 9 OF 13 G13.18.6.2-ENS*004 shows an additional margin of 1.392. This margin is removed in this setpoint calculation.

LU = (3.678-1.392) x New Setpoint/Current Setpoint LU = (3.678-1.392) x 90.24/87 = 2.37 VAC TLU = 5.31 x 90.24/87 = 5.51 VAC AV MIN Lower AL + +LU = 2935 / (35) + 2.37 = 83.86 + 2.37 = 86.23 VAC (rounded up)

AV MAX (NTSP2 + (NTSP2 - AV MIN)) x 1.03 = (90.24 + (90.24 - 86.23)) x 1.03 = 97.08 VAC 97.08 VAC x 35 = 3397.8 VAC Since AV MAX is calculated to be 3397.8 VAC, which is not within the Limiting Operating Transient Variation (assumption 8.1) for the Loss of Voltage Relays (3351 VAC), AV MAX will be chosen to be 3325 VAC to provide adequate margin to the Limiting Operating Transient Variation for the Loss of Voltage Relays.

NTSP2 (TRM) Lower AL + +TLU + LER Avoidance Margin = 83.86 + 5.51 + 0.865 = 90.24 VAC (Rounded Up)

STP MIN = NTSP2 - lCTLl = 90.24 - 2.61 = 87.63 VAC STP MAX = NTSP2 + lCTLl = 90.24 + 2.61 = 92.85 VAC

SETPOINT CALCULATION G13.18.3.1-005 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 10 OF 13 10.3. Margin Checks:

10.3.1. Spurious Trip Avoidance Test The Spurious Trip Analysis is performed to demonstrate the acceptability of the calculated Nominal Trip Setpoint. The Nominal Trip Setpoint should provide at least 95% probability that a spurious trip will not occur. The value calculated for Z should be = 1.645 to achieve the 95% criteria.

Spurious Trip Equation (Ref: EN-IC-S-007-R):

NTSP 2 XT ZT 2 2 M I Where:

NTSP2 = Calculated Nominal Trip Setpoint, Upper XT = Limiting operating transient M = standard deviation for the operating transient (equal to zero when the limiting operating transient is based on documented operating conditions).

=0 I = standard deviation of the NTSP2 1

= ( AN ) 2 (C L ) 2 ( DL ) 2 ( PM ) 2 ( PE ) 2 n

The Total Loop Uncertainty is defined in EN-IC-S-007-R as:

m TLU = ( AL ) 2 (C L ) 2 ( DL ) 2 ( PM ) 2 ( PE ) 2 n

AL = Total random uncertainty that makes up the loop from device (provided in G13.18.2.3-ENS*002 and G13.18.2.3-ENS*006 EC-27437)

AN = The loop from device uncertainty for normal conditions (i.e. AL determined for normal conditions)

AL AN Since a higher value of I reduces the spurious trip avoidance probability, it is conservative to assume that AN = AL for the equation for standard deviation.

SETPOINT CALCULATION G13.18.3.1-005 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 11 OF 13 TLU 1 I = = ( AL ) 2 (C L ) 2 ( DL ) 2 ( PM ) 2 ( PE ) 2 m n Since, TLU as provided in G13.18.6.2-ENS*004 and G13.18.6.2-ENS*007, contains the m

same random component, ( AL ) 2 (C L ) 2 ( DL ) 2 ( PM ) 2 ( PE ) 2 for both positive n

and negative direction, I = +TLU / m m = 1.645 (for Loss of Voltage relay)

= 2 (for Degraded Voltage Relay No-LOCA time delay)

I = 5.51 / 1.645 V

= 3.35 V (for Loss of Voltage Relay)

= 5.51 / 2 s (for Degraded Voltage Relay No-LOCA time delay; used in Section 10.3.2.1)

= 2.755 s (for Degraded Voltage Relay No-LOCA time delay) 10.3.1.1 Degraded Voltage Relay No-LOCA time delay relay Spurious trip avoidance test for the time delay is bounded by the spurious trip avoidance for the Loss of Voltage relay dropout setpoint. The purpose the Loss of voltage relays is to ensure that the RBS safety related motors will not experience less than 70% terminal voltage.

The time delay ensures that, if such a condition occurs, the degraded voltage relay trips in less than 60 seconds. This condition is based on the analysis provided in calculation G13.18.3.6*016. There are no other conditions that are dependent upon the Time Delay function of the relay. However, a spurious trip avoidance test for the Loss of Voltage relays is required to ensure that the relays do not dropout during worst case LOCA transient conditions.

10.3.1.2 Loss of Voltage relay The Spurious Trip Analysis is performed to demonstrate the acceptability of the calculated Nominal Trip Setpoint. The Nominal Trip Setpoint should provide at least 95% probability that a spurious trip will not occur. The value calculated for Z should be = 1.645 to achieve the 95% criteria.

NTSP2 = Calculated Nominal Trip Setpoint

= 90.24 V (Per Section 10.2)

SETPOINT CALCULATION G13.18.3.1-005 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 12 OF 13 XT = Limiting operating transient

= 95.75 V (Per Assumption 8.1.1)

M = standard deviation for the operating transient (equal to zero when the limiting operating transient is based on documented operating conditions).

=0 I = +TLU / m m = 1.645 I = 5.51 / 1.645 V

= 3.35 V Spurious Trip Calculation:

ZT = l90.24 - 95.75l

((0)2 + (3.35)2)1/2

= 1.6448 The calculated value for ZT is approximately 1.645. Therefore the calculated Nominal Trip Setpoint is acceptable.

10.3.2. LER Avoidance Analysis:

LER avoidance analysis is performed to determine the acceptability of the margin between the calculated Nominal Trip Setpoint and the calculated Allowable Value. The margin should provide at least a 90% probability the instrument channels trip setpoint will not exceed the allowable value. The calculated value for ZLER should be 1.28.

LER Avoidance Equation (Ref: EN-IC-S-007-R):

AV NTSP2 Z LER I

Where:

AV = Allowable Value NTSP2 = Calculated Nominal Trip Setpoint I = standard deviation of the NTSP

SETPOINT CALCULATION G13.18.3.1-005 ENGINEERING DEPARTMENT Rev. 0 RIVER BEND STATION PAGE 13 OF 13 10.3.2.1 Degraded Voltage Relay No-LOCA time delay relay ZLER l50.49 -54.83l 2.755

= 1.575 10.3.2.2 Loss of Voltage relay ZLER l 86.23 -90.24l 3.35 1.20 The LER Avoidance value for Degraded Voltage relay No-LOCA time delay is not greater than 1.28. However, the LER avoidance for Loss of Voltage relay is 1.20 which yields a probability of 88.5%. The STP limits on the relays ensure that the relays will not drift beyond the acceptable STP values.

The calculated values for ZLER (upper and lower) are deemed acceptable and demonstrate sufficient probability for LER avoidance.

ANO-1 ANO-2 GGNS IP-2 IP-3 PLP JAF PNPS RBS VY W3 NP-GGNS-3 NP-RBS-3 (1) (2)

CALCULATION EC # 27437 Page 1 of 27 COVER PAGE (3) Design Basis Calc. YES NO (4) CALCULATION EC Markup (5 ) (6)

Calculation No: G13.18.6.2-ENS*002 Revision: 2 (7) (8)

Title:

Instrument Loop Uncertainty/Setpoint Determination for the ABB Model Editorial 27H Undervoltage Relay YES NO (9) (10)

System(s): 302 Review Org (Department): NSBE3 (I&C Design)

(11) (12)

Safety Class: Component/Equipment/Structure Type/Number:

Safety / Quality Related ENS-SWG1A-27-1A, 1B, 1C ENS-SWG1B-27-1A, 1B, 1C Augmented Quality Program Non-Safety Related ENS-SWG1A-PT-BUS ENS-SWG1B-PT-BUS (13)

Document Type: F43.02 (14)

Keywords (Description/Topical Codes):

relay, uncertainty REVIEWS (15) (16) (17)

Name/Signature/Date Name/Signature/Date 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 Design Verifier Supervisor/Approval Reviewer Comments Attached Comments Attached EN-DC-126 REV 4

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION 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 N

2. EN-IC-S-007-R -- 000 N

3. 7224.300-000-001B -- 300 N

4. 201.130-186 -- 000 N

5. 215.150 -- 006 N

6. B455-0139 -- 000 N

7. 3242.521-102-001A -- 300 N

8. F137-0100 -- 000 N

9. 0242.521-102-133 -- 300 N

10. EE-001K -- 019 N

11. EE-001L -- 015 N

12. ESK-08ENS01 -- 008 N

13. ESK-08EGS09 001 013 N

14. ESK-08EGS10 001 012 N

15. ESK-08EGS13 001 011 N

16. ESK-08EGS14 001 010 N

17. ESK-08EGS15 001 009 N

18. ESK-08EGS16 001 007 N

19. STP-302-1600 -- 018 N

20. STP-302-1601 -- 017 N

21. G13.18.6.3-006 -- 000 N

22. LSK-24-09.05A 001 015 N

23. EDP-AN-02 -- 300 N

24. STP-302-0102 -- 016 N

25. G13.18.3.1*001 -- 003 N

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 3 of 27 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 CALC. NO. - REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 4 of 27 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.

Incorporated new drift value and extended calibration period to 30 months per EC 2 11753.

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 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 Methodology .........................................................................................................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 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 ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 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 CALC. NO. - REV. ADDENDUM 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 +/- 1.019 302 +/- 0.392 +/- 0.155 +/- 0.87 Section 9.0 +/- 52.59* +/- 61.77*

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

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 10 of 27 3.10.4 ESK-08EGS09, DC Elementary Diagram Standby Bus 1ENS*SWG1A Under Voltage Protection 3.10.5 ESK-08EGS10, DC Elementary Diagram Standby Bus 1ENS*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 1ENS*SWG1B Under Voltage Protection 3.10.8 ESK-08EGS15, DC Elementary Diagram Standby Bus 1ENS*SWG1A Under Voltage Protection & Load Sequence 3.10.9 ESK-08EGS16, 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 ENS-SWG1A-PT Loop Sensor(s) 3.10 ENS-SWG1B-PT ENS-SWG1A Location 3.4 ENS-SWG1B 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 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months warm up time at the calibration location shall be allowed for the Fluke Model 45 Multimeter.

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION 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 3.4 ENS-SWG1B-PT-BUS Manufacturer Westinghouse 3.9.5 Model(s) VIY-60 3.9.5 Location(s) CB 98E1. /ENS-SWG1A 3.4 CB 98E1. /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.

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 13 of 27 Form 2: Instrument Data Sheet Calc. 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 98EL/ENS-SWG1A 3.4 CB 98EL/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 30 Mo.

Calibration Interval Evaluated 3.2 (24 Mo. + 25%)

4.3 Loop Device Data Form 3: Instrument Accuracy Sheet Calc. 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

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM 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

+/-0.25% of setting Reference Accuracy (RAR) 7.1.2 7.1.15 Seismic Effects (SER) 0 7.1.4 0.5 VAC/(68oF - 104oF) 7.1.12 Temperature Effects (TER) 7.1.2 Insulation Resistance Effects (IRR) N/A 7.1.10 Temperature Drift Effect (TDR) N/A 7.1.13

+/-0.392 VAC 3.14 Drift (DRR) 7.1.2 3.11 3% of Setting Reset 3.9.1

+/-1.5%

3.9.5 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, oF 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 Seismic Accelerations, g <3 3.5

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 15 of 27 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 CALC. NO. - REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION 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 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 possible 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 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 68o - 104oF (20oC - 40oC).

Reference 3.6 states that the normal temperature range for this area is 40o - 104oF and that 1% of the calendar year (30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ) the temperature could be 5oF 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 CALC. NO. - REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 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 G13.18.6.2-ENS*002 Rev. 2 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. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 21 of 27 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 (PSR)

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 68oF - 104oF. Assuming linearity, this yields an effect of 0.014 VAC/oF. The relays are housed inside the DIV I and II switchgear which are assumed to maintain an internal temperature of 104oF to prevent condensation. However, the relay is calibrated in the electrical or relay shop which is assumed to be maintained at 70oF. Therefore:

TER = +/- (104oF - 70oF) x 0.014 VAC/oF

= +/- 0.476 VAC 8.2 Calculation of Individual Device Reference Accuracy (RA) 8.2.1 Transformer Reference Accuracy (RAT):

8.2.1.1 Transformer Reference Accuracy for Loss of Voltage (RATLV)

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM 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 (RAL) 8.2.3.1 Loop Reference Accuracy for Loss of Voltage (RALLV)

RALLV = +/- [(RATLV)2 + (RARLV)2]1/2

= +/- [(0.147)2 + (0.1225)2]1/2

= +/-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

= +/- 0 VAC 8.3.2 Undervoltage Relay Device Uncertainty (AR) 8.3.2.1 Undervoltage Relay Device Uncertainty for Loss of Voltage (ARLV)

ARLV = +/- [(RARLV )2 + (PSR)2 + (TER)2]1/2

= +/- [(0.1225)2 + (0.3)2 + (0.476)2]1/2

= +/- 0.5758 VAC 8.4 Calculation of Loop Calibration Accuracy (CL)

CL +/- [(MTEL)2 + (CTL)2]1/2

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 23 of 27 8.4.1 Calculating measuring and test equipment effects. (MTEL)

Measurement & Test Equipment (MTEL) effects are defined from Reference 3.2 as:

MTELV = [(MTERA)2 + (MTERI)2 + (MTETE)2 + (MTECS)2]1/2 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.

