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:
ontain: (i) the general functional requirements, (ii) operating environment, (iii) applicable codes and standards, (iv) materials of construction and standards for hydraulic fluids and lubricants, (v) environmental, structural, and performance design verification tests, including required dynamic qualification, testing and extrapolation methods supporting qualification of large bore hydraulic snubbers with rated load capacities of 50 Kips or more as recommended in NUREG/CR-5416 (Reference 14),53 (vi) production unit functional verification tests and certification, (vii) packaging, shipping, handling, and storage requirements, and (viii) description of provisions for attachments and installation. 54 In addition, the procurement program should include provisions for the snubber manufacturer should be requested to submit his quality 55 56 assurance and assembly quality control procedures for review and acceptance by the purchaser. (4) Installation and Operability Verification Assurance that all snubbers andare properly installed prior to 57 preoperational piping vibration and plant start-up tests should be provided. Visual observation of piping systems and measurement of thermal movements during plant start-up tests couldmay be used by the applicant to verify that snubbers are operable (not locked up). Provisions for such 58 examinations and measurements should be discussed in 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. These snubbers may not have been included in the 59 design analysis. This could occur as a result of unanticipated piping vibration, as discussed in SRP Section 3.9.2, or interference problems 60 during construction. The effects of such installationsnubbers should be 61 3.9.3-9 DRAFT Rev. 2 - April 1996 fully evaluated and documented to demonstrate that normal plant operations