ML091680143

From kanterella
Jump to navigation Jump to search
Core Operating Limits Report (COLR) for Cycle 16 Operation
ML091680143
Person / Time
Site: Browns Ferry Tennessee Valley Authority icon.png
Issue date: 06/12/2009
From: West R
Tennessee Valley Authority
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
TVA-COLR-BF2C16, Rev 0
Download: ML091680143 (32)
v • d • e


Text

Tennessee Valley Authority, Post Office Box 2000, Decatur, Alabama 35609-2000 June 12, 2009 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Stop: OWFN, P1-35 Washington, D.C. 20555-0001 In the Matter of ) Docket No. 50-260 Tennessee Valley Authority )

BROWNS FERRY NUCLEAR PLANT (BFN) - UNIT 2 - CORE OPERATING LIMITS REPORT (COLR), FOR CYCLE 16 OPERATION In accordance with the requirements of Technical Specification 5.6.5.d, enclosed is the Unit 2 Cycle 16, Core Operating Limits Report.

There are no new commitments contained in this letter. If you have any questions, please contact F. R. Godwin at (256) 729-2636.

(ncerely, R. G. West Site Vice President Enclosure cc: See page 2 koo

U.S. Nuclear Regulatory Commission Page 2 June 12, 2009 Enclosure cc (Enclosure):

Ms. Eva A. Brown, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North (MS 08G9) 11555 Rockville Pike Rockville, Maryland 20852-2739 Mr. Eugene F. Guthrie, Branch Chief U.S. Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center 61 Forsyth Street, S.W., Suite 23T85 Atlanta, Georgia 30303-8931 NRC Resident Inspector Browns Ferry Nuclear Plant 10833 Shaw Road Athens, Alabama 35611-6970

ENCLOSURE TENNESSEE VALLEY AUTHORITY BROWNS FERRY NUCLEAR PLANT (BFN)

UNIT 2 CORE OPERATING LIMITS REPORT (COLR)

FOR CYCLE 16 OPERATION (SEE ATTACHED)

QA Document TVA Nuclear Non-Proprietary Page 1

[ Nuclear Nuclear Fuel Design - BWRFE 1101 Market Street, Chattanooga; TN 37402 Browns Ferry Unit 2 Cycle 16 Core Operating Limits Report, (COLR, for 105% OLTP)

TVA-COLR-BF2C1 6 Revision 0 (Final)

March 2009 Prepar ..-- j'_-' K/ c. Date: Af / -

"--'.W. Eichenberg rtpeils Verified: Date: oo

,B-ýMitchell, Engineer Approved: ~c' Date: ~/~o1o?

G. C. Storey, Manager, Fuel Engineering Reviewed: Date: 1/74

  • Z Keck, Supervisor, Reactor Engineering Approved: 0 ., Date: /

thig IP~

EDMS: L32 090330 800 BFE-2786, Revision 0 (Final)

Pages Affected: All

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 2 Table of Contents Total Number of Pages = 29 (including review cover sheet)

List of Tables ................................................................................................................................. 3 Lis t o f F ig u re s ............................................................................................................................... 4 Revision Log ................................................................................................................................. 5 Nom enclature ................................................................................................................................ 6 References .................................................................................................................................... 8 1 Introduction ........................................................................................................................ 10 1 .1 P urp o s e ....................................................................................................................... 10 1 .2 S c o pe .......................................................................................................................... 10 1.3 Fuel Loading ................................................................................................................ 10 1.4 Acceptability ................................................................................................................ 10 2 APLHG R Lim its .................................................................................................................. 12 2.1 Rated Power and Flow Lim it: APLHG RRATED ......................................................... 12 2.2 Off-Rated Power Dependent Lim it: APLHG Rp ...................................................... 12 2.3 Off-Rated Flow Dependent Lim it: APLHG RF ......................................................... 12 2.4 Single Loop O peration Lim it: APLHG RSLO ............................................................. 12 2.5 Equipm ent O ut-Of-Service Corrections ................................................................... 14 3 LHG R Lim its ....................................................................................................................... 15 3.1 Rated Power and Flow Lim it: LHG RRATED ................................................................ 15 3.2 Off-Rated Power Dependent Lim it: LHG Rp ........................................................... 15 3.3 Off-Rated Flow Dependent Lim it: LHG RF ............................................................... 15 3.4 Equipm ent O ut-Of-Service Corrections ................................................................... 15 4 O LM CPR Lim its ................................................................................................................. 19 4.1 Flow Dependent MCPR Lim it: MCPRF ................................................................... 19 4.2 Power Dependent MCPR Lim it: MCPRp ............................................................... 19 4.2.1 Scram Speed Dependent Lim its (TSSS vs. NSS) .......................................... 19 4.2.2 Exposure Dependent Lim its ........................................................................... 21 4.2.3 Equipm ent O ut-Of-Service (EOOS) O ptions .................................................. 22 4.2.4 Single-Loop-O peration (SLO ) Lim its .............................................................. 22 4.2.5 Below Pbypass Lim its .................................................................................... 22 5 APRM Flow Biased Rod Block Trip Settings ................................................................. 27 6 Rod Block Monitor (RBM ) Trip Setpoints and O perability .............................................. 28 7 Shutdow n Margin Lim it.................................................................................................. 29 EDMS: L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 3 List of Tables Nuc le a r F ue l Ty pe s ..................................................................................................................... 11 Nom inal S cram T im e Basis .................................................................................................... 21 MCPRp Limits for Nominal Scram Time Basis ....................................................................... 23 MCPRP Limits for Technical Specification Scram Time Basis .... ........ ....................... 25 Analytical RBM Trip Setpoints ........................................... 28 R B M S etpoint A pplicability .................................................................................................... . . 28 BFE-2786, Revision 0 (Final)

EDMS: 090330 800 L32 090330 EDMS: L32 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 4 List of Figures A PLHG RFRTED for ATRIUM -10 Fuel ........................................................................................ 13 LH G R RATED for ATR IUM-10 Fuel ............................................................................................. 16 LHG RFACp for ATRIUM -10 Fuel .......................................................................................... 17 LHG RFACF for ATRIUM -10 Fuel .......................................................................................... 18 MC PRF for ATR IUM-10 Fuel ................................................................................................. 20 BFE-2786, Revision 0 (Final)

EDMS: L32 090330 800 L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit2 Cyde 16 TVA-COLR-BF2C16 Core Operating Limits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 5 Revision Log Number Page Description 1-RO All New document, per NFDP-1, Section 3.2, Item N.