MTERI = 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]1/2

= +/- [(0.108)2 + (0.0)2 + (0.108)2 + (0.027)2 +]1/2

= +/- 0.155 VAC 8.4.2 Calculation of Calibration Effects (CTL)

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 (CLLV)

CLLV= +/- [(MTELLV)2 + (CTLLV)2]1/2

= +/- [(0.155)2 + (0.87)2]1/2

= 0.884 VAC

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM 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 (LULV)

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

= +/- 52.59 VAC 8.7 Calculation of Loop Drift (DL) 8.7.1 Transformer Temperature Drift Effects (TDT) 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 (DRR):

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)1/2

= +/- 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]1/2 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]1/2 +/- 0.093

= +/- 1.019 VAC When applied to the PT primary voltage (TLUPLV)

TLUPLV = +/- TLULV x PT Ratio x (3)1/2 (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 (RDLV)

(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)1/2

= 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 RIVER BEND STATION Page 26 of 27 Summary of Calculation Transformer Undervoltage Relay Terms 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 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)

Zero Effect (ZE) N/A - 7.1.3 N/A - 7.1.3

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM ENGINEERING DEPARTMENT G13.18.6.2-ENS*002 Rev. 2 RIVER BEND STATION Page 27 of 27 9.0 Simplified Block Diagram Potential Transformer Undervoltage Relay Westinghouse ABB Model 27H Model VIY-60 4200/120 VAC Relay Mark Numbers Div. I Div II ENS-SWG1A-27-1A SWG1B-27-1A Loss off Voltage ENS-SWG1A-27-1B SWG1B-27-1B Loss off Voltage ENS-SWG1A-27-1C SWG1B-27-1C Loss off Voltage Transformer Mark Number ENS-SWG1A-PT-BUS ENS-SWG1B-PT-BUS

DESIGN VERIFICATION COMMENT SHEET SHEET 1 OF 1 Calculation G13.18.6.2-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°F.

However, you could have left it as 104°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 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ), this change is negligible and 104°F will be used in the calculation.

TLU can be increased by adding margin. Keep this in mind when you review G13.18.3.1*001 for revision.

DESIGN VERIFICATION COMMENT SHEET SHEET 1 OF 1 Calculation G13.18.6.2-ENS*002, Rev. 002 (EOI 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.

ANO-1 ANO-2 GGNS IP-2 IP-3 PLP JAF PNPS RBS VY W3 NP-GGNS-3 NP-RBS-3 (1) (2)

CALCULATION EC # 27437 Page 1 of 22 COVER PAGE (3) Design Basis Calc. YES NO (4) CALCULATION EC Markup (5 ) (6)

Calculation No: G13.18.6.2-ENS*004 Revision: 1 (7) (8)

Title:

Loop Uncertainty Determination for DIV III Loss of Voltage Relays - Editorial GE Model NGV Undervoltage Relay YES NO (9) (10)

System(s): 302 Review Org (Department): NSBE3 (I&C Design)

(11) (12)

Safety Class: Component/Equipment/Structure Type/Number:

Safety / Quality Related E22-S004-27N1 E22-S004-27N2 Augmented Quality Program Non-Safety Related (13)

Document Type: F43.02 (14)

Keywords (Description/Topical Codes):

uncertainty, calculation REVIEWS (15) (16) (17)

Name/Signature/Date Name/Signature/Date Name/Signature/Date Chuck Mohr Justin Waters Paul Matzke (see EC 11753 for signature) (see EC 11753 for signature) (see EC 11753 for signature)

Responsible Engineer Design Verifier Supervisor/Approval Reviewer Comments Attached Comments Attached EN-DC-126 REV 4

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 2 OF 22 RIVER BEND STATION CALCULATION REFERENCE CALCULATION NO: G.13.18.6.2-ENS*004 SHEET REVISION: 1 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 ! " N

2. EN-IC-S-007-R -- 000 ! " N

3. 7224.300-000-001B -- 300 ! " N

4. 201.130-186 -- 000 ! " N

5. 215.150 -- 006 ! " N

6. G080-1344 -- 000 ! " N

7. 6221.418-000-001A -- 300 ! " N

8. F137-0100 -- 000 ! " N

9. 0221.418-000-008 -- 300 ! " N

10. EE-001M -- 009 ! " N

11. GE-828E537AA 003 028 ! " N

12. GE-828E537AA 007 030 ! " N

13. GE-828E537AA 008 028 ! " N

14. GE-828E537AA 011 029 ! " N

15. STP-302-1604 -- 018 ! " N

16. GE-152D8167 005 004 ! " N

17. G13.18.6.3-012 -- 000 ! " N

18. EDP-AN-02 -- 300 ! " N

19. G13.18.3.1*002 -- 004 " ! Y EC11753

20. GE-152D8167 003 006 ! " N

21. GE-152D8167 003A 006 ! " N

22. GE-152D8167 004 007 ! " N

23. BE-230D -- 010 ! " N

24. 0221.418-000-049 -- 300 ! " N

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 3 OF 22 RIVER BEND STATION 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), C37.90 (1989)

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: The following related references have been removed:

3221.418-000-003U, 0221.415-000-122, GE-828E537AA #006, GE-DL828E537AA, STP-302-0102

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 4 OF 22 RIVER BEND STATION Revision Record of Revision Initial issue to support determination of loss of voltage relay setpoints by 0

Electrical Engineering Incorporated new drift value and extended calibration period to 30 months per EC 1 11753.

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 5 OF 22 RIVER BEND STATION TABLE OF CONTENTS COVER SHEET CALCULATION REFERENCES RECORD OF REVISION SECTION PAGE 1.0 Purpose and Description.................................................................................................................. 6 2.0 Results/Conclusion.......................................................................................................................... 7 3.0 References ....................................................................................................................................... 8 4.0 Design Input .................................................................................................................................. 10 5.0 Nomenclature ................................................................................................................................ 13 6.0 Calculation Methodology.............................................................................................................. 14 7.0 Assumptions.................................................................................................................................. 15 8.0 Calculation .................................................................................................................................... 17 9.0 Simplified Block Diagram .......................................................................................................... 222 Attachments:

1 E-mail message from General Electric Power Management to George Boles 1 page 2 Design Verification Form and Comments6 pages

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 6 OF 22 RIVER BEND STATION 1.0 Purpose and Description 1.1. Purpose The purpose of this calculation is to determine the uncertainty associated with the existing Division III, Safety-Related, 4.16 kV Loss of Voltage relays E22-27N1 and 27N2. Nominal trip Setpoints and Allowable values will be determined by the Electrical Engineering group in calculation G13.18.3.1*002 and documented on the applicable BE drawing.

1.2. Loop Descriptions The DIV. III incoming Normal Supply power is monitored by two undervoltage relays (27N1 and 27N2) whose outputs are arranged in a one-out-of-two logic configuration (Reference 3.10.3). The channels include electronic equipment (e.g., trip units) that compare measured input signals with pre-established setpoints. When the setpoint is exceeded, the channel output relay actuates, opens the DIV III Normal Supply source breaker.

The Division III 4.16 kV emergency bus has its own independent Loss of Voltage instrumentation and associated trip logic. The DIV III emergency bus is monitored by undervoltage relays 27S1 through 27S4) whose outputs are arranged in a one-out-of-two, twice logic configuration (Reference 3.10.3).

1.3. Design Bases/Design Bases Event Per 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 of 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).

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.

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 2.1. 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 CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 7 OF 22 RIVER BEND STATION 2.0 Results/Conclusion 2.1. Results The Loop Uncertainty and Total Loop Uncertainty for the Loss of Voltage and 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 Model NGV Loss of Voltage Relay - Voltage Trip System(s) Loop Loop Channel Total Loop M&TE Loop Maximum Identification Uncertainty Drift Uncertainty Accuracy Loop (LU) (DL) (TLU) Requirements Setting Tol.

(MTEL) (PALB)

VAC VAC VAC VAC VAC E22-S004-27N1 +/- 3.678 +/- 5.31 302 +/- 5.823 +/- 0.375 +/- 2.61 E22-S004-27N2 *+/- 128.73 *+/- 185.85

Value adjusted to reflect uncertainty applied to the primary of the potential transformer.

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 2.1.

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 8 OF 22 RIVER BEND STATION 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 3.8. RBS USAR None 3.9. Vendor Manuals/Documents 3.9.1. G080-1344, General Electric Instructions Undervoltage Relays 3.9.2. F137-0100, Fluke 45 Dual Display Multimeter Users Manual 3.9.3. Multi-Amp Instructions for the EPOCH-10, Microprocessor-Enhanced Protective Relay Test Set, (maintained by the Standards Laboratory) 3.9.4. 6221.418-000-001A, High Pressure Core Spray System Power Supply Unit, NEDO-10905 3.9.5. 0221.418-000-008, Purchase Specification Data Sheet 21A9300AU, High Pressure Core Spray System 3.10. Electrical Schematics 3.10.1. EE-001M, 4160V One Line Diagram Standby Bus E22-S004 3.10.2. GE-828E537AA#003, Elementary Diagram HPCS Power Supply System 3.10.3. GE-828E537AA#007, Elementary Diagram HPCS Power Supply System 3.10.4. GE-828E537AA#008, Elementary Diagram HPCS Power Supply System

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 9 OF 22 RIVER BEND STATION 3.10.5. GE-828E537AA#011, Elementary Diagram HPCS Power Supply System 3.11. Surveillance Test Procedures:

3.11.1. STP-302-1604, HPCS Loss of Voltage Channel Calibration And Logic System Functional Test 3.11.2. Not used 3.12. Logic Diagrams 3.12.1. GE-152D8167#003, Functional Control Diagram, High Pressure Core Spray Power Supply 3.12.2. GE-152D8167#003A, Functional Control Diagram, High Pressure Core Spray Power Supply 3.12.3. GE-152D8167#004, Functional Control Diagram, High Pressure Core Spray Power Supply 3.12.4. GE-152D8167#005, Functional Control Diagram, High Pressure Core Spray Power Supply 3.13. Standards 3.13.1. ANSI Standard C57.13, Requirements for Instrument Transformers 3.13.2. ANSI Standard C37.90, Relays and Relay Systems Associated with Electric Power Apparatus 3.14. E-mail message from General Electric Power Management to George Boles, Attachment 1 3.15. G13.18.6.3-012, Rev.0, General Electric Model NGV13B Relay Drift Analysis 3.16. BE-230D, 4.16kV Bus 1E22-S004 Relay Settings 3.17. 0221.418-000-049, 1E22-S004 Equipment Summary

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 10 OF 22 RIVER BEND STATION 4.0 Design Input 4.1. Loop Input 4.1.1. Loop Data:

Form 1: Loop/Process Data Sheet Description Data Reference Loop Sensor(s) E22-S004 PT-Line 3.10.4 Location E22-S004 3.10.4 Output Range 0 - 120 VAC 3.10.4 Input Range 0 - 4200 VAC 3.10.4 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 3.9.3)

! Fluke Model 45 Digital Multimeter set to medium resolution (Reference 3.9.2) 4.1.2.2. A minimum of 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months warm up time at the location where the M&TE will be used shall be allowed for the Fluke Model 45 Multimeter.

4.2. Loop Instrumentation Form 2: Instrument Data Sheet Calc. Device Number 1 Description Data Reference Component Number(s) E22-S004-PT-Bus 3.4 Manufacturer GE 3.17 Model(s) JVM 3.17 Location(s) CB. 116EL/E22-S004 3.4 Service Description Transformer 3.4 Instrument Range 0 - 4200 VAC 3.10.4 Instrument Span 120 VAC 3.10.4 Output Range 0 - 120 VAC 3.10.4 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.

