Document: NUREG-0800
Document ID: 83a8f386-800e-4c29-992a-98030c7ea7d6
Document Type: srp
Title: AIRCRAFT HAZARDS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1003/ML100331298.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.6
CFR Part: 
CFR Title: 

Content:
eration ( PM ) is then given for this case by the following expression: P C A M = × 3.5.1.6-9 Revision 4 - March 2010 where: C = total probability of an aircraft crash per square mile per year in the vicinity of the site from the airports being considered A = effective area of one unit of the plant in square miles Where estimated risks from military aircraft activity are found to be unacceptably high, suitable airspace or airway relocation should be implemented. Past experience has been that military authorities have been responsive to modification of military operations and relocation of training routes in close proximity to nuclear power plant sites. 5. Holding Patterns. Holding patterns are racetrack-shaped courses at specified altitudes, associated with one or more radio-navigational facilities, where aircraft can Acircle@ while awaiting clearance to execute an approach to a landing at an airport or to continue along an airway. Holding patterns that are sufficiently distant from the plant need not be considered (see Subsection II above). Otherwise, traffic in the holding pattern should be converted into equivalent aircraft passages taking into account the characteristics, including orientation with respect to the plant, of the holding pattern. The information in item III.2 above should be used in this evaluation. 6. The total aircraft hazard probability at the site equals the sum of the individual probabilities obtained in the preceding steps. 7. The effective plant areas used in the calculations should include the following: A. A shadow area of the plant elevation upon the horizontal plane based on the assumed crash angle for the different kinds of aircraft and failure modes. B. A skid area around the plant as determined by the characteristics of the aircraft under consideration. Artificial berms or any other manmade and natural barriers should be taken into account in calculating this area. C. The areas of those safety-related SSCs are susceptible to impact