BFE-2786, Revision 0 (Final)

EDMS: 090330 800 L32 090330 EDMS: L32 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cycle 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 6 Nomenclature APLHGR Average Planar LHGR APRM Average Power Range Monitor AREVA NP Vendor (Framatome, Siemens)

ARTS APRM, Rod Block Monitor, and Technical Specification Improvement Program BOC Beginning of Cycle BWR Boiling Water Reactor CAVEX Core Average Exposure CD Coastdown COLR Core Operating Limits Report CPR Critical Power Ratio CRWE Control Rod Withdrawal Error DTSP Dual TSP EIS Equipment-In-Service EOC End of Cycle EOFP End of Full Power (no ICF or FFWTR)

EOOS Equipment OOS Final Feedwater Temperature Reduction FFWTR FHOOS Feedwater Heaters OOS GWd Giga Watt Day HPSP High PSP HTSP High TSP ICF Increased Core Flow (beyond rated)

IPSP Intermediate PSP ITSP Intermediate TSP LHGR Linear Heat Generation Rate LHGRFAC LHGR Multiplier (Power or Flow dependent)

LPRM Low Power Range Monitor LPSP Low PSP LRNB Generator Load Reject, No Bypass LTSP Low TSP MAPFAC MAPLHGR multiplier (Power or Flow dependent)

MCPR Minimum CPR MSIV Main Steam Isolation Valve MSIVOOS MSIV OOS MSR Moisture Separator Reheater MSROOS MSR OOS MTU Metric Ton Uranium MWd/MTU Mega Watt Day per Metric Ton Uranium BFE-2786, Revision 0 (Final)

EDMS: L32 090330 800 L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cycle 16 TVA-COLR-BF2C16 Core Operating Limits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 7 NEOC Near EOC NFT Nuclear Fuel Type NRC United States Nuclear Regulatory Commission NSS Nominal Scram Speed NTSP Nominal TSP OLMCPR MCPR Operating Limit OOS Out-Of-Service OLTP Original Licensed Thermal Power (100% OLTP, 3293 MWt)

Pbypass Power, below which TSV Position and TCV Fast Closure Scrams are bypassed PLU Power Load Unbalance PLUOOS PLU OOS PSP Power Setpoint RBM Rod Block Monitor RPT Recirculation Pump Trip RPTOOS RPT OOS SDM Shutdown Margin SLMCPR MCPR Safety Limit SLO Single Loop Operation SRV Safety Relief Valve SRVOOS SRV OOS TBV Turbine Bypass Valve TBVIS Turbine Bypass Valves IS TBVOOS Turbine Bypass Valves OOS TCV Turbine Control Valve TIP Transverse In-Core Probe TIPOOS TIP OOS TLO Two Loop Operation TSP Trip Setpoint TSSS Technical Specification Scram Speed TSV Turbine Stop Valve TVA Tennessee Valley Authority BFE-2786, Revision 0 (Final)

EDMS: 090330 800 L32 090330 EDMS: L32 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 8 References

1. ANP-2799, Revision 0, Browns Ferry Unit 2 Cycle 16 Reload Analysis, AREVA NP, Inc., March 2009.
2. EMF-3114(P), Revision 0, Mechanical Design Report for Browns Ferry Unit 2 Batches BFE2-14 ATRIUM-10 Fuel Assemblies, Framatome ANP, Inc.,

September 2004.

3. ANP-2537(P) Revision 0, Mechanical Design Report for Browns Ferry Unit 2 Reload BFE2-15 ATRIUM-10 Fuel Assemblies, AREVA NP, Inc., May 2006.
4. ANP-2755(P) Revision 0, Mechanical Design Report for Browns Ferry Unit 2 Reload BFE2-16 ATRIUM TM-10 Fuel Assemblies, AREVA NP, Inc., November 2008.
5. ANP-2753(P) Revision 1, Browns Ferry Unit 2 Cycle 16 Plant Parameters Document (105% OLTP), AREVA NP, Inc., December 2008.

Methodology References

6. XN-NF-81-58(P)(A) Revision 2 and Supplements 1 and 2, RODEX2 Fuel Rod Thermal-Mechanical Response Evaluation Model, Exxon Nuclear Company, March 1984.
7. XN-NF-85-67(P)(A) Revision 1, Generic Mechanical Design for Exxon Nuclear Jet Pump BWR Reload Fuel, Exxon Nuclear Company, September 1986.
8. EMF-85-74(P) Revision 0 Supplement 1(P)(A) and Supplement 2(P)(A), RODEX2A (BWR) Fuel Rod Thermal-Mechanical Evaluation Model, Siemens Power Corporation, February 1998.
9. ANF-89-98(P)(A) Revision 1 and Supplement 1, Generic Mechanical Design Criteria for BWR Fuel Designs, Advanced Nuclear Fuels Corporation, May 1995.
10. XN-NF-80-19(P)(A) Volume 1 and Supplements 1 and 2, Exxon Nuclear Methodology for Boiling Water Reactors - Neutronic Methods for Design and Analysis, Exxon Nuclear Company, March 1983.
11. XN-NF-80-19(P)(A) Volume 4 Revision 1, Exxon Nuclear Methodology for Boiling Water Reactors: Application of the ENC Methodology to BWR Reloads, Exxon Nuclear Company, June 1986.
12. EMF-2158(P)(A) Revision 0, Siemens Power Corporation Methodology for Boiling Water Reactors: Evaluation and Validation of CASMO-4/MICROBURN-B2, Siemens Power Corporation, October 1999.

