CNS-16-045, Unit 2, Ufsar/Selected Licensee Commitment Changes

Unit 2, Ufsar/Selected Licensee Commitment Changes

ML16168A044
Person / Time
Site:	Catawba
Issue date:	06/14/2016
From:	Henderson K Duke Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CNS-16-045
Download: ML16168A044 (19)

Text

.- Kelvin Henderson

£~DUKE*:. Vice President

~ ENERG'l Catawba Nuclear Station Duke Energy CN01VP I 4800 Concord Road York, SC 29745 o: 803. 701.4251 f: 803.701.3221 CNS-16-045 June 14, 2016 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555-0001

Subject:

• Duke Energy Carolinas, LLC Catawba Nuclear Station, Unit 1 and Unit 2 Docket Nos. 50-413 and 50-414 UFSAR/Selected Licensee Commitment Changes Pursuant to 10CFR 50. 71 (e ), please find attached changes to the Catawba Nuclear Station Selected Licensee Commitments Manual. This document constitutes Chapter 16 of the Updated Final Safety Analysis Report (UFSAR).

Any questions regarding this information should be directed to Larry Rudy, Regulatory Affairs, at (803) 701-3084.

I certify that I am a duly authorized officer of Duke Energy Carolinas, LLC, and that the information contained herein accurately represents changes made to Chapter 16 of the UFSAR since the previous submittal.

Kelvin Henderson Vice President, Catawba Nuclear Station Attachment

\

U.S. Nuclear Regulatory Commission June 14, 2016 Page 2 xc: Catherine Haney, Regional Administrator U. S. Nuclear Regulatory Commission, Region II Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, GA 30303-1257 M. D. Orenak NRC Project Manager (CNS)

U.S. Nuclear Regulatory Commission One White Flint North, Mail Stop 8 G9A 11555 Rockville Pike Rockville, MD 20852 G. A. Hutto, Senior Resident Inspector Catawba Nuclear Station

Duke Energy

~~DUKE CN01VP I 4800 Concord Road

~ ENERG't York, SC 29745 June 14, 2016 Re: Catawba Nuclear Station Selected Licensee Commitments Manual Revision Date: 04/29/2016 Attached are revisions to the Catawba Nuclear Station Selected Licensee Commitments Manual. Please remove and replace the following pages:

REMOVE THESE PAGES INSERT THESE PAGES LIST OF EFFECTIVE SECTIONS Pages 1 through 4 Pages 1 through 5 Revision 63 Revision 64 TAB 16.0 - TABLE OF CONTENTS Pages i through v Pages i through v Revision 14 Revision 15 TAB 16.7 SLC 16.7-18-1 through 16.7-18-6 Revision 0 If you have any questions concerning the contents of this package update, contact Toni Lowery at (803)701-5046.

~~~{\

Cecil Fletcher Regulatory Affairs Manager Attachment

LIST OF EFFECTIVE SECTIONS SECTION REVISION NUMBER REVISION DATE TABLE OF CONTENTS 15 05/10/16 16.1 1 08127108 16.2 2 08/21/09 16.3 1 08/21/09 16.5-1 3 08/19/15 16.5-2 Deleted 16.5-3 1 02/20/04 16.5-4 0 10/09/02 16.5-5 1 01/28/10 16.5-6 1 08/21/09 16.5-7 2 02/06/15 16.5-8 2 12/22/08 16.5-9 1 02/20/12 16.5-10 Deleted 16.6-1 0 10/09/02 16.6-2 Deleted 16.6-3 1 08/21/09 16.6-4 1 08/21/09 16.6-5 2 01 /09/13 16.7-1 1 08/21/09 16.7-2 4 02/03/11 16.7-3 4 07/27/13 16.7-4 2 08/21/09 16.7-5 2 08/21/09 Catawba Units 1 and 2 Page 1 Revision 64

LIST OF EFFECTIVE SECTIONS SECTION REVISION NUMBER REVISION DATE 16.7-6 2 08/21/09 16.7-7 1 08/21/09 16.7-8 2 08/21/09 16.7-9 9 06/06/13 16.7-10 7 03/28/16 16.7-11 1 08/21/09 16.7-12 1 08/21/09 16.7-13 2 08/21/09 16.7-14 1 08/21/09 16.7-15 1 08/21/09 16.7-16 0 06/08/09 16.7-17 0 02/10/15

• 16.7-18 16.8-1 16.8-2 0

6 2

05/10/16 12/10/15 02/20/12 16.8-3 1 10/24/06 16.8-4 2 11/05/07 16.8-5 3 08/21/09 16.9-1 7 10/24/11 16.9-2 5 10/24/11 16.9-3 3 02/03/11 16.9-4 3 08/21/09 16.9-5 6 06/23/10 16.9-6 10 02/10/15 Catawba Units 1 and 2 Page 2 Revision 64

LIST OF EFFECTIVE SECTIONS SECTION REVISION NUMBER REVISION DATE

• 16.11-2 16.11-3 16.11-4 4

0 1

02/10/15 10/09/02 08/21/09 16.11-5 0 10/09/02 16.11-6 3 08/03/15 16.11-7 9 02/10/15 16.11-8 0 10/09/02 16.11-9 0 10/09/02 16.11-10 1 08/21/09 16.11-11 1 03120103 16.11-12 0 10/09/02 16.11-13 1 07/27/13

• 16.11-14 16.11-15 16.11-16 0

0 1

10/09/02 10/09/02 10/24/11 16.11-17 0 10/09/02 16.11-18 1 08/21/09 16.11-19 0 10/09/02 16.11-20 2 03/28/16 16.11-21 0 10/09/02 16.12-1 0 10/09/02 16.13-1 0 10/09/02 16.13-2 Deleted 16.13-3 Deleted Catawba Units 1 and 2 Page 4 Revision 64

LIST OF EFFECTIVE SECTIONS REVISION NUMBER REVISION DATE SECTION 16.13-4 0 10/09/02

• Catawba Units 1 and 2 Page 5 Revision 64

TABLE OF CONTENTS SECTION TITLE PAGE

• 16.1 16.2

16.3 INTRODUCTION

APPLICABILITY DEFINITIONS 16.1-1 16.2-1 16.3-1 16.4 COMMITMENTS RELATED TO REACTOR COMPONENTS 16.5 COMMITMENTS RELATED TO REACTOR COOLANT SYSTEM 16.5-1 Reduced Inventory and Mid-Loop Operation with Irradiated 16.5-1-1 Fuel in the Core 16.5-2 Deleted 16.5-3 Chemistry 16.5-3-1 16.5-4 Pressurizer 16.5-4-1 16.5-5 Structural Integrity 16.5-5-1 16.5-6 Reactor Coolant System Vents 16.5-6-1

• 16.5-7 16.5-8 16.5-9 Steam Generator Pressure/Temperature Limitation Reactor Pressure Vessel (RPV) Head Inspection Operation with Irradiated Fuel in the Core with Steam Generator (SGJ Nozzle Dams Installed or Cold Leg 16.5-7-1 16.5-8-1 16.5-9-1 Opening .:::_ 1 in 16.5-10 Deleted 16.6 COMMITMENTS RELATED TO ENGINEERED SAFETY FEATURES 16.6-1 Containment Sump 16.6-1-1 16.6-2 Deleted 16.6-3 Inlet Door Position Monitoring System 16.6-3-1 16.6-4 Chlorine Detectors and Associated Circuitry 16.6-4-1 16.6-5 Residual Heat Removal/Containment Spray Sump Pump 16.6-5-1 Interlock

• Catawba Units 1 and 2 Revision 15

TABLE OF CONTENTS SECTION TITLE PAGE

• 16.7 16.7-1 16.7-2 COMMITMENTS RELATED TO INSTRUMENTATION ATWS Mitigation System Actuation Circuitry (AMSAC)

Seismic Instrumentation 16.7-1-1 16.7-2-1 16.7-3 Meteorological Instrumentation 16.7-3-1 16.7-4 Loose-Part Detection System 16. 7-4-1 16.7-5 Turbine Overspeed Protection 16. 7-5-1 16.7-6 RN Discharge Instrumentation 16.7-6-1 16.7-7 Movable lncore Detectors 16.7-7-1 16.7-8 Groundwater Level 16. 7-8-1 16.7-9 Standby Shutdown System 16.7-9-1 16.7-10 Radiation Monitoring for Plant Operations 16.7-10-1 16.7-11 Position Indication System - Shutdown 16.7-11-1

• 1,6.7-12 16.7-13 Position Indication System - Test Exceptions Auxiliary Feedwater (AFW) Pump Turbine Steam Supply Piping Temperature Monitoring System 16.7-12-1

