Document: NUREG-0800
Document ID: 29fa664a-a42c-4ff0-8ae1-3798f7f23c23
Document Type: srp
Title: TURBINE MISSILES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070373.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.3
CFR Part: 
CFR Title: 

Content:
ce 4.28 DRAFT Rev. 3 - April 1996 3.5.1.3-10 Technical Rationale29 The technical rationale for application of these acceptance criteria to protecting safety-related structures, systems, and components from the effects of turbine missiles is discussed in the following paragraphs:30 Compliance with GDC 4, "Environmental and Dynamic Effects Design Bases," requires that components important to safety be designed to accommodate the effects of, and be compatible with, environmental conditions associated with normal operation, maintenance, testing, and postulated accidents, including loss-of-coolant accidents. Components are to be protected against dynamic effects, including the effects of missiles, pipe whipping, and discharging fluids that may be the result of equipment failure or of events and conditions outside the nuclear power unit. The protection of safety-related structures, systems, and components form the effects of turbine missiles is discussed in this SRP section. The staff requires that the probability of damage to such equipment be calculated as less than 1 in 10 million per plant per year. Specific guidance regarding the arrangement, design, and inspection of turbine generators is provided to ensure that the probability of turbine missile damage will not exceed the limit value during the life of the plant. Meeting the requirements of GDC 4 provides assurance that structures, systems, and components important to safety will be protected from the effects of turbine missiles and will be capable of performing their intended safety function.31 III. REVIEW PROCEDURES The reviewer selects and emphasizes aspects of the areas covered by this SRP section as may be appropriate for a particular case. The judgment on areas to be given attention and emphasis in the review is based on an inspection of the material presented to see whether it is similar to that recently reviewed on other plants and whether items of special safety significance are involved. Upon request from