BFE-2786, Revision 0 (Final)

EDMS: 090330 800 EDMS: L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cycle 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 9

13. XN-NF-80-19(P)(A) Volume 3 Revision 2, Exxon Nuclear Methodology for Boiling Water Reactors, THERMEX: Thermal Limits Methodology Summary Description, Exxon Nuclear Company, January 1987.
14. XN-NF-84-105(P)(A) Volume 1 and Volume 1 Supplements 1 and 2, XCOBRA-T: A Computer Code for BWR Transient Thermal-Hydraulic Core Analysis, Exxon Nuclear Company, February 1987.
15. ANF-524(P)(A) Revision 2 and Supplements 1 and 2, ANF Critical Power Methodology for Boiling Water Reactors, Advanced Nuclear Fuels Corporation, November 1990.
16. ANF-913(P)(A) Volume 1 Revision 1 and Volume 1 Supplements 2, 3 and 4, COTRANSA2: A Computer Program for Boiling Water Reactor Transient Analyses, Advanced Nuclear Fuels Corporation, August 1990.
17. ANF-1358(P)(A) Revision 1, The Loss of Feedwater Heating Transient in Boiling Water Reactors, Advanced Nuclear Fuels Corporation, September 1992.
18. EMF-2209(P)(A) Revision 2, SPCB Critical Power Correlation, Siemens Power Corporation, September 2003.
19. EMF-2361(P)(A) Revision 0, EXEM BWR-2000 ECCS Evaluation Model, Framatome ANP Inc., May 2001.
20. EMF-2292(P)(A) Revision 0, ATRIUM TM-10: Appendix K Spray Heat Transfer Coefficients, Siemens Power Corporation, September 2000.

PRNM Setpoint References

21. Filtered Setpoints - EDE-28-0990 Rev. 3 Supplement E, "PRNM (APRM, RBM, and RFM) Setpoint Calculations [ARTS/MELLL (NUMAC) - Power-Uprate Condition] for Tennessee Valley Authority Browns Ferry Nuclear Plant", October 1997
22. Unfiltered Setpoints - EDE-28-0990 Rev. 2 Supplement E, "PRNM (APRM, RBM, and RFM) Setpoint Calculations [ARTS/MELLL (NUMAC) - Power-Uprate Condition]

for Tennessee Valley Authority Browns Ferry Nuclear Plant", October 1997.

23. GE Letter LB#: 262-97-133, Browns Ferry Nuclear Plant Rod Block Monitor Setpoint Clarification- GE ProprietaryInformation, September 12, 1997
24. NEDC-32433P, Maximum Extended Load Line Limit and ARTS Improvement Program Analyses for Browns Ferry Nuclear Plant Unit 1, 2, and 3, GE Nuclear Energy, April 1995 BFE-2786, Revision 0 (Final)

EDMS: L32 090330 800 L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cycle 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 10 1 Introduction In anticipation of cycle startup, it is necessary to describe the expected limits of operation.

1.1 Purpose The primary purpose of this document is to satisfy requirements identified by unit technical specification section 5.6.5. This document may be provided, upon final approval, to the NRC.

1.2 Scope This document will discuss the following areas:

> Average Planar Linear Heat Generation Rate (APLHGR) Limit (Technical Specifications 3.2.1 and 3.7.5)

> Linear Heat Generation Rate (LHGR) Limit (Technical Specification 3.2.3, 3.3.4.1, and 3.7.5)

> Minimum Critical Power Ratio Operating Limit (OLMCPR)

(Technical Specifications 3.2.2, 3.3.4.1, and 3.7.5)

> Average Power Range Monitor (APRM) Flow Biased Rod Block Trip Setting (Technical Requirements Manual Section 5.3.1 and Table 3.3.4-1)

> Rod Block Monitor (RBM) Trip Setpoints and Operability (Technical Specification Table 3.3.2.1-1)

> Shutdown Margin (SDM) Limit (Technical Specification 3.1.1) 1.3 Fuel Loading The core will contain all AREVA NP, Inc., ATRIUM TM-10 fuel. Nuclear fuel types used in the core loading are shown in Table 1.1.

1.4 Acceptability Limits discussed in this document were generated based on NRC approved methodologies per References 6 thru 20.

EDMS L3 09030 00 BE-286, eviion (Fnal EDMS: L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 11 Table 1.1 Nuclear Fuel Types Nuclear Original Number of Fuel Type Fuel Names Fuel Description Cycle Assemblies (NFT) (Range)

ATRIUM-10 A10-3920B-14GV70 14 107 1 FBA001-FBA279 ATRIUM-10 A10-4227B-15GV80-FBB 15 206 2 FBB001-FBB206 ATRIUM-10 A10-4239B-15GV80-FBB 15 111 3 FBB207-FBB318 ATRIUM-10 A10-3552B-10GV80-FBB 15 56 4 FBB319-FBB374 ATRIUM-10 A10-4218B-13GV80-FCC 16 16 6 FCC291-FCC306 ATRIUM-10 A10-3757B-10GV80-FCC 16 24 7 FCC31 1-FCC334 ATRIUM-10 A10-4019B-14GV80-FBC 16 168 8 FBC401 -FBC568 ATRIUM-10 A10-3841B-14GV80-FBC 16 76 9 FBC569-FBC644 The table identifies the expected fuel type breakdown inanticipation of final core loading. The final composition of the core depends upon uncertainties during the outage such as discovering a failed fuel bundle, or other bundle damage. Minor core loading changes, due to unforeseen events, will conform to the safety and monitoring requirements identified in this document.

EDIVIS: L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cycle 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 12 2 APLHGR Limits (Technical Specifications 3.2.1 & 3.7.5)

The APLHGR limit is determined by adjusting the rated power APLHGR limit for off-rated power, off-rated flow, and SLO conditions. The most limiting of these is then used as follows:

APLHGR limit = MIN (APLHGRp, APLHGRF, APLHGRsLo) where:

APLHGRp off-rated power APLHGR limit [APLHGRRATED

  • MAPFACp]

APLHGRF off-rated flow APLHGR limit [APLHGRRATED

  • MAPFACF]

APLHGRsLo SLO APLHGR limit [APLHGRRATED

  • SLO Multiplier]

2.1 Rated Power and Flow Limit: APLHGRRATED The rated conditions APLHGR, for all fuel types, is identified in Reference 1 and shown in Figure 2.1.