16. 7-13-1 16.7-14 Trip of All Main Feedwater Pumps Turbine Trip 16.7-14-1 Instrumentation 16.7-15 Hydrogen Monitors 16.7-15-1 16.7-16 Reactor Trip Breaker and Solid State Protection System 16.7-16-1 (SSPS) Logic Train Out of Service Commitments 16.7-17 Spent Fuel Pool (SFP) Wide Range (WR) Level 16.7-17-1 Instrumentation 16.7-18 Leading Edge Flow Meter (LEFM) System 16.7-18-1 16.8 COMMITMENTS RELATED TO ELECTRICAL POWER SYSTEMS 16.8-1 Containment Penetration Conductor Overcurrent Protective16.8-1-1 Devices

• 16.8-2 230 kV Switchyard Systems Catawba Units 1 and 2 ii 16.8-2-1 Revision 15

TABLE OF CONTENTS SECTION TITLE PAGE

• 16.8-3 16.8-4 16.8-5 230 kV Switchyard 125 VDC Power System 6900 V Standby Transformers Diesel Generator Supplemental Testing Requirements 16.8-3-1 16.8-4-1 16.8-5-1 16.9 COMMITMENTS RELATED TO AUXILIARY SYSTEMS 16.9-1 Fire Suppression Water Systems 16.9-1-1 16.9-2 Spray and/or Sprinkler Systems 16.9-2-1 16.9-3 C02 Systems 16.9-3-1 16.9-4 Fire Hose Stations 16.9-4-1 16.9-5 Fire Rated Assemblies 16.9-5-1 16.9-6 Fire Detection Instrumentation 16.9-6-1 16.9-7 Boration Systems Flow Path - Shutdown 16.9-7-1 16.9-8 Boration Systems Flow Paths - Operating 16.9-8-1

• 16.9~9 16.9-10 16.9-11 Boration Systems Pumps - Shutdown Boration Systems Charging Pumps - Operating Boration Systems Borated Water Source - Shutdown 16.9-9-1 16.9-10-1 16.9-11-1 16.9-12 Boration Systems Borated Water Sources - Operating 16.9-12-1 16.9-13 Snubbers 16.9-13-1 16.9-14 Lake Wylie Water Temperature 16.9-14-1 16.9-15 Auxiliary Building Filtered Exhaust System Filter Cooling 16.9-15-1 Bypass Valves 16.9-16 Fuel Handling Ventilation Exhaust System Filter Cooling 16.9-16-1 Bypass Valves 16.9-17 Refueling Operations - Decay Time 16.9-17-1 16.9-18 Refueling Operations - Communications 16.9-18-1 16.9-19 Refueling Operations - Manipulator Crane 16.9-19-1

• Catawba Units 1 and 2 iii Revision 15

TABLE OF CONTENTS SECTION TITLE PAGE

• 16.9-20 16.9-21 Refueling Operations - Crane Travel - Spent Fuel Storage16.9-20-1 Pool Building Refueling Operations - Storage Pool Water Level 16.9-21-1 16.9-22 Control Room Area Ventilation System - Intake Alarms 16.9-22-1 16.9-23 Fire Hydrants 16.9-23-1 16.9-24 Alternate Cooling for Charging Pumps 16.9-24-1 16.9-25 Tornado Isolation Dampers 16.9-25-1 16.9-26 Commitments Associated With Movement of Non-Recently16.9-26-1 Irradiated Fuel Assemblies 16.10 COMMITMENTS RELATED TO STEAM AND POWER CONVERSION SYSTEMS 16.10-1 Steam Vent to Atmosphere 16.10-1-1 16.10-2 Condenser Circulating Water System 16.10-2-1

• 16.10-3 16.11 16.11-1 Auxiliary Feedwater (AFW) Flow Control Valve Air Accumulators COMMITMENTS RELATED TO RADIOACTIVE WASTE MANAGEMENT Liquid Effluents 16.10-3-1 16.11-1-1 16.11-2 Radioactive Liquid Effluent Monitoring Instrumentation 16.11-2-1 16.11-3 Dose 16.11-3-1 16.11-4 Liquid Radwaste Treatment System 16.11-4-1 16.11-5 Chemical Treatment Ponds 16.11-5-1 16.11-6 Gaseous Effluents 16.11-6-1 16.11-7 Radioactive Gaseous Effluent Monitoring Instrumentation 16.11-7-1 16.11-8 Dose - Noble Gases 16.11-8-1 16.11-9 Dose - lodine-131, lodine-133, Tritium, and Radioactive 16.11-9-1 Material in Particulate Form

• 16.11-10 Gaseous Radwaste Treatment System Catawba Units 1 and 2 iv 16.11-10-1 Revision 15

TABLE OF CONTENTS SECTION TITLE PAGE

• 16.11-11 16.11-12 16.11-13 Solid Radioactive Wastes Total Dose Monitoring Program 16.11-11-1 16.11-12-1 16.11-13-1 16.11-14 Land Use Census 16.11-14-1 16.11-15 lnterlaboratory Comparison Program 16.11-15-1 16.11-16 Annual Radiological Environmental Operating Report and 16.11-16-1 Annual Radioactive Effluent Release Report 16.11-17 Liquid Holdup Tanks 16.11-17-1 16.11-18 Explosive Gas Mixture 16.11-18-1 16.11-19 Gas Storage Tanks 16.11-19-1 16.11-20 Explosive Gas Monitoring Instrumentation 16.11-20-1 16.11-21 Major Changes to Liquid, Gaseous, and Solid Radwaste 16.11-21-1 Treatment Systems