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 11 OF 22 RIVER BEND STATION Form 2: Instrument Data Sheet Calc. Device Number 2 Description Data Reference Component Number(s) E22-S004-27N1 3.4 E22-S004-27N2 Manufacturer General Electric 3.16 Model 12NGV 3.16 Location(s) CB. 116EL/E22-S004 3.4 Service Description Relay 3.4 Input Range 0 - 120 VAC 3.9.1 Output Contact Action 3.10, 3.12 Calibration Interval Evaluated 30 Mo. 3.2 (24 Mo. + 25%)

4.3. Loop Device Data Form 3: Instrument Accuracy Data Sheet Calc. Device Number 1 General Electric JVM Description Data Reference Reference Accuracy (RAT) 0.3% of setting 3.9.4, 8.2.1

!" 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

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 12 OF 22 RIVER BEND STATION Form 3: Instrument Accuracy Data Sheet Calc. Device Number 2 General Electric NGV Description Data Reference Reference Accuracy (RAR) +/- 1% of setting 3.14, Attachment 1

!" 7.1.2 Seismic Effects (SER) 0 7.1.4 Temperature Effects (TER) 2% of setting 7.1.12 (68oF - 104oF)

Insulation Resistance Effects (IRR) N/A 7.1.10 Temperature Drift Effect (TDR) N/A 7.1.13 Drift (DRR) +/- 5.823 VAC 3.15 Power Supply Effect (PSR) N/A 7.1.6 Reset Differential 10% of Setting 3.9.1

!" 3.11.1, 7.1.2 4.4. Environmental Information Form 4: Environmental Conditions Data Sheet Zone: CB-116-2 Description Data Reference Location Building/Elevation CB-116 3.4 Room/Area Switchgear Room 3.4 Normal Temperature Range, oF 40 - 104 3.6, 7.1.12 Humidity Range, %RH 20 - 90 3.6, 7.1.9 Radiation 40 Year Total Integrated Dose, 800 3.6 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, Rads Same as Normal 3.6 Pressure Range Same as Normal 3.6 Seismic Accelerations, g <3 3.5

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 13 OF 22 RIVER BEND STATION 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 CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 14 OF 22 RIVER BEND STATION 6.0 Calculation Methodology This calculation is prepared in accordance with the 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 G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 15 OF 22 RIVER BEND STATION 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 the uncertainty of the devices evaluated by this calculation. By assuming all vendor supplied data is a !"#$%&'(#%)*#+,-.#

intermediate rounding of values, sufficient conservatism has been introduced.

7.1.2. /()*01#!"#2%-%

For conservatism, all uncertainties given in vendor data specifications are assumed to be

!"#')&(33#0-.(1+,3(#34(5,6,(*7 7.1.3. Zero Effect Not applicable 7.1.4. Seismic Effects (SE)

Seismic effects are assumed to be negligible for the NGV relay, per Reference 3.9.5.

Seismic effects are not applicable to potential transformers.

7.1.5. Radiation Effects (RE) & Radiation Drift Effect (RD)

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)

Power supply effects are not applicable to type NGV relays as the relay does not utilize a control power source separate from the sensed voltage.

Power supply effects are not applicable to transformers.

7.1.7. Process Measurement Uncertainty (PM)

Not Applicable 7.1.8. Static Pressure Effects (SP)

Not Applicable 7.1.9. Humidity Effects (HE)

The relays were specified by the HPCS manufacturer and are assumed to be designed to with stand the environmental effects in the mounting location. The HPCS Design Specification, Section 4.6.1 (reference 3.9.5) states that the design conditions for the switchgear and its sub-components are 20-90% Relative Humidity. Per Reference 3.6, the humidity range for environmental zone CB-116-2 is 20 to 90% RH. Reference 3.6 also

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 16 OF 22 RIVER BEND STATION identifies that 1% of the calendar year (30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ) the humidity could be 5 % higher. This is considered negligible.Therefore, it is assumed that Humidity Effects are negligible.

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 under-voltage relays evaluated by this calculation are located in the same switch gear compartment.

7.1.12. Temperature Effects (TE)

There is no temperature effect data available from the manufacturer for the Type NGV relay. Therefore for conservatism, temperature effects are assumed to be equal to the repeatability value (+/- 2% of setting) given in Attachment 1. Reference 3.6 also identifies that 1% of the calendar year (30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ) the temperature could be 5oF higher. This is considered negligible.

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 3.15 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 The drift analysis can be found in Reference 3.15.

Drift is not applicable to transformers.

7.2. Assumptions that require confirmation None

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 17 OF 22 RIVER BEND STATION 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) and Determination of Appropriate Device Uncertainty 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 the Loop Drift (DL) 8.8) Calculation of Total Loop Uncertainty (TLU) 8.9) Calculation of Reset Differential (RD) 8.1. Calculation of Miscellaneous Uncertainties 8.1.1. Calculation of Transformer Burden and Determination of Reference Accuracy Per Reference 3.9.4, page 5-10, section 5.3, the Type JVM potential transformer has a 1.2% ratio error for a combined relaying and metering burden of greater than 75 VA.

However, a burden below 75VA yields a transformer accuracy of +/- 0.3% of setting. As shown below, the devices fed by the PT Line transformer do not meet the 75 VA burden threshold.

2 Model NGV Undervoltage Relays @ 4.2 VA each = 8.4 2 Model 27N Undervoltage Relays @ 0.5 VA each = 1.0 1 Synchronizing Relay @ 2.0 VA = 2.0 2 Volt Meter, GE AB40 @ 0.32 VA each = 0.64 1 Synchronizing Scope @ 5.2 VA = 5.2 Control Relays/Meters not listed, Assumed Value = 10.0 25.24 VA Therefore, PT Reference Accuracy shall be 0.3% of setting (87 VAC per Ref. 3.11.1) or 0.261 VAC for this calculation.

8.1.2. Calculation of Relay Temperature Effects (TER) (Assumption 7.1.12)

TER = +/- 1% Setting

= +/- 0.01 x 87 VAC

= +/- 0.87 VAC

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 18 OF 22 RIVER BEND STATION 8.2. Calculation of Individual Device Reference Accuracy (RA) & Determination of Appropriate Device Uncertainty 8.2.1. Transformer Reference Accuracy (RAT)

RAT = +/- 0.3% of Setting

= +/- 0.003

87 VAC

= +/- 0.261 VAC 8!"#/%&'(9 8.2.2. Undervoltage Relay Reference Accuracy for Voltage Setting (RAR)

RAR = +/- 1% of Setting

= +/- 0.01

87 VAC

= +/- 0.87 VAC 8!"#/%&'(9 8.2.3. Loop Reference Accuracy (RAL)

(Reference 3.2)

RAL = +/- [(RAT)2 + (RAR)2]1/2

= +/- [(0.261)2 * (0.87)2]1/2

= +/- 0.908 VAC 8!"#/%&'(9 Per Reference 3.11.1 the Loop Calibration Tolerance (CTL - Procedural As Left Band) for Loss of Voltage is +/- 2.61 VAC. As the CTL value is greater than the associated Loop Reference Accuracy, the individual device Reference Accuracies are set to zero for the remainder of this calculation (Reference 3.2).

8.3. Calculation of Individual Device Uncertainties (Reference 3.2) 8.3.1. Device Uncertainty Transformer (AT) (Sections 4.3 and 8.2.1)

AT = +/- [(RAT)2]1/2

= +/- [(0)2]1/2

= + 0 VAC 8!"#/%&'(9 8.3.2. Device Uncertainty Relay Voltage Setting (AR)

AR = +/- [(RAR)2 + (PSR)2 + (TER)2]1/2

= +/- [(0)2 + (0)2 + (0.87)2]1/2

= +/- 0.87 VAC 8!"#/%&'(9 8.4. Calculation of Loop Calibration Accuracy (CL)

Per reference 3.2 and 3.3 Loop Calibration uncertainty (CL) is defined as:

CL = +/- [(MTEL)2 + (CTL)2]1/2

= +/- [0.3752 + 2.612]1/2 VAC

= +/- 2.64 VAC 8!"#/%&'(9

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 19 OF 22 RIVER BEND STATION 8.4.1. Measuring and Test Equipment Effects - Relay (MTEL)

Measurement & Test Equipment (MTEL) effects are defined from Reference 3.2 as:

MTEL = +/- [(MTERAT)2 + (MTERIT)2 + (MTETET)2 + (MTECST)2]1/2 Where:

MTERAT = Reference accuracy of the M&TE used for calibration. Assumed equal to the Reference Accuracy of the primary element in the loop, 0.261 VAC (Reference 3.2).

MTERIT = Readability of the M&TE used, assumed to be 0 as all M&TE used are digital with at least 2 digits of resolution. (Reference 3.2)

MTETET = Effects of temperature changes on the M&TE between the calibration laboratory and the area where the M&TE is used, Assumed equal to the Reference accuracy of the primary element in the loop, 0.261 VAC (Reference 3.2).

MTECST = The accuracy of the calibration standard used to calibrate the M&TE, assumed equal to 1/4 the Reference accuracy of the primary element in the loop, 0.065 VAC (Reference 3.2).

MTEL = +/- [(MTERAT)2 + (MTERIT)2 + (MTETET)2 + (MTECST)2]1/2

= +/- [(0.261)2 + (0)2 + (0.261)2 + (0.065)2]1/2

= +/- 0.375 VAC (2" Value) 8.4.2. Calculation of Calibration Effects (CT)

Calibration Effects (CTL) are defined from Reference 3.2 as:

CTL = Square Root Sum of the Squares (SRSS) of the calibration effects which are uncertainties due to as Left loop accuracy.

CTL = +/- 2.61 VAC 8!"#$%&'(9 8.5. Calculation of Insulation Resistance Effects (IR) 0 per Assumption 7.1.10 8.6. Calculation of Loop Uncertainty (LU)

LU = +/- (m/n)[(AT)2 + (AR)2 + (CL)2]1/2 +/- M (margin)

= +/- (1.645/2)[(0)2 + (0.87)2 + (2.64)2]1/2 +/- 1.392

= +/- 3.678 VAC Adjusted to reflect primary voltage to the PT

= +/- 3.678 x PT Ratio (Primary Voltage/Secondary Voltage)

= +/- 3.678 x 35 VAC

= +/- 128.73 VAC

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 20 OF 22 RIVER BEND STATION 8.7. Calculation of Loop Drift (DL) 8.7.1. Transformer Temperature Drift Effects (TDT) 0 for per Assumption 7.1.13 8.7.2. Relay Temperature Drift Effects (TDR) 0 per assumption 7.1.13 8.7.3. Relay Drift (DRR):

Assumption 7.1.14 DRR = +/- 5.823 VAC 8!"#/%&'(9 As the only component of loop drift is the relay drift determined in reference 3.15, Loop Drift (DRL) is equal to Relay Drift (DRR).

DL = +/- 5.823 VAC 8!"#/%&'(9 8.8. Calculation of Total Loop Uncertainty (TLU) Calculation:

TLU = +/- (m/n)[(AT)2 + (AR)2 + (CL)2 + (DRL)2]1/2

= +/- (1.645/2)[(0)2 + (0.87)2 + (2.64) + (5.823)2]1/2

= +/- 5.31 VAC Adjusted to reflect primary voltage to the PT:

= +/- 5.31 x PT Ratio (Primary Voltage/Secondary Voltage)

= +/- 5.31 x 35 VAC

= +/- 185.85 VAC 8.9. Calculation of Reset Differential The reset differential is applied to the voltage setting and is specified to be +/- 10% of setting per References 3.9.1 and 3.11.1. This value will be used in the calculation.

RR = +/- 0.1

setting VAC

= +/- 0.1*87

= +/- 8.70 VAC Adjusted to reflected primary (bus) voltage at the PT:

= RR x PT Ratio (primary voltage/secondary voltage)

= +/- 8.7 x 35 VAC

= +/- 304.5 VAC Calculated uncertainties are applicable to reset.

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 21 OF 22 RIVER BEND STATION Summary of Calculation Data Transformer Undervoltage Relay Device 1 Device 2 Values ! Ref Values ! Ref Input Range 0 - 42 kV - 3.13 0 - 120 - 3.13 Process Units VAC - 3.13 VAC - 3.13 Reference Accuracy (RA) 0.3% of Setting 2 8.2.1 1% of Setting 2 8.2.2 Temperature Effect (TE) N/A - 7.1.12 +/- 0.87 2 7.1.12 Seismic Effects (SE) N/A - 7.1.4 N/A - 7.1.4 Radiation Effect (RE) N/A - 7.1.5 N/A - 7.1.5 Instrument Drift (DR) N/A - 7.1.14 +/- 5.823 2 3.15 Temperature Drift Effect (TD) N/A - 7.1.13 N/A - 7.1.13 Radiation Drift Effect (RD) N/A - 7.1.5 N/A - 7.1.5 Power Supply Effect (PS) N/A - 7.1.6 N/A - 7.1.6 Humidity Effects (HE) N/A - 7.1.9 N/A - 7.1.9 Static Pressure Effect (SP) N/A - 7.1.8 N/A - 7.1.8 Process Measurement Effect N/A - 7.1.7 N/A - 7.1.7 (PM)

Insulation Resistance Effect (IR) N/A - 7.1.10 N/A - 7.1.10 Zero Effect (ZE) N/A - 7.1.3 N/A - 7.1.3

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*004 Rev. 1 ENGINEERING DEPARTMENT PAGE 22 OF 22 RIVER BEND STATION 9.0 Simplified Block Diagram

SETPOINT Rev. 1 1

DESIGN VERIFICATION COMMENT SHEET SHEET 1 OF 1 Calculation G13.18.6.2-ENS*004, Rev. 001 (EOI Review Comments)

Comments / Continuation Sheet Question Comments Resolution Initial/Date 1 Calc number should be G13.18.6.2- Corrected ENS*004 2 Calc ref sheet does list the following Agreed, those are not used.

references from the original calc.

Should they be listed in Section VI of the form as being removed?

0221.415-000-122 3221.418-000-003U STP-302-0102 3 Should a reference be added to show I think thats a good idea - the where the Setting value of 87 VAC is setting doesnt appear to be derived in Section 8.1.1? referenced anywhere.