2.2 Off-Rated Power Dependent Limit: APLHGRp Reference 1, for ATRIUM-1 0 fuel, does not specify a power dependent APLHGR. Therefore, MAPFACp is set to a value of 1.0.

2.3 Off-Rated Flow Dependent Limit: APLHGRF Reference 1, for ATRIUM-10 fuel, does not specify a flow dependent APLHGR. Therefore, MAPFACF is set to a value of 1.0.

2.4 Single Loop Operation Limit: APLHGRSLO The single loop operation multiplier for ATRIUM-10 fuel is 0.85, per Reference 1.

BFE-2786, Revision 0 (Final)

EDMS: L32 090330 800 L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 13 15 12 9

0.

6 3

0 0.0 20.0 40.0 60.0 80.0 Planar Average Exposure (GWd/MTU)

Planar Avg. APLHGR Exposure Limit (GWd/MTU) (kW/ft) 0.0 12.5 15.0 12.5 67.0 7.3 Figure 2.1 APLHGRRATED for ATRIUM-10 Fuel 800 090330 800 L32 090330 BFE-2786, Revision 0 (Final)

EIJMS:

EDMS: L32 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cycle 16 TVA-COLR-BF2C16 Core Operating ULmits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 14 2.5 Equipment Out-Of-Service Corrections The limit shown in Figure 2.1 is applicable for operation with all equipment In-Service as well as the following Equipment Out-Of-Service (EOOS) options; including combinations of the options.

In-Service All equipment In-Service (includes 1 SRVOOS)

RPTOOS EOC-Recirculation Pump Trip Out-Of-Service TBVOOS Turbine Bypass Valve(s) Out-Of-Service PLUOOS Power Load Unbalance Out-Of-Service FHOOS Feedwater Heaters Out-Of-Service Single Recirculation Loop Operation (SLO) requires the application of the SLO multipliers to the rated APLHGR limits as described previously.

800 090330 800 L32 090330 EDMS: L32 BFE-2786, Revision 0 (Final)

EDMS: BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cycle 16 TVA-COLR-BF2C16 Core Operating Limits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 15 3 LHGR Limits (Technical Specification 3.2.3, 3.3.4.1, & 3.7.5)

The LHGR limit is determined by adjusting the rated power LHGR limit for off-rated power and off-rated flow conditions. The most limiting of these is then used as follows:

LHGR limit = MIN ( LHGRp , LHGRF) where:

LHGRp off-rated power LHGR limit [LHGRRATED

  • LHGRFACp]

LHGRF off-rated flow LHGR limit [LHGRRATED* LHGRFACF]

3.1 Rated Power and Flow Limit: LHGRRATED The rated conditions LHGR, for all fuel types, is identified in Reference 1 and shown in Figure 3.1. The LHGR limit is consistent with References 2, 3, & 4.

3.2 Off-Rated Power Dependent Limit: LHGRp The ATRIUM-10 fuel, LHGR limits are adjusted for off-rated power conditions using the LHGRFACp multiplier provided in Reference 1. The multiplier is split into two sub cases:

turbine bypass valves in and out-of-service. The multipliers are shown in Figure 3.2.

3.3 Off-Rated Flow Dependent Limit: LHGRF The ATRIUM-10 fuel, LHGR limits are adjusted for off-rated flow conditions using the LHGRFACF multiplier provided in Reference 1. The multiplier is shown in Figure 3.3.

3.4 Equipment Out-Of-Service Corrections The limit shown in Figure 3.1 is applicable for operation with all equipment In-Service as well as the following Equipment Out-Of-Service (EOOS) options; including combinations of the options.*

In-Service All equipment In-Service RPTOOS EOC-Recirculation Pump Trip Out-Of-Service TBVOOS Turbine Bypass Valve(s) Out-Of-Service PLUOOS Power Load Unbalance Out-Of-Service FHOOS Feedwater Heaters Out-Of-Service SLO Single Loop Operation, One Recirculation Pump Out-Of-Service The off-rated power corrections shown in Figure 3.2 are dependent on operation of the Turbine Bypass Valve system. For this reason, separate limits are to be applied for TBVIS or TBVOOS operation. The limits have no dependency on RPTOOS, PLUOOS, FHOOS/FFWTR, or SLO.

. All equipment service conditions assume 1 SRVOOS.

EDMS: L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cycle 16 TVA-COLR-BF2C16 Core Operating Limits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 16 15 12 9

0

=

-J 6 3

0 0.0 20.0 40.0 60.0 80.0 Pellet Exposure (GWd/MTU)

Pellet LHGR Exposure Limit 0.01 13.4 18.91 13.4 Figure 3.1 LHGRRATED for ATRIUM-10 Fuel 800 BFE-2786, Revision 0 (Final)

EDMS: L32 090330 800 L32 090330 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cycle 16 TVA-COLR-BF2C16 Core Operating Limits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 17 1.10 1.00 0.90 Turbine Bypass Valve In-Service, TBVIS 0.80 C.)

Turbine Bypass Valve Out-of-Service. TBVOOS 0.70

.-J 0.60

. TBVIS, <= 50% Core Flow TBVOOS, <= 50% Core Flow TBVIS, > 50% Core Flow 0.50 TBVOOS, > 50% Core Flow 0A0 0.30 20 30 40 50 60 70 80 90 100 110 Core Flow (% Rated)

Turbine Bypass In-Service Turbine Bypass Out-of-Service Core Core Power LHGRFACp Power LHGRFACp 100.0 1.00 100.0 0.88 30.0 0.63 30.0 0.63 Core Flow > 50% Rated Core Flow > 50% Rated 30.0 _F 0.52 30.0 0.43 25.0 0.48 25.0 0.39 Core Flow <= 50% Rated Core Flow <= 50% Rated 30.0 0.57 30.0 0.53 25.0 0.55 25.0 0.47 Figure 3.2 LHGRFACp for ATRIUM-10 Fuel (Independent of other EOOS conditions) 800 090330 800 L32 090330 BFE-2786, Revision 0 (Final)

EDMS: L32 EDMS: BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operating Limits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 18 1.10 1.05 1.00 U.

