---
kind: "section"
citation: "42 U.S.C. § 18645"
title: "42"
title_heading: "The Public Health and Welfare"
number: "18645"
heading: "Fusion energy"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/42/18645"
units:
  - "Chapter 161 — Department of Energy Research and Innovation"
  - "Subchapter III — Department of Energy Office of Science Policy"
---

# §18645. Fusion energy

- (a) **Program—** As part of the activities authorized under [section 7139 of this title](/usc/42/7139.md) and [section 16312 of this title](/usc/42/16312.md), the [Director](/usc/42/18601.md?p=2) shall carry out a fusion energy sciences research and enabling technology development program to effectively address the scientific and engineering challenges to building a cost competitive fusion power plant and to support the development of a competitive fusion power industry in the United States. As part of this program, the [Director](/usc/42/18601.md?p=2) shall carry out research activities to expand the fundamental understandings of plasma and matter at very high temperatures and densities for fusion applications and for other engineering and plasma science applications.
- (b) **Fusion materials research and development—**
  - (1) **In general—** As part of the activities authorized in [section 16318 of this title](/usc/42/16318.md)—
    - (A) the [Director](/usc/42/18601.md?p=2), in coordination with the Assistant [Secretary](/usc/42/18601.md?p=4) for Nuclear Energy of the [Department](/usc/42/18601.md?p=1), shall carry out research and development activities to identify, characterize, and demonstrate materials that can endure the neutron, plasma, and heat fluxes expected in a fusion power system; and
    - (B) the [Director](/usc/42/18601.md?p=2) shall provide an assessment of—
      - (i) the need for one or more facilities that can examine and test potential fusion and next generation fission materials and other enabling technologies relevant to the development of fusion power; and
      - (ii) whether a single new facility that substantially addresses magnetic fusion and next generation fission materials research needs is feasible, in conjunction with the expected capabilities of facilities operational as of September 28, 2018.
  - (2) **Authorization of appropriations—** Out of funds authorized to be appropriated under [subsection (q)](#q),[^1] there is authorized to be appropriated to the [Secretary](/usc/42/18601.md?p=4) to carry out activities described in [paragraph (1)](#b-1) $50,000,000 for each of fiscal years 2023 through 2027.
- (c) **Tokamak research and development—** The [Director](/usc/42/18601.md?p=2) shall support research and development activities and facility operations to optimize the tokamak approach to fusion energy.
- (d) **Inertial fusion research and development—**
  - (1) **In general—** The [Director](/usc/42/18601.md?p=2) 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.
  - (2) **Activities—** As part of the program described in [paragraph (1)](#d-1), the [Director](/usc/42/18601.md?p=2) shall support activities at and partnerships with universities and the [National Laboratories](/usc/42/18601.md?p=3) to—
    - (A) develop novel target designs;
    - (B) support modeling of various inertial fusion energy concepts and systems;
    - (C) develop diagnostic tools; and
    - (D) improve inertial fusion energy driver technologies.
  - (3) **Authorization of appropriations—** Out of funds authorized to be appropriated under [subsection (q)](#q),[^1] there are authorized to be appropriated to the [Secretary](/usc/42/18601.md?p=4) to carry out the activities described in this subsection $25,000,000 for each of fiscal years 2021 through 2027.
- (e) **Alternative and enabling concepts—**
  - (1) **In general—** The [Director](/usc/42/18601.md?p=2) shall support research and development activities and facility operations at institutions of higher education, [National Laboratories](/usc/42/18601.md?p=3), and private facilities in the United States for a portfolio of alternative and enabling fusion energy concepts that may provide solutions to significant challenges to the establishment of a commercial magnetic fusion power plant, prioritized based on the ability of the United States to play a leadership role in the international fusion research community.
  - (2) **Activities—** Fusion energy concepts and activities explored under [paragraph (1)](#e-1) may include—
    - (A) alternative fusion energy concepts, including—
      - (i) advanced stellarator concepts;
      - (ii) non-tokamak confinement configurations operating at low magnetic fields;
      - (iii) magnetized target fusion energy concepts; or
      - (iv) other promising fusion energy concepts identified by the [Director](/usc/42/18601.md?p=2);
    - (B) enabling fusion technology development activities, including—
      - (i) high magnetic field approaches facilitated by high temperature superconductors;
      - (ii) liquid metals to address issues associated with fusion plasma interactions with the inner wall of the encasing device; and
      - (iii) advanced blankets for heat management and fuel breeding; and
    - (C) advanced scientific computing activities.
