Document: NUREG-0800
Document ID: d51db4b1-0b68-4e27-8107-a41ccdbd671a
Document Type: srp
Title: ASME CODE CLASS 1, 2, AND 3 COMPONENTS, COMPONENT SUPPORTS,
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070337.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.3
CFR Part: 
CFR Title: 

Content:
ulated water slugs where water seals are used and subcooled or saturated liquid if such fluid can be discharged under postulated transient or accident conditions. PlantsApplicants for plants utilizing suppression pools shallshould also consider the applicable pool 38 39 dynamic loads on the safety relief valve system. Stress computations and stress limits must be in accord with applicable rules of the Code. DRAFT Rev. 2 - April 1996 3.9.3-6 3. Component Supports a. The component support designs should provide adequate margins of safety under all combinations of loadings. The combination of loadings (including system operating transients) considered for each component support within a system, including the designation of the appropriate service stress limit for each loading combination should meet the criteria in Appendix A, and Regulatory Guides 1.124 and 1.130, (References 7 and 8)and Section III, Division 1, subsection NF of the Code.40 Component supports of active pumps and valves should be considered in context with the other features of the operability assurance and seismic qualification41 program as presented in SRP Section 3.10. If the component support affectsdeformation can be expected to affect the operability requirements of the 42 supported component, then deformation limits should also be specified. Such deformation limits should be compatible with the operability requirements of the components supported andsupported components. These deformation limits should be incorporated into the operability assurance and seismic qualification 43 44 program. In establishing allowable equipment deformations, the possible 45 movements of the support base structures must be taken into account. b. Where snubbers are utilized as supports for safety-related systems and components, acceptable criteriaCriteria for snubber operability assurance should 46 contain the following elements: (1) Structural Analysis and Systems Evaluation. Systems and components which utilize