Document: NUREG-0800
Document ID: 90076d28-a983-480c-a3d4-07687b2cee36
Document Type: srp
Title: AIRCRAFT HAZARDS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070378.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.6
CFR Part: 
CFR Title: 

Content:
996 3.5.1.6-4 Technical Rationale:34 The technical rationale for application of the above acceptance criteria to aircraft hazards is discussed in the following paragraphs. 1. 10 CFR Part 100, §100.10 establishes site requirements in conjunction with other design features regarding insuring a low risk of public exposure. A probability of less than 10-7 per year has been established as an NRC staff objective for meeting the requirements of 10 CFR Part 100. An evaluation of the probability of aircraft crashes at a nuclear facility in the vicinity of an airport have been performed (Reference 6). The basis for the distance and usage limits is to ensure a conservative upper bound on aircraft impact probability thereby limiting the overall probability of an exposure exceeding the 10 CFR Part 100 guidelines to less than 10 per year. Aircraft hazards that have the potential for -7 causing onsite accidents leading to the release of significant quantities of radioactive fission products, thus posing an undue risk of public exposure, must be shown to have a sufficiently low probability of occurrence. Meeting the probability, distance and usage requirements in regard to aircraft hazards and 10 CFR Part 100 exposure guidelines provides a high level of assurance that individuals will not be exposed to excessive radiation doses. 2. GDC 4 establishes requirements regarding the ability of SSC important to safety to be protected from dynamic effects, including the effects of missiles that may result from events and conditions outside the nuclear plant. Aircraft hazards are events outside of the nuclear plant that could have the potential for missile generation. The initiation of an externally generated missile due to aircraft impacts is a dynamic effect and the effect of those missiles on SSC important to safety must be evaluated. Regulatory Guide 1.117 provides acceptable methods for determining those SSC that should be protected. Protecting those SSC important to safety from the