  - (3) **Innovation network for fusion energy—**
    - (A) **In general—** The [Secretary](/usc/42/18601.md?p=4), acting through the Office of Science, shall support a program to provide fusion energy researchers with access to scientific and technical resources and expertise at facilities supported by the [Department](/usc/42/18601.md?p=1), including such facilities at [National Laboratories](/usc/42/18601.md?p=3) and universities, to advance innovative fusion energy technologies toward commercial application.
    - (B) **Awards—** Financial assistance under the program established in [subsection (a)](#a)—
      - (i) shall be awarded on a competitive, merit-reviewed basis; and
      - (ii) may be in the form of grants, vouchers, equipment loans, or contracts to private entities.
  - (4) **Authorization of appropriations—** Out of funds authorized to be appropriated under [subsection (q)](#q),[^1] there are authorized to be appropriated to the [Secretary](/usc/42/18601.md?p=4) to carry out the activities described in this subsection $50,000,000 for each of fiscal years 2021 through 2027.
- (f) **Coordination with ARPA–E—** The [Director](/usc/42/18601.md?p=2) shall coordinate with the [Director](/usc/42/18601.md?p=2) of the Advanced Research [Projects](/usc/42/13641.md?p=2) [Agency](/usc/42/8262.md?p=1)-Energy (referred to in this subsection as “ARPA–E”) to—
  - (1) assess the potential for any fusion energy [project](/usc/42/13641.md?p=2) supported by ARPA–E to represent a promising approach to a commercially viable fusion power plant;
  - (2) determine whether the results of any fusion energy [project](/usc/42/13641.md?p=2) supported by ARPA–E merit the support of follow-on research activities carried out by the Office of Science; and
  - (3) avoid the unintentional duplication of activities.
- (g) **Omitted—**
- (h) **Identification of priorities—**
  - (1) **Report—**
    - (A) **In general—** Not later than 2 years after September 28, 2018, the [Secretary](/usc/42/18601.md?p=4) shall submit to Congress a report on the fusion energy research and development activities that the [Department](/usc/42/18601.md?p=1) proposes to carry out over the 10-year period following the date of the report under not fewer than 3 realistic budget scenarios, including a scenario based on 3-percent annual growth in the non-ITER portion of the budget for fusion energy research and development activities.
    - (B) **Inclusions—** The report required under [subparagraph (A)](#h-1-A) shall—
      - (i) identify specific areas of fusion energy research and enabling technology development in which the United States can and should establish or solidify a lead in the global fusion energy development effort;
      - (ii) identify priorities for initiation of facility [construction](/usc/42/300s–3.md?p=7) and facility decommissioning under each of the three budget scenarios described in [subparagraph (A)](#h-1-A); and
      - (iii) assess the ability of the fusion workforce of the United States to carry out the activities identified under clauses [(i)](#h-1-B-i) and [(ii)](#h-1-B-ii), including the adequacy of programs at institutions of higher education in the United States to train the leaders and workers of the next generation of fusion energy researchers.
  - (2) **Process—** In order to develop the report required under [paragraph (1)(A)](#h-1-A), the [Secretary](/usc/42/18601.md?p=4) shall leverage best [practices](/usc/42/17061.md?p=19) and lessons learned from the process used to develop the most recent report of the Particle Physics [Project](/usc/42/13641.md?p=2) Prioritization Panel of the High Energy Physics Advisory Panel.
  - (3) **Requirement—** No member of the Fusion Energy Sciences [Advisory Committee](/usc/42/17061.md?p=2) shall be excluded from participating in developing or voting on final approval of the report required under [paragraph (1)(A)](#h-1-A).
- (i) **Milestone-based development program—**
  - (1) **In general—** Using the authority of the [Secretary](/usc/42/18601.md?p=4) under [section 7256(g) of this title](/usc/42/7256.md?p=g), notwithstanding [paragraph (10)](/usc/42/7256.md?p=g-10) of such section, the [Secretary](/usc/42/18601.md?p=4) shall establish, not later than 6 months after the date of enactment of this section, a milestone-based fusion energy development program that requires [projects](/usc/42/13641.md?p=2) to meet particular technical milestones before a participant is awarded funds by the [Department](/usc/42/18601.md?p=1).
