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Enclosure 3, Calculation NEDC-33859 - Non-Proprietary, Instrumentation Limits Calculation, Monticello Nuclear Generating Plant, Average Power Range Monitor Numac Prnm Setpoints - Extended Flow Window Stability, Revision 0, July 2014
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Issue date:	07/31/2014
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GE Hitachi Nuclear Energy NEDO-33859 Revision 0 July 2014

Non-Proprietary Information-Class I (Public)

Instrument Limits Calculation Monticello Nuclear Generating Plant Average Power Range Monitor NUMAC PRNM Setpoints - Extended Flow Window Stability

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) ii NON-PROPRIETARY INFORMATION NOTICE This is a non-proprietary version of NEDC-33859P, Revision 0 which has the proprietary information removed. Portions of the document that have been removed are indicated by an open and closed bracket as shown here [[ ]]. IMPORTANT NOTICE REGARDING CONTENTS OF THIS REPORT PLEASE READ CAREFULLY The design, engineering, and other information contained in this document are furnished for the purposes of supporting a License Amendment Request by Xcel Energy for pressure temperature limits in proceedings before the U.S. Nuclear Regulatory Commission. The only undertakings of the GEH respecting information in this document are contained in the contract between Xcel Energy and GEH, and nothing contained in this document shall be construed as changing the contract. The use of this information by anyone other than Xcel Energy, or for any purpose other than that for which it is intended, is not authorized; and, with respect to any unauthorized use, GEH makes no representation or warranty, express or implied, and assumes no liability as to the completeness, accuracy, or usefulness of the information contained in this document, or that its use may not infringe privately owned rights.

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) iii Table of Contents Acronym and Abbreviations .......................................................................................................iv Executive Summary .............................................................................................................

....... 1 1. Function: EFWS APRM Scrams and Rod Blocks ............................................................ 2

2. Components ..................................................................................................................... 7 3. Summary Results ............................................................................................................ 17

4. Comments and Recommendations .................................................................................. 18

5. References ...................................................................................................................... 21 NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) iv ACRONYM AND ABBREVIATIONS Acronym Description AGAF APRM Gain Adjustment FactorAL Analytical LimitALT As Left ToleranceAPEA Primary Element Accurac y-Accuracy ErrorAV Allowable ValueDL Design LimitDPEA Primary Element Accurac y-Drift ErrorEFWS Extended Flow Window Stability EMI Electromagnetic InterferenceLAT Leave Alone ToleranceLER Licensee Event ReportLPRM Local Power Range MonitorM&TE Maintenance and Testing Equipment NTSP Nominal Trip SetpointNUMAC Nuclear Measurement Analysis and ControlOL Operational LimitPEA Primary Element AccuracyPMA Process Measurement Accuracy PBSP Power Breakpoint Setpoint PBSP-RB Power Breakpoint Setpoint - Rod Block PBSP-Trip Power Breakpoint Setpoint - Scram RDF Rated Drive FlowRFI Radio Frequency InterferenceRTP Rated Thermal PowerSLO Single-Loop Operatio nSTA Spurious Trip AvoidanceSTP Simulated Thermal PowerTLO Two-Loop OperationTRM Technical Requirements ManualTS Technical Specification WBSP-Break Flow Breakpoint Setpoint WBSP-RB Flow Clamp Rod Bloc k WBSP-Trip Flow Clamp Scra mURL Upper Range LimitVD Vendor Drift

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 1 of 21 EXECUTIVE

SUMMARY

This document is a supplement analysis data sheet to Reference 1. Included in this document in sequential order are:

The setpoint functions for the system,

The setpoint function analyses inputs and the source reference of the inputs,

The devices in the setpoint function instrument loop,

The component analysis inputs and input sources,

The calculated results,

Input comments and result recommendations,

References. System: Average Power Range Monitor The following Extended Flow Window Stability (EFWS) Average Power Range Monitor (APRM) setpoint functions are included in this document:

PBSP - Constant Power Line Setpoint 1 at low Recirculation (Recirc) flow rates below the Breakpoint in units of Percent Rated Thermal Power (% RTP) (horizontal line on Power / Recirc Drive flow map):

PBSP-Trip - Scram

PBSP-RB - Rod Block

WBSP-Break - Flow Breakpoint Setpoint where Constant Power Line Setpoint intersects the Slope Line Setpoint in units of % Rated Drive Flow (% RDF). (Note that the breakpoint for the Scram and Rod Block are the same, in units of % RDF.)