• 16.12 16.12-1 16.13 COMMITMENTS RELATED TO RADIATION PROTECTION Sealed Source Contamination COMMITMENTS RELATED TO CONDUCT OF OPERATIONS 16.12-1-1 16.13-1 Fire Brigade 16.13-1-1 16.13-2 Deleted 16.13-3 Deleted 16.13-4 Minimum Station Staffing Requirements 16.13-4-1

• Catawba Units 1 and 2 v Revision 15

LEFM System 16.7-18 16.7 INSTRUMENTATION

• 16.7-18 COMMITMENT Leading Edge Flow Meter (LEFM) System The LEFM System consisting of an ultrasonic flow measuring device in each feedwater loop shall be FUNCTIONAL.

APPLICABILITY: MODE 1.

REMEDIAL ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. LEFM System non- A.1 Restrict thermal power to Immediately functional when thermal ~ 98.32% RTP (~ 3411 power is ~ 98.32% RTP MWt).

(~ 3411 MWt).

B. LEFM System non- B.1 --------------NOTE--------------

functional when thermal Normal variations in power, power level is > 98.32% such as those associated

• RTP (> 3411 MWt). with plant fluctuations and boron adjustment, are permitted.

Suspend operations Immediately involving increasing thermal power.

AND B.2 Restore LEFM System to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> FUNCTIONAL status.

c. Required Action and C. 1 Reduce thermal power to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> associated Completion ~ 98.32% RTP (~ 3411 Time of Condition B not MWt).

met.

AND C.2 Suspend use of LEFM 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> System data as input to thermal power calorimetric

• Catawba Unit 1 calculation .

16. 7-18-1 Revision 0

LEFM System 16.7-18 TESTING REQUIREMENTS TEST FREQUENCY TR 16.7-18-1 Verify LEFM System is FUNCTIONAL by 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> verifying:

a. LEFM System mode is either Normal or Alert - Maintenance, and

b. Verify use of LEFM System data as input to thermal power calorimetric calculation.

TR 16.7-18-2 Perform CHANNEL CALIBRATION on the LEFM 24 months System pressure transmitters in accordance with plant procedures.

BASES The FUNCTIONALITY of the Leading Edge Flow Meter (LEFM) System ensures the system is able to measure and calculate the required feedwater parameters at the required uncertainty level to be used as input to the Thermal Power Best Estimate (TPBE) calorimetric calculation.

Catawba Nuclear Station Unit 1 was initially licensed to operate at a maximum reactor Rated Thermal Power (RTP) level of 3411 megawatts thermal (MWt). A power uprate to a RTP level of 3469 MWt is based on a redistribution of analytical margin originally required of Emergency Core Cooling System (ECCS) evaluation models performed per the requirements of 10 CFR 50, Appendix K, "ECCS Evaluation Models". Appendix K originally mandated 102% of licensed power level for light water reactor ECCS evaluation models. The NRC approved a change to the 10 CFR 50, Appendix K requirements on June 1, 2000. This change provided licensees the option of maintaining the 2% power margin between the licensed power level and the ECCS evaluation assumed power level, or applying a reduced ECCS evaluation margin based on an accounting of uncertainties due to instrumentation error.

Feedwater flow measurement uncertainty is the most significant contributor to uncertainty in the secondary calorimetric calculation used to determine core thermal power. The LEFM System provides a more accurate measurement of feedwater flow compared to the feedwater flow venturi and thus reduces the uncertainty in the feedwater flow measurement. This reduced uncertainty, in combination with other uncertainties, results in an ove'rall thermal power level measurement uncertainty of~ 0.3% RTP. The remaining margin to the previous 2% uncertainty of 1. 7% RTP is the basis for the power uprate. This type of power uprate is referred to as a Measurement Uncertainty Recapture (MUR)

Uprate.

The LEFM System utilizes two ultrasonic flow measuring planes in each feedwater loop to measure feedwater parameters for use as input to the TPBE calorimetric calculation. The LEFM System main feedwater mass flow rate and Catawba Unit 1 16.7-18-2 Revision 0

