An approximate method to calculate 12 Rad zone
At the Savannah River Site (SRS), criticality alarm systems, as discussed in ANS 8.31 and DOE Order 2-420.1 are known as Nuclear Incident Monitors (NIMs). The NIM system is provided to cover occupied areas in a facility in which the expected dose exceeds 12 Rad in free air, and it includes criticality accident detection devices and personnel evacuation alarms. At SRS, the area within the 12 Rad zone is defined as the area to be evacuated. Past evaluations of evacuation zones ranged from simple point kernel to extensive MCNP4A3 models. This paper outlines an improved, yet simple and conservative methodology (based on semi-empirical equations and factors) to estimate the 12 Rad zone boundary. The following sections discuss the different factors considered for this methodology.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC09-96SR18500
- OSTI ID:
- 750861
- Report Number(s):
- WSRC-MS-99-00956; TRN: US0001093
- Resource Relation:
- Conference: 2000 Annual Meeting and Embedded Topical Meetings, San Diego, CA (US), 06/04/2000--06/08/2000; Other Information: PBD: 18 Jan 2000
- Country of Publication:
- United States
- Language:
- English
Similar Records
Improved Methodology Application for 12-Rad Analysis in a Shielded Facility at SRS
Conservatism in SRS Criticality Alarm System 12 Rad Zone Calculations - How Much is Enough?