OAR 333-121-0100
Performance Criteria for Sealed Sources


Requirements for sealed sources installed after September 1, 2002:


Must have been evaluated in accordance with 10 CFR 32.210 or the equivalent state regulation;


Must be doubly encapsulated;


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;


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


In prototype testing of the sealed source, must have been leak tested and found leak-free after each of the tests described in OAR 333-121-0100 (Performance Criteria for Sealed Sources)(2) through 333-121-0100 (Performance Criteria for Sealed Sources)(7) of this rule.


Temperature. The test source must be held at -40oC for 20 minutes, 600oC for one hour, and then be subjected to thermal shock test with a temperature drop from 600oC to 20oC within 15 seconds.


Pressure. The test source must be twice subjected for at least five minutes to an absolute external pressure of 2 million newtons per square meter.


Impact. A 2 kilogram steel weight, 2.5 centimeters in diameter, must be dropped from a height of 1 meter onto the test source.


Vibration. The test source must be subjected three times for ten minutes each to vibrations sweeping from 25 hertz to 500 hertz with a peak amplitude of five times the acceleration of gravity. In addition, each test source must be vibrated for 30 minutes at each resonant frequency found.


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.


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 ten times the minimum cross-sectional dimension of the source.

Source: Rule 333-121-0100 — Performance Criteria for Sealed Sources, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=333-121-0100.

Last Updated

Jun. 8, 2021

Rule 333-121-0100’s source at or​.us