Document: NUREG-0800
Document ID: 284fd3bf-f5c6-4587-bb1a-cd5dd92cc8f5
Document Type: srp
Title: AIRCRAFT HAZARDS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340536.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.6
CFR Part: 
CFR Title: 

Content:
ction 2.2.1-2.2.2 of the SAR. For many cases, no detailed analysis need be made as the probability can be judged adequately low based on a comparison with analyses previously performed (Refs. 5, 7, 8, 9 and 10). In general, civilian and military maps should be examined to verify that all aviation facilities of interest have been considered. In the process, the reviewer should develop an independent assessment of the aircraft hazards. Communications with agencies responsible for air- craft operations and the evaluation of aircraft operational data may be utilized; 2. Airways. For situations where federal airways or aviation corridors pass through the vicinity of the site, the probability per year of an aircraft crashing into the plant (P ) should be estimated. This probability will depend on a number of factts such as the altitude and frequency of the flights, the width of the corridor, and the corresponding distribution of past accidents. One way of calculating PFA is by using the following expression: PFA = C x N x A/w where: C = inflight crash rate per mile for aircraft using airway, w = width of airway (plus twice the distance from the airway edge to the site when the site is outside the airway) in miles, 3.5.1.6-3 Rev. 2 - July 1981 N = number of flights per year along the airway, and A = effective area of plant in square miles. This gives a conservative upper bound on aircraft impact probability if care is taken in using values for the individual factors that are meaning- ful and conservative. For commercial aircraft a value of C = 4 x 10-1o (Ref. 11) per aircraft mile has been used. For heavily traveled corridors.. (greater than 100 flights per day), a more detailed analysis may be required to obtain a proper value for this factor. 3. Civilian and Military Airports and Heli-Ports (Refs. 2, 4, and 14). The probability of an aircraft crashing into the site should be estimated for cases where one or more of the conditions in Item II.1 of the Acceptance Criteria