Document: NUREG-0800
Document ID: 85a8d3b1-a30b-4282-8217-8bc68986145a
Document Type: srp
Title: ASME CODE CLASS 1, 2, AND 3 PIPING SYSTEMS, PIPING COMPONENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1404/ML14042A513.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.12
CFR Part: 
CFR Title: 

Content:
isplacement, etc.. xviii. Intersystem LOCA In SECY-90-016, “Evolutionary Light Water Reactor (LWR) Certification Issues and Their Relationship to Current Regulatory Requirements,” dated January 2, 1990, the NRC staff presented positions on intersystem LOCA for evolutionary LWRs that the Commission approved in the associated SRM dated June 26, 1990 (and later for passive plants in the SRM on SECY-93-087). To the extent practicable, low-pressure systems should be designed to withstand full RCS pressure. Meeting this acceptance criterion provides assurance that over pressurization of low-pressure piping systems due to RCPB isolation failure will not result in rupture of the low-pressure piping outside containment. xix. Effects of Environment on Fatigue Design The guidance provided in RG 1.207 is applicable. D. Piping Support Design The piping system supports must provide adequate margins of safety to maintain the functionality of the piping components under all combinations of loadings. 3.12-12 Revision 1 – April 2014 i. Applicable Codes The design of ASME Code, Section III, Class 1, 2, and 3, piping supports should comply with the design criteria requirements of ASME Code, Section III, Subsection NF. ii. Jurisdictional Boundaries The jurisdictional boundaries between pipe supports and interface attachment points should comply with ASME Code, Section III, Subsection NF. iii. Loads and Load Combinations The criteria provided in SRP Section 3.9.3, Subsection II.1 are applicable. iv. Pipe Support Baseplate and Anchor Bolt Design The design of the pipe support baseplates and anchor bolts should comply with guidance provided in NRC BL 79-02, Revision 2. v. Use of Energy Absorbers and Limit Stops Piping systems that use energy absorbers and limit stops should be analyzed with methods specific to the design of these components. The evaluation typically consists of iterative response spectra analyses of the piping and support system. The analyses will be reviewed on a