Document: NUREG-0800
Document ID: a2d035da-992b-42e8-894f-787a019b437d
Document Type: srp
Title: NUCLEAR DESIGN
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070410.pdf
Revision Date: 2023-06
Chapter: 4
Section ID: 4.3
CFR Part: 
CFR Title: 

Content:
Reactor Power Oscillations."; DRAFT Rev. 3 - April 1996 4.3-18 4. 10 CFR Part 50, Appendix A, General Design Criterion 13, "Instrumentation and Control."; 5. 10 CFR Part 50, Appendix A, General Design Criterion 20, "Protection System Functions."; 6. 10 CFR Part 50, Appendix A, General Design Criterion 25, "Protection System Requirements for Reactivity Control Malfunctions."; 7. 10 CFR Part 50, Appendix A, General Design Criterion 26, "Reactivity Control System Redundancy and Capability."; 8. 10 CFR Part 50, Appendix A, General Design Criterion 27, "Combined Reactivity Control Systems Capability."; 9. 10 CFR Part 50, Appendix A, General Design Criterion 28, "Reactivity Limits." 10. Regulatory Guide 1.77, "Assumptions Used for Evaluating a Control Rod Ejection Accident for Pressurized Water Reactors."42 113. R. 0. MeyerNUREG-0085 , "The Analysis of Fuel Densification," NUREG-0085, July 43 1976. 122. Branch Technical Position CPB 4.3-1, "Westinghouse Constant Axial Offset Control," July 1975, attached to SRP Section 4.3. 134. M. K. Drake, ed., "Data Formats and Procedures for the ENDF Neutron Cross Section Library," BNL-50274 (ENDF-102), National Neutron Cross Section Center, Brookhaven National Laboratory (1970). 4.3-19 DRAFT Rev. 3 - April 1996 BRANCH TECHNICAL POSITION CPB 4.3-1 (Currently the responsibility of Reactor Systems Branch (SRXB))44 WESTINGHOUSE CONSTANT AXIAL OFFSET CONTROL (CAOC) A. BACKGROUND In connection with the staff review of WCAP-8185 (17x17), we reviewed and accepted a scheme developed by Westinghouse for operating reactors that assures that throughout the core cycle including during the most limiting power maneuvers the total peaking factor, F , will not Q exceed the value consistent with the LOCA or other limiting accident analysis. This operating scheme, called constant axial offset control (CAOC), involves maintaining the axial flux difference within a narrow tolerance band around a burnup-dependent target in an attempt to minimize the