Kärnenergiteknik

Kommittébeteckning: SIS/TK 405 (Kärnenergi)
Källa: ISO
Svarsdatum: den 22 mar 2019
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This document specifies the dose assessment method when an RPLD is used for dosimetry audit in external high energy X-ray beam radiotherapy.

The dosimetry for electron beams and X-ray beams of stereotactic radiotherapy, gamma-ray of brachytherapy is not included in this version.

This document addresses RPLD handling, measurement method, conversion of measured value to dose, necessary correction coefficient, and the performance requirements for RPLD systems including reader.

Ämnesområden: Kärnenergiteknik: allmänt
Kommittébeteckning: SIS/TK 405 (Kärnenergi)
Källa: ISO
Svarsdatum: den 1 apr 2019
Se merSe mindre
 

This document applies to the testing of surfaces which may become contaminated by radioactive materials.

The ease of decontamination is a property of a surface and an important criterion for selecting surface materials used in the nuclear industry, interim storage or disposal facilities from which contamination can be removed easily and rapidly without damaging the surface. The test described in this document is a rapid laboratory-based method to compare the ease of decontamination of different surface materials.

The results from the test may be one parameter to take into account when selecting surface coatings such as varnish or imperious layers such as ceramics and other surfaces. The radionuclides used in this test are those commonly found in the nuclear industry (137Cs, 134Cs and 60Co) in aqueous form. The test can also be adopted for use with other radionuclides and other chemical forms, depending on the customer requirements, if the solutions are chemically stable and do not corrode the test specimen.

The test does not measure the ease of decontamination of the surface materials in practical use, as this depends on the radionuclide(s) present, their chemical form, the duration of exposure to the contaminant and the environmental conditions amongst other factors.

The test method is not intended to describe general decontamination procedures or to assess the efficiency of decontamination procedures (see ISO 7503- series).

In practical applications, it may be important to consider other factors, such as chemical, mechanical and radiation resistance and long-term stability in the selection of the materials to be used. It should be recognized that further decontamination tests under simulated service conditions may be needed.

Ämnesområden: Kärnenergiteknik: allmänt
Kommittébeteckning: SIS/TK 405 (Kärnenergi)
Källa: ISO
Svarsdatum: den 1 apr 2019
Se merSe mindre
 

This document specifies the different leakage test methods for sealed sources. It gives a comprehensive set of procedures using radioactive and non-radioactive means.

This document applies to the following situations:

— leakage testing of test sources following design classification testing in accordance with ISO 2919;

— production quality control testing of sealed sources;

— periodic inspections of the sealed sources performed at regular intervals, during the working life.

Annex A of this document gives guidance to the user in the choice of the most suitable method(s) according to situation and source type.

It is recognized that there may be circumstances where special tests, not described in this document, are required.

It is emphasized, however, that insofar as production, use, storage and transport of sealed radioactive sources are concerned, compliance with this document is no substitute for complying with the requirements of the relevant IAEA regulations and other relevant national regulations. It is also recognized that countries may enact statutory regulations which specify exemptions for tests, according to sealed source type, design, working environment, and activity (e.g., for very low activity reference sources where the total activity is less than the leakage test limit).

Ämnesområden: Klyvbara material
Kommittébeteckning: SIS/TK 405 (Kärnenergi)
Källa: ISO
Svarsdatum: den 30 apr 2019
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This method covers the determination of Gd2O3 content in sintered UO2 fuel pellets, by X-ray fluorescence spectrometry.

Either Wave Dispersion X-ray Fluorescence (WD-XRF) or Energy Dispersion X-ray Fluorescence (ED-XRF) is applicable, however, this International Standard states a method by using WD-XRF using Gd Lα-line.

This method has been tested for mass fractions of from 2 % to 10 % Gd2O3.