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Process control and dosimetry applied to establish a relation between reference dose measurements and actual dose distribution

Abstract

The availability of the first commercial dose level indicator prompted attempts to verify radiation absorbed dose to items under quarantine control (e.g. for insect disinfestation) by some indicator attached to these items. Samples of the new commercial dose level indicators were tested for their metrological properties using gamma and electron irradiation. The devices are suitable for the intended purpose and the subjective judgement whether the threshold dose was surpassed is possible in a reliable manner. The subjective judgements are completely backed by the instrumental results. Consequently, a prototype reader was developed; first tests were successful. The value of dose level indicators and the implications of its use for food or quarantine inspection depends on a link between dose measured (indicated) at the position of such indicator and the characteristic parameters of the frequency distribution of dose throughout the product load i.e. a box or a container or a whole batch of multiple units. Therefore, studies into variability and statistical properties of dose distributions obtained under a range of commercial situations were undertaken. Gamma processing at a commercial multipurpose contract irradiator, electron processing and bremsstrahlung applications at a largescale research facility were included; products were apples, potatoes, wheat, maize, pistachio. Studies  More>>
Authors:
Ehlerman, D A.E. [1] 
  1. Institute of Process Engineering, Federal Research Centre for Nutrition, Karlsruhe (Germany)
Publication Date:
Mar 01, 2001
Product Type:
Conference
Report Number:
IAEA-TECDOC-1201
Reference Number:
EDB-01:039399
Resource Relation:
Conference: Final research co-ordination meeting on standardized methods to verify absorbed dose in irradiated food for insect control, Cascais (Portugal), 30 Mar - 3 Apr 1998; Other Information: 7 refs, 17 figs, 4 tabs; PBD: Mar 2001; Related Information: In: Standardized methods to verify absorbed dose in irradiated food for insect control. Proceedings of a final research co-ordination meeting, 129 pages.
Subject:
60 APPLIED LIFE SCIENCES; BREMSSTRAHLUNG; CHEMICAL DOSEMETERS; FRUIT FLIES; FRUITS; INSPECTION; PMMA; RADIATION DETECTION; RADIATION DOSES; RADIODISINFESTATION; TRADE
OSTI ID:
20154001
Research Organizations:
Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 1011-4289; TRN: XA0100684017958
Availability:
Available from INIS in electronic form
Submitting Site:
INIS
Size:
page(s) 65-84
Announcement Date:

Citation Formats

Ehlerman, D A.E. Process control and dosimetry applied to establish a relation between reference dose measurements and actual dose distribution. IAEA: N. p., 2001. Web.
Ehlerman, D A.E. Process control and dosimetry applied to establish a relation between reference dose measurements and actual dose distribution. IAEA.
Ehlerman, D A.E. 2001. "Process control and dosimetry applied to establish a relation between reference dose measurements and actual dose distribution." IAEA.
@misc{etde_20154001,
title = {Process control and dosimetry applied to establish a relation between reference dose measurements and actual dose distribution}
author = {Ehlerman, D A.E.}
abstractNote = {The availability of the first commercial dose level indicator prompted attempts to verify radiation absorbed dose to items under quarantine control (e.g. for insect disinfestation) by some indicator attached to these items. Samples of the new commercial dose level indicators were tested for their metrological properties using gamma and electron irradiation. The devices are suitable for the intended purpose and the subjective judgement whether the threshold dose was surpassed is possible in a reliable manner. The subjective judgements are completely backed by the instrumental results. Consequently, a prototype reader was developed; first tests were successful. The value of dose level indicators and the implications of its use for food or quarantine inspection depends on a link between dose measured (indicated) at the position of such indicator and the characteristic parameters of the frequency distribution of dose throughout the product load i.e. a box or a container or a whole batch of multiple units. Therefore, studies into variability and statistical properties of dose distributions obtained under a range of commercial situations were undertaken. Gamma processing at a commercial multipurpose contract irradiator, electron processing and bremsstrahlung applications at a largescale research facility were included; products were apples, potatoes, wheat, maize, pistachio. Studies revealed that still more detailed information on irradiation geometries are needed in order to render meaningful information from dose label indicators. (author)}
place = {IAEA}
year = {2001}
month = {Mar}
}