Sloped Line Setpoint with Slope (in units of % RTP / % RDF) and Intercept (in units of % RTP) between the Flow Breakpoint Setpoint and the Constant Flow Line Setpoint (sloped line on Power / Recirc Drive Flow map):

Scram

Rod Block

WBSP - Constant Flow Line Setpoint (Flow Clamp Setpoint) in units of % RDF (vertical line on Power / Recirc Drive flow map):

WBSP-Trip (Flow Clamp Scram)

WBSP-RB (Flow Clamp Rod Block)

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 2 of 21 1. FUNCTION: EFWS APRM SCRAMS AND ROD BLOCKS Setpoint Characteristics: Definition Reference(s) Event Protection: Limiting event for the new EFWS APRM setpoints: Scram: The EFWS APRM Scram setpoint functions provide a Scram for stability transients in accordance with the Enhanced Option III Long Term Stability solution Rod Block:

The EFWS Rod Blocks serve as a warning of potential EFWS Scrams.

Function After Earthquake Required Not Required Comment 6 Setpoint Direction

Constant Power Line Setpoint:

PBSP-Trip Scram

PBSP-RB Rod Block

Sloped Line Setpoint:

Scram

Rod Block

Constant Flow Line (Flow Clamp) Setpoint:

WBSP-Trip (Scram)

WBSP-RB (Rod Block)

W BSP-Break - Flow Breakpoint Setpoint Increasing Decreasing Increasing Decreasing Increasing Decreasing Increasing Decreasing Increasing Decreasing Increasing Decreasing Increasing Decreasing Single or Multiple Channel Single Multiple Ref. 4.2 (Sections 3.2, 4.2.2, 4.3);

Licensee Event Report (LER) Calculation Basis if Multiple Channel Standard (Conservative) LER Calculation or Configuration Specific LER Calculation Ref. 1, Ref. 2 Trip Logic for Configuration Specific LER Calculation 2-Out-Of-4 Comment 26

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 3 of 21 Plant Data: Value Sigma if not 2 Reference(s) Flow Primary Element (Venturi) a.) Accuracy (APEA) b.) Drift (DPEA) a.) +/- 1% rated Recirc flow b.) n/a Flow Process Measurement Accuracy (PMA) a.) PMA (flow noise) b.) PMA (static head) a.) +/- 1.0% rated Recirc Flow b.) Negligible Plant Data: Value Sigma if not 2 Reference(s) Power Primary Element (LPRM Detector)

(% Power) a.) APEAAccuracy b.) APEAPower Supply Effect c.) DPEA a.) +/- 1%; bias 0.49% b.) Negligible c.) +/- 0.2% / 7days; bias 0.33 % / 7days Ref. 2 (Section 4.5.3); Comment 16 Power Process Measurement Accuracy (PMA

) (% Power) a.) Tracking (fixed and flow-biased) b.) Noise (neutron flux) c.) Noise (Simulated Thermal Power (STP))

a.) +/- 1.11% b.) +/- 2.0% c.) +/- 0.0%

Comment 13 Components (or Devices) in Setpoint Function Instrument Loop:

Flow Element

Local Power Range Monitor (LPRM) Detector

Flow Transmitter

Nuclear Measurement Analysis and Control (NUMAC) Chassis:

Instrument Loop Flow Electronics (Recirculation Flow Monitor System)

Instrument Loop Power Electronics (LPRM, APRM, Trip Circuit)

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 4 of 21 1.1 EFWS APRM Constant Power Line Setpoint: PBSP-Trip Scram (Comment 23)

Current Function Limits: Value/Equation Currently (% RTP) EFWS Value/Equation (% RTP) Applicable W d Range (% RDF) Reference(s) Analytical Limit (AL) n/a 42.6 0 W d 29 Technical Specification (TS) Allowable Value (AV) n/a Results in Section 3 Results in Section 3 Nominal Trip Setpoint (NTSP) n/a Results in Section 3 Results in Section 3 Operational Limit (OL) n/a 28.3 Results in Section 3 Section 3, Comment 17 1.2 EFWS APRM Constant Power Line Setpoint: PBSP-RB Rod Block (Comment 23) Current Function Limits: Value/Equation Currently (% RTP) EFWS Value/Equation

