; and (2) $20,000,000 for fiscal year 2019. . (2) Conforming amendment The table of contents for subtitle G of title IX of the Energy Policy Act of 2005 is amended by inserting after the item relating to section 977 the following: 977A. Low-dose radiation research program. . (e) Limitation for research funds The Director shall not approve new climate science-related initiatives without making a determination that such work is well-coordinated with any relevant work carried out by other Federal agencies. 8. Fusion energy (a) Program The Director shall carry out a fusion energy sciences research program to expand the understanding of plasmas and matter at very high temperatures and densities and build the science and engineering foundation needed to develop a fusion energy source. (b) Inertial fusion energy research and development program The Secretary shall carry out a program of research and technology development in inertial fusion for energy applications, including ion beam, laser, and pulsed power fusion systems. (c) Tokamak research and development (1) In general The Director shall support research and development activities and facility operations to optimize the tokamak approach to fusion energy. (2) International thermonuclear experimental reactor construction Section 972 of the Energy Policy Act of 2005 ( 42 U.S.C. 16312 ) is amended by adding section the following new paragraph: (6) ITER construction (A) In general There is authorized United States participation in the construction and operations of the ITER project, as agreed to under the April 25, 2007 Agreement on the Establishment of the ITER International Fusion Energy Organization for the Joint Implementation of the ITER Project. . (B) Facility requirements The Secretary shall ensure that the mission-oriented user facility will enable the study of a burning plasma, and shall be built to have the following characteristics in its full configuration: (i) A tokamak device with a plasma radius of 6.2 meters and a magnetic field of 5.3 T. (ii) Capable