LEFM System 16.7-18 BASES (continued) temperature values are used directly in the TPBE calorimetric calculation.

Concurrently, correction factors are continuously calculated based on the difference between the LEFM System mass flow rate and temperature values and the existing main feedwater flow venturi flow and temperature values.

Should the LEFM System become non-functional, the last good correction factors are used to normalize the existing main feedwater flow venturi mass flow and temperature signals to the more accurate LEFM System signals. The normalized main feedwater mass flow and temperature signals are then used in the TPBE calorimetric calculation.

The LEFM System is FUNCTIONAL if the system is in service with the ability to measure and calculate feedwater mass flow and feedwater temperature at the required uncertainty level to be used as input to the TPBE calorimetric calculation.

The LEFM System can be in Maintenance Mode or one of three different Operational Modes: 1) Normal, 2) Alert - Maintenance, and 3) Fail. Of these four modes, the LEFM System is capable of measuring and calculating the required feedwater parameters at the required uncertainty level in Normal and Alert -

Maintenance Modes only.

The table on the next page describes the FUNCTIONAL status of the LEFM System corresponding to the Maintenance Mode and the three different Operational Modes of the LEFM System .

• Catawba Unit 1 16.7-18-3 Revision O

LEFM System 16.7-18 BASES (continued)

LEFM System Mode

• Discussion FUNCTIONALITY Operational Mode The LEFM System is capable of FUNCTIONAL.

Normal measuring and calculating the required feedwater parameters at the required uncertainty level. The Main Control Board (MCB) annunciator will not be triggered.

The Operator Aid Computer (OAC) and/or the local LEFM System Central Processing Unit (CPU) cabinet display screen will display NORMAL.

Operational Mode The LEFM System has FUNCTIONAL Alert - Maintenance experienced a minor maintenance issue/minor alert. However, the system remains capable of measuring and calculating the required feedwater parameters at the required uncertainty level. The MCB annunciator will not be triggered. The OAC and/or the local LEFM System CPU cabinet display screen will display MINOR ALERT.

Operational Mode The LEFM System has Non-functional Fail experienced a failure such that the system is no longer capable of measuring and calculating the required feedwater parameters at the required uncertainty level. The MCB annunciator will be triggered.

The OAC and/or the local LEFM System CPU cabinet display screen will display MAJOR ALERT.

Maintenance Mode The system is not capable of Non-functional measuring and calculating the required feedwater parameters at the required uncertainty level. The MCB annunciator will be triggered.

The OAC and/or the local LEFM System CPU cabinet display screen will display FAILED.

• FUNCTIONAL if the required feedwater parameters, as measured and calculated by the LEFM System, are being used as input to the TPBE calorimetric calculation. Otherwise, non-functional.

• Catawba Unit 1 16.7-18-4 Revision 0

LEFM System 16.7-18 BASES (continued)

Non-functional LEFM System while unit is > 98.32% RTP (> 3411 MWt):

As described in Condition B, when the LEFM System becomes non-functional, operations involving increasing thermal power must be suspended immediately and the LEFM System shall be restored to FUNCTIONAL status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

