title: Statistical criteria to set alarm levels for continuous measurements of ground contamination.
abstract: In the course of the decommissioning of the ASTRA research reactor at the site of the Austrian Research Centers at Seibersdorf, the operator and licensee, Nuclear Engineering Seibersdorf, conducted an extensive site survey and characterization to demonstrate compliance with regulatory site release criteria. This survey included radiological characterization of approximately 400,000 m(2) of open land on the Austrian Research Centers premises. Part of this survey was conducted using a mobile large-area gas proportional counter, continuously recording measurements while it was moved at a speed of 0.5 ms(-1). In order to set reasonable investigation levels, two alarm levels based on statistical considerations were developed. This paper describes the derivation of these alarm levels and the operational experience gained by detector deployment in the field.
authors.affiliation: Nuclear Engineering Seibersdorf, A-2444 Seibersdorf, Austria. alexander.brandl@arcs.ac.at
authors.forename: A
authors.initials: A
authors.lastname: Brandl
authors.forename: A D Herrera
authors.initials: AD
authors.lastname: Jimenez
mesh_terms: D001317:Austria; D003625:Data Collection; D009688:Nuclear Reactors / Q000331:legislation & jurisprudence / Q000592:standards / Q000706:statistics & numerical data; D011834:Radiation Monitoring / Q000331:legislation & jurisprudence / Q000379:methods / Q000706:statistics & numerical data; D011835:Radiation Protection / Q000331:legislation & jurisprudence / Q000592:standards; D011850:Radioactive Waste; D017751:Safety Management / Q000331:legislation & jurisprudence / Q000592:standards; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D014875:Water Pollutants, Radioactive / Q000032:analysis
chemical_list: D011850:Radioactive Waste; D012990:Soil Pollutants, Radioactive; D014875:Water Pollutants, Radioactive