(% RTP) Applicable W d Range (% RDF) Reference(s) Design Limit (DL) n/a n/a 0 W d 29 Comment 19; Comment 24 TS AV n/a Scram AV - 10.3 % Results in Section 3 Comment 19 NTSP n/a Results in Section 3 Results in Section 3 OL n/a n/a n/a Comment 3

1.3 EFWS APRM WBSP-Break - Flow Breakpoint Setpoint (Comment 23) Current Function Limits: Value/Equation Currently (% RTP) EFWS Value/Equation (% RDF) Reference(s) AL/DL n/a 29.0 Comment 19; Comment 24 TS AV n/a Results in Section 3 NTSP n/a Results in Section 3 OL n/a n/a Comment 3

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 5 of 21 1.4 EFWS APRM Sloped Line Setpoint: Scram (Comment 23) Current Function Limits: Value/Equation Currently (% RTP) EFWS Value/Equation (% RTP) Applicable W d Range (% RDF) Reference(s) AL n/a 2.49 W d + (-29.61) 29.0 < W d 45.5 TS AV n/a Results in Section 3 Results in Section 3 NTSP n/a Results in Section 3 Results in Section 3 OL n/a 2.49 W d + (-49.6) Results in Section 3 Section 3, Comment 17 1.5 EFWS APRM Sloped Line Setpoint: Rod Block (Comment 23) Current Function Limits: Value/Equation Currently (% RTP) EFWS Value/Equation (% RTP) Applicable W d Range (% RDF) Reference(s) DL n/a n/a n/a Comment 19; Comment 24 TS AV n/a Scram AV - 10.3 % Results in Section 3 Comment 19 NTSP n/a Results in Section 3 Results in Section 3 OL n/a n/a n/a Comment 3

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 6 of 21 1.6 EFWS APRM Constant Flow Line (Flow Clamp) Setpoint: WBSP-Trip (Scram) (Comment 23) Current Function Limits: Value/Equation Currently EWFS Value/Equation (% RDF) Reference(s) AL n/a 45.5 TS AV n/a Results in Section 3 NTSP n/a Results in Section 3 OL n/a 53.9 %RDF Section 3, Comment 17 1.7 EFWS APRM Constant Flow Line (Flow Clamp) Setpoint: WBSP-RB (Rod Block) (Comment 23) Current Function Limits: Value/Equation Currently EWFS Value/Equation (% RDF) Reference(s) DL n/a n/a Comment 19; Comment 25 TS AV n/a Scram AV + 6% Comment 19 NTSP n/a Results in Section 3 OL n/a n/a Comment 3

NEDC-33859P Revision 0 GEH Proprietary Information-Class II (Internal) 7 of 21 2. COMPONENTS 2.1 Flow Transmitter Component Information: Value/Equation Reference(s) Plant Instrument ID No. FT-2-110 A, B, C, D (existing) FT-2-110 E, F, G, H (additional)

Ref. 4.1 (Section 3.1.4) Instrument Vendor Rosemount Model ID No. (including Range Code) 1152DP5N92PB Range 5 Plant Location(s) Reactor Building, el. 935' Process Element Venturi (FE-2-109 A, B)

Inputs: Vendor Specifications Value / Equation Sigma if not 2 Reference(s) Top of Scale 366.31 InWC (20mA)

Bottom of Scale -6.05 InWC (4mA)

Upper Range Limit (URL) 750 InWC Accuracy +/- 0.25% Span 3 Ref. 4.6 (Section 6) Temperature Effect

+/- (0.5% URL + 0.5% Span) per 100ºF 3 Ref. 4.6 (Section 6) Seismic Effect

+/- 0.25% URL during and after 3g over range of 5-100 Hz in 3 major axes Ref. 4.6 (Section 6) Radiation Effect

+/- 8% URL during and after 5 x 10 6 RADs TID Ref. 4.6 (Section 6) Humidity Effect Included in accuracy Ref. 4.6 (Section 6) Power Supply Effect