W 0.95 0.90 0.85 0.80 30 40 50 60 70 80 90 100 110 Core Flow (% Rated)

Core Flow LHGRFACF

% Rated) 30.0 0.89 54.0 1 107.0 1 Figure 3.3 LHGRFACF for ATRIUM-10 Fuel (Values bound all EOOS conditions)

(107.0% maximum core flow line is used to support 105% rated flow operation,ICF)

BFE-2786, Revision 0 (Final)

EDMS: 090330 800 L32 090330 EDMS: L32 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operating ULmits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 19 4 OLMCPR Limits (Technical Specification 3.2.2, 3.3.4.1, & 3.7.5)

OLMCPR is calculated to be the most limiting of the flow or power dependent values OLMCPR limit = MAX ( MCPRF, MCPRp) where:

MCPRF core flow-dependent MCPR limit MCPRp power-dependent MCPR limit 4.1 Flow Dependent MCPR Limit: MCPRF MCPRF limits are dependent upon core flow (% of Rated), and the max core flow limit, (Rated or Increased Core Flow, ICF). MCPRF limits are shown in Figure 4.1, per Reference 1. Limits are valid for all EOOS combinations. No adjustment is required for SLO conditions.

4.2 Power Dependent MCPR Limit: MCPRp MCPRp limits are dependent upon:

" Core Power Level (% of Rated)

" Technical Specification Scram Speed (TSSS) or Nominal Scram Speed (NSS)

" Cycle Operating Exposure (NEOC & EOC - as defined in this section)

" Equipment Out-Of-Service Options

" Two or Single recirculation Loop Operation (TLO vs. SLO)

The MCPRp limits are provided in the following tables, where each table contains the limits for all fuel types and EOOS options (for a specified scram speed and exposure range). The CMSS determines MCPRp limits, from these tables, based on linear interpolation between the specified powers.

4.2.1 Scram Speed Dependent Limits (TSSS vs. NSS)

MCPRp limits are provided for two different sets of assumed scram speeds. The Technical Specification Scram Speed (TSSS) MCPRp limits are applicable at all times, as long as the scram time surveillance demonstrates the times in Technical Specification Table 3.1.4-1 are met. Nominal Scram Speeds (NSS) may be used, as long as the scram time surveillance demonstrates Table 4.1 times are applicable.*t Reference 1 analysis results are based on information identified inReference 5.

t Assumption basis is consistent with method used to perform actual timing measurements, (i.e., including pickup/dropout effects).

EDIVIS: L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operatinq Limits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 20 2.00 1.80 1.60 LL 0.

1.40 1.20 1.00 30 40 50 60 70 80 90 100 110 Core Flow (% Rated)

Core Flow MCPRF

(%Rated) 30.0 1.61 78.0 1.28 107.0 1.28 Figure 4.1 MCPRF for ATRIUM-10 Fuel (Values bound all EOOS conditions)

(107.0% maximum core flow line is used to support 105% ratedflow operation,ICF)

BFE-2786, Revision 0 (Final)

EDMS: L32 090330 800 L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operating Limits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 21 Table 4.1 Nominal Scram Time Basis Notch Nominal Position Scram Timing (index) (se~conds) 46 0.42 36 0.98 26 1.60 6 2.90 In demonstrating compliance with nominal scram time basis, surveillance requirements from Technical Specification 3.1.4 apply; accepting the definition of SLOW rods should conform to scram speeds shown in Table 4.1. If conformance is not demonstrated, TSSS based MCPRp limits are applied.

On initial cycle startup, TSSS limits are used until the successful completion of scram timing confirms NSS based limits are applicable.

4.2.2 Exposure Dependent Limits Exposures are tracked on a Core Average Exposure basis (CAVEX, not Cycle Exposure).

Higher exposure MCPRp limits are always more limiting and may be used for any Core Average Exposure up to the ending exposure. Per Reference 1, MCPRp limits are provided for the following exposure ranges:

BOC to NEOC NEOC corresponds to 28,344 MWd / MTU BOC to EOC EOC corresponds to 31,102 MWd / MTU NEOC refers to a Near EOC exposure point.

The EOC exposure point is not the true End-Of-Cycle exposure. Instead it corresponds to a licensing exposure window exceeding expected end-of-full-power-life.

BFE-2786, Revision 0 (Final)

EDMS: L32 090330 800 L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 22 4.2.3 Equipment Out-Of-Service (EOOS) Options EOOS options* covered by MCPRp limits are given by the following:

In-Service All equipment In-Service RPTOOS EOC-Recirculation Pump Trip Out-Of-Service TBVOOS Turbine Bypass Valve(s) Out-Of-Service RPTOOS+TBVOOS Combined RPTOOS and TBVOOS PLUOOS Power Load Unbalance Out-Of-Service PLUOOS+RPTOOS Combined PLUOOS and RPTOOS PLUOOS+TBVOOS Combined PLUOOS and TBVOOS PLUOOS+TBVOOS+RPTOOS Combined PLUOOS, RPTOOS, and TBVOOS FHOOS Feedwater Heaters Out-Of-Service For exposure ranges up to NEOC and EOC, additional combinations of MCPRp limits are also provided including FHOOS.

4.2.4 SinQgle-Loop-Operation (SLO) Limits MCPRp limits are increased by 0.02 to support SLO, per Reference 1.

4.2.5 Below PbypIass Limits Below Pbypass (30% rated power), MCPRp limits depend upon core flow. One set of MCPRp limits applies for core flow is above 50% of rated; a second set applies if the core flow is less than or equal to 50% rated.

All equipment service conditions assume 1SRVOOS.