  - (2) **Purpose—** The purpose of the program established by [paragraph (1)](#i-1) shall be to support the development of a U.S.-based fusion power industry through the research and development of technologies that will enable the [construction](/usc/42/300s–3.md?p=7) of new full-scale fusion systems capable of demonstrating significant improvements in the performance of such systems, as defined by the [Secretary](/usc/42/18601.md?p=4), within 10 years of the enactment of this section.
  - (3) **Eligibility—** Any entity is eligible to participate in the program provided that the [Secretary](/usc/42/18601.md?p=4) has deemed it as having the necessary resources and expertise.
  - (4) **Requirements—** In carrying out the milestone-based program under [paragraph (1)](#i-1), the [Secretary](/usc/42/18601.md?p=4) shall, for each relevant [project](/usc/42/13641.md?p=2)—
    - (A) request proposals from eligible entities, as determined by the [Secretary](/usc/42/18601.md?p=4), that include proposed technical milestones, including estimated [project](/usc/42/13641.md?p=2) timelines and total costs;
    - (B) set milestones based on a rigorous technical review process;
    - (C) award funding of a predetermined amount to [projects](/usc/42/13641.md?p=2) that successfully meet proposed milestones under [paragraph (1)](#i-1), or for expenses deemed reimbursable by the [Secretary](/usc/42/18601.md?p=4), in accordance with terms negotiated for an individual award; and
    - (D) communicate regularly with selected eligible entities and, if the [Secretary](/usc/42/18601.md?p=4) deems appropriate, exercise small amounts of flexibility for technical milestones as [projects](/usc/42/13641.md?p=2) mature.
  - (5) **Awards—** For the program established under [paragraph (1)](#i-1)—
    - (A) an award recipient shall be responsible for all costs until milestones are achieved, or reimbursable expenses are reviewed and verified by the [Department](/usc/42/18601.md?p=1);
    - (B) should an awardee not meet the milestones described in [paragraph (4)](#i-4), the [Secretary](/usc/42/18601.md?p=4) may end the partnership with an award recipient and use the remaining funds in the ended agreement for new or existing [projects](/usc/42/13641.md?p=2) carried out under this section; and
    - (C) consistent with the existing authorities of the [Department](/usc/42/18601.md?p=1), the [Secretary](/usc/42/18601.md?p=4) may end the partnership with an award recipient for cause during the performance period.
  - (6) **Applications—** Any [project](/usc/42/13641.md?p=2) proposal submitted to the program under [paragraph (1)](#i-1) shall be evaluated based upon its scientific, technical, and business merits through a peer-review process, which shall include reviewers with appropriate expertise from the private sector, the investment community, and experts in the science and engineering of fusion and plasma physics.
  - (7) **Project management—** In carrying out [projects](/usc/42/13641.md?p=2) under this program and assessing the completion of their milestones in accordance with [paragraph (4)](#i-4), the [Secretary](/usc/42/18601.md?p=4) shall consult with experts that represent diverse perspectives and professional experiences, including those from the private sector, to ensure a complete and thorough review.
  - (8) **Programmatic review—** Not later than 4 years after the [Secretary](/usc/42/18601.md?p=4) has established 3 milestones under this program, the [Secretary](/usc/42/18601.md?p=4) shall enter into a contractual arrangement with the National Academy of Sciences to review and provide a report describing the findings of this review to the House Committee on Science, Space, and Technology and the Senate Committee on Energy and Natural Resources on the program established under this [paragraph (1)](#i-1) that assesses—
    - (A) the benefits and drawbacks of a milestone-based fusion program as compared to traditional program structure funding models at the [Department](/usc/42/18601.md?p=1);
    - (B) lessons-learned from program operations; and
    - (C) any other matters the [Secretary](/usc/42/18601.md?p=4) determines regarding the program.
  - (9) **Annual report—** As part of the annual budget request submitted for each fiscal year, the [Secretary](/usc/42/18601.md?p=4) shall provide the House Committee on Science, Space, and Technology and the Senate Committee on Energy and Natural Resources a report describing partnerships supported by the program established under [paragraph (1)](#i-1) during the previous fiscal year.
  - (10) **Authorization of appropriations—** Out of funds authorized to be appropriated under [subsection (q)](#q),[^1] there are authorized to be appropriated to the [Secretary](/usc/42/18601.md?p=4) to carry out the activities described in this subsection, to remain available until expended—
    - (A) $45,000,000 for fiscal year 2021;
    - (B) $65,000,000 for fiscal year 2022;
    - (C) $105,000,000 for fiscal year 2023;
    - (D) $65,000,000 for fiscal year 2024;
    - (E) $45,000,000 for fiscal year 2025;
    - (F) $45,000,000 for fiscal year 2026; and
    - (G) $45,000,000 for fiscal year 2027.
