NAC459.7685. Criteria for design and performance of sealed sources.

     1. Except as otherwise provided in subsection 2, a licensee shall not use a sealed source in well logging unless the sealed source:

     (a) Is doubly encapsulated;

     (b) Contains radioactive material whose chemical and physical forms are as insoluble and nondispersible as practical; and

     (c) Has been tested as a prototype and found to maintain its integrity after:

          (1) A temperature test in which the prototype is subjected to -40 degrees C for 20 minutes and is subjected to 600 degrees C for 1 hour and then is subjected to a thermal shock test in which the prototype is subjected to a temperature drop from 600 degrees C to 20 degrees C within 15 seconds;

          (2) An impact test in which a 5 kg steel hammer measuring 2.5 cm in diameter is dropped from a height of 1 m onto the prototype;

          (3) A vibration test in which the prototype is subjected to a vibration ranging from 25 Hz to 500 Hz at 5 g amplitude for 30 minutes;

          (4) A puncture test in which a 1 gram hammer attached to pin measuring 0.3 cm in diameter is dropped from a height of 1 m onto the prototype; and

          (5) A pressure test in which the prototype is subjected to an external pressure of 24,600 pounds per square inch absolute.

     2. The requirements of subsection 1 do not apply to sealed sources that contain radioactive material in gaseous form.

     (Added to NAC by Bd. of Health, eff. 9-6-88)