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:
des additional guidance on transient and dynamic loading effects from postulated pipe ruptures. Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. GDC 1 and 10 CFR 50.55a require that SSCs important to safety be designed to quality standards commensurate with the importance of the safety functions performed. The reactor internals include SSCs performing safety functions and SSCs whose failure can affect the performance of other SSC safety functions, including reactivity monitoring and control, core cooling, and fission product confinement (within both the fuel cladding and the primary reactor coolant system). Application of this requirement to the reactor internals provides assurance that established design practices of proven or demonstrated effectiveness achieve a high likelihood that these safety functions will be performed. 2. GDC 2, in part, requires that SSCs important to safety be designed to withstand the effects of earthquakes without loss of capability to perform their safety functions. Reactor internals perform safety functions, or might (through their failure) adversely impact the performance of safety functions (core cooling and fission product confinement). Application of GDC 2 to the reactor internals provides assurance that they will withstand earthquakes without damaging fuel cladding or interfering with core cooling. 3. GDC 4, in part, requires that SSCs important to safety be designed to accommodate the effects of and to be compatible with environmental conditions of normal operations, maintenance, testing, and postulated accidents, including LOCAs. Reactor internals perform safety functions, or might (through their failure) adversely impact the performance of safety functions (reactivity monitoring and control, core cooling, and fission product confinement). Application of GDC 4 to the reactor internals provides