- (j) **Fusion reactor system design—**
  - (1) **In general—** Not later than 180 days after August 9, 2022, the [Director](/usc/42/18601.md?p=2) shall establish not less than 2 national teams described in [paragraph (2)](#j-2) that shall—
    - (A) develop conceptual pilot plant designs and technology roadmaps; and
    - (B) create an engineering design of a pilot plant that will bring fusion to commercial viability.
  - (2) **National teams—** A national team referred to in [paragraph (1)](#j-1) shall—
    - (A) be composed of developers, manufacturers, universities, [National Laboratories](/usc/42/18601.md?p=3), and representatives of the engineering, procurement, and [construction](/usc/42/300s–3.md?p=7) industries; and
    - (B) include public-private partnerships.
  - (3) **Authorization of appropriations—** Of the funds authorized to be appropriated for Fusion Energy Sciences in a fiscal year, there are authorized to be appropriated to the [Secretary](/usc/42/18601.md?p=4) to carry out this subsection—
    - (A) $35,000,000 for fiscal year 2023;
    - (B) $50,000,000 for fiscal year 2024;
    - (C) $65,000,000 for fiscal year 2025;
    - (D) $80,000,000 for fiscal year 2026; and
    - (E) $80,000,000 for fiscal year 2027.
- (k) **General plasma science and applications—** The [Director](/usc/42/18601.md?p=2) shall support research in general plasma science and high energy density physics that advance the understanding of the scientific community of fundamental properties and complex behavior of matter to control and manipulate plasmas for a broad range of applications, including support for research relevant to advancements in chip manufacturing and microelectronics.
- (l) **Sense of Congress—** It is the sense of Congress that the United States should support a robust, diverse program in addition to providing sufficient support to, at a minimum, meet its commitments to ITER and maintain the schedule of the [project](/usc/42/13641.md?p=2) as determined by the [Secretary](/usc/42/18601.md?p=4) in coordination with the ITER Organization at the time of the enactment of this section. It is further the sense of Congress that developing the scientific basis for fusion, providing research results key to the success of ITER, and training the next generation of fusion scientists are of critical importance to the United States and should in no way be diminished by participation of the United States in the ITER [project](/usc/42/13641.md?p=2).
- (m) **International collaboration—** The [Director](/usc/42/18601.md?p=2) shall—
  - (1) as practicable and in coordination with other appropriate Federal [agencies](/usc/42/8262.md?p=1) as necessary, ensure the access of United States researchers to the most advanced fusion research facilities and research capabilities in the world, including ITER;
  - (2) to the maximum extent practicable, continue to leverage United States participation ITER,[^2] and prioritize expanding international partnerships and investments in current and future fusion research facilities within the United States; and
  - (3) to the maximum extent practicable, prioritize engagement in collaborative efforts in support of future international facilities that would provide access to the most advanced fusion research facilities in the world to United States researchers.
- (n) **Fission and fusion research coordination report—**
  - (1) **In general—** Not later than 6 months after the date of enactment of this section, the [Secretary](/usc/42/18601.md?p=4) shall transmit to Congress a report addressing opportunities for coordinating fusion energy research and development activities between the Office of Nuclear Energy, the Office of Science, and the Advanced Research [Projects](/usc/42/13641.md?p=2) [Agency](/usc/42/8262.md?p=1)—Energy.
  - (2) **Components—** The report shall assess opportunities for collaboration on research and development of—
    - (A) liquid metals to address issues associated with fusion plasma interactions with the inner wall of the encasing device and other components within the reactor;
    - (B) immersion blankets for heat management and fuel breeding;
    - (C) technologies and methods for instrumentation and control;
    - (D) computational methods and codes for system operation and maintenance;
    - (E) codes and standard development;
    - (F) radioactive waste handling;
    - (G) radiological safety;
    - (H) potential for non-electricity generation applications; and
    - (I) any other overlapping priority as identified by the [Director](/usc/42/18601.md?p=2) of the Office of Science or the Assistant [Secretary](/usc/42/18601.md?p=4) of Energy for Nuclear Energy.
