[Code of Federal Regulations]
[Title 10, Volume 1]
[Revised as of January 1, 2001]
From the U.S. Government Printing Office via GPO Access
[CITE: 10CFR36.21]

[Page 589]
 
                            TITLE 10--ENERGY
 
                CHAPTER I--NUCLEAR REGULATORY COMMISSION
 
PART 36--LICENSES AND RADIATION SAFETY REQUIREMENTS FOR IRRADIATORS--Table of Contents
 
     Subpart C--Design and Performance Requirements for Irradiators
 
Sec. 36.21  Performance criteria for sealed sources.


    (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  deg.C for 20 
minutes, 600  deg.C for 1 hour, and then be subjected to a thermal shock 
test with a temperature drop from 600  deg.C to 20  deg.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.