Added reference to STP in Section 8.1.1 4 Use Ref. 3.11.1 for the STP in Section Agreed, although this paragraph 8.9 instead of directly referring to it like will be removed per comment was done in Section 8.2.3. below.

5 Your change in the first paragraph to Agreed - first paragraph serves no Section 8.9 now references the STP purpose. Removed. (changes As-Left reset tolerance. However, the page count) original paragraph pertained to the reset differential value itself, not its tolerance. The current STP revision shows the Reset Differential as 95.70 VAC or 10% of setting. This is stated in the second paragraph of Section 8.9. Based on this I dont believe the first paragraph is required anymore since the rest is now the same whether the relay is calibrated or not calibrated during performance of the STP.

Note: Per discussion, margin was added to the LU to bring it up to previous value. No margin added to TLU. See Section 8.6 and 2.1.

ANO-1 ANO-2 GGNS IP-2 IP-3 PLP JAF PNPS RBS VY W3 NP-GGNS-3 NP-RBS-3 (1) (2)

CALCULATION EC # 27437 Page 1 of 30 COVER PAGE (3) Design Basis Calc. YES NO (4) CALCULATION EC Markup (5 ) (6)

Calculation No: G13.18.6.2-ENS*006 Revision: 1 (7) (8)

Title:

Loop Uncertainty Determination for Div I and II Under Voltage Time Editorial Delay Relays - ABB Model 62K and 62L Time Delay Relays YES NO (9) (10)

System(s): 302 Review Org (Department): NSBE3 (I&C Design)

(11) (12)

Safety Class: Component/Equipment/Structure Type/Number:

Safety / Quality Related ENS-SWG1A-62-1 ENS-SWG1B-62-1 Augmented Quality Program Non-Safety Related ENS-SWG1A-62-2 ENS-SWG1B-62-2 ENS-SWG1A-62-5 ENS-SWG1B-62-5 (13)

Document Type: F43.02 ENS-SWG1A-62-6 ENS-SWG1B-62-6 (14)

Keywords (Description/Topical Codes):

Uncertainty, time delay REVIEWS (15) (16) (17)

Name/Signature/Date Name/Signature/Date Name/Signature/Date Chuck Mohr Justin Waters Paul Matzke (see EC 11753 for signature) (see EC 11753 for signature) (see EC 11753 for signature)

Responsible Engineer Design Verifier Supervisor/Approval Reviewer Comments Attached Comments Attached EN-DC-126 REV 4

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 2 OF 30 RIVER BEND STATION CALCULATION REFERENCE SHEET I. EC Markups Incorporated (N/A to NP calculations):

II. Relationships: Sht Rev Input Output Impact Tracking Doc Doc Y/N No.

1. EN-DC-126 -- 002 N

2. EN-IC-S-007-R -- 000 N

3. 7224.300-000-001B -- 300 N

4. 201.130-186 -- 000 N

5. 215.150 -- 006 N

6. B455-0147 -- 000 N

7. 3242.521-102-001A -- 300 N

8. 0242.521-102-133 -- 300 N

9. B455-0157 -- 300 N

10. EE-001K -- 019 N

11. EE-001L -- 015 N

12. ESK-08ENS01 001 008 N

13. ESK-08EGS09 001 013 N

14. ESK-08EGS10 001 012 N

15. ESK-08EGS13 001 011 N

16. ESK-08EGS14 001 010 N

17. ESK-08EGS15 001 009 N

18. ESK-08EGS16 001 007 N

19. STP-302-1600 -- 018 N

20. STP-302-1601 -- 017 N

21. G13.18.6.3-009 -- 000 N

22. LSK-24-09.05A 001 015 N

23. EDP-AN-02 -- 300 N

24. 0242.521-102-129 -- 300 N

25. G13.18.3.1*001 -- 003 Y EC11753

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 3 OF 30 RIVER BEND STATION CALCULATION REFERENCE SHEET

26. STP-302-1602 -- 020 N

27. STP-302-1603 -- 020 N

28. BE-230A -- 008 N

29. BE-230B -- 010 N

30. G13.18.6.2-ENS*005 -- 000 N

31. G13.18.3.1*002 -- 004 N

32. EE-420G -- 011 N

33. EE-420H -- 008 N

34. STP-302-0102 -- 016 N III. CROSS

REFERENCES:

1. Indus Asset Suite Equipment Data Base (EDB)

2. Technical Specifications section B3.3.8.1

3. Multi-Amp Instruction Book EPOCH-40

4. USAR Figures 3.11-1 through 5.

5. EQTAP IV. SOFTWARE USED:

Title:

N/A Version/Release: Disk/CD No.

V. DISK/CDS INCLUDED:

Title:

N/A Version/Release Disk/CD No.

VI. OTHER CHANGES: The following references are no longer used:

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, 242.521, CSD-24-09.05, 0242.521-102-084, ESK-08EGS01

001, ESK-08EGS04 #001, EDP-AA-20, EDG-EE-003, F137-0100

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 4 OF 30 RIVER BEND STATION Revision Record of Revision Initial issue to support determination of degraded voltage relay setpoints and LAR by ER-RB-0 2001-0360-000.

1 Incorporated new drift value for 62K and 62L relay per EC 11753.

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 5 OF 30 RIVER BEND STATION TABLE OF CONTENTS COVER SHEET CALCULATION REFERENCES RECORD OF REVISION SECTION SHEET 1.0 PURPOSE AND DESCRIPTION ........................................................................................................ 6 2.0 RESULTS/CONCLUSION .................................................................................................................. 8

3.0 REFERENCES

...................................................................................................................................... 9 4.0 DESIGN INPUT.................................................................................................................................. 12 5.0 NOMENCLATURE............................................................................................................................ 16 6.0 CALCULATION METHODOLOGY................................................................................................ 17 7.0 ASSUMPTIONS ................................................................................................................................. 18 8.0 CALCULATION................................................................................................................................. 21 9.0 APPLICABLE MARK NUMBERS................................................................................................... 30 ATTACHMENTS:

A Design Verification Record and Comments ............................................................................ 6 pages

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 6 OF 30 RIVER BEND STATION 1.0 PURPOSE AND DESCRIPTION 1.1 Purpose The purpose of this calculation is to determine the uncertainty associated with the Division I &

II, Safety-Related, 4.16 kV undervoltage time delay relays. 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 is monitored by three degraded voltage 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 a time delay relay, which then outputs a LOP trip signal to the trip logic. Two different time delays are applied depending on whether a LOCA signal is present at the time of the degraded voltage. The LOCA and Non-LOCA time delay is provided by the combination of the 27N relay and the 62K relays.

1.3 Design Bases/Design Bases Event Per 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.

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 7 OF 30 RIVER BEND STATION 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 two sided probability distribution in accordance with 7224.300-100-001B, 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 could be used since the time delay relay performs its safety function in the decreasing direction only. However a two sided probability is used for added conservatism.

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.

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 2.1. 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 CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 8 OF 30 RIVER BEND STATION 2.0 RESULTS/CONCLUSION 2.1 Results The Loop Uncertainty and Total Loop Uncertainty for the Time Delay 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 Model 62K and 62L Relay - Time Delay Function System Loop Model Loop Channel Total Loop M&TE Loop Maximum Identification Uncertainty Drift Uncertainty Accuracy Loop (LU) (DL) (TLU) Requirements Setting Tol.

Seconds Seconds Seconds (MTEL) (CTL)

Seconds Seconds ENS-SWG1A-62-1 302 62K +/-0.209 +/-0.07 +/-0.221 +/- 4.15x10-3 +/- 0.2 ENS-SWG1B-62-1 ENS-SWG1A-62-2 302 62K +/-3.22 +/-1.20 +/-3.795 +/- 4.15x10-3 +/- 3.0 ENS-SWG1B-62-2 ENS-SWG1A-62-5 302 62K +/-0.306 +/-0.07 +/-0.314 +/- 4.15x10-3 +/- 0.3 ENS-SWG1B-62-5 ENS-SWG1A-62-6 302 62L +/-0.313 +/-0.07 +/-0.321 +/- 4.15x10-3 +/- 0.3 ENS-SWG1B-62-6 2.2 Conclusions The calculated Loop Uncertainty and Total Loop Uncertainty presented in table 2.1-1. These values are bounding for the relays and circuits listed in Section 2.1.

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 9 OF 30 RIVER BEND STATION

3.0 REFERENCES

3.1 EN-DC-126, Engineering Calculation Process 3.2 EN-IC-S-007-R, Instrument Loop Uncertainty & Setpoint Calculation 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 B455-0147, ITE Solid-State Timing Relay Relays (62K) 3.9.2 B455-0157. ITE Solid-State Time Delay Relay ITE-62L 3.9.3 3242.521-102-001A, Instruction Manual-Stdby 4.16 kV Switchgear 3.9.4 Not Used 3.9.5 Multi-Amp Instruction Book for the EPOCH-40, Microprocessor-Enhanced Protective Relay Test Set, (maintained by the Standards Laboratory)

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 10 OF 30 RIVER BEND STATION 3.10 Electrical Schematics 3.10.1 EE-001K, 4160V One Line Diagram Standby Bus 1ENS*SWG1A 3.10.2 EE-001L, 4160V One Line Diagram Standby Bus 1ENS*SWG1B 3.10.3 ESK-08ENS01, AC Elementary Diagram Standby Bus 1A & 1B Protection & Metering 3.10.4 ESK-08EGS09, DC Elementary Diagram Standby Bus 1ENS

SWG1A Under Voltage Protection 3.10.5 ESK-08EGS10, DC Elementary Diagram Standby Bus 1ENS

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 1ENS

SWG1B Under Voltage Protection 3.10.8 ESK-08EGS15,DC Elementary Diagram Standby Bus 1ENS

SWG1A Under Voltage Protection & Load Sequence 3.10.9 ESK-08EGS16, 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 STP-302-1602, ENS-SWG1A Degraded Voltage Channel Calibration And Logic System Functional Test 3.11.4 STP-302-1603, ENS-SWG1B Degraded Voltage Channel Calibration And Logic System Functional Test 3.11.5 STP-302-0102, Power Distribution System Operability Check 3.12 LSK-24-09.05A, Standby Diesel Generator Load Sequence, Logic Diagram

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 11 OF 30 RIVER BEND STATION 3.13 Standards None 3.14 Calculations:

3.14.1 G13.18.6.2-ENS*005, Loop Uncertainty Determination for DIV I and DIV II Degraded Voltage Relays - ABB Model 27N Undervoltage Relay 3.14.2 G13.18.3.1*002, Sustained and Degraded Voltage Relay Setpoints for E22-S004 3.14.3 G13.18.6.3-009, ABB Model ITE-62 Relay Drift Analysis 3.15 Equipment Qualification Trending and Thermal Aging Program (EQTAP) 3.16 Relay Setting Drawings 3.16.1 BE-230A, 4kV Bus 1ENS*SWB1A Relay Settings 3.16.2 BE-230B, 4kV Bus 1ENS*SWB1B Relay Settings 3.17 0242.521-102-133, Rev. 300, BOM ENS-SWG1A & 1B 3.18 0242.521-102-129, Rev. 300, BOM ENS-SWG1A & 1B 3.19 EE-420G, Seismic Conduit Installation Plan EL 98 3.20 EE-420H, Seismic Conduit Installation Plan EL 98

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 12 OF 30 RIVER BEND STATION 4.0 DESIGN INPUT The following are the design inputs used to determine the uncertainty for the Division I and Division II degraded voltage timing relays.

4.1 Loop Input 4.1.1 Loop Data:

Form 1: Loop/Process Data Sheet Description Data Reference Loop Sensor(s) Relay contacts 3.10.4-9 ENS-SWG1A Location 3.4 ENS-SWG1B Output Contact Closure 3.10.4-9 4.1.2 Special Considerations:

4.1.2.1 Calibration shall be performed using the following instruments:

Multi-Amp EPOCH-40 DC/Timer Test set (Reference 3.9.5)

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 13 OF 30 RIVER BEND STATION 4.2 Loop Instrumentation Form 2: Instrument Data Sheet Calc. Device Number 1& 2 Description Data Device 1 Reference Data Device 2 Reference Component Number(s) ENS-SWG1A ENS-SWG1A 62-1, 62-2, 62-5 3.4 62-6 3.4 ENS-SWG1B 3.10 ENS-SWG1B 3.10 62-1, 62-2, 62-5 62-6 Type(s) Relay 3.4 Relay 3.4 Manufacturer Asea Brown Boveri 3.17, 3.18 Asea Brown Boveri 3.18 Model 62K 3.17, 3.18 62L 3.18 Location(s) CB. 98 3.19, 3.20 CB. 98 3.19, 3.20 Service Description Relay 3.4 Relay 3.4 Quality Class Safety Related 3.4 Safety Related 3.4 Environmental N 3.4 N 3.4 Qualification Input Range 0.2-4 sec 3.10 1-30 sec. 3.10 0-100 sec Output Contact Action 3.10 Contact Action 3.10 Calibration Interval 30.0 Mo. 30.0 Mo.