Normal variations in power, such as those associated with plant fluctuations and boron adjustment, are permitted. Correction factors locked in and used in the TPBE calorimetric calculation are specific to the unit thermal power at the time the LEFM System became non-functional. If thermal power were increased, the use of the locked in correction factors at higher thermal power levels may introduce an additional error that could result in the unit exceeding the licensed RTP limit of 3469 MWt. When an LEFM System becomes non-functional, the last good correction factors are locked in and applied to the feedwater flow venturi measurement. While the system is non-functional, analysis has demonstrated the drift associated with the flow venturi instrumentation providing variables to the TPBE calorimetric calculation will be minimal over a 72-hour period and the unit can continue to operate over this time period with a non-functional LEFM System without exceeding the licensed RTP limit of 3469 MWt.

If the Required Action and Completion Time of Condition B cannot be met, Condition C will be entered. Within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> unit thermal power shall be reduced to ~ 98.32% RTP (~ 3411 MWt) and the use of LEFM data as input to the TPBE calorimetric calculation shall be suspended. The reduction in thermal power ensures the drift associated with the flow venturi instrumentation providing variables to the TPBE calorimetric calculation will not be sufficient to result in the unit exceeding the licensed RTP limit of 3469 MWt. Suspending the LEFM data input to the TPBE calorimetric calculation is warranted since, at these reduced thermal power levels, the reduced uncertainty provided by the LEFM System is not needed.

Unit thermal power could be decreased during the Condition B required Completion Time of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> since any error introduced by decreasing thermal power would be considered conservative and would not contribute to the possibility of the unit exceeding the licensed RTP limit of 3469 MWt. If unit thermal power is decreased to a point~ 98.32% RTP (~ 3411 MWt), Condition B will be exited and the Required Action and Completion Time of Condition A would apply.

Non-functional LEFM System while unit is ~ 98.32% RTP (~ 3411 MWt):

As described in Condition A, when the LEFM System becomes non-functional, unit thermal power shall be immediately restricted to ~ 98.32% RTP (~ 3411 MWt) since, above 3411 MWt, the reduced uncertainty provided by the LEFM System is needed to ensure unit operation at ~ 3469 MWt does not exceed the uncertainty-adjusted licensed RTP limit of 3479 MWt. The unit can remain at~

3411 MWt indefinitely with a non-functional LEFM System since any reduced uncertainty provided by the system is not needed to preclude the unit from exceeding the uncertainty-adjusted RTP limit of 3479 MWt.

• The LEFM System Testing Requirements (TRs) provide assurance that the minimum FUNCTIONALITY requirements of the LEFM System are met.

Catawba Unit 1 16.7-18-5 Revision 0

LEFM System 16.7-18 BASES (continued)

TR 16.7-18-1 ensures the LEFM System is in Normal or Alert- Maintenance Operational Modes which are the only modes where the system has the capability to measure and calculate feedwater mass flow and feedwater temperature at the required uncertainty level to be used as input to the TPBE calorimetric calculation. This TR also verifies the LEFM System data is being used as input to thermal power calorimetric calculation.

TR 16.7-18-2 requires the LEFM System to be calibrated on a periodic basis and applies to all eight feedwater pressure transmitters (two per loop) providing input to the LEFM System. This calibration ensures the measurement uncertainty of the outputs from these pressure transmitters remains bounded by the analysis and assumptions set forth in Reference 3.

REFERENCES 1. Duke Energy letter to NRC dated June 23, 2014, License Amendment Request for Measurement Uncertainty Recapture Power Uprate (CNS-14-076).

2. NRC letter to Duke Energy dated April 29, 2016, Catawba Nuclear Station, Units 1 and 2 - Issuance of Amendments Regarding Measurement Uncertainty Recapture Power Uprate (CAC Nos.

MF4526 and MF4527).

3. Cameron Engineering Report: ER-996 Revision 1, "Bounding Uncertainty Analysis for Thermal Power Determination at Catawba Unit 1 Nuclear Generating Station Using the LEFM ;/+ System",

dated January 2013.

Catawba Unit 1 16.7-18-6 Revision 0