EDMS: 090330 800 L32 090330 BFE-2786, Revision 0 (Final)

EDMS: L32 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cycle 16 TVA-COLR-BF2C16 Core Operaling Limits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 23 Table 4.2 MCPRp Limits for Nominal Scram Time Basis*

BOC BOC BOC BOC Power to to Power to to Operati Operating Condition (% of rated) NEOC EOC Condition I (% of rated) NEOC EOC 100 1.41 1.42 100 1.41 1.42 75 1.54 1.54 75 1.54 1.54 65 1.60 1.60 65 1.82 1.82 60 1.64 1.64 60 1.84 1.84 50 1.76 1.76 50 ---

Base Case 50 1.91 1.91 PLUOOS 50 1.91 1.91 30 2.18 2.18 30 2.18 2.18 30 at> 50%F 2.67 2.67 30 at> 50%F 2.67 2.67 25 at> 50%F 2.93 2.93 25 at> 50%F 2.93 2.93 30 at <= 50%F 2.54 2.54 30 at <= 50%F 2.54 2.54 25 at <= 50%F 2.75 2.75 25 at <= 50%F 2.75 2.75 100 1.45 1.47 100 1.45 1.47 75 1.58 1.58 75 1.58 1.58 65 1.64 1.64 65 1.64 1.64 60 1.67 1.67 60 1.67 1.67 50 1.79 1.79 50 1.79 1.79 TBVOOS 50 1.91 1.91 TOOS TBVOOS 50 1.91 1.91 30 2.21 2.21 30 2.21 2.21 30 at> 50%F 3.21 3.21 30 at> 50%F 3.21 3.21 25 at> 50%F 3.63 3.63 25 at> 50%F 3.63 3.63 30 at < 50%F 2.74 2.74 30 at <= 50%F 2.74 2.74 25at <= 50%F 3.12 3.12 25at < 50%F 3.12 3.12 M

100 1.41 1.42 100 1.44 1.44 75 1.54 1.54 75 1.58 1.58 65 1.60 1.60 65 1.65 1.65 60 1.64 1.64 60 1.70 1.70 50 1.76 1.76 RPTOOS 50 1.83 1.83 RPTOOS 50 1.91 1.91 EHOOS 50 1.91 1.91 30 2.18 2.18 30 2.29 2.29 30 at> 50%F 2.67 2.67 30 at> 50%F 2.77 2.77 25 at> 50%F 2.93 2.93 25 at> 50%F 3.06 3.06 30 at <= 50%F 2.54 2.54 30 at <= 50%F 2.63 2.63 25 at <= 50%F 2.75 2.75 25 at <= 50%F 2.87 2.87 100 1.44 1.44 100 1.41 1.42 75 1.58 1.58 75 1.54 1.54 65 1.65 1.65 65 1.82 1.82 60 1.70 1.70 60 1.84 1.84 50 1.83 1.83 RPTOOS 50 ---

FHOOS 50 1.91 1.91 PLUOOS5 50 1.91 1.91 30 2.29 2.29 30 2.18 2.18 30 at> 50%F 2.77 2.77 30 at> 50%F 2.67 2.67 25 at> 50%F 3.06 3.06 25 at> 50%F 2.93 2.93 30 at <= 50%F 2.63 2.63 30 at <= 50%F 2.54 2.54 25 at <= 50%F 2.87 2.87 25 at <= 50%F 2.75 2.75 The term "Base Case" can be thought of as an all equipment in-service condition. All limits, including the "Base Case," support operation with any combination of 1 MSRVOOS, up to 2 TIPOOS (or the equivalent number of TIP channels), and up to 50% of the LPRMs out-of-service. For single-loop operation, MCPRp limits will be 0.02 higher.

A 50% power step change for PLUOOS limits is not supported. When core power is < 50%, the LRNB event is the same with, or without PLUOOS.

EDIVIS: L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 24 Table 4.2 MCPRp Limits for Nominal Scram Time Basis (continued)*

BOC BOC BOC BOC Power to to Power to to Operating Operating Condition (% of rated) NEOC EOC Condition (% of rated) NEOC EOC 100 1.47 1.48 100 1.45 1.47 75 1.62 1.62 75 1.58 1.58 65 1.68 1.68 65 1.82 1.82 60 1.73 1.73 60 1.84 1.84 50 1.86 1.86 RPTOOS 50 TBVOOS 50 1.91 1.91 TBVOOS 50 1.91 1.91 FHOOS 30 2.32 2.32 PLUOOS 30 2.21 2.21 30 at> 50%F 3.33 3.33 30 at> 50%F 3.21 3.21 25 at> 50%F 3.77 3.77 25 at> 50%F 3.63 3.63 30 at <= 50%F 2.86 2.86 30at <= 50%F 2.74 2.74 25 at <= 50%F 3.28 3.28 25 at <= 50%F 3.12 3.12 100 1.45 1.47 100 1.44 1.44 75 1.58 1.58 75 1.58 1.58 65 1.82 1.82 65 1.82 1.82 60 1.84 1.84 60 1.84 1.84 50 .. RPTOOS 50 TBVOOS 50 1.91 1.91 FHOOS 50 1.91 1.91 PLUOOS 30 2.21 2.21 PLUOOS 30 2.29 2.29 30 at> 50%F 3.21 3.21 30 at> 50%F 2.77 2.77 25 at> 50%F 3.63 3.63 25 at> 50%F 3.06 3.06 30 at -= 50%F 2.74 2.74 30 at <= 50%F 2.63 2.63 25 at <= 50%F 3.12 3.12 25 at <= 50%F 2.87 2.87 M

100 1.44 1.44 100 1.47 1.48 75 1.58 1.58 75 1.62 1.62 65 1.82 1.82 65 1.82 1.82 60 1.84 1.84 60 1.84 1.84 50 .. TBVOOS 50 FHOOS 50 1.91 1.91 FHOOS 50 1.91 1.91 PLUOOS 30 2.29 2.29 PLUOOS 30 2.32 2.32 30 at> 50%F 2.77 2.77 30 at> 50%F 3.33 3.33 25 at> 50%F 3.06 3.06 25 at> 50%F 3.77 3.77 30 at <- 50%F 2.63 2.63 30 at <= 50%F 2.86 2.86 25 at <= 50%F 2.87 2.87 25 at <= 50%F 3.28 328 4 4 100 1.47 1.48 100 1.47 1.48 75 1.62 1.62 75 1.62 1.62 65 1.68 1.68 65 1.82 1.82 60 1.73 1.73 60 1.84 1.84 RPTOOS 50 1.86 1.86 RPTOOS TBVOOS 50 1.91 TBVOOS 50 1.91 50 1.91 1.91 FHOOS FHOOS 30 2.32 2.32 PLUOOS 30 2.32 2.32 30 at> 50%F 3.33 3.33 30 at> 50%F 3.33 3.33 25 at> 50%F 3.77 3.77 25 at> 50%F 3.77 3.77 30 at <= 50%F 2.86 2.86 30 at <= 50%F 2.86 2.86 25 at < 50%F 3.28 3.28 25 at <= 50%F 3.28 3.28 The term "Base Case" can be thought of as an all equipment in-service condition. All limits, including the "Base Case," support operation with any combination of 1 MSRVOOS, up to 2 TIPOOS (or the equivalent number of TIP channels), and up to 50% of the LPRMs out-of-service. For single-loop operation, MCPRP limits will be 0.02 higher.