3.2 3.2 Evaluated (24 Mo. + 25%) (24 Mo. + 25%)

4.3 Loop Device Data Form 3: Instrument Accuracy Data Sheet Calc. Device Number 1 ITE 62K Data References Description Time Delay Reference Accuracy (RAR) +/-1% of Setting 3.9.1 Seismic Effects (SER) 0 7.1.4

+/-6% of setting or +/-30 ms, which ever is greater 3.9.1 Temperature Effects (TER) (-15oC - 55oC) 3.14 7.1.12 Insulation Resistance Effects (IRR) N/A 7.1.10 Temperature Drift Effect (TDR) N/A 7.1.13 Drift (DRR) +/-2.072% Setpoint 3.14.3

+/-1% of setting or +/-5 ms, which ever is greater 3.9.1 Power Supply Effect (PSR) 7.1.2

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 14 OF 30 RIVER BEND STATION Form 3: Instrument Accuracy Data Sheet Calc. Device Number 2 ITE 62L Data References Description Time Delay

+/-2% of Setting or +/-5 ms, Reference Accuracy (RAR) 3.9.2 whichever is greater Seismic Effects (SER) 0 7.1.4 3.9.2

+/-4% of setting Temperature Effects (TER) 3.14

(-20oC - 55oC) 7.1.12 Insulation Resistance Effects (IRR) N/A 7.1.10 Temperature Drift Effect (TDR) N/A 7.1.13 Drift (DRR) +/-2.072% Setpoint 3.14.3

+/-2% of Setting or +/-5 ms, 3.9.2 Power Supply Effect (PSR) whichever is greater

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 15 OF 30 RIVER BEND STATION 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, ºF 40 - 109 3.6 (68-96 act.) 3.15 Humidity Range, %RH 20-90 3.6 Radiation 40 Year Total Integrated Dose, 800 3.6 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, Rads Same as Normal 3.6 Pressure Range Same as Normal 3.6 Seismic Accelerations, g <3 3.5

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 16 OF 30 RIVER BEND STATION 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 CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 17 OF 30 RIVER BEND STATION 6.0 CALCULATION METHODOLOGY This calculation is prepared in accordance with the 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. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 18 OF 30 RIVER BEND STATION 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 the uncertainty of the devices ev with intermediate rounding of values in the conservative direction, sufficient conservatism has been introduced.

7.1.2 For conservatism, all uncertainties given in vendor data specifications are assumed to be 7.1.3 Zero Effect (ZE)

Not applicable 7.1.4 Seismic Effects (SE)

Reference 3.9.2 states that the undervoltage relays have been tested to 6 g ZPA without damage, malfunction or failure. 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.

7.1.5 Radiation Effects (RE) & Radiation Drift Effect (RD)

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, the model 62K relay has a power supply effect of +/- 1% over the allowable DC control power range of 100 to 137.5 VDC (-20,+10% variation). Per Reference 3.9.2, the model 62L1 relay has a power supply effect of +/- 2% over the allowable DC control power range of 100 to 137.5 VDC (-20,+10% variation). Per Reference 3.11.5, the allowable voltage range is 130 to 140 VDC (104 to 112%). Since the relay will only see an 8% voltage variation, +/-1% and +/-2% deviations will be used to calculate the PS effects for the respective time delay relays in this calculation.

7.1.7 Process Measurement Uncertainty (PM)

Not applicable

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 19 OF 30 RIVER BEND STATION 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 effect.

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.

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. The timers evaluated are not low-current DC devices affected by current leakage due to insulation resistance degradation.

7.1.11 Voltage Drop Voltage drop due to long wiring lengths between source and load are not applicable because the timing relays evaluated are located in the same switchgear as their power source.

7.1.12 Temperature Effects (TE)

Per ABB Descriptive Bulletin IB 18.7.7-1G, Ref. 3.9.1, the temperature effect for an ITE 62K relay is 6% of setting over a span of 5o - 131ºF (-15oC - +55oC) or 0.0476% per ºF.

This value will be used to determine relay temperature effects.

Per ABB Descriptive Bulletin IB 18.7.7-4B, Ref. 3.9.2, the temperature effect for an ITE 62L relay is 4% of setting over a span of -4o - 131ºF (-20oC - +55oC) or 0.0296% per ºF.

This value will be used to determine relay temperature effects.

7.1.13 Temperature Drift Effects (TD)

The drift analysis performed in Reference 3.14.3 is assumed to encompass all components of drift and drift effects, including drift due to temperature variations. The drift analysis performed in Reference 3.14.3 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.

7.1.14 Instrument Drift None

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 20 OF 30 RIVER BEND STATION 7.2 Assumptions that require confirmation None

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 21 OF 30 RIVER BEND STATION 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) and Determination of Appropriate Device Uncertainty to Use 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 8.1 Calculation of Miscellaneous Uncertainties 8.1.1 Calculation of Power Supply Effects on 62-1 Time delay setting (PSRT)

(Reference 3.9.1, Assumption 7.1.6)

PSRT = +/- 1% of Time Delay setting or +/- 5 ms

= +/- (0.010

3.0) seconds (Reference 3.16.1, 3.16.2)

= +/- 0.03 seconds 8.1.2 Calculation of Power Supply Effects on 62-2 Time delay setting (PSRT)

(Reference 3.9.1, Assumption 7.1.6)

PSRT = +/- 1% of Time Delay setting or +/- 5 ms

= +/- (0.010

57.8) seconds (setting per Reference 3.11.3, 3.11.4)

= +/- 0.578 seconds 8.1.3 Calculation of Power Supply Effects on 62-5 Time delay setting (PSRT)

(Reference 3.9.2, Assumption 7.1.6)

PSRT = +/- 1% of Time Delay setting or +/- 5 ms

= +/- (0.010

3) seconds (Reference 3.16.1, 3.16.2)

= +/- 0.03 seconds

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 22 OF 30 RIVER BEND STATION 8.1.4 Calculation of Power Supply Effects on 62-6 Time delay setting (PSRT)

(Reference 3.9.2, Assumption 7.1.6)

PSRT = +/- 2% of Time Delay setting or +/- 5 ms

= +/- (0.020

3) seconds (Reference 3.16.1, 3.16.2)

= +/- 0.06 seconds 8.1.5 Calculation of Relay 62-1 Temperature Effects (TER)

Per Assumption 7.1.12 and Reference 3.9.1, the relay may experience a temperature effect of +/-6% (or +/-30 ms which ever is greater) over a temperature range of -15oC -

55oC (5oF - 131oF). Assuming linearity, this yields an effect of 0.0476 VAC/ºF. The relays are housed inside the DIV I and II switchgear which are assumed to maintain an internal temperature of 104oF to prevent condensation. Reference 3.6 also states that for 1% of the calendar year (30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ), the temperature could be 5oF higher. This is considered negligible. However, the relay is calibrated in the electrical or relay shop which is assumed to be maintained at 73oF. Therefore:

TER = +/- (104oF - 73oF)/ x 0.0476% /ºF

3.0 seconds

= +/- 1.48%

3.0 sec.

= +/- 0.0444 sec 8.1.6 Calculation of Relay 62-2 Temperature Effects (TER)

TER = +/- (31oF) x 0.0476%/oF

57.8 seconds

= +/- 1.48%

57.8 sec.

= +/- 0.855 sec 8.1.7 Calculation of Relay 62-5 Temperature Effects (TER)

TER = +/- (31oF) x 0.0303%/oF

3.0 seconds

= +/- 1.48%

3.0 sec.

= +/- 0.0444 sec 8.1.8 Calculation of Relay 62-6 Temperature Effects (TER)

Per Assumption 7.1.12 and Reference 3.9.2, the relay may experience a temperature effect of +/-4% over a temperature range of -20oC - 55oC (-4oF - 131oF). Assuming linearity, this yields an effect of 0.0296%/oF. The relays are housed inside the DIV I and II switchgear which are assumed to maintain an internal temperature of 104oF to prevent condensation. Reference 3.6 also states that for 1% of the calendar year (30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ), the temperature could be 5oF higher. This is considered negligible. However, the relay is calibrated in the electrical or relay shop which is assumed to be maintained at 73oF.

Therefore:

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 23 OF 30 RIVER BEND STATION TER = +/- (31oF) x 0.0296% /ºF

3.0 seconds

= +/- 0.919%

3.0 sec.

= +/- 0.02757 sec 8.2 Calculation of Individual Device Reference Accuracy (RA) & Determination of Appropriate Device Uncertainty 8.2.1 Time Delay Relay 62-1 Reference Accuracy for Time Delay Setting (RART)

RART = +/- 1% of Time Delay setting

= +/- 0.01

3.0 seconds

= +/- 0.03 seconds 8.2.2 Time Delay Relay 62-2 Reference Accuracy for Time Delay Setting (RART)

RART = +/- 1% of Time Delay setting

= +/- 0.01

57.8 seconds

= +/- 0.578 seconds 8.2.3 Time Delay Relay 62-5 Reference Accuracy for Time Delay Setting (RART)

RART = +/- 1% of Time Delay setting

= +/- 0.01

3.0 seconds

= +/- 0.030 seconds 8.2.4 Time Delay Relay 62-6 Reference Accuracy for Time Delay Setting (RART)

RART = +/- 2% of Time Delay setting

= +/- 0.02

3.0 seconds

= +/- 0.06 seconds 8.3 Calculation of Individual Device Uncertainties (Reference 3.2) 8.3.1 Device Uncertainty Relay 62-1 Time Delay Setting (ART)

(Sections 8.2.3, 8.1.3, 8.1.5)

ART = +/- [(RART)2 + (PSRT)2 + (TERT)2]1/2

= +/- [(0.03)2 + (0.03)2 + (0.0444)2]1/2 seconds

= +/- 0.0614 seconds alue) 8.3.2 Device Uncertainty Relay 62-2 Time Delay Setting (ART)

(Sections 8.2.3, 8.1.3, 8.1.5)

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 24 OF 30 RIVER BEND STATION ART = +/- [(RART)2 + (PSRT)2 + (TERT)2]1/2

= +/- [(0.578)2 + (0.578)2 + (0.855)2]1/2 seconds

= +/- 1.183 seconds 8.3.3 Device Uncertainty Relay 62-5 Time Delay Setting (ART)

(Sections 8.2.3, 8.1.3, 8.1.5)

ART = +/- [(RART)2 + (PSRT)2 + (TERT)2]1/2

= +/- [(0.03)2 + (0.03)2 + (0.00444)2]1/2 seconds

= +/- 0.0614 seconds 8.3.4 Device Uncertainty Relay 62-6 Time Delay Setting (ART)

(Sections 8.2.3, 8.1.3, 8.1.5)

ART = +/- [(RART)2 + (PSRT)2 + (TERT)2]1/2

= +/- [(0.06)2 + (0.06)2 + (0.02757)2]1/2 seconds

= +/- 0.0892 seconds 8.4 Calculation of Loop Calibration Accuracy (CL)

Per references 3.2 and 3.3, loop calibration effects are defined as:

CL = +/- [(MTEL)2 + (CTL)2]1/2 The CTL is set to the procedural as-left band (PALB).

8.4.1 Calculation of Loop Calibration Effects for the 62-1 Time Setting (CL)

(Sections 3.9.2, 3.9.3, 8.4.1.1, 8.4.1.2, 3.11.1, 3.11.2)

CL = +/- [(MTEL)2 + (CTL)2]1/2 CTL = PALB selected = 0.2

= +/- [(4.15 x 10-3)2 + 0.22]1/2 VAC

= +/- 0.2 seconds 8.4.1.1 Measuring and Test Equipment Effects - Relay Time Setting (MTEL)

Measurement & Test Equipment (MTEL) effects are defined from Reference 3.2 as:

MTELV = +/- [(MTERAT)2 + (MTERIT)2 + (MTETET)2 + (MTECST)2]1/2 Where:

MTERAT = The reference accuracy of the M&TE being utilized. Epoch 40 Aux. Timer and DC voltage/current unit has a timer accuracy of 0.005% or one digit on the min. 99.9999 range. Using 57.8 x 0.00005 =2.89x10-3 seconds.

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 25 OF 30 RIVER BEND STATION MTETET = Temperature effect on the M&TE being utilized. The Epoch 40 operating range is 0o to 50oC with no temperature coefficient given. The total timer accuracy of 0.005% is conservatively assumed or 2.89x10-3 seconds (Reference 3.2).

MTERIT = Assumed to be 0 as all M&TE used are digital with at least 2 digits of resolution. (Reference 3.2)

MTECST = Assumed equal to 1/4 the Reference Accuracy of the time delay function of the relay time delay function = 0.005%/4 seconds (per Reference 3.2).

MTEL = +/- [(MTERART)2 + (MTERIRT)2 + (MTETERT)2 + (MTECSRT)2]1/2

= +/- [(2.89x10-3)2 + (0)2 + (2.89x10-3)2 + (7.23 x10-4)2]1/2

= +/- 4.15 x 10-3 seconds with worse case time delay, This value will be conservatively used for all the relays.

