180 NAC 19-007. PERFORMANCE CRITERIA FOR SEALED SOURCES

007. PERFORMANCE CRITERIA FOR SEALED SOURCES. 007.01 INSTALLATION DATE. Sealed sources installed after October 30, 1996 must: (A) Have a certificate of registration issued under the U. S. Nuclear Regulatory Commission (NRC) or an Agreement State for evaluation of radiation safety information about its product.(B) Be doubly encapsulated;(C) Use radioactive material that is as nondispersible as practical and as insoluble as practical if the source is used in a wet-source-storage or wet-source-change irradiator;(D) 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 sources are for use in irradiator pools; and(E) Have been leak tested and found leak-free after each test described in 180 NAC 19-007.02 through 19-007.07 in prototype testing of the sealed source. 007.02 TEMPERATURE. The test source must be held at -40° celsius for 20 minutes, 600° celsius for one hour, and then be subjected to a thermal shock test with a temperature drop from 600° celsius to 20° celsius within 15 seconds. 007.03 PRESSURE. The test source must be twice subjected for at least five minutes to an external absolute pressure of two million newtons per square meter. 007.04 IMPACT. A 2-kilogram steel weight, 2.5 centimeters in diameter, must be dropped from a height of 1 meter onto the test source. 007.05 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. 007.06 PUNCTURE. A 50-gram weight and pin, 0.3-centimeter pin diameter, must be dropped from a height of one meter onto the test source. 007.07 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 two thousand newtons at its center equidistant from two support cylinders, the distance between which is ten times the minimum cross-sectional dimension of the source.