CHAPTER II: ILLINOIS EMERGENCY MANAGEMENT AGENCY
SUBCHAPTER b: RADIATION PROTECTION
PART 346 LICENSES AND RADIATION SAFETY REQUIREMENTS FOR IRRADIATORS
SECTION 346.210 PERFORMANCE CRITERIA FOR SEALED SOURCES
Section 346.210 Performance Criteria for Sealed Sources
a) Requirements. Sealed sources installed after December 1, 2005:
1) Shall have an evaluation sheet issued by the Agency, an Agreement State, a Licensing State or the U.S. Nuclear Regulatory Commission;
2) Shall be doubly encapsulated;
3) Shall 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. Cs-137 sources are prohibited from use in a wet-source-storage or wet-source-change irradiator;
4) Shall 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;
5) In prototype testing of the sealed source, shall have been leak tested and found leak-free after each of the tests described in subsections (b) through (g) of this Section.
b) Temperature. The test source shall be held at -40șC for 20 minutes, 600șC for one hour, and then be subjected to a thermal shock test with a temperature drop from 600șC to 20șC within 15 seconds.
c) Pressure. The test source shall 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, shall be dropped from a height of 1 meter onto the test source.
e) Vibration. The test source shall 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 shall be vibrated for 30 minutes at each resonant frequency found.
f) Puncture. A 50-gram weight and pin (0.3-centimeter pin diameter) shall 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 shall be subjected to a force of 2000 newtons at its center, equidistant from the two support cylinders, the distance between which is 10 times the minimum cross-sectional dimension of the source.