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:
e material presented to see whether it is similar to that recently reviewed on other plants and whether items of special safety significantce are 35 involved. The staff's review of the aircraft hazard assessment consists of the following steps: 1. Aviation Uses. Data describing aviation uses in the airspace near the proposed site, including airports and their approach paths, federal airways, Federal Aviation Administration (FAA) restricted areas, and military uses is obtained from Section 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 (References. 59, 711, 812, 913 and 1015) . In general, civilian 36 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 aircraft 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 ) FA should be estimated. This probability will depend on a number of factors 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 P is by using the following expression: FA P = C x N x A/w FA where: C = inflight crash rate per kilometer (crash rate per mile) for aircraft using airway, 37 w = width of airway (plus twice the distance from the airway edge to the site when the site is outside the airway) in kilometers (miles) , 38 N = number of flights per year along the airway, and A = effective area of plant in square kilometers (square miles) . 39 This gives a conservative upper bound on aircraft impact probability if care is taken in