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:
o preoperational piping vibration and plant start-up tests should be provided. Visual observation of piping systems and measure- ment of thermal movements during plant start-up tests could verify that snubbers are operable (not locked up). Provisions for such examinations and measurements should be discussed in 3.9.3-6 Rev. 1 - July 1981 the piping preoperational vibration and plant start-up test programs as described in SRP Section 3.9.2. (5) Use of Additional Snubbers Snubbers could in some instances be installed during or after plant construction which may not have been included in the design analysis. This could occur as a result of unanticipated piping vibration as discussed in SRP Section 3.9.2 or interference problems during construction. The effects of such installation should be fully evaluated and documented to demonstrate that normal plant operations and safety are not diminished. (6) Inspection and Testing Inservice inspection and testing are critical elements of oper- ability assurance programs for mechanical components. The appli- cant should provide a discussion of accessibility provisions for maintenance, inservice inspection and testing, and possible repair or replacement of snubbers consistent with the requirements of the NRC Standard Technical Specifications. (7) Classification and Identification All safety-related components which utilize snubbers in their support systems should be identified and tabulated in the FSAR. The tabulation should include the following Information: (I) identification of the systems and components in those systems which utilize snubbers, (ii) the number of snubbers utilized in each system and on components in that system, (iii) the type(s) of snubber (hydraulic or mechanical) and the corresponding supplier identified, (iv) specify whether the snubber was constructed to the rules of ASME Code Section III, Subsection NF, (v) state whether the snubber is used as a shock, vibration, or dual purpose snubber, and (vi) for