Document: NUREG-0800
Document ID: ec05e779-56d2-4f40-be68-9fceb91114ab
Document Type: srp
Title: THREADED FASTENERS1
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070293.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.13
CFR Part: 
CFR Title: 

Content:
)14 3. Procedures and programs for each of the applications listed below: a. Threaded fastener applications in the RCPB and RCS, including the following: (1) Reactor head studs; (2) RCS internals; (3) RCPB pipe, pump, and valve flanges; and (4) RCS pump and valve internal fasteners. 3.13-5 DRAFT Rev. 0 - April 1996 b. Threaded fastener applications in pressure-retaining joints of seismic Category I components other than the RCPB or the RCS, including the following: (1) Pipe, pump, and valve flanges; and (2) Pump and valve internal fasteners. c. Threaded fasteners for nonpressure-retaining applications of seismic Category I components and of seismic Category I component supports and structures: (1) Component support hold-down fasteners, and (2) Structural connections. d. Threaded fastener applications in SC I-related SSCs: (1) Pipe, pump, and valve flanges; (2) Pump and valve internal fasteners; (3) Component support hold-down fasteners; and (4) Structural connections.15 4. For the threaded fasteners and their applications cited in subsections I.C.1, I.C.2, and I.C.3, programs and procedures related to the following issues are reviewed: a. Design (1) The loading of threaded fasteners and the number of fasteners to resist specific load combinations are reviewed in accordance with the SRP section for the SSCs in which such fasteners are installed. [NOTE: There may be some redundancy in this SRP section regarding this topic. The review should be coordinated with the primary review branch for the particular SSC.] (2) Fastener types (e.g., hex, cap screw, fine thread, coarse thread), nut types (e.g., hex, locknut), washer types (e.g., flat, lock, star, tab), and locking devices (e.g., wires, locking compounds) should be appropriate for the application. (3) Fastener materials and interfacing materials should be compatible. Materials and properties, including the following, should be considered for both the fasteners and their joined parts: DRAFT Rev. 0 - April 1996 3.13-6