+/- 0.005% of output span per volt Ref. 4.6 (Section 6) Radio Frequency Interference / Electromagnetic Interference (RFI/EMI) negligible Comment 4 Insulation Resistance Effect negligible Comment 4 Over-pressure Effect

+/- 1% URL after 2000 psig Ref. 4.6 (Section 6) Static Pressure Effect a.) Random zero effect b.) Random span effect (Correction uncertainty) c.) Bias span effect a.) +/- 0.25% URL per 2000 psi b.) +/- 0.25% input reading per 1000 psi c.) n/a (calibrated out) 3 Ref. 4.6 (Section 6) Mounting Position Effect a.) Zero Shift

b.) Span Effect a.) Up to 1 InH 2 0 (calibrated out) b.) None Ref. 4.6 (Section 6);

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 8 of 21 2.1 Flow Transmitter (cont'd)

Plant Data: Value Reference(s) Calib Temperature Range 65 to 90 ºF Normal Temperature Range 60 to 104 ºF Trip Temperature range 60 to 104 ºF Comment 18 Plant seismic value n/aComment 6Plant Radiation value negligible Plant Humidity value 20 to 90%

Power Supply Variation valu e negligibleRFI/EMI value 0 Over-pressure value 1332 psigStatic Pressure value 1010 psig

Drift: Value Sigma if not 2 Reference(s) Current Calib. Interval 24 months Includes extra 25% n/a Ref. 3.1 (Table 3.3.1.1-1, SR 3.3.1.1.11) Desired Calib. Interval 24 months Includes extra 25% n/a Ref. 3.1 (Table 3.3.1.1-1, SR 3.3.1.1.11) Drift Source Vendor Calculated n/a Ref. 4.6 (Section 6) Drift Value

+/- 0.2% URL / 30 months Ref. 4.6 (Section 6); Ref.

1; Ref. 2; Comment 7

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 9 of 21 2.1 Flow Transmitter (cont'd)

Calibration:

Value / equation Sigma if not 3 Reference(s) As Left Tolerance (ALT) +/- 0.3125% Span (+/- 0.05 mA)

Leave Alone Tolerance (LAT) = ALT Input Calibration Tool: Ashcroft Model 2089 n/a Accuracy +/- 0.1% of full scale (FS = 277.3 InWC)

Resolution / Readabilit y 0.0005 Minor Division n/a Upper Range n/a Temperature Effect Included in accuracy Input Calibration Standard: Deadweight tester n/a Accuracy = Input Calibration tool accuracyComment 8 Resolution / Readabilit y Minor Division Upper Range Temperature Effect Output Calibration Tool: Fluke Model 189 n/a Accuracy +/- 0.04 mA Resolution / Readabilit y 0.005 Minor Division n/a Upper Range n/a Temperature Effect Included in accuracy

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 10 of 21 2.1 Flow Transmitter (cont'd)

Calibration:

Value / equation Sigma if not 3 Reference(s) Output Calibration Standard: Fluke Calibrator n/a Accuracy = Ou t put Calibration Tool accuracyComment 8 Resolution / Readabilit y Minor Division Upper Range Temperature Effect Application Specific Input:

Value Sigma if not 2 Reference(s) n/a NEDC-33859P Revision 0 GEH Proprietary Information-Class II (Internal) 11 of 21 2.2 Flow Electronics (Recirculation Flow Monitor System)

Component Information: Value/Equation Reference(s) Plant Instrument ID No. Undefined Comment 2 Instrument vendor GEH Ref. 4.2 Model ID No. (including Range Code) NUMAC Ref. 4.2 Plant Location(s) Admin Bldg, El 951' Process Element n/a Inputs: Vendor Specifications Value / Equation Sigma if not 2 Reference(s) Top of Scale FS = 125% loop flow n/a Ref. 4.2 (Sections 4.3.5.3, 4.3.5.4, 4.6.2); Ref. 4.3 Table 1 Bottom of Scale 0% loop flow n/a Ref. 4.2 (Sections 4.3.5.3, 4.3.5.4, 4.6.2); Ref. 4.3 (Table 1) URL n/a n/a Ref. 4.2 (Sections 4.3.5.3, 4.3.5.4, 4.6.2) Accuracy +/- 0.122 mAdc (where 16 mAdc input span from FT corresponds to 125% flow) Comment 9 Temperature Effect included in accuracy Seismic Effect negligible Ref. 4.5 (Sections 4.1.1, 4.2.6); Comment 4 Radiation Effect negligible Ref. 4.5 Sections 4.2 &