- (o) **High-performance computation collaborative research program—**
  - (1) **In general—** The [Secretary](/usc/42/18601.md?p=4) shall carry out a program to conduct and support collaborative research, development, and demonstration of fusion energy technologies, through high-performance computation modeling and simulation techniques, in order—
    - (A) to support fundamental research in plasmas and matter at very high temperatures and densities;
    - (B) to inform the development of a broad range of fusion energy systems; and
    - (C) to facilitate the translation of research results in fusion energy science to industry.
  - (2) **Coordination—** In carrying out the program under [paragraph (1)](#o-1), the [Secretary](/usc/42/18601.md?p=4) shall coordinate with relevant Federal [agencies](/usc/42/8262.md?p=1), and prioritize the following objectives:
    - (A) To use expertise from the private sector, institutions of higher education, and the [National Laboratories](/usc/42/18601.md?p=3) to leverage existing, and develop new, computational software and capabilities that prospective users may use to accelerate research and development of fusion energy systems.
    - (B) To develop computational tools to simulate and predict fusion energy science phenomena that may be validated through physical experimentation.
    - (C) To increase the utility of the research infrastructure of the [Department](/usc/42/18601.md?p=1) by coordinating with the Advanced Scientific Computing Research program within the Office of Science.
    - (D) To leverage experience from existing modeling and simulation entities sponsored by the [Department](/usc/42/18601.md?p=1).
    - (E) To ensure that new experimental and computational tools are accessible to relevant research communities, including private sector entities engaged in fusion energy technology development.
    - (F) To ensure that newly developed computational tools are compatible with modern virtual engineering and visualization capabilities to accelerate the realization of fusion energy technologies and systems.
  - (3) **Duplication—** The [Secretary](/usc/42/18601.md?p=4) shall ensure the coordination of, and avoid unnecessary duplication of, the activities of the program under [paragraph (1)](#o-1) with the activities of—
    - (A) other research entities of the [Department](/usc/42/18601.md?p=1), including the [National Laboratories](/usc/42/18601.md?p=3), the Advanced Research [Projects](/usc/42/13641.md?p=2) [Agency](/usc/42/8262.md?p=1)—Energy, and the Advanced Scientific Computing Research program within the Office of Science; and
    - (B) industry.
  - (4) **High-Performance Computing for Fusion Innovation Center—**
    - (A) **In general—** In carrying out the program under [paragraph (1)](#o-1), the [Secretary](/usc/42/18601.md?p=4) shall, in coordination with the Innovation Network for Fusion Energy, establish and operate a national High-Performance Computing for Fusion Innovation Center (referred to in this paragraph as the “Center”), to support the program under [paragraph (1)](#o-1) by providing, to the extent practicable, a centralized entity for multidisciplinary, collaborative, fusion energy research and development through high-performance computing and advanced data analytics technologies and processes.
    - (B) **Eligible entities—** An entity eligible to serve as the Center shall be—
      - (i) a [National Laboratory](/usc/42/18601.md?p=3);
      - (ii) an [institution of higher education](/usc/42/11851.md?p=7);
      - (iii) a multi-institutional collaboration; or
      - (iv) any other entity that the [Secretary](/usc/42/18601.md?p=4) determines to be appropriate.
    - (C) **Application; selection—**
      - (i) **Application—** To be eligible to serve as the Center, an eligible entity shall submit to the [Secretary](/usc/42/18601.md?p=4) an application at such time, in such manner, and containing such information as the [Secretary](/usc/42/18601.md?p=4) may require.
      - (ii) **Selection—** The [Secretary](/usc/42/18601.md?p=4) shall select the Center on a competitive, merit-reviewed basis.
    - (D) **Existing activities—** The Center may incorporate existing research activities that are consistent with the program under [paragraph (1)](#o-1).
    - (E) **Priorities—**
      - (i) **In general—** The Center shall prioritize activities that utilize expertise and infrastructure from a balance among the private sector, institutions of higher education, and the [National Laboratories](/usc/42/18601.md?p=3) to enhance existing computation tools and develop new computational software and capabilities to accelerate the commercial application of fusion energy systems.
      - (ii) **Maintenance of resource availability—** The [Secretary](/usc/42/18601.md?p=4) may enter into contracts with commercial cloud computing providers to ensure that resource availability within the [Department](/usc/42/18601.md?p=1) is not reduced or disproportionately distributed as a result of Center activities.
    - (F) **Duration—** Subject to [subparagraph (G)](#o-4-G), the Center shall receive support for a period of not more than 5 years, subject to the availability of appropriations.