A 50% power step change for PLUOOS limits is not supported. When core power is - 50%, the LRNB event is the same with, or without PLUOOS.

EDMS: L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operating ULmits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 25 Table 4.3 MCPRp Limits for Technical Specification Scram Time Basis BOC BOC BOC BOC Power to to Power to to Operating Operating Condition (% of rated) NEOC EOC Condition (% of rated) NEOC EOC 100 1.43 1.44 100 1.43 1.44 75 1.56 1.56 75 1.56 1.56 65 1.62 1.62 65 1.83 1.83 60 1.66 1.66 60 1.85 1.85 50 1.77 1.77 50 ---

Base Case 50 1.92 1.92 PLUOOS 50 1.92 1.92 30 2.20 2.20 30 2.20 2.20 30 at> 50%F 2.67 2.67 30 at> 50%F 2.67 2.67 25 at> 50%F 2.93 2.93 25 at> 50%F 2.93 2.93 30 at <= 50%F 2.54 2.54 30 at <= 50%F 2.54 2.54 25 at <= 50%F 2.75 2.75 25 at <= 50%F 2.75 2.75 100 1.47 1.48 100 1.47 1.48 75 1.62 1.62 75 1.62 1.62 65 1.66 1.66 65 1.66 1.66 60 1.70 1.70 60 1.70 1.70 50 1.81 1.81 RPTOOS 50 1.81 1.81 TBVOOS 50 1.92 1.92 TBVOOS 50 1.92 1.92 30 2.23 2.23 30 2.23 2.23 30 at> 50%F 3.21 3.21 30 at> 50%F 3.21 3.21 25 at> 50%F 3.63 3.63 25 at> 50%F 3.63 3.63 30 at <= 50%F 2.74 2.74 30 at <= 50%F 2.74 2.74 25 at = 50%F 3.12 3.12 25at <= 50%F 3.12 3.12 i M 100 1.43 1.44 100 1.46 1.46 75 1.56 1.56 75 1.59 1.59 65 1.62 1.62 65 1.67 1.67 60 1.66 1.66 60 1.72 1.72 50 1.77 1.77 RPTOOS 50 1.84 1.84 RPTOOS 50 1.92 1.92 EHOOS 50 1.92 1.92 30 2.20 2.20 30 2.30 2.30 30 at> 50%F 2.67 2.67 30 at> 50%F 2.77 2.77 25 at> 50%F 2.93 2.93 25 at> 50%F 3.06 3.06 30 at <= 50%F 2.54 2.54 30 at <= 50%F 2.63 2.63 25 at <= 50%F 2.75 2.75 25 at <= 50%F 2.87 2.87 100 1.46 1.46 100 1.43 1.44 75 1.59 1.59 75 1.56 1.56 65 1.67 1.67 65 1.83 1.83 60 1.72 1.72 60 1.85 1.85 50 1.84 1.84 RPTOOS 50 ---..

FHOOS 50 1.92 1.92 PLUOOS 50 1.92 1.92 30 2.30 2.30 30 2.20 2.20 30 at> 50%F 2.77 2.77 30 at> 50%F 2.67 2.67 25 at> 50%F 3.06 3.06 25 at> 50%F 2.93 2.93 30 at = 50%F 2.63 2.63 30 at <= 50%F 2.54 2.54 25 at <= 50%F 2.87 2.87 25 at <= 50%F 2.75 2.75 The term "Base Case" can be thought of as an all equipment in-service condition. All limits, including the "Base Case," support operation with any combination of 1 MSRVOOS, up to 2 TIPOOS (or the equivalent number of TIP channels), and up to 50% of the LPRMs out-of-service. For single-loop operation, MCPRp limits will be 0.02 higher.

A 50% power step change for PLUOOS limits is not supported. When core power is < 50%, the LRNB event is the same with, or without PLUOOS.

EDIVIS: L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cycle 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 26 Table 4.3 MCPRp Limits for Technical Specification Scram Time Basis (continued)*

BOC BOC BOC BOC to to Power to to Operating Power Operating Condition (% of rated) NEOC EOC Condition I (% of rated) NEOC EOC 100 1.50 1.50 100 1.47 1.48 75 1.63 1.63 75 1.62 1.62 65 1.70 1.70 65 1.83 1.83 60 1.75 1.75 60 1.85 1.85 50 1.88 1.88 RPTOOS 50 ---

TBOOS 50 1.92 1.92 TBVOOS 50 1.92 1.92 FHOOS 30 2.34 2.34 PLUOOS 30 2.23 223 30 at> 50%F 3.33 3.33 30 at> 50%F 3.21 3.21 25 at> 50%F 3.77 3.77 25 at> 50%F 3.63 3.63 30 at <= 50%F 2.86 2.86 30 at <= 50%F 2.74 2.74 25at < 50%F 3.28 3.28 25at <= 50%F 3.12 3.12 100 1.47 1.48 100 1.46 1.46 75 1.62 1.62 75 1.59 1.59 65 1.83 1.83 65 1.83 1.83 60 1.85 1.85 60 1.85 1.85 TBVOOS 50 --- RPTOOS 50 ---..