8.4.2 Calculation of Loop Calibration Effects for the 62-2 Time Delay Setting (CLT)

CLT = +/- [(MTELT)2 + (CTLT)2]1/2 CTL = PALB = 3.0

= +/- [(4.15 x 10-3)2 + 3.02]1/2 seconds

= +/- 3.0 seconds 8.4.3 Calculation of Loop Calibration Effects for the 62-5 Time Delay Setting (CLT)

CLT = +/- [(MTELT)2 + (CTLT)2]1/2 CTL = PALB = 0.3

= +/- [(4.15 x 10-3)2 + 0.32]1/2 seconds

= +/- 0.3 seconds 8.4.4 Calculation of Loop Calibration Effects for the 62-6 Time Delay Setting (CLT)

CLLT = +/- [(MTELT)2 + (CTLT)2]1/2 2 CTL = PALB = 0.3

= +/- [(4.15 x 10-3)2 + 0.32]1//2 seconds

= +/- 0.3 seconds 8.5 Calculation of insulation Resistance Effects (IR) 0 per Assumption 7.1.10 8.6 Calculation of Loop Uncertainty (LU) 8.6.1 Loop Uncertainty for Time Delay 62-1 Setting (LUT)

Per references 3.2 and 3.3 Loop Uncertainty is defined as:

LUT = +/- (m/n)[(ART)2 + (CLT)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 two a two sided confidence.

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 26 OF 30 RIVER BEND STATION n = The number of standard deviations used in specifying the individual components of uncertainty

= +/- (2.0/2) [(0.06)2 + (0.2)2]1/2

= +/- 0.209 seconds While a one sided distribution may be used, a two sided is used in this calculation for added conservatism.

8.6.2 Loop Uncertainty for Time Delay 62-2 Setting (LUT)

Per references 3.2 and 3.3 Loop Uncertainty is defined as:

LUT = +/- (m/n)[(ART)2 + (CLT)2]1/2

= +/- (2.0/2)[(1.183)2 + (3.0)2]1/2

= +/- 3.22 seconds Note: The transformer uncertainty is not applicable to the time delay function of the relay.

8.6.3 Loop Uncertainty for Time Delay 62-5 Setting (LUT)

Per references 3.2 and 3.3 Loop Uncertainty is defined as:

LUT = +/- (m/n)[(ART)2 + (CLT)2]1/2

= +/- (2.0/2)[(0.06)2 + (0.3)2]1/2

= +/- 0.306 seconds 8.6.4 Loop Uncertainty for Time Delay 62-6 Setting (LUT)

Per references 3.2 and 3.3 Loop Uncertainty is defined as:

LUT = +/- (m/n)[(ART)2 + (CLT)2]1/2

= +/- (2.0/2)[(0.089)2 + (0.3)2]1/2

= +/- 0.313 seconds 8.7 Calculation of Loop Drift (DL) 8.7.1 Transformer Temperature Drift Effects (TDT) 0 for the time delay function.

8.7.2 Relay Temperature Drift Effects (TDR) 0 for the time delay function.

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 27 OF 30 RIVER BEND STATION 8.7.3 Relay Drift (DRRV) 8.7.3.1 Relay 62-1 Drift for Time Delay Setting (DRRT) (Assumption 7.1.14).

DRRT = +/-2.072% Setpoint

= +/-2.072% (3.0 sec.)

= +/-0.07 seconds As there are no other components of drift to be considered for the relay time delay setting, Loop drift for the time delay setting (DRLT) = DRRT 8.7.3.2 Relay 62-2 Drift for Time Delay Setting (DRRT) (Assumption 7.1.14).

DRRT = +/-2.072% Setpoint

= +/-2.072% (57.8 sec.)

= +/-1.20 seconds As there are no other components of drift to be considered for the relay time delay setting, Loop drift for the time delay setting (DRLT) = DRRT 8.7.3.3 Relay 62-5 Drift for Time Delay Setting (DRRT) (Assumption 7.1.14).

DRRT = +/-2.072% Setpoint

= +/-2.072% (3.0 sec.)

= +/-0.07 seconds As there are no other components of drift to be considered for the relay time delay setting, Loop drift for the time delay setting (DRLT) = DRRT 8.7.3.4 Relay 62-6 Drift for Time Delay Setting (DRRT) (Assumption 7.1.14).

DRRT = +/-2.072% Setpoint

= +/-2.072% (3.0 sec.)

= +/-0.07 seconds As there are no other components of drift to be considered for the relay time delay setting, Loop drift for the time delay setting (DRLT) = DRRT

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 28 OF 30 RIVER BEND STATION 8.8 Calculation of Total Loop Uncertainty (TLU) 8.8.1 Total Loop Uncertainty 1 Time Delay Setting (TLUT)

Per references 3.2 and 3.3 Total Loop Uncertainty is defined as:

TLUT = +/- (m/n) [(ART)2 + (CLT)2 + (DRLT)2]1/2

= +/- (2.0/2) [(0.06)2 + (0.2)2+ (0.07)2]1/2

= +/- 0.221 seconds 8.8.2 Total Loop Uncertainty 2 Time Delay Setting (TLUT)

Per references 3.2 and 3.3 Total Loop Uncertainty is defined as:

TLUT = +/- (m/n) [(ART)2 + (CLT)2 + (DRLT)2]1/2 +M (Margin)

= +/- (2.0/2) [(1.183)2 + (3.0)2+ (1.20)2]1/2 + 0.354

= +/- 3.795 seconds 8.8.3 Total Loop Uncertainty 5 Time Delay Setting (TLUT)

Per references 3.2 and 3.3 Total Loop Uncertainty is defined as:

TLUT = +/- (m/n) [(ART)2 + (CLT)2 + (DRLT)2]1/2

= +/- (2.0/2) [(0.06)2 + (0.3)2+ (0.07)2]1/2

= +/- 0.314 seconds 8.8.4 Total Loop Uncertainty 6 Time Delay Setting (TLUT)

Per references 3.2 and 3.3 Total Loop Uncertainty is defined as:

TLUT = +/- (m/n) [(ART)2 + (CLT)2 + (DRLT)2]1/2

= +/- (2.0/2) [(0.089)2 + (0.3)2+ (0.07)2]1/2

= +/- 0.321 seconds Note: The transformer uncertainty is not applicable to the time delay function of the undervoltage relay.

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 29 OF 30 RIVER BEND STATION Summary of Calculation Data Time Delay Time Delay Terms Device 1 Device 2 Values Ref Values Ref Model ITE 62K N/A ITE 62L N/A 3.10.6 0.2 to 4.0 sec 3.10.7 3.10.8 Input Range 1 to 30 sec -

0 to 100 sec 3.10.8 3.10.9 3.10.9 Process Units Seconds - N/A Seconds N/A Voltage Input Range -20% to +10% - 3.9.1 -20% to +10% - 3.9.2 Input Range N/A - N/A N/A - N/A Process Units Seconds - 3.9.1 Seconds - 3.9.2 Reference Accuracy (RA) +/-1% of Setting. - 3.9.1 +/- 2% of Setting. 2 3.9.2 Greater of +/- 6% of Greater of +/- 4% of Temperature Effect (TE) 2 3.9.1 2 3.9.2 Setting or +/- 30ms. Setting Seismic Effects (SE) N/A 2 7.1.4 N/A - 7.1.4 Radiation Effect (RE) N/A - 7.1.5 N/A - 7.1.5

+/-0.07 8.7.3.1 Timing Relay Drift (DR) - +/-0.07 2

+/-1.20 8.7.3.2 8.7.3.4 Temperature Drift Effect (TD) N/A 2 7.1.13 N/A - 7.1.13 Radiation Drift Effect (RD) N/A - 7.1.5 N/A - 7.1.5

+/ Greater of +/-2%

+/ Greater of +/-1% of Power Supply Effect (PS) - 3.9.1 of Setting or +/- 2 3.9.2 Setting or +/- 5ms.

5ms.

Humidity Effects (HE) N/A 2 7.1.9 N/A - 7.1.9 Static Pressure Effect (SP) N/A - 7.1.8 N/A - 7.1.8 Process Measurement Effect N/A - 7.1.7 N/A - 7.1.7 (PM)

Insulation Resistance Effect (IR) N/A - 7.1.10 N/A - 7.1.10 Zero Effect (ZE) N/A - 7.1.3 N/A - 7.1.3

SETPOINT CALCULATION CALC. NO. G13.18.6.2-ENS*006 ENGINEERING DEPARTMENT REVISION: 1 PAGE 30 OF 30 RIVER BEND STATION 9.0 APPLICABLE MARK NUMBERS Model Relay Mark Numbers Div. I Div. II ITE 62K ENS-SWG1A-62-1 ENS-SWG1B-62-1 Sustained Undervoltage Short Time Delay ITE 62K ENS-SWG1A-62-2 ENS-SWG1B-62-2 Degraded Voltage Long Time Delay ITE 62K ENS-SWG1A-62-5 ENS-SWG1B-62-5 LOCA 3 second Time Retention ITE 62L ENS-SWG1A-62-6 ENS-SWG1B-62-6 Degraded Undervoltage Short Time Delay

DESIGN VERIFICATION COMMENT SHEET SHEET 1 OF 1 Calculation G13.18.6.2-ENS*006, Rev. 001 (EOI Review Comments)

Comments / Continuation Sheet Question Comments Resolution Initial/Date 1 Calc G13.18.6.3-009 is referenced for No change to this calc. The drift device 1 drift in Section 4.3, but relays calculation states that it is ENS-SWG1A-62-5 and ENS-SWG1B- applicable to similar instruments, 62-5 are not listed in that calc. Did and is therefore a valid input for Excel miss them? If so, instruct them this calculation.

to add them to the calc.

2 Rev. 1 listed ESK-08EGS04, Sh. 001, Both added to Section VI and F137-0100, but they are not listed in Section VI of the Calc Ref Sheet in Rev. 1.

3 STP-302-0102 is listed as Ref. 3.11.5, Added to Ref Sheet but is not on the Calc Ref Sheet.

ANO-1 ANO-2 GGNS IP-2 IP-3 PLP JAF PNPS RBS VY W3 NP-GGNS-3 NP-RBS-3 (1) (2)

CALCULATION EC # 27437 Page 1 of 22 COVER PAGE (3) Design Basis Calc. YES NO (4) CALCULATION EC Markup (5 ) (6)

Calculation No: G13.18.6.2-ENS*007 Revision: 1 (7) (8)

Title:

Loop Uncertainty Detemination for DIV III Undervoltage Time Delays - Editorial Agastat ETR14 Time Delay Relay YES NO (9) (10)

System(s): 203/302 Review Org (Department): NSBE3 (I&C Design)

(11) (12)

Safety Class: Component/Equipment/Structure Type/Number:

Safety / Quality Related E22-S004-ACB4-62S3 E22-S004-ACB1-62S4 Augmented Quality Program Non-Safety Related E22-S004-ACB4-62S5 E22-S004-ACB1-62S6 (13)

Document Type: F43.02 (14)

Keywords (Description/Topical Codes):

uncertainty, calculation, relay, time delay REVIEWS (15) (16) (17)

Name/Signature/Date Name/Signature/Date 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 Design Verifier Supervisor/Approval Reviewer Comments Attached Comments Attached EN-DC-126 REV 4

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 2 OF 22 RIVER BEND STATION CALCULATION REFERENCE CALCULATION NO: G.13.18.6.2-ENS*007 SHEET REVISION: 1 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 ! " N

2. EN-IC-S-007-R -- 000 ! " N

3. 7224.300-000-001B -- 300 ! " N

4. 201.130-186 -- 000 ! " N

5. 215.150 -- 006 ! " N

6. A348-0116 -- 000 ! " N

7. 6221.418-000-001A -- 300 ! " N

8. GE-DL828E537AA -- 018 ! " N

9. 0221.418-000-008 -- 300 ! " N

10. EE-001M -- 009 ! " N

11. A348-0111 -- 000 ! " N

12. GE-828E537AA 003 028 ! " N

13. GE-828E537AA 007 030 ! " N

14. GE-828E537AA 008 028 ! " N

15. GE-828E537AA 011 029 ! " N

16. STP-302-1604 -- 018 ! " N

17. BE-230D -- 010 ! " N

18. G13.18.6.3-014 -- 000 ! " N

19. EDP-AN-02 -- 300 ! " N

20. G13.18.3.1*002 -- 004 " ! Y EC11753

21. STP-302-1605 -- 021 ! " N

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 3 OF 22 RIVER BEND STATION III. CROSS

REFERENCES:

1. Indus Asset Suite Equipment Data Base (EDB)

2. Technical Specifications section B3.3.8.1

3. USAR Figures 3.11-1 through 5

4. EQTAP 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: Related references not longer used:

1. STP-302-0102

2. 0221.415-000-122

3. 3221.418-000-003U

4. B455-0139

5. VTD-F137-0100

6. GE-152D8167, # 003, #003A, #004, #005

7. Multi-Amp Instruction Book EPOCH-10

8. 242.521

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 4 OF 22 RIVER BEND STATION Revision Record of Revision Initial issue to support determination of degraded voltage relay setpoints by Electrical Engineering 0

Incorporated new drift value and extended calibration period to 30 months per EC 1

11753.

