Document: NUREG-0800
Document ID: d2857477-655b-4e97-aa7c-3321de2d556e
Document Type: srp
Title: CONTROL ROD DRIVE SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190004.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.4
CFR Part: 
CFR Title: 

Content:
echanism (CRDM) portion of the CRDS. For hydraulic systems, the review covers the CRDM and also the hydraulic control unit, the condensate supply system, and the scram discharge volume. For both types of systems, the CRDM housing should be treated as part of the RCPB; the relevant mechanical engineering information is presented either in this SRP section or by reference to the sections on the RCPB. If other types of CRDS are proposed or if new features that are not specifically mentioned here are incorporated in CRDS of current types, the information supplied for the new systems or new features should be similar to the information described below. The specific areas of review are as follows: 1. The descriptive information, including design criteria, testing programs, drawings, and a summary of the method of operation of the 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 design codes, standards, specifications, and standard practices, as well as GDC, regulatory guides, and branch positions that apply to 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 the criteria apply. Pressurized portions of the system that 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 (Code). Those portions that are not part of the RCPB are reviewed for compliance with other specified parts of Section III, or other sections of the ASME Code. The non-pressurized portions of the CRDS are reviewed to determine the acceptability 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