[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: 10CFR39.55] [Page 633] 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. 39.55 Tritium neutron generator target sources. (a) Use of a tritium neutron generator target source, containing quantities not exceeding 1,110 GBg [30 curies] and in a well with a surface casing to protect fresh water aquifers, is subject to the requirements of this part except Sec. Sec. 39.15, 39.41, and 39.77. (b) Use of a tritium neutron generator target source, containing quantities exceeding 1,110 GBg [30 curies] or in a well without a surface casing to protect fresh water aquifers, is subject to the requirements of this part except Sec. 39.41. [68 FR 75390, Dec. 31, 2003] [[Page 634]]