Document: NUREG-0800
Document ID: c543c347-16c6-4d28-9086-792635d04c4a
Document Type: srp
Title: CONTROL ROD DRIVE SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340634.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.4
CFR Part: 
CFR Title: 

Content:
e control rod drives, is reviewed to permit an evaluation of the adequacy of the system to perform its mechanical function properly. 2. A review is performed of information pertaining to design codes, standards, specifications, and standard practices, as well as to General Design Criteria, regulatory guides, and branch positions that are applied in the design, fabrication, construction, and operation of the CRDS. The various criteria, described in general terms above, should be supplied along with the names of the apparatus to which they apply. Pressurized portions of the system which are a part of RCPB are reviewed to determine the extent to which-the applicant complies with the Class 1 requirements of Section III of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (hereafter "the Code"). Those portions which are not part of the RCPB are reviewed with other specified parts of Section III, or other sections of the Code. The MEB reviews the non-pres- surized portions of the control rod drive system to determine the accept-: ability of design margins for allowable values of stress, deformation, and fatigue used in the analyses. If an experimental testing program is used in lieu of analysis, the program is reviewed to determine whether it adequately covers the areas of concern in stress, deformation, and fatigue. 3. Information is reviewed which pertains to the applicable design loads and their appropriate combinations, to the corresponding design stress limits, and to the corresponding allowable deformations. The deformations are of interest in the present context only in those instances where a failure of movement could be postulated due to excessive deformation and such move- ment would be necessary for a safety-related function. If the applicant selects an experimental testing option in lieu of estab- lishing a set of stress and deformation allowables, a detailed description of the testing program must be provided for review. In