HPS - ANSI/HPS N43.6
Sealed Radioactive Sources – Classification
|Publication Date:||1 January 2007|
This standard establishes a system of classification for sealed radioactive sources based on performance specifications related to radiation safety. It does not consider the radiation output of the sealed source.
The standard provides a manufacturer of sealed radioactive sources with a set of tests to evaluate the safety of its products under specified conditions, and also to assist a user of such sources to select types that suit an application, especially where protection against radioactive contamination is concerned. This standard also provides guidance to regulatory authorities.
The tests fall into several groups, including, for example, exposure to abnormally high and low temperature and a variety of mechanical tests. Each test can be applied in several degrees of severity.
Although the standard classifies sealed sources by a variety of tests, it does not imply that a sealed source will maintain its integrity if used continuously at the rated classification. For example, a sealed source tested for one hour at 600°C (1112°F) may or may not maintain its integrity if used continuously at 600°C (1112°F).
Table 4 of this standard includes a list, which is not intended to be comprehensive, of typical applications of sealed radioactive sources with a suggested performance classification for each application. These classifications are minimum requirements corresponding to the applications in the usual environment. Factors to be considered for applications in especially severe environments are listed in Sections 4.2 and 4.3.
This standard makes no attempt to classify the design of sources, their method of construction, or their calibration in terms of the radiation emitted.
Several subjects relating to sealed sources and their testing are not treated in detail in this standard, including selected brachytherapy sources, self-luminous light sources and IAEA tests for special-form radioactive material. These subjects are covered by separate standards as listed in Section 4.4.