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:
for other plants of 'This list can be extended by a staff review and acceptance of other ANSI and MSS standards in the piping system area. 3.9.4-4 Rev. 2 - April 1984 similar design having a period of successful operation. Justifica- tion of any decreases should be provided. 3. For the various design and service conditions defined in NB-3113 of Section III of the ASME Code (Ref. 7), load combination sets are as given in Standard Review Plan Section 3.9.3 (Ref. 12). The stress limits applicable to pressurized and nonpressurized portions of the control rod drive systems should be as given in Reference 12 for the response to each loading set. The CRDS design should adequately consider water hammer loads to assure that system safety functions can be achieved. 4. The operability assurance program will be acceptable provided the observed performance as to wear, functioning times, latching, and overcoming a stuck rod meet system design requirements. III. REVIEW PROCEDURES The reviewer will select and emphasize material from the procedures described below as may be appropriate for a particular case. 1. The objectives of the review are to determine that design, fabrication, and construction of the control rod drive mechanisms provide structural adequacy and that suitable life cycle testing programs have been utilized to prove operability under service conditions. In the construction permit (CP) review, it should be determined that the design criteria utilize proper load combinations, stress and deformation limits, and that operability assurance is provided by reference to a pre- viously accepted testing program or that a commitment is made to perform a testing program which includes the essential elements listed below. In the operating license (OL) review, the results of any testing program not previously reviewed should be evaluated. 2. The design criteria presented should be evaluated for both the internal pressure-containing portions and other portions of the CRDS. These