ICP-SFMS Messung von 234U, 235U, 238U und 232Th zur Arbeitsplatzüberwachung
Abstract
REE-processing industries use raw materials containing significant levels of natural radionuclides. The processing of these materials can expose workers and people living near such sites to radiation levels well above the natural background. This radioactivity is mainly due to nuclides belonging to the 238U and 232Th decay chains. The COUNCIL DIRECTIVE 96/29/EURATOM of 13 May 1996 lays down basic safety standards for the protection of the health of workers and the general public against the dangers arising from ionizing radiation. In this project the limits assessed by the EURACHEM guidline for 234U, 235U, 238U und 232Th are controlled by inductively coupled plasma sector field mass spectrometry (ICP-SFMS). Quantification of 238U anf 232Th is performed via isotope dilution. Since the knowledge of secular equilibrium conditions is necessary in order to make correct assumptions for the dose assessment, additionally, the ratios 234U /238U and 235U/238U are determined. For quality control alpha-spectrometry is used as an alternative method.
Schlagworte ICP-MS 232Th, 234U, 235U, 238U isotope dilution
Publikationen
Mitarbeiter*innen
Stephan Hann
Univ.Prof. Dr. Stephan Hann
stephan.hann@boku.ac.at
Tel: +43 1 47654-77001, 77191
Projektleiter*in
01.01.2001 - 30.11.2003
Gerhard Josef Stingeder
Univ.-Prof. i.R. Dipl.-Ing. Dr.techn. Gerhard Josef Stingeder
gerhard.stingeder@boku.ac.at
Projektmitarbeiter*in
01.01.2001 - 30.11.2003
BOKU Partner
Externe Partner
Treibacher Industrie AG
keiner
Partner
ARC Seibersdorf research GmbH, Biogenetics - Natural Resources, Abteilung Umweltforschung
Dr. Maringer
Partner