§ 36.21. Performance criteria for sealed sources.
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/us/cfr/t10/s§ 36.21·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
(a)Requirements. Sealed sources installed after July 1, 1993:
(1)Must have a certificate of registration issued under 10 CFR 32.210;
(2)Must be doubly encapsulated;
(3)Must use radioactive material that is as nondispersible as practical and that is as insoluble as practical if the source is used in a wet-source-storage or wet-source-change irradiator;
(4)Must be encapsulated in a material resistant to general corrosion and to localized corrosion, such as 316L stainless steel or other material with equivalent resistance if the sources are for use in irradiator pools; and
(5)In prototype testing of the sealed source, must have been leak tested and found leak-free after each of the tests described in paragraphs
(b)through
(g)of this section.
(b)Temperature. The test source must be held at −40 °C for 20 minutes, 600 °C for 1 hour, and then be subjected to a thermal shock test with a temperature drop from 600 °C to 20 °C within 15 seconds.
(c)Pressure. The test source must be twice subjected for at least 5 minutes to an external pressure (absolute) of 2 million newtons per square meter.
(d)Impact. A 2-kilogram steel weight, 2.5 centimeters in diameter, must be dropped from a height of 1 meter onto the test source.
(e)Vibration. The test source must be subjected 3 times for 10 minutes each to vibrations sweeping from 25 hertz to 500 hertz with a peak amplitude of 5 times the acceleration of gravity. In addition, each test source must be vibrated for 30 minutes at each resonant frequency found.
(f)Puncture. A 50-gram weight and pin, 0.3-centimeter pin diameter, must be dropped from a height of 1 meter onto the test source.
(g)Bend. If the length of the source is more than 15 times larger than the minimum cross-sectional dimension, the test source must be subjected to a force of 2000 newtons at its center equidistant from two support cylinders, the distance between which is 10 times the minimum cross-sectional dimension of the source.
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§ 36.21
Performance criteria for sealed sources.
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