50 1.92 1.92 FHOOS 50 1.92 1.92 PLUOOS 30 2.23 2.23 PLUOOS 30 2.30 2.30 30 at> 50%F 3.21 3.21 30 at> 50%F 2.77 2.77 25 at> 50%F 3.63 3.63 25 at> 50%F 3.06 3.06 30 at <= 50%F 2.74 2.74 30 at < 50%F 2.63 2.63 25 at <= 50%F 3.12 3.12 25 at <= 50%F 2.87 2.87 100 1.46 1.46 100 1.50 1.50 75 1.59 1.59 75 1.63 1.63 65 1.83 1.83 65 1.83 1.83 60 1.85 1.85 60 1.85 1.85 FHOOS 50 ---. TBVOOS 50 ---..

50 1.92 1.92 FHOOS 50 1.92 1.92 PLUQOS 30 2.30 2.30 PLUOOS 30 2.34 2.34 30 at> 50%F 2.77 2.77 30 at> 50%F 3.33 3.33 25 at> 50%F 3.06 3.06 25 at> 50%F 3.77 3.77 30 at <= 50%F 2.63 2.63 30 at <= 50%F 2.86 2.86 25 at <= 50%F 2.87 2.87 25 at <= 50%F 3.28 3.28 100 1.50 1.50 100 1.50 1.50 75 1.63 1.63 75 1.63 1.63 65 1.70 1.70 65 1.83 1.83 60 1.75 1.75 60 1.85 1.85 RPTOOS 50 1.88 1.88 TOOS50 TBVOOS --

TBVOOS 50 1.92 1.92 FHOOS 50 1.92 1.92 FHOOS 30 2.34 2.34 PLUOOS 30 2.34 2.34 30 at> 50%F 3.33 3.33 30 at> 50%F 3.33 3.33 25 at> 50%F 3.77 3.77 25 at> 50%F 3.77 3.77 30 at <= 50%F 2.86 2.86 30 at <= 50%F 2.86 2.86 25 at <= 50%F 3.28 3.28 1 25 at <= 50%F 3.28 3.28 The term "Base Case" can be thought of as an all equipment in-service condition. All limits, including the "Base Case," support operation with any combination of 1 MSRVOOS, up to 2 TIPOOS (or the equivalent number of TIP channels), and up to 50% of the LPRMs out-of-service. For single-loop operation, MCPRp limits will be 0.02 higher.

A 50% power step change for PLU0OS limits is not supported. When core power is < 50%, the LRNB event is the same with, or without PLUOOS.

BFE-2786, Revision 0 (Final)

EIJMS: L32 090330 800 EDMVS: BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cycle 16 TVA-COLR-BF2C16 Core Operating Limits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 27 5 APRM Flow Biased Rod Block Trip Settings (Technical Requirements Manual Section 5.3.1 and Table 3.3.4-1)

The APRM rod block trip setting is based upon References 21 & 22, and is defined by the following:

SRB < (0.66(W-AW) + 61%) Allowable Value SRB < (0.66(W-AW) + 59%) Nominal Trip Setpoint (NTSP) where:

SRB = Rod Block setting in percent of rated thermal power (3458 MWt)

W = Loop recirculation flow rate in percent of rated AW = Difference between two-loop and single-loop effective recirculation flow at the same core flow (AW=0.0 for two-loop operation)

The APRM rod block trip setting is clamped at a maximum allowable value of 115%

(corresponding to a NTSP of 113%).

BFE-2786, Revision 0 (Final)

EDIVIS: L32 EDMS: 090330 800 L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cyde 16 TVA-COLR-BF2C16 Core Operating Limits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 28 6 Rod Block Monitor (RBM) Trip Setpoints and Operability (Technical Specification Table 3.3.2.1-1)

The RBM trip setpoints and applicable power ranges, based on References 21 & 22, are shown in Table 6.1. Setpoints are based on an HTSP, unfiltered analytical limit of 117%. Unfiltered setpoints are consistent with a nominal RBM filter setting of 0.0 seconds; filtered setpoints are consistent with a nominal RBM filter setting less than 0.5 seconds. A CRWE based OLMCPR of 1.39 is identified in Reference 1. Cycle specific CRWE analyses of OLMCPR are documented in Reference 1, superceding values reported in References 21, 22, and 24.

Table 6.1 Analytical RBM Trip Setpoints Allowable Nominal Trip RBM Value Setpoint Trip Setpoint (AV) (NTSP)

LPSP 27% 25%

IPSP 62% 60%

HPSP 82% 80%

LTSP - unfiltered 124.7% 123.0%

- filtered 123.5% 121.8%

ITSP - unfiltered 119.7% 118.0%

- filtered 118.7% 117.0%

HTSP - unfiltered 114.7% 113.0%

- filtered 113.7% 112.0%

DTSP 90% 92%

As a result of cycle specific CRWE analyses, RBM setpoints in Technical Specification Table 3.3.2.1-1 are applicable as shown in Table 6.2. Cycle specific analysis results show the SLMCPR remains protected for RBM inoperable conditions (i.e., unblocked) per Reference 1.

Table 6.2 RBM Setpoint Applicability Thermal Power Applicable Notes from

(% Rated) MCPRt Table 3.3.2.1 -1 Comment

> 27% and < 90% < 1.72 (a), (b), (f), (h) two loop operation

< 1.75 (a), (b), (f), (h) single loop operation

> 90% < 1.42 (g) two loop operationt

" Values are considered maximums. Using lower values, due to RBM system hardware/software limitations, is conservative, and acceptable.

t MCPR values shown correspond with, (support), SLMPCR values identified in Reference 1.

Greater than 90% rated power is not attainable insingle loop operation.

EDIVIS: L32 090330 800 BFE-2786, Revision 0 (Final)

Browns Ferry Unit 2 Cycle 16 TVA-COLR-BF2C16 Core Operating Umits Report, (COLR, for 105% OLTP) Revision 0 (Final), Page 29 7 Shutdown Margin Limit (Technical Specification 3.1.1)

Assuming the strongest OPERABLE control blade is fully withdrawn, and all other OPERABLE control blades are fully inserted, the core shall be sub-critical and meet the following minimum shutdown margin:

SDM > 0.38% dk/k 800 BFE-2786, Revision 0 (Final)

EDIVIS: 090330 800 EDMS: L32 090330 BFE-2786, Revision 0 (Final)

Retrieved from "https://kanterella.com/w/index.php?title=ML091680143&oldid=2562936"