You need JavaScript to view this

Measurement of contamination by {sup 241}Am; Maaling af {sup 241}Am-kontaminering

Technical Report:

Abstract

In relation to the fact that four employees at the Danish Isotope Center who had regularly cleaned the smoke detectors used for control measurements were found to be contaminated with {sup 241}Am, the aim was to investigate the suitability of the Phoswich detector system for measurement of contamination of humans by {sup 241}Am. It was also wished to compare this measuring method with other selected ones. The measurement results are presented in detail. It was found that measurements taken on the cranium with the Phoswich detectors were more suitable for measurement of contamination by {sup 241}Am than the use of a Ge detector on the liver, - because of the first-named method`s greater degree of measuring efficiency, (0.013 cps/Bq compared with 0.0001 cps/Bq in the case of Ge detector measurement) and lower minimum detectable activity in relation to that activity that was measured on A1 (one of the employees). It was found that Phoswich-detector measurement and measuring of urine samples supplemented each other in a satisfactory way. The Phoswich detector enables a quick measurement of the degree of seriousness of the contamination of a person and a relatively accurate determination of the calculated intake of contamination which has a size  More>>
Publication Date:
Aug 01, 1991
Product Type:
Technical Report
Report Number:
NEI-DK-997
Reference Number:
SCA: 560101; PA: AIX-24:006229; SN: 93000931286
Resource Relation:
Other Information: PBD: Aug 1991
Subject:
61 RADIATION PROTECTION AND DOSIMETRY; AMERICIUM 241; MEASURING METHODS; OCCUPATIONAL EXPOSURE; RADIATION DETECTORS; ANNUAL LIMIT OF INTAKE; COMPARATIVE EVALUATIONS; CONTAMINATION; PERSONNEL; PHOTOELECTRIC EFFECT; SMOKE DETECTORS; 560101; DOSIMETRY AND MONITORING
OSTI ID:
10118873
Research Organizations:
Copenhagen Univ. (Denmark). H.C. Oersted Inst.
Country of Origin:
Denmark
Language:
Danish
Other Identifying Numbers:
Other: ON: DE93611766; ISBN 87-87438-10-0; TRN: DK9200134006229
Availability:
OSTI; NTIS; INIS
Submitting Site:
DKN
Size:
[176] p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Hemmingsen, L B.S. Measurement of contamination by {sup 241}Am; Maaling af {sup 241}Am-kontaminering. Denmark: N. p., 1991. Web.
Hemmingsen, L B.S. Measurement of contamination by {sup 241}Am; Maaling af {sup 241}Am-kontaminering. Denmark.
Hemmingsen, L B.S. 1991. "Measurement of contamination by {sup 241}Am; Maaling af {sup 241}Am-kontaminering." Denmark.
@misc{etde_10118873,
title = {Measurement of contamination by {sup 241}Am; Maaling af {sup 241}Am-kontaminering}
author = {Hemmingsen, L B.S.}
abstractNote = {In relation to the fact that four employees at the Danish Isotope Center who had regularly cleaned the smoke detectors used for control measurements were found to be contaminated with {sup 241}Am, the aim was to investigate the suitability of the Phoswich detector system for measurement of contamination of humans by {sup 241}Am. It was also wished to compare this measuring method with other selected ones. The measurement results are presented in detail. It was found that measurements taken on the cranium with the Phoswich detectors were more suitable for measurement of contamination by {sup 241}Am than the use of a Ge detector on the liver, - because of the first-named method`s greater degree of measuring efficiency, (0.013 cps/Bq compared with 0.0001 cps/Bq in the case of Ge detector measurement) and lower minimum detectable activity in relation to that activity that was measured on A1 (one of the employees). It was found that Phoswich-detector measurement and measuring of urine samples supplemented each other in a satisfactory way. The Phoswich detector enables a quick measurement of the degree of seriousness of the contamination of a person and a relatively accurate determination of the calculated intake of contamination which has a size of at least twice the annual limit of intake size. Measurements of urine samples enable smaller amounts of contamination to be revealed, but this takes ca. 32 weeks and is less accurate than Phoswich measurement especially if a long time has elapsed after the intake. (AB) (34 refs.).}
place = {Denmark}
year = {1991}
month = {Aug}
}