[Code of Federal Regulations]
[Title 10, Volume 1]
[Revised as of January 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 10CFR39.41]

[Page 632]
 
                            TITLE 10--ENERGY
 
                CHAPTER I--NUCLEAR REGULATORY COMMISSION
 
PART 39--LICENSES AND RADIATION SAFETY REQUIREMENTS FOR WELL LOGGING
--Table of Contents
 
                          Subpart C--Equipment
 
Sec. 39.41  Design and performance criteria for sources.

    (a) A licensee may use a sealed source for use in well logging 
applications if --
    (1) The sealed source is doubly encapsulated;
    (2) The sealed source contains licensed material whose chemical and 
physical forms are as insoluble and nondispersible as practical; and
    (3) Meets the requirements of paragraph (b), (c), or (d) of this 
section.
    (b) For a sealed source manufactured on or before July 14, 1989, a 
licensee may use the sealed source, for use in well logging applications 
if it meets the requirements of USASI N5.10-1968, ``Classification of 
Sealed Radioactive Sources,'' or the requirements in paragraph (c) or 
(d) of this section.
    (c) For a sealed source manufactured after July 14, 1989, a licensee 
may use the sealed source, for use in well logging applications if it 
meets the oil-well logging requirements of ANSI/HPS N43.6-1997, ``Sealed 
Radioactive Sources--Classification.''
    (d) For a sealed source manufactured after July 14, 1989, a licensee 
may use the sealed source, for use in well logging applications, if--
    (1) The sealed source's prototype has been tested and found to 
maintain its integrity after each of the following tests:
    (i) Temperature. The test source must be held at -40 
C for 20 minutes, 600 C for 1 hour, and 
then be subject to a thermal shock test with a temperature drop from 600 
C to 20 C within 15 seconds.
    (ii) Impact test. A 5 kg steel hammer, 2.5 cm in diameter, must be 
dropped from a height of 1 m onto the test source.
    (iii) Vibration test. The test source must be subject to a vibration 
from 25 Hz to 500 Hz at 5 g amplitude for 30 minutes.
    (iv) Puncture test. A 1 gram hammer and pin, 0.3 cm pin diameter, 
must be dropped from a height of 1 m onto the test source.
    (v) Pressure test. The test source must be subject to an external 
pressure of 1.695 x 10\7\ pascals [24,600 pounds per square inch 
absolute].
    (e) The requirements in paragraphs (a), (b), (c), and (d) of this 
section do not apply to sealed sources that contain licensed material in 
gaseous form.
    (f) The requirements in paragraphs (a), (b), (c), and (d) of this 
section do not apply to energy compensation sources (ECS). ECSs must be 
registered with the Commission under Sec. 32.210 of this chapter or 
with an Agreement State.

[65 FR 20345, Apr. 17, 2000]