4.2.4); Comment 4, Comment 10 Humidity Effect included in accuracy Comment 4 Power Supply Effect included in accuracy Comment 4 RFI/EMI Effect negligible Ref. 4.5 (Sections 4.1.1, 4.2.5), Comment 4 Insulation Resistance Effect negligible Comment 4 Over-pressure Effect n/a Comment 5 Static Pressure Effect n/a Comment 5

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 12 of 21 2.2 Flow Electronics (cont'd)

Plant Data: ValueReference(s) Calib Temperature Range 72 to 78 ºF Normal Temperature Range 72 to 78 ºF Trip Temperature range 72 to 78 ºF Plant seismic value n/a Plant Radiation value negligible Plant Humidity value 20 to 90%

Power Supply Variation value negligible RFI/EMI value negligible Over-pressure value n/a Comment 5 Static Pressure value n/a Comment 5 Drift: Value Sigma if not 2 Reference(s) Current Calib. Interval 24 months Includes extra 25% n/a Desired Calib. Interval 24 months Includes extra 25% n/a Drift Source Vendor Calculated n/a Ref. 1; Ref. 2 Drift Value

(% rated drive flow) Not specified;

[[° ° ° ° ° ° ° ° ° ° ° ° ° °

]] = +/- 0.122 mAdc / 6 months Ref. 1; Ref. 2

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 13 of 21 2.2 Flow Electronics (cont'd)

Calibration:

Value / equation Sigma if not 3 Reference(s) ALT n/a LAT n/a Input Calibration Tool: Internal to NUMAC n/a Accuracy +/- (1.1)*0.192% units on 125% scale Comment 14 Resolution / Readability included in accuracy Minor Division included in accuracy Upper Range 125% n/a Temperature Effect included in accuracy Input Calibration Standard: included in calibration tool Accuracy n/a Resolution / Readability n/a Minor Division n/a Upper Range n/a Temperature Effect n/a Output Calibration Tool: n/a Accuracy Resolution / Readability Minor Division Upper Range Temperature Effect Output Calibration Standard: n/a Accuracy Resolution / Readability Minor Division Upper Range Temperature Effect Application Specific Input:

Value Sigma if not 2 Reference(s) n/a NEDC-33859P Revision 0 GEH Proprietary Information-Class II (Internal) 14 of 21 2.3 Power Electronics (LPRM, APRM, Trip Circuit)

Component Information: Value/EquationReference(s)Plant Instrument ID No. Undefined Comment 2 Instrument vendor GEH/ Reuter-Stokes Ref. 4.2 Model ID No. (including Range Code) NUMAC Ref. 4.2 Plant Location(s)

Power electronics: Admin Bldg, El 951' Process Element Local Power Range Monitor (LPRM) Neutron detector Ref. 4.2 (Sections 3.2, 4.3.2, 4.4.3)

Inputs: Vendor Specifications Value / Equation Si gma if not 2Reference(s)Top of Scale FS = 125%

n/a Ref. 4.2 (Section 4.3.2) Bottom of Scale 0% n/a Ref. 4.2 (Section 4.3.2) URL n/a n/a Ref. 4.2 (Section 4.3.2) Accuracy

LPRM Detector

LPRM Electronics ALPRM Detector = APRM PEA

+/- 0.943% (% local power) Ref. 1; Ref. 2; Temperature Effect included in accuracy Seismic Effect included in accuracy Ref. 4.5 (Sections 4.1.1 & 4.2.6); Comment 4 Radiation Effect negligible Ref. 4.5 (Sections 4.2 & 4.2.4); Comment 4, Comment 10 Humidity Effect included in accuracy Comment 4 Power Supply Effect (Detector) See APRM PEA RFI/EMI Effect negligible Ref. 4.5 (Sections 4.1.1 & 4.2.5); Comment 4 Insulation Resistance Effect negligible Comment 4 Over-pressure Effect n/a Comment 5 Static Pressure Effect n/a Comment 5

