Document: NUREG-0800
Document ID: fb538e14-08a0-4d3f-a974-8170cbfe0b5b
Document Type: srp
Title: ASME CODE CLASS 1, 2, AND 3 COMPONENTS,
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340603.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.3
CFR Part: 
CFR Title: 

Content:
of corresponding design and service stress limits. b. The combination of design and service loadings, including procedures for combination, proposed by the applicant for each Code-constructed item are reviewed to determine if they are adequate. This aspect of the review is made by comparison with the loading combinations and procedures for combination set forth in Appendix A. Deviations from the position are evaluated on a case-by-case basis by questions addressed to the applicant to determine the rationale and justifica- tion for exceptions. Final determination is based on engineering judgment and past experience with prior applications. c. The design and service stress limits selected by the applicant for each set of design and service loading combinations as established in (a) are reviewed to determine if they meet those specified in Appendix A. The provisions for piping component functional capability are reviewed to determine their adequacy in meeting the objectives set forth in Appendix A. Deviations from the position may be permitted provided Justification is presented by the applicant. The acceptability determination is based on considerations of adequate margins of safety. 2. Design and Installation of Pressure Relief Devices The objective of the review of the design and installation of pressure relief devices is to assure the adequacy of the design and installation so that there is assurance of the integrity of the pressure relieving devices and associated piping during the functioning of one or more of the relief devices. In the CP review, it is determined whether there is reasonable assurance that the final design will meet these objectives. At the OL stage, the final design is reviewed to determine that the objec- tives have been met. The review is performed as follows: a. The design of the pressure retaining boundary of the device is reviewed by comparison with the Code. Since explicit rules are not yet available within the Code for the design of