Document: NUREG-0800
Document ID: 5c84a1c2-9405-4849-8c5f-415a0bb66a22
Document Type: srp
Title: in connection with reactor internals.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070337.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.5
CFR Part: 
CFR Title: 

Content:
mponent operability assurance, functional capability, and allowable design and service stress limits for ASME Class 1, 2, and components and component supports.3 components and component supports, and core support structures.124 The Code provides five categories of limits applicable to design and service loadings (design, level A, level B, level C, and level D). The Code rules provide for structural integrity of the pressure retaining boundary of a component and its supports, but specifically exclude the subject of component operability and do not directly address functional capability. The types of loadings to be taken into account in designing a component are specified in the Code, but rules specifying how the loadings, (which result from postulated events and plant and system operating conditions,) are to be combined, 3.9.3-21 DRAFT Rev. 2 - April 1996 and what stress level is appropriate for use with a particular loading combinations, are 125 not specified in the Code. It is the responsibility of the designer to include all this information in the Code required Design Specification of each component and support. C. POSITION Effective with the 1977 Edition, theThe Code provides design stress limits and four 126 sets of service stress limits for all classes of components, component supports, and core support structures. The availability of such design and service stress limits within the Code requires that the EMEB review and determine maximum acceptable design and 127 service stress limits which may be used with specified loads, or combinations thereof, for components and component supports of safety-related systems (refer to definition in 128 Table IIIII ) and core support structures. 129 This appendix provides guidance for dealing with thefor reviewers on the following subjects regarding ASME Class 1, 2, and 3 components and component supports, of safety-related systems and core support structures in the following areas:130 (1) Consideration of design loadings