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:
be included as valve discharge loads. The structural response of the piping and support system is reviewed with particular attention to the dynamic or time-history analyses employed in evaluating the appropriate support and restraint stiffness effects under dynamic loadings when valves are discharging. WhereIf the use of hydraulic snubbers is proposed, the snubber performance 13 characteristics are reviewed to assureensure that their effects have been considered in 14 the analyses under steady state valve operation and repetitive load applications caused by cyclic valve opening and closing during the course of a pressure transient. 3.9.3-3 DRAFT Rev. 2 - April 1996 3. Component Supports The review of information submitted by the applicant includes an evaluation of Code Class 1, 2, and 3 components supports. The review includes an assessment of design and structural integrity of the supports. The review addresses three types of supports: plate and shell, linear, and component standard types. All the component supports of these three types are covered in this SRP section. Although classified as component standard supports, snubbers require special consideration due to their unique function. Snubbers provide no load path or force transmission during normal plant operations but function as rigid supports when subjected to dynamic transient loads. Component supports are those metal supports which are designed to transmit loads from the pressure-retaining boundary of the component to the building structure. The methods of analysis for calculating the responses of the reactor coolant pressure boundary supports resulting from the combination of LOCA and SSE events are reviewed in SRP Sections 3.6.2 and 3.9.2. Review Interfaces15 The EMEB also performs the following reviews under the SRP sections indicated: The Equipment Qualification Branch (EQB) eEvaluates the operability of pumps and valves and judges the design criteria for pressure-relieving devices which may have an