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 15 of 21 2.3 Power Electronics (cont'd)

Plant Data: ValueReference(s) Calib Temperature Range 72 to 78 ºF Normal Temperature Range 72 to 78 ºF Trip Temperature range 72 to 78 ºF Plant seismic value n/a Comment 6 Plant Radiation value negligible Plant Humidity value 20 to 90% Power Supply Variation value negligible RFI/EMI value negligible Over-pressure value n/a Comment 5 Static Pressure value n/a Comment 5 Drift: Value Sigma if not 2 Reference(s) Current Calib. Interval 7 days Includes extra 25% n/a Ref. 3.1 (Table 3.3.1.1-1, SR 3.3.1.1.2) Desired Calib. Interval 7 days Includes extra 25% n/a Ref. 3.1 (Table 3.3.1.1-1, SR 3.3.1.1.2) Drift Source Vendor Calculated n/a Ref. 1; Ref. 2 Drift Value (% power)

+/- 0.5% FS / 700 hours0.0081 days 0.194 hours 0.00116 weeks 2.6635e-4 months Ref. 4.4 (Section 4.3.3.3)

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 16 of 21 2.3 Power Electronics (cont'd)

Calibration:

Value / equation Sigma if not 3 Reference(s)

Included in APRM calibration ALT APRM Gain Adjustment Factor (AGAF) Comment 11 LAT = ALTComment 11 Input Calibration Tool:

n/aComment 11Accuracy Resolution / Readabilit y Minor Division Upper Range Temperature Effect Input Calibration Standard:

n/aComment 11Accuracy Resolution / Readabilit y Minor Division Upper Range Temperature Effect Output Calibration Tool:

n/aComment 11Accuracy Resolution / Readabilit y Minor Division Upper Range Temperature Effect Output Calibration Standard:

n/aComment 11Accuracy Resolution / Readabilit y Minor Division Upper Range Temperature Effect

Application Specific Input:

Value Sigma if not 2 Reference(s) Minimum No. of LPRMs per APRM Channel 14 of 24 n/a Ref. 4.1 (Sections 3.1.2, 4.1.5); Ref. 4.3 (Table 1) AGAF +/- 2% RTP 3 NEDC-33859P Revision 0 GEH Proprietary Information-Class II (Internal) 17 of 21 3.

SUMMARY

RESULTS Calculated Values Setpoint Function EFWS Value / Equation f (% RTP or % RDF) Applicable Recirc Drive Flow (W d) Range (% RDF) Meets LER Avoidance Criteria ff Meets STA Criteria fff Constant Power Line Setpoint PBSP-Trip Scram AL: 42.6 % RTP AV: 40.6 NTSP: 38.6 0 W d 29.0 0 W d 30.3 0 W d 31.3 Yes Yes Constant Power Line Setpoint PBSP-RB Rod Block DL: n/a AV: 30.3 % RTP NTSP: 28.3 0 W d 30.3 0 W d 31.3 Yes n/a WBSP-Break - Flow Breakpoint Setpoint AL: 29.0 % RDF AV: 30.3 NTSP 31.3 See previous column n/a n/a Sloped Line Setpoint Scram AL 2.49 W d + (-29.61) % RTP AV: 2.49 W d + (-34.8) NTSP: 2.49 W d + (-39.3) 29.0 < W d 45.5 30.3 < W d 46.9 31.3 < W d 47.9 Yes Yes Sloped Line Setpoint Rod Block DL: n/a AV: 2.49 W d + (-45.1) % RTP NTSP: 2.49 W d + (-49.6) 30.3 < W d 52.9 31.3 < W d 53.9 Yes n/a Constant Flow Line (Flow Clamp) Setpoint WBSP-Trip (Scram) AL: 45.5 % RDF AV: 46.9 NTSP: 47.9 See previous column Yes Yes Constant Flow Line (Flow Clamp) Setpoint WBSP-RB (Rod Block)

DL: n/a AV: 52.9 % RDF NTSP: 53.9 See previous column Yes n/a f See Comment 19 and Comment 20.

ff See Comment 26.

fff See Comment 15 and Comment 19.