    - (G) **Renewal—** On the expiration of the period of support of the Center under [subparagraph (F)](#o-4-F), the [Secretary](/usc/42/18601.md?p=4) may renew support for the Center, on a merit-reviewed basis, for a period of not more than 5 years.
- (p) **Material Plasma Exposure Experiment—**
  - (1) **In general—** The [Secretary](/usc/42/18601.md?p=4) shall construct a Material Plasma Exposure Experiment facility as described in the 2020 publication approved by the Fusion Energy Sciences [Advisory Committee](/usc/42/17061.md?p=2) entitled “Powering the Future: Fusion and Plasmas”. The [Secretary](/usc/42/18601.md?p=4) shall consult with the private sector, institutions of higher education, [National Laboratories](/usc/42/18601.md?p=3), and relevant Federal [agencies](/usc/42/8262.md?p=1) to ensure that the facility is capable of meeting Federal research needs for steady [state](/usc/42/2021b.md?p=14), high-heat-flux, and plasma-material interaction testing of fusion materials over a range of fusion energy relevant parameters.
  - (2) **Facility capabilities—** The [Secretary](/usc/42/18601.md?p=4) shall ensure that the facility described in [paragraph (1)](#p-1) will provide the following capabilities:
    - (A) A magnetic field at the target of 1 Tesla.
    - (B) An energy flux at the target of 10 MW/m[^2].
    - (C) The ability to expose previously irradiated plasma facing material samples to plasma.
  - (3) **Start of operations—** The [Secretary](/usc/42/18601.md?p=4) shall, subject to the availability of appropriations, ensure that the start of full operations of the facility described in [paragraph (1)](#p-1) occurs before December 31, 2027.
  - (4) **Funding—** Of the funds authorized to be appropriated for Fusion Energy Sciences, there are authorized to be appropriated to the [Secretary](/usc/42/18601.md?p=4) for the Office of Fusion Energy Sciences to complete [construction](/usc/42/300s–3.md?p=7) of the facility described in [paragraph (1)](#p-1)—
    - (A) $21,895,000 for fiscal year 2023; and
    - (B) $3,800,000 for fiscal year 2024.
- (q) **Matter in Extreme Conditions instrument upgrade—**
  - (1) **In general—** The [Secretary](/usc/42/18601.md?p=4) shall provide for the upgrade to the Matter in Extreme Conditions endstation at the Linac Coherent Light Source as described in the 2020 publication approved by the Fusion Energy Sciences [Advisory Committee](/usc/42/17061.md?p=2) entitled “Powering the Future: Fusion and Plasmas”. The [Secretary](/usc/42/18601.md?p=4) shall consult with the private sector, institutions of higher education, [National Laboratories](/usc/42/18601.md?p=3), and relevant Federal [agencies](/usc/42/8262.md?p=1) to ensure that this facility is capable of meeting Federal research needs for understanding physical and chemical changes to plasmas at fundamental timescales, and explore new regimes of dense material physics, astrophysics, planetary physics, and short-pulse laser-plasma interactions.
  - (2) **Start of operations—** The [Secretary](/usc/42/18601.md?p=4) shall, subject to the availability of appropriations, ensure that the start of full operations of the facility described in [paragraph (1)](#q-1) occurs before December 31, 2028.
- (r) **Authorization of appropriations—** Out of funds authorized to be appropriated for the Office of Science in a fiscal year, there are authorized to be appropriated to the [Secretary](/usc/42/18601.md?p=4) to carry out the activities described in this section—
  - (1) $996,000,000 for fiscal year 2021;
  - (2) $921,000,000 for fiscal year 2022;
  - (3) $1,025,500,400 for fiscal year 2023;
  - (4) $1,043,489,724 for fiscal year 2024;
  - (5) $1,053,266,107 for fiscal year 2025;
  - (6) $1,047,962,074 for fiscal year 2026; and
  - (7) $1,114,187,798 for fiscal year 2027.

## Footnotes

[^1]: So in original. Probably should be “subsection (r),”. See References in Text note below.
[^2]: So in original.

## Source credit

(Pub. L. 115–246, title III, § 307, Sept. 28, 2018, 132 Stat. 3148; Pub. L. 116–260, div. Z, title II, § 2008(a), Dec. 27, 2020, 134 Stat. 2474; Pub. L. 117–167, div. B, title I, § 10105(a), Aug. 9, 2022, 136 Stat. 1441.)

## Notes

### