Statistical Methods for Estimating the Uncertainty in the Best Basis Inventories

WILMARTH, S.R.

CH2M Hill Hanford Group, Inc.

关键词: Statistics;    99 General And Miscellaneous//Mathematics, Computing, And Information Science;    Radioactive Wastes;    Calculation Methods;    12 Management Of Radioactive Wastes, And Non-Radioactive Wastes From Nuclear Facilities;   

DOI  :  10.2172/804778
RP-ID  :  RPP-6924, Rev.0
RP-ID  :  AC27-99RL14047
RP-ID  :  804778

美国|英语

来源: UNT Digital Library

【 摘 要 】

This document describes the statistical methods used to determine sample-based uncertainty estimates for the Best Basis Inventory (BBI). For each waste phase, the equation for the inventory of an analyte in a tank is Inventory (Kg or Ci) = Concentration x Density x Waste Volume. the total inventory is the sum of the inventories in the different waste phases. Using tanks sample data: statistical methods are used to obtain estimates of the mean concentration of an analyte the density of the waste, and their standard deviations. The volumes of waste in the different phases, and their standard deviations, are estimated based on other types of data. The three estimates are multiplied to obtain the inventory estimate. The standard deviations are combined to obtain a standard deviation of the inventory. The uncertainty estimate for the Best Basis Inventory (BBI) is the approximate 95% confidence interval on the inventory.