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:
s, 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 elements and the reactivity control elements out to the coupling interfaces with the drive units (the fuel system design is addressed in SRP Section 4.2, “Fuel System Design”). 2. Control rod drive elements (the drive elements inside the guide tubes, as well as additional portions of the control rod drive system that may be internal to the reactor vessel assembly of SMRs, are addressed in SRP Section 3.9.4, “Control Rod Drive Systems,” but the guide tubes are reviewed with the reactor internals in this SRP section). 3. In-core instrumentation (in-core instrumentation support structures are reviewed with the reactor internals in this SRP section). Section 3.9.5, “Reactor Pressure Vessel Internals,” of the Design-Specific Review Standard (DSRS) for the Babcock and Wilcox (B&W) mPower iPWR Design (issued for interim use and comment and available at Agencywide Documents Access and Management System (ADAMS) Accession No. ML12272A077) provides additional guidance for the review of the mPower iPWR Design reactor internals. The staff’s review includes consideration of the design input parameters and the design basis loads and load combinations for plant components for normal operation, upset, emergency, and faulted conditions. The review also addresses the analytical methodologies, assumptions, the code, and code edition for the evaluation of the plant components. The review also includes a comparison of stresses against code allowable limits. The specific areas of review are as follows: 1. The physical or design arrangements of all reactor internals structures, components, assemblies, and systems, are evaluated including the positioning and securing of such items within the RPV, the provision for axial and lateral retention and support of the internals