Document: NUREG-0800
Document ID: 5e3dbec9-a39f-4531-9eb9-705982190066
Document Type: srp
Title: REACTOR PRESSURE VESSEL INTERNALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1613/ML16134A059.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.5
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Organization responsible for mechanical engineering reviews Secondary - None I. AREAS OF REVIEW Reactor pressure vessel (RPV) internals consist of all structural and mechanical elements inside the reactor vessel in nuclear power plants. The U.S. Nuclear Regulatory Commission (NRC) regulations in Title 10 of the Code of Federal Regulations (10 CFR) Part 50, “Domestic Licensing of Production and Utilization Facilities,” Appendix A, “General Design Criteria (GDC) for Nuclear Plants,” GDC 1, “Quality Standards and Records,” GDC 2, “Design Bases for Protection against Natural Phenomena,” GDC 4, "Environmental and Dynamic Effects Design Bases," and GDC 10, "Reactor Design,"; 10 CFR 50.55a, “General Provisions”; and 10 CFR Part 52, “Licenses, Certifications, and Approvals for Nuclear Power Plants”; require that structures and components important to safety be constructed and tested to quality standards commensurate with the importance of the safety functions performed and designed with appropriate margins to withstand effects of anticipated operational occurrences and normal operation, natural phenomena such as earthquakes, postulated accidents including loss-of-coolant accidents (LOCAs), and events and conditions outside the nuclear power unit. 3.9.5-2 Revision 4 – March 2017 Some plant components, such as the steam dryer in a boiling water reactor (BWR) nuclear power plant, perform no safety function but must retain their structural integrity to avoid the generation of loose parts that might adversely impact the capability of other plant equipment to perform safety functions. For the purpose of this Standard Review Plan (SRP) section, the term "reactor internals" includes core support and other internal structures, and refers to all structural and mechanical elements inside the RPV of BWRs, pressurizer water reactors (PWRs) and small modular reactors (SMRs) with the exception of the following: 1. Reactor fuel