ANSI ANS 2.6:2018 pdf download.Guidelines for Estimating Present & Projecting Future Population Distributions Surrounding Nuclear Facility Sites.
ANSI ANS 2.6 provides guidance for suitable procedures to develop estimates and forecasts of human population distribution around commercial and government-owned nuclear facility sites. This standard is intended to provide civilian and government professionals with methodologies that are generally acceptable in the demographic community and to facilitate the regulatory authority review of site suitability relative to population considerations. Methodologies will be ranked, as appropriate, with consideration to situation and location.
1.2 Purpose
This standard provides guidance for suitable procedures to develop estimates and forecasts of human population distribution around privately owned and government-owned nuclear sites that comply with regulatory requirements such as 10 CFR 50 [1], 10 CFR 51 [2], 10 CFR 100 [3], 10 CFR 830 [4], and 10 CFR 1021 [5].
1.3 Application
This standard provides guidance on determining population distribution and density to provide input for the safe siting of stationary nuclear facilities, encompassing the entire fuel cycle. This includes large (i.e., l(X)0-MWe and greater) power reactors, small modular reactors, uranium mining and processing facilities, fuel fabrication facilities, fuel processing facilities, and other nuclear-based facilities. This standard complies with the regulatory requirements of the United States but also provides demography- related insight into the methodologies for the safe siting of nuclear facilities in foreign countries.
2 Definitions and acronyms
2.1 Shall, should, and may shall, should, and may: The word “shall” is used to denote a requirement; the word “should” is used to denote a recommendation: and the word may” is used to denote permission, neither a requirement nor a recommendation.
2.2 Definitions
apportioning: The process of distributing population data from a dataset where data are aggregated in geographic units (e.g., census tracts or block groups) that do not match the polygon shape of the defined areas within the study area (e.g., sectors or uniform grid squares).
area-ratio method: A method of apportioning the population data whereby the population of a defined area (e.g., sectors or unifbrm grid squares) is expressed as a relative proportion of population of a larger geographic unit (e.g., a census tract or block group) in which the defined area is located.
base year: The year from which the demographic data used in the analysis originated. Most typically it is the most recent census data.
census block: The smallest area for which the United States collects population data. Census blocks are bounded by visible features, such as streets, roads, streams, and railroad tracks, and by nonvisible boundaries, such as selected property lines and city, township, school district, and county limits and short line-of-sight extensions of streets and roads. Generally, census blocks are small in area—for example, a block in a city hounded on all sides by streets, hut census blocks in suburban and rural areas can he large. In remote areas, census blocks can encompass hundreds of square miles. Census blocks cover the United States and its territories. Census blocks nest within all other tabulated Census Bureau geographic units and are the basis for all tabulated data.
census block group: A statistical division consisting of one or more census blocks generally defined to contain between 600 and 3000 people.
Census Bureau geographic unit: The term means any of the following: block, block group. county. county equivalent, census county divisions, census tract, enumeration district, incorporated places (e.g., cities or villages), minor civil division (e.g., town or township), or state.
census tract: A small, relatively permanent statistical subdivision of a county delineated by a local committee of census data users to provide a stable set of geographic units for the presentation of statistical data. Census tracts nest within counties, and their boundaries normally follow visible features hut may also follow legal geographic boundaries.
centroid: Arithmetic mean position of all the points in a plane figure or two-dimensional shape. The definition extends to any object in n-dimensional space, where its centroid is the mean position of all points in all coordinate directions.
centroid method: A method of apportioning population data whereby the entire population of a census unit (e.g.,census block) is assumed to be located at the centroid of the census unit (e.g., census block).ANSI ANS 2.6 pdf download.