Document: NUREG-0800
Document ID: 825fe003-d78e-433f-8e46-8e2cb989ac88
Document Type: srp
Title: FUNCTIONAL DESIGN OF CONTROL ROD DRIVE SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340589.pdf
Revision Date: 2023-06
Chapter: 4
Section ID: 4.6
CFR Part: 
CFR Title: 

Content:
at are essential for operation of the system. 4.6-4 4Rev 1 - July 1981 The review has determined the adequacy of the applicant's proposed design criteria, design basis and safety classification of the control rod drive system and the requirements for providing a safe shutdown during normal and accident conditions. The staff concludes that the design of the control rod drive system is acceptable and meets the requirements of the General Design Criteria 23, 25, 26, 27, 28, and 29. This conclusion is based on the following: 1. The applicant has met the requirements of General Design Criterion 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 (such as loss of electric power, instrumentation air, fire, radiation, extreme heat, pressure, cola, water, steam, etc.). 2. The applicant has met the requirements of-General Design Criterion 25 by assuring that no fuel design limits are exceeded for any single malfunction or rod withdrawal accident. 3. The applicant has met the requirement of General Design Criterion 26 by demonstrating the ability to control reactivity changes to assure 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 conditions. 4. The applicant has met the requirements of General Design Criterion 27 by demonstrating the ability to reliably control reactivity changes under accident conditions to assure that no fuel design limits are exceeded and the reactor can be maintained subcritical under cold conditions. 5. The applicant has met the requirements of General Design Criterion 28 by demonstrating the ability to reliably control the amount and rate of reactivity change to assure that no reactivity accident will damage the reactor coolant pressure boundary or disturb the core or the core's