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 5 OF 22 RIVER BEND STATION 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 Input .................................................................................................................................11 5.0 Nomenclature ...............................................................................................................................13 6.0 Calculation Methodology.............................................................................................................14 7.0 Assumptions.................................................................................................................................15 8.0 Calculation ...................................................................................................................................17 Attachments:

1 Design Verification Form and Comments7 pages

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 6 OF 22 RIVER BEND STATION 1.0 Purpose and Description 1.1. Purpose The purpose of this calculation is to determine the uncertainty associated with the existing Division III, Safety-Related, 4.16 kV undervoltage time delay relays. Nominal trip Set point and Allowable values will be determined by the Electrical Engineering group in calculation G13.18.3.1*002 and documented on the applicable BE drawing.

1.2. Loop Descriptions The Division III 4.16 kV emergency bus has its own independent sustained Degraded Voltage instrumentation and associated trip logic. The Division III bus is monitored by two undervoltage relays whose outputs are arranged in a two-out-of-two logic configuration (Reference 3.10.3). The channels include electronic equipment (e.g., trip units) that compare measured input signals with pre-established setpoints. When the setpoint is exceeded, the channel output relay actuates, which starts the time delay relays to open the DIV III Normal Supply source breaker and illuminates a Main Control Room annunciator alarm. Two different time delays are applied depending on whether a LOCA signal is present at the time of the degraded voltage. The LOCA time delay is provided by the 27N relay. The Non-LOCA time delay is provided by the combination of the 27N relay and the ETR14 relays.

1.3. Design Bases/Design Bases Event Per 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. The Time Delay Allowable Values are long enough to provide time for the offsite power supply to recover to normal voltages, but short enough to ensure that power is available to the required equipment.

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 7224.300-100-001B, 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 time delay 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 G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 7 OF 22 RIVER BEND STATION 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 devices stated in Section 2.1. 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 CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 8 OF 22 RIVER BEND STATION 2.0 Results/Conclusions 2.1. Results The Loop Uncertainty and Total Loop Uncertainty for the Agastat time delay 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 Model ETR14 Time Delay Relay M&TE Loop Maximum Loop Channel Total Loop Accuracy Loop Loop Uncertainty Drift Uncertainty Systems Requirements Setting Identification (LU) (DL) (TLU)

(MTEL) Tol. (CTL)

Seconds Seconds Seconds Seconds Seconds E22-S004-ACB4-62S3 203/302 +/-0.316 +/- 0.112 +/-0.322 +/-1.55 x10-4 +/-0.18 E22-S004-ACB1-62S4 E22-S004-ACB4-62S5 203/302 +5.622 +/- 2.05 +/-5.99 +/-2.83 x10-3 +/-3.0 E22-S004-ACB1-62S6 2.2. Conclusions The calculated Loop Uncertainty and Total Loop Uncertainty presented in table 2.1-1. These values apply to the relays and circuits listed in Section 2.1.

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 9 OF 22 RIVER BEND STATION 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 3.8. RBS USAR None 3.9. Vendor Manuals/Documents 3.9.1. A348-0116, Amerace - Agastat Nuclear Qualified Control Relays 3.9.2. Not used 3.9.3. Not used 3.9.4. 6221.418-000-001A, High Pressure Core Spray System Power Supply Unit, NEDO10905 3.9.5. 0221.418-000-008, Purchase Specification Data Sheet 21A9300AU, High Pressure Core Spray System 3.9.6. A348-0111, Amerace Electronic Components Catalog, Agastat Electromechanical Relays.

3.10. Electrical Schematics 3.10.1. EE-001M, 4160V One Line Diagram Standby Bus E22-S004

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 10 OF 22 RIVER BEND STATION 3.10.2. GE-828E537AA#003, Elementary Diagram HPCS Power Supply System 3.10.3. GE-828E537AA#007, Elementary Diagram HPCS Power Supply System 3.10.4. GE-828E537AA#008, Elementary Diagram HPCS Power Supply System 3.10.5. GE-828E537AA#011, Elementary Diagram HPCS Power Supply System 3.11. Surveillance Test Procedures:

3.11.1. STP-302-1605, HPCS Degraded Voltage Channel Calibration and Logic System Functional Test 3.11.2. STP-302-1604, HPCS Loss of Voltage Channel Calibration and Logic System Functional Test 3.11.3. Not used 3.12. Logic Diagrams None 3.13. Standards None 3.14. Equipment Qualification Trending and Thermal Aging Program (EQTAP) 3.15. 4.16 Kv Bus E22-S004 Relay Settings, Drawings BE-230D 3.16. Calculations 3.16.1. Not used 3.16.2. G13.18.3.1*002, Sustained and Degraded Voltage Relay Setpoint for E22-S004 3.16.3. G13.18.6.3-014, Drift Study for Agastat ETR Series Time Delay Relays 3.17 GE-DL828E537AA , Elementary Diagram-Device List

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 11 OF 22 RIVER BEND STATION 4.0 Design Input The following are the design inputs used to determine the uncertainty for the Division III Agastat time delay relays.

4.1. Loop Input 4.1.1. Loop Data:

Form 1: Loop/Process Data Sheet Description Data Reference Loop Sensor(s) Auxiliary Relays 3.10.4 Location E22-S004 3.10.4 Output Contact closure 3.10.4 4.1.2. Special Considerations:

4.1.2.1 Calibration shall be performed using the following instruments:

! Multi-Amp EPOCH-40 DC/Timer Test set.

4.2. Loop Instrumentation Form 2: Instrument Data Sheet Calc. Device Number 1 Description Data Reference Component Number(s) E22-S004-ACB4-62S3 3.4 E22-S004-ACB1-62S4 3.10 E22-S004-ACB4-62S5 E22-S004-ACB1-62S6 Manufacturer Amerace/Agastat 3.17 Model ETR14 3.17 Location(s) CB.116/E33-S004 3.4 Service Description Relay 3.4 Quality Class Safety Related 3.4 Environmental Qualification N 3.4 Input Range 0-125 VDC 3.10 Output Contact Action 3.10 Calibration Interval Evaluated 30 Mo (24 Mo. + 25%). 3.2

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 12 OF 22 RIVER BEND STATION 4.3. Loop Device Data Form 3: Instrument Accuracy Data Sheet Calc. Device Number 1 Agastat ETR14 Data References Description Time Delay Reference Accuracy (RAR) 10% of Setting !"#$ 3.9.1 5% of Setting (TR) !"#$ 3.9.6 Seismic Effects (SER) 0 7.1.4 Temperature Effects (TER) 3.9.6 5% of setting 3.14 (40oF - 122oF) "#

7.1.12 Insulation Resistance Effects (IRR) N/A 7.1.10 Temperature Drift Effect (TDR) N/A 7.1.13 Drift (DRR) 3.725% Setpoint 3.16.3 Power Supply Effect (PSR) 5% of setting (includes TER) 3.9.6

"# 3.14 4.4. Environmental Information Form 4: Environmental Conditions Data Sheet Zone: CB-116-2 Description Data Reference Location Building/Elevation CB-116 3.4 Room/Area Switchgear Room 3.4 Normal Temperature Range, oF 40 - 109 3.6 (68oF to 83oF act.) 3.14 Humidity Range, %RH 20-95 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, Rads Same as Normal 3.6 Pressure Range Same as Normal 3.6 Seismic Accelerations, g <3 3.5

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 13 OF 22 RIVER BEND STATION 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 CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 14 OF 22 RIVER BEND STATION 6.0 Calculation Methodology This calculation is prepared in accordance with the 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 G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 15 OF 22 RIVER BEND STATION 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 the uncertainty of the devices evaluated by this calculation. By assuming all vendor supp%&'()(*+*)&,)*)"#)-*%.')*/()0&+1) intermediate rounding of values in the conservative direction, sufficient conservatism has been introduced.

7.1.2. 2'/(34)"#)5*+*

For conservatism, all uncertainties given in vendor data specifications are assumed to be

"#)./%',,)otherwise specified.

7.1.3. Zero Effect (ZE)

Not applicable 7.1.4. Seismic Effects (SE)

Reference 3.9.1 states that the timing delays have been tested to 6 g ZPA without damage, malfunction or failure. Reference 3.5 defines the expected level of seismic activity for the 116 ft elevation of the control building as less than 3g. Therefore, seismic effects are assumed to be 0.

7.1.5. Radiation Effects (RE) & Radiation Drift Effect (RD)

Are not applicable to the relays evaluated by this calculation as they are located in a mild environment (Reference 3.6).

7.1.6. Power Supply Effects (PS)

Per reference 3.9.6, Power Supply Effects for the model TR time delay function is assumed to be well under 5% of setting under all control voltage conditions. Therefore, for conservatism the power supply effects on the time delay function will be assumed to equal +/-5% of setting.

7.1.7. Process Measurement Uncertainty (PM)

Not Applicable 7.1.8. Static Pressure Effects (SP)

Not Applicable

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 16 OF 22 RIVER BEND STATION 7.1.9. Humidity Effects (HE)

The relays were specified by the HPCS manufacturer and are assumed to be designed to withstand the environmental effects in the mounting location. The HPCS Design Specification, Section 4.6.1 (reference 3.9.5) states that the design conditions for the switchgear and its sub-components are 20 to 90% relative Humidity. Per Reference 3.6, the humidity range for environmental zone CB-116-2 is 20 to 90% RH. Reference 3.6 also identifies that 1% of the days/calendar year (30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ) the humidity could be 5 %

higher. This is considered negligible. Therefore, it is assumed that Humidity effects are negligible.

7.1.10. Insulation Resistance Effects (IR)

(IR) effects, which may result from degradation of circuit insulation, are not applicable to the devices and circuits addressed by this calculation. The timers evaluated are not low-current DC devices affected by current leakage due to insulation resistance degradation.

7.1.11. Voltage Drop Voltage drop due to long wiring lengths between source and load are assumed to be negligible as the timing relays evaluated by this calculation are located in the same switchgear compartment. The voltage effects are included in the temperature effects per Ref. 3.9.1 and 3.9.6.

7.1.12. Temperature Effects (TE)

Per Reference 3.9.1, the temperature effect for the ETR relay is 10% of setting over a span of 40o - 156oF. Per Reference 3.9.6, the temperature effect for the TR relay is 5% of setting over a span of 32o - 122oF (the non-safety version of the same relay). Since the historical temperature in the area only varies 14oF the 5% value is assumed. The non-safety relay is built to the same specifications but substitute material may be used. This value will be used to determine relay temperature effect. The 5% tolerance is combined with voltage effects in Ref. 3.9.6 but will be conservatively used as an independent effect.

7.1.13. Temperature Drift Effects (TD)

The drift analysis performed in Reference 3.16.3 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 Deleted 7.2. Assumptions that require confirmation None

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 17 OF 22 RIVER BEND STATION 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) and Determination of Appropriate Device Uncertainty to Use 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 8.1. Calculation of Miscellaneous Uncertainties 8.1.1. Calculation of Power Supply Effects on 62S3 and 62S4 Time delay setting (PSRT)

(Reference 3.9.1, Assumption 7.1.6)

PSRT1 = +/- 5% of Time Delay setting, Setting is 3.0 seconds from Ref. 3.15

= +/- (0.050*3.0) seconds

= +/- 0.15 seconds !"#)-*%.'$

8.1.2. Calculation of Power Supply Effects on 62S5 and 62S6 Time delay setting (PSRT)

(Reference 3.9.1, Assumption 7.1.6) Setting is 54.9 seconds per Ref. 3.16.2 PSRT2 = +/- 5% of Time delay setting Setting

= +/- (0.050

54.9) seconds

= +/- 2.745 seconds !"#)-*%.'$

8.1.3. Calculation of Temperature Effects on 62S3 and 62S4 Relay Time Delay Settings (TERT)

(Reference 3.9.1, Assumption 7.1.12)

TERT1 = +/- 5% of Time Delay setting under Adverse Conditions

= +/- (0.05 x 3) seconds

= +/- 0.15 seconds !"#)-*%.'$

8.1.4. Calculation of Temperature Effects on 62S5 and 62S6 Relay Time Delay Settings (TERT)

(Reference 3.9.1, Assumption 7.1.12)

TERT2 = +/- 5% of Time Delay setting under Adverse Conditions

= +/- (0.05 x 54.9) seconds

= 2.745 seconds !"#)-*%.'$

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 18 OF 22 RIVER BEND STATION 8.2. Calculation of Individual Device Reference Accuracy (RA) & Determination of Appropriate Device Uncertainty 8.2.1. Undervoltage Relay Reference Accuracy for Time Delay Setting (RART)

RART1 = +/- 5% of Setting Setting is 3.0 seconds per Ref. 3.15

= +/- 0.05

3.0 seconds

= +/- 0.15 seconds !"#)-*%.'$

8.2.2. Undervoltage Relay Reference Accuracy for Time Delay Setting (RART)

RART2 = +/- 0.5% of Setting

= +/- 0.05

54.9 seconds

= 2.745 seconds !"#)2*%.'$

8.3. Calculation of Individual Device Uncertainties (Reference 3.2) 8.3.1. Device Uncertainty Relay Time Delay Setting (ART)

(Sections 8.2.3, 8.1.3, 8.1.5)

ART1 = +/- [(RART)2 + (PSRT)2 + (TERT)2]1/2

= +/- [(0.15)2 + (0.15)2 + (0.15)2]1/2 seconds

= +/- 0.2598 seconds !"#)-*%.'$

This is conservative because the impacts of RART, PSRT and TERT are all combined in the manufacturers specified RART.

