Document: NUREG-0800
Document ID: 67e3fd64-e6a4-4522-b90f-4184c2f5b357
Document Type: srp
Title: FUNCTIONAL DESIGN OF CONTROL ROD DRIVE SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070540139.pdf
Revision Date: 2023-06
Chapter: 4
Section ID: 4.6
CFR Part: 
CFR Title: 

Content:
tain safe shutdown. The scope of review included process flow diagrams, layout drawings, piping and instrumentation diagrams, and descriptive information for the systems and for the supporting systems essential for operation of the system. 4.6-11 Revision 2 - March 2007 The review has determined the adequacy of the applicant’s proposed design criteria, design basis, and safety classification of the CRDS and the requirements for providing a safe shutdown during normal operation, anticipated operational occurrences, and accident conditions, including single failures. The staff concludes that the design of the CRDS is acceptable and meets the requirements of General Design Criteria (GDC) 4, 23, 25, 26, 27, 28, and 29 and 10 CFR 50.62(c)(3). This conclusion is based on the following: 1. The applicant has met the requirements of GDC 4 with respect to the design of the system against the adverse effects of missile hazards inside the containment, pipe whipping and jets caused by broken pipes, and adverse environmental conditions resulting from high- and moderate-energy pipe breaks during normal plant operations, anticipated operational occurrences, and accident conditions. 2. The applicant has met the requirements of GDC 23 by demonstrating the ability to insert the control rods upon any failure of the drive mechanism or any induced failure by an outside force (e.g., loss of electric power, instrumentation air, fire, radiation, extreme heat, pressure, cold, water, steam). 3. The applicant has met the requirements of GDC 25 by ensuring that no fuel design limits are exceeded for any single malfunction or rod withdrawal accident. 4. The applicant has met the requirement of GDC 26 by demonstrating the ability to control reactivity changes to ensure that, under normal operation and anticipated operational occurrences with the appropriate margin for malfunction (such as stuck rods), no fuel design limits are exceeded and the reactor can be maintained subcritical under cold