N.M. Admin. Code § 20.3.15.1506

Current through Register Vol. 35, No. 21, November 5, 2024

Section 20.3.15.1506 - PERFORMANCE CRITERIA FOR SEALED SOURCES

A. Requirements. Sealed sources installed after July 1, 1993:

(1) must be doubly encapsulated;

(2) must use radioactive material that is as non-dispersible as practical and that is as insoluble as practical if the source is used in a wet-source-storage or wet-source-change irradiator;

(3) 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

(4) in prototype testing of the sealed source, must have been leak tested and found leak-free after each of the tests described in Subsections B through G of 20.3.15.1506 NMAC.

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

C.Pressure. The test source must be twice subjected for at least five 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.

N.M. Admin. Code § 20.3.15.1506

05/03/95; 20.3.15.1506 NMAC - Rn, 20 NMAC 3.1.15.1506, 4/15/2004, Amended by New Mexico Register, Volume XXVIII, Issue 11, June 13, 2017, eff. 6/13/2017