Document: NRC Regulatory Guide
Document ID: 8a2332d3-66ca-40af-84e1-507db8b26559
Document Type: regulatory_guide
Title: TRIAL - Acceptability of Probabilistic Risk Assessment Results for Non-Light Water Reactor Risk-Informed Activities
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2123/ML21235A008.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.247
CFR Part: 
CFR Title: 

Content:
ion is to provide information on the population distribution and patterns of land use and land cover in the vicinity and region of a site to a distance of 80 6 Radiological consequence analyses may be performed for a variety of applications, including (but not limited to) assessments used to demonstrate compliance with the dose guidelines of 10 CFR 50.34 (a)(1) and to assist in the preparation of environmental impact statements. The consequence analyses developed under this section are expected to require modification if they are to be used to support those applications. Additional application-specific guidance (e.g., NUREG-0800; NUREG-1555, “Standard Review Plans for Environmental Reviews for Nuclear Power Plants: Environmental Standard Review Plan” (Ref. 37); and their supporting documents) is available. RG 1.247, Page 46 kilometers (km) (50 miles (mi)). The location of the exclusion area boundary is identified. The distribution of the population around a site is based on recognized demographic sources, such as census data or local surveys. It is adjusted for population growth and may represent variations in population density surrounding a site. Land use information, such as the distribution of land used for farming and the distribution of water bodies around a site, is based on recognized sources of local or regional geographic information and represents variations in land use and land cover surrounding a site. For PRAs performed prior to selecting a proposed site, the site characterization PRA analysis element is addressed with postulated site data that contain sufficient information to allow comparison of the postulated site data to site data representative of certain points over the life of a proposed facility. The characteristics and attributes needed to achieve the objectives of the site characterization PRA analysis element are as follows: • The distribution of the population in the vicinity and region of a site to a distance of 80 km (50 mi) is