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:
esulting from (1) sustained loads, and (2) the DBPB. (b) The DBPB includes loads from the postulated pipe break, itself, and also any associated system transients or dynamic effects resulting from the postulated pipe break. 1.3.4 Service Limit D (a) Class 1, 2, and 3 components, component supports, and Class CS core support structures shall meet a service stress limit not 150 greater than Level D when subjected to the appropriate combination of loadings resulting from (1) sustained loads, (2) either the DBPB, MS/FWPB, or LOCA, and (3) and SSE. (b) The DBPB, MS/FWPB, and LOCA include loads from the postulated pipe breaks, themselves, and also any associated system transients or dynamic effects resulting from the postulated pipe breaks. Asymmetric blowdown loads on PWR primary systems shallshould be incorporated per NUREG-0609 (Reference 10). 151 152 DRAFT Rev. 2 - April 1996 3.9.3-24 2.0 OPERABILITY AND FUNCTIONAL CAPABILITY 2.1 Active Pumps and Valves SRP Section 3.10 (Reference 4) shallprovides guidance to reviewers to ensure that applicants demonstrate that the pumps or valves, as supported, can adequately sustain the designated combined service loadings at a stress level at least equal tobounded by the specified service limit., and can perform its Such demonstration provides assurance that pumps and valves can perform their safety function without impairment. Loads produced by the restraint of free end 153 displacement and anchor point motions shallshould be included. 154 2.2 Snubbers The operability requirements specified for mechanical and hydraulic snubbers installed on safety-related systems is subject to review by the staff. When snubbers are used, their need shallshould be clearly established and their design 155 criteria presented. 2.3 Functional Capability The design of Class 1, 2, and 3 piping components shallshould include a 156 functional capability assurance program. This program shallshould be used to157 demonstrate that the piping components, as