8.3.2. Device Uncertainty Relay Time Delay Setting (ART)

(Sections 8.2.3, 8.1.3, 8.1.5)

ART2 = +/- [(RART)2 + (PSRT)2 + (TERT)2]1/2

= +/- [(2.745)2 + (2.745)2 + (2.745)2]1/2 seconds

= +/- 4.754 seconds 8.4. Calculation of Loop Calibration Accuracy (CL)

Per references 3.2 and 3.3, loop calibration effects are defined as:

CLT = +/- [(MTEL)2 + (CTLT)2]1/2 The CTL is set to the procedural as-left band (PALB) since the PALB is greater than the ART per Ref. 3.2. New PALBs of 0.18 and 3.0 (Ref. 3.11) are selected by iteration of this calculation results into Ref. 3.16.2 and used for CTLT.

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 19 OF 22 RIVER BEND STATION 8.4.1. Calculation of Loop Calibration Effects for the Time Delay Setting (CLT)

CLT1 = +/- [(MTELT1)2 + (CTLT)2]1/2

= +/- [(1.55 x 10-4)2 + (0.18)2]1/2 seconds

= +/- 0.18 seconds CLT2 = +/- [(MTELT2)2 + (CTLT)2]1/2

= +/- [(2.83 x 10-3)2 + (3.0)2]1/2 seconds

= +/- 3.00 seconds 8.4.2.1 Measurement & Test Equipment (MTEL) effects are defined from Reference 3.2 as:

MTELV = +/- [(MTERAT)2 + (MTERIT)2 + (MTETET)2 + (MTECST)2]1/2 Where:

MTERAT = The reference accuracy of the M&TE being utilized. Epoch 40 Aux.

Timer and DC voltage/current unit has a timer accuracy of 0.005% or one digit on the min. 99.9999 range. Using 3.0 x 0.00005 = 1.5 x 10-4 seconds or using 54.9 x 0.00005 = 2.745 x 10-3 seconds.

MTETET = Temperature effect on the M&TE being utilized. Zero is assumed since the Epoch 40 operating range is 0o to 50oC with no temperature coefficient given. (Reference 3.9.4).

MTERIT = Assumed to be 0 as all M&TE used are digital with at least 2 digits of resolution. (Reference 3.2)

MTECST = Assumed equal to 1/4 the Reference Accuracy of the time delay function of the relay time delay function = 0.005%/4 seconds (per Reference 3.2).

MTEL1 = +/- [(MTERART1)2 + (MTERIRT1)2 + (MTETERT1)2 + (MTECSRT1)2]1/2

= +/- [(1.5 X 10-4)2 + (0)2 + (0)2 + (3.75 X 10-5)2]1/2

= +/- 1.55 X 10-4 seconds. !"#)2*%.'$

MTEL2 = +/- [(MTERART2)2 + (MTERIRT2)2 + (MTETERT2)2 + (MTECSRT2)2]1/2

= +/- [(2.745x10-3)2 + (0)2 + (0)2 + (6.86 x 10-4)2]1/2

= +/- 2.83 x10-3 seconds. !"#)2*%.'$

8.5. Calculation of Insulation Resistance Effects (IR) 0 per Assumption 7.1.10 8.6. Calculation of Loop Uncertainty (LU) 8.6.1. Loop Uncertainty for Time Delay Setting (LUT)

Per references 3.2 and 3.3 Loop Uncertainty is defined as:

LUT1 = +/- (m/n)[(ART1)2 + (CLT1)2]1/2

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 20 OF 22 RIVER BEND STATION 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 two a two sided confidence.

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

= +/- (2.0/2)[(0.2598)2 + (0.18)2]1/2

= +/- 0.316 seconds One or two sided distributions may be used in this calculation. Where appropriate, two sided distributions will be used for extra conservatism.

8.6.2. Loop Uncertainty for Time Delay Setting (LUT)

Per references 3.2 and 3.3 Loop Uncertainty is defined as:

LUT2 = +/- (m/n)[(ART2)2 + (CLT2)2]1/2

= +/- (2.0/2)[(4.7544)2 + (3.0)2]1/2

= 5.622 seconds 8.7. Calculation of Loop Drift (DL) 8.7.1. Transformer Temperature Drift Effects (TDT)

N/A for both the voltage and time delay function per Assumption 7.1.13 8.7.2. Relay Temperature Drift Effects (TDR)

N/A for both the voltage and time delay function per assumption 7.1.13 8.7.3. Relay Drift (DRRV) 8.7.3.1 Relay Drift for Time Delay Setting (DRRT) (Assumption 7.1.14)

DRRT1 = +/- 3.725% Setpoint

= +/- (0.03725 x 3) seconds

= +/- 0.112 seconds !"#)2*%.'$

As there are no other components of drift to be considered for the relay time delay setting, Loop drift for the time delay setting (DRLT) = DRRT 8.7.3.2 Relay Drift for Time Delay Setting (DRRT) (Assumption 7.1.14)

DRRT2 = +/- 3.725% Setpoint

= +/- (0.03725 x 54.9) seconds

= +/- 2.05 seconds !"#)2*%.'$

As there are no other components of drift to be considered for the relay time delay setting, Loop drift for the time delay setting (DRLT) = DRRT

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 21 OF 22 RIVER BEND STATION 8.8. Calculation of Total Loop Uncertainty (TLU) 8.8.1. Total Loop Uncertainty - Time Delay Setting (TLUT)

Per references 3.2 and 3.3 Total Loop Uncertainty is defined as:

TLUT1 = +/- (m/n) [(ART1)2 + (CLT1)2 + (DRLT1)2]1/2 +/- M (margin)

= +/- (1.645/2)(((0.2598)2 + (0.18)2 + (0.112)2]1/2 +/- 0.042

= +/- 0.322 seconds Per ref. 3.9.1 the repeat accuracy under adverse conditions is 10%. Adverse conditions include high/low temperature, high/low humidity, and low voltage which envelope the requirements for TLU.

TLUT = +/- (10.0%) (3.0)

= +/- 0.300 seconds Tech Spec limits are 3.33 to 2.67 sec. = +/- 0.33 sec.

8.8.2. Total Loop Uncertainty - Time Delay Setting (TLUT)

Per references 3.2 and 3.3 Total Loop Uncertainty is defined as:

TLUT2 = +/- (m/n) [(ART2)2 + (CLT2)2 + (DRTL2)2]1/2

= +/- (2.0/2)((4.754)2 + (3.0)2 + (2.05)2]1/2

= +/- 5.99 seconds.

Per ref. 3.9.1 the repeat accuracy under adverse conditions is 10%. Adverse conditions include high/low temperature, high/low humidity, and low voltage which envelope the requirements for TLU.

TLUT2 = +/- (10.0%) (54.9)

= +/- 5.49 seconds therefore selected method is more conservative..

Tech spec limits are 53.4 to 66.6 sec. = +/- 6.6 sec

SETPOINT CALCULATION CALC. NO. - REV. ADDENDUM G13.18.6.2-ENS*007 Rev. 1 ENGINEERING DEPARTMENT PAGE 22 OF 22 RIVER BEND STATION Summary of Calculation Data Time Delay Relay Device 1 Time Delay Normal Conditions Time Delay Adverse Conditions (TR data) (ETR data)

Terms Values ! Ref Values ! Ref Input Range 62S3, 62S4 .55 to 15 .55 to 15

_ 3.9.6 _ 3.9.1 62S5, 62S6 4 to 120 4 to 120 Process Units Seconds - 3.9.6 Seconds - 3.9.1 Voltage Range 85-110%V 3.9.6 80% Min V. 3.9.1 Humidity 40-60% 3.9.6 10-95% 3.9.1 Temperature Range oF 70-104 - 3.9.6 40-145 - 3.9.1

+/- 10% of Reference Accuracy (RA) 5% of Setting 2 3.9.6 2 3.9.1 Setting 7.1.12 Included in 7.1.12 Included in Temperature Effect (TE) 2 2 8.1.3 RA 8.1.4 RA 8.1.4 Seismic Effects (SE) Included in - 7.1.4 Included in - 7.1.4 RA RA Radiation Effect (RE) Included in - 7.1.5 Included in - 7.1.5 RA RA

+/- 0.112 sec. 2 7.1.14 +/- 0.112 sec. 2 7.1.14 Instrument Drift (DR)

+/- 2.05 sec. 2 8.7.3 +/- 2.05 sec. 2 8.7.3 Temperature Drift Effect (TD) N/A - 7.1.13 N/A - 7.1.13 Radiation Drift Effect (RD) N/A - 7.1.5 N/A - 7.1.5 Included in 7.1.6 Included in 7.1.6 Power Supply Effect (PS) 2 2 RA 8.1.1 RA 8.1.2 Humidity Effects (HE) Included in - 7.1.9 Included in - 7.1.9 RA RA Static Pressure Effect (SP) N/A - 7.1.8 N/A - 7.1.8 Process Measurement Effect N/A - 7.1.7 N/A - 7.1.7 (PM)

Insulation Resistance Effect (IR) N/A - 7.1.10 N/A - 7.1.10 Zero Effect (ZE) N/A - 7.1.3 N/A - 7.1.3

DESIGN VERIFICATION COMMENT SHEET SHEET 1 OF 1 Calculation G13.18.6.2.-ENS*007, Rev. 001 (EOI Review Comments)

Comments / Continuation Sheet Question Comments Resolution Initial/Date 1 See generic comments in 2/10/09 memo to Resolved as agreed.

Jim Schott. - Ref Form & Section 3 match

- Revision formatting changed

- DV comment form attached 2 Calc # is should be G13.18.6.2-ENS*007. Corrected calc # on front page.

3 Calc ref sheet does list the following Added 0221.415-000-122, references from the original calc. Should 242.521, 3221.418-000-003U, they be listed in Section VI of the form? B445-0139 to section VI 0221.415-000-122 (removed).

242.521 3221.418-000-003U Also added references VTD-F137-B445-0139 0100, and Multi-Amp Instruction Book EPOCH-10 to section VI Also, GE-DL828E537AA and BE-230D (removed).

are not listed but are referenced in the calc and shown in Section 3.0. Added GE-DL828E537AA and BE-230D to the calc. Reference sheet.

4 Section 2.2: typo; change fort to for. Revised paragraph, typo eliminated.

5 On the Calc Ref Sheet and Ref. 3.4 corrected change Passport EDB to Indus Asset Suite Equipment Data Base (EDB).

Passport was replaced by Indus awhile back.

6 Make sure the final approval of calcs Okay.

G13.18.6.3*014 still supports the new drift value on Page 13 of the calc for a 30 month calibration frequency. Also, why Corrected error in the Excel calc does this Excel calc have an

in it and number format.

others dont?

7 Component numbers in Section 4.2 do not Corrected component number mis-match component numbers in section 2.1 match.

and cover page.

8 Move 8.4.1 on page 19 to top of next page. Moved as suggested.

9 Shouldnt assumption 7.1.14 be deleted Assumption 7.1.14 changed to since theres no assumption being made? read deleted.

10 Is reference 9.3.2 used in the calc? Its on Reference is actually 3.9.2 and it the Calc Ref Sheet. was removed from calc., Ref. form and added to Sec. VI.

11 Calc G13.18.3.1*002 is shown as being These TLUs are an input to that impacted. What is the impact? calc.

12 Where do the revised Channel Drift values Drift comes from section 8.7.3 ,

in table 2.1-1 come from? values were corrected on Table 2.1-1.

13 (new) Use of word bounding in section 2.2 need Per phone discussion revised clarifying. section 2.2 Conclusions as to what components and circuits the calculated values apply to.

DESIGN VERIFICATION COMMENT SHEET SHEET 1 OF 1 Calculation G13.18.6.2-ENS*007, Rev. 002 (EOI Review Comments, Second Round)

Comments / Continuation Sheet Question Comments Resolution Initial/Date 1 Remove space in drift value in Form 4 Removed space.

on Page 12. Should be 3.725%

2 Sections 8.8.1 and 8.8.2 reference Those TS limits are not changed Tech Spec limits. Verify that these by the pending revision to values dont change in G13.18.3.1*002.

G13.18.3.1*002.

v t e Letter Sequence Request
TAC:ME7767, (Approved, Closed)
Initiation Request, Request, Request, Request, Request, Request, Request, Request Acceptance Supplement Administration Questions 12 March 2012 7 August 2012 5 December 2012 Answers 5 September 2012 9 January 2013 Results Approval Other: ML13018A084, ML13018A100, ML13018A103, ML13018A107, ML13018A110, ML13022A138, ML13023A109
MONTHYEAR2012-12-05 [Table View]

ML12261A491

Text

Subject:

Title:

REFERENCES:

Title:

Title:

6.0 CONCLUSION

Title:

REFERENCES:

Title:

Title:

6.0 CONCLUSION

Title:

REFERENCES:

Title:

Title:

Title:

REFERENCES:

Title:

Title:

Title:

REFERENCES:

Title:

Title:

3.0 REFERENCES

3.0 REFERENCES

Title:

REFERENCES:

Title:

Title:

Navigation menu

Search