Document: NUREG-0800
Document ID: aa3b5784-eb99-4a68-8239-530a67fb6f41
Document Type: srp
Title: SITE PROXIMITY MISSILES (EXCEPT AIRCRAFT)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340531.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.5
CFR Part: 
CFR Title: 

Content:
2.2.3, | PMR = probability of missiles reaching the plant, PSC =probability of missiles striking a vulnerable critical area of the plant, Pp= probability of missiles exceeding the energies required to penetrate to vital areas (e.g., based on wall thickness provided for tornado 3.5.1.5-2 Rev. 1 - July 1981 I missiles), or producing secondary missiles which could damage vital equipment, and N = number of missiles generated by the design basis event. Pp may be assumed to be equal to 1 as a first step in the analysis. If PT thus calculated is greater than 10-7 per year, then missile effects on SSC should be estimated by SEB on request by SAB. The request should be accompanied by a specified missile description, including missile size, shape, weight, energy, material properties, and trajectory. IV. EVALUATION FINDINGS Based upon the nature of activities around the site and the review performed, the staff provides an evaluation in one of the following forms, to be included in the staff's safety evaluation report. 1. The staff concludes that the site location, in conjunction with other considerations (such as plant design, construction, and operation) is accep- table and meets the requirements of 10 CFR Part 100, §100.10. This conclu- sion is based on the information provided by the applicant and reviewed by the staff which demonstrates that the probability of site proximity missiles adversely affecting safety-related structures, systems and components is acceptably low (within the criteria given in SRP Section 2.2.3), and that the site location has been determined to insure a low risk of public exposure due to the hazard of site proximity missiles. 2. The staff concludes that the protection for structures, systems, and com- ponents important to safety is acceptable and meets the requirements of General Design Criteria 4 of Appendix A to 10 CFR Part 50. This conclu- sion is based on the information provided by the applicant and reviewed by the staff which identified