Document: NUREG-0800
Document ID: 6d9458c8-25fc-47c7-8406-acd4365b1d3c
Document Type: srp
Title: CONTROL ROD DRIVE SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1613/ML16133A472.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.4
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Organization responsible for the review of component performance and testing Secondary - None I. AREAS OF REVIEW The control rod drive system (CRDS) consists of the control rods and the related mechanical components which provide the means for mechanical movement. 10 CFR Part 50, “Domestic Licensing of Production and Utilization Facilities,” Appendix A, “General Design Criteria (GDC) for Nuclear Power Plants,” GDC 26, “Reactivity Control System Redundancy and Capability,” and GDC 27, “Combined Reactivity Control Systems Capability,” require that the CRDS provide one of the independent reactivity control systems. The rods and the control rod drive mechanisms (CRDMs) shall be capable of reliably controlling reactivity changes under conditions of normal operation, including anticipated operational occurrences, and under postulated accident conditions. A positive means for inserting the rods shall always be maintained to ensure appropriate margin for malfunction, such as stuck rods. Since the CRDS is important to safety and portions of the CRDS are often a part of the reactor coolant pressure boundary (RCPB), GDC 1, “Quality Standards and Records,” GDC 2, “Design Bases for Protection against Natural Phenomena,” GDC 14, “Reactor Coolant Pressure Boundary,” and 3.9.4-2 Revision 4 – March 2017 GDC 29, “Protection against Anticipated Operational Occurrences,” and 10 CFR 50.55a, “Codes and Standards,” require that the system be designed, fabricated, and tested to quality standards commensurate with the safety functions to be performed so as to assure an extremely high probability of accomplishing the safety functions in the event of anticipated operational occurrences, postulated accidents and natural phenomena such as earthquakes. Information in the areas noted below is provided in the applicant’s safety analysis report and is reviewed by the primary review branch in accordance with this Standard