ML18129A168
| ML18129A168 | |
| Person / Time | |
|---|---|
| Site: | Clinch River |
| Issue date: | 05/15/2018 |
| From: | Seshagiri Tammara NRC/NRO/DSEA |
| To: | Advisory Committee on Reactor Safeguards |
| Fetter A, 301-415-8556 | |
| Shared Package | |
| ML18129A161 | List: |
| References | |
| Download: ML18129A168 (4) | |
Text
1 Presentation to the ACRS Subcommittee Safety Review of the Clinch River Nuclear Site, Early Site Permit Application Aircraft Hazards: (SSAR Section 3.5.1.6)
Presented by Seshagiri Rao Tammara, Technical Reviewer NRO/DSEA/RPAC May 15, 2018
2 Key Review Areas 3.5.1.6 Aircraft Hazards For the site suitability, the plant design should consider that any of the aircraft accidents is not a design basis event (where the aircraft accident could lead to radiological consequences in excess of the exposure guidelines of 10 CFR 50.34(a)(1) with a probability of occurrence greater than an order of magnitude of 10-7 per year)
Federal airways, holding patterns, or approach patterns should be at least 2 statute miles away Military installation or any airspace usage (e.g., bombing ranges) should be at least 20 miles from site All airports should be at least 5 miles from site
3 Key Review Areas 3.5.1.6 Aircraft Hazards (Contd)
All airports should have projected operations less than:
1.
500d2 for airports within a distance (d) of 5 to 10 miles 2.
1000d2 for airports outside of 10 miles distance (d)
Staff reviewed the applicants information pertaining to site-specific aircraft analysis (aircraft hazards).
The applicant calculated the aircraft crash probability for the identified two airways (V16 and J46) which are within 3.2 km (2 mi) of the CRN Site.
The applicant determined the aircraft crash probability of 7.53 x 10-7 per year using non-airport operations referenced in DOE-STD-3014-96, Accident Analysis for Aircraft Crash into Hazardous Facilities.
4 Key Review Areas 3.5.1.6 Aircraft Hazards (Contd)
The staff performed independent confirmatory aircraft crash probability calculations using the highest recent 5-year (2011-2015) Federal Aviation Administration (FAA) supplied flight operations data within 8 km and 16.1 km (5 mi and 10 mi) of site.
The potential aircraft crash probability of 1.5 x 10-8 per year is conservatively estimated by the staff, assuming that all the flights within 16.1 km (10mi) of CRN Site from FAA data follow these two airways.
Therefore, staff agrees with applicants conclusion that the aircraft crash probability is about an order of magnitude of 10-7 per year or less and meets the provided guidelines.