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:
f the CRDM 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 previously accepted testing program, or a commitment is made to perform a testing program that 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 the internal pressure-containing portions and other portions of the CRDS, including the CRDM housing, the hydraulic control unit, the condensate supply system and scram discharge volume, and portions such as the cylinder, tube, piston, and collet assembly. Of particular interest are any new and unique features that have not been used in the past. Pressure-containing components are checked to ensure that they meet the design requirements of the codes and criteria that have been accepted and are identified in SRP Section 3.2.2. The review of the functional design of reactivity control systems, including CRDS, is performed as part of the review of SRP Section 4.6. The loading combinations for the various plant operating conditions are reviewed as part of the review of SRP Section 3.9.3; given these loading combinations, the stress limits of the appropriate code should not be exceeded, or the limits in SRP Section 3.9.3 should not be exceeded if limits are not specified in the listed design code. For BWR CRDS that include a scram discharge volume system, the reviewer verifies that the system piping design meets or exceeds the acceptable owner’s group classifications and criteria discussed in the enclosure to Generic Letter 86-01 to ensure that breaks and through wall cracks in the piping need not be