NEDC-33859P Revision 0 GEH Proprietary Information-Class II (Internal) 18 of 21 4. COMMENTS AND RECOMMENDATIONS

1. Unless specifically identified as "bias" errors in this document, all instrument uncertainty errors will be considered to be random in nature, even when the "

+/-" symbol is not shown.

2. Some plant specific information has not been provided or is not currently available in the current MNGP setpoint document, but is considered unnecessary because the effects of this information are included within the instrument accuracy values or are not necessary for setpoint evaluation.

3. Spurious trip avoidance (STA) evaluations are not performed for Rod Blocks or permissives per GEH setpoint methodology (References 1 and 2), such as the EFWS APRM Rod Blocks. Therefore, the OLs are not applicable.

4. Seismic effect, radiation effect, humidity effect, power supply effect, RFI/EMI effect, and insulation resistance effect errors are marked "negligible" or "included in accuracy" and are considered to have negligible impact on the manufacturer's accuracy terms if they are not identified separately.

5. Per References 1 and 2, overpressure effects are applicable only to pressure measurement devices (e.g., differential pressure transmitters), and static pressure effects are applicable only to differential pressure measurement devices. These effects are marked "n/a" for other devices or not considered.

6. In general, the EFWS APRM Scram and Rod Block functions are only required during normal operating conditions. Therefore, the Seismic Effect for the flow transmitters and associated electronics is not considered in this evaluation.

7. The current approach in GEH setpoint calculation methodology treats the Flow Transmitter Drift for this instrument to be a 2-sigma value.

8. The error of the calibration standard used to calibrate a calibration tool is conservatively assumed to be equal to the error of the calibration tool.

9. The accuracy of the flow electronics is not given in the NUMAC specifications, and [[

° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ]] The combined error for the loop flow electronics is +/- 0.122 mA at 2. 10. The NUMAC electronics are typically located in the Control Building at BWR plants, where the radiation dose is expected to be negligible. At MNGP, the electronics will be located in the Administration Building, which is also expected to have negligible radiation dose.

11. The APRM subsystem is calibrated on-line weekly (Reference 3.1) using the AGAF process, where the gain of the APRMs is adjusted to read the Core Thermal Power (CTP) determined by the Process Computer (P/C), within a specified As Left Tolerance (ALT). [[

° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° °

]]

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 19 of 21 Thus, the only calibration error to consider for the APRM electronics sub-loop is the ALT specified by the AGAF process.

12. [[° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ]] Because the EFWS setpoints are calculated as TLO setpoints, and no separate SLO setpoints are calculated, (see Comment 23), there is no need to adjust them if the plant is placed into SLO. Therefore the TLO to SLO Setting Adjustment for the Sloped line Setpoint functions and the constant Flow Line (Flow Clamp) setpoint functions is zero.

13. Each of the EFWS APRM setpoint functions is based on the STP signal. The neutron noise value is applied to the EFWS APRM Constant Power Line Setpoints (PBSP), the Sloped Line Setpoint functions, and the Constant Flow Line (Flow Clamp) Setpoints (WBSP). 14. Complete inputs are unavailable for the Flow Electronic calibration errors for all Maintenance and Testing Equipment (M&TE) to be used at MNGP. Therefore, the Flow Electronics calibration errors are based on using errors that are 10% higher than the errors for assumed calibration tools. Moreover, the error of the calibration standard used to calibrate a calibration tool is conservatively assumed to be equal to the error of the calibration tool.

15. Per GEH setpoint methodology (Reference 1 and Reference 2), [[

° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ]] 16. [[° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ]] (Reference 2 Section 4.5.3)

17. For the EFWS APRM Scrams, the OLs were set equal to the associated EFWS Rod Block NTSPs from Section 3. During a power or flow transient, the Rod Block would be reached first, with some margin to the Scram, consistent with GEH setpoint methodology.

18. The Neutron Monitoring System performs its trip functions before accident temperatures are reached, so temperatures for trip and normal conditions are assumed to be the same.

19. For the EFWS APRM Rod Block setpoint functions, the proper terminology is "Design Limit" (DL) instead of "Analytical Limit," because there are no accident or transient analyses based on these Rod Blocks. The EFWS APRM Rod Block AVs were selected based on engineering judgment with a minimum specified margin (i.e., 6%) away from the EFWS APRM Scram AVs. This margin was increased for the Constant Power Setpoint and the Sloped Line Setpoint functions to 10.3% to ensure the STA evaluation for these Scram setpoint functions met the STA Criteria, and to ensure that the WBSP - Flow Breakpoint Setpoint between the Constant Power and Sloped Line for the Rod Block and Scram functions are the same, a PRNM equipment requirement.

20. Scram AVs and NTSPs and Rod Block NTSPs were calculated using the methodology of Ref. 1 and Ref. 2. However, for consistency and for conservatism, the Rod Block NTSPs were selected with a specified margin (i.e., same as discussed in Comment 19) further away from the EFWS APRM Scram NTSPs, also moving them slightly further away from the AVs.

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 20 of 21 21. The Allowed Value may be retained in the Technical Specifications or a supporting document such as the Technical Requirements Manual or the Core Operating Limits Report (COLR). 22. The APRM FB Clamp AVs at high Recirc flows do not change for MELLLA+ (Ref. 5.11 (and inputs file with markups)). Therefore, the associated NTSPs also do not change for MELLLA+. 23. Per guidance from MNGP, the EFWS setpoint functions are to be calculated using the TLO instrument errors, rather than the SLO instrument errors. The setpoints above the Flow Clamp are separate for TLO and SLO. There will be only one set of EFWS setpoints in the instability region. Two sets of flow biased setpoints remain for TLO and SLO above the Flow Clamp.

24. Per Ref. 4.4, the flow intersection (i.e., the WBSP - Flow Breakpoint Setpoint) between EFWS APRM Constant Power and Sloped Line setpoint functions must be the same for Scram and Rod Block.

25. Per Ref. 4.4, the Flow Clamp may have different values for Scram and Rod Block, and each can vary up to 70% Drive flow.

26. The Licensee Event Report (LER) Avoidance tests used Z = 0.81, as is the standard practice for GEH setpoint calculations for multiple channel setpoint functions. For the PRNM APRM channel logic to the Reactor Protection System, this results in a LER Avoidance probability of approx. 80.5 percent.

27. Transfer functions used in this calculation: Flow Transmitter: Output (mA) is linearly converted from input (InWC). Flow Electronics: Output is proportional to the square root of the two inputs, which are then summed. Power Electronics: Output is proportional to the average of the inputs and a comparison of the APRM signal with the flow biased reference is made.

NEDO-33859 Revision 0 Non-Proprietary Information-Class I (Public) 21 of 21 5. REFERENCES

1. GE Nuclear Energy, "General Electric Methodology for Instrumentation Technical Specification and Setpoint Analysis," NEDC-32889P, Revision 3, November 2002.

2. GE Nuclear Energy, "General Electric Instrument Setpoint Methodology," NEDC-31336P-A, September 1996.

3. Monticello Nuclear Generating Plant Licensing and related documents: 3.1. Monticello Nuclear Generating Plant Technical Specifications, as revised through April 15, 2014. 3.2. Monticello Nuclear Generating Plant Technical Requirements Manual (TRM), as revised through April 15, 2014.

4. Vendor Specifications 4.1. GE 24A5221NF, Rev. 2, "PRNM Requirements Specification," Data Sheet, NMS (Monticello), February 13, 2008. 4.2. GE 24A5221, Rev. 17, "NUMAC Power Range Neutron Monitor System," Requirements Specification, NUMAC, July 21, 2008. 4.3. GE 26A7534NF, Rev. 2, "NUMAC Average Power Range Neutron Monitor with DSS-CD," Data Sheet, Power Range NMS (MNGP), May 29, 2008. 4.4. GE 26A7534, Rev. 0, "NUMAC Power Range Neutron Monitor with DSS-CD,"

Design Specification, NUMAC PRNM, February 19, 2008. 4.5. GE 23A5082, Rev. 1, "NUMAC Requirements Specification," Design Spec, August 9, 1995. 4.6. Rosemount Nuclear specification sheet 00809-0100-4235, Rev. AA, "Model 1152 Alphaline Nuclear Pressure Transmitter," June 1999, provided in Monticello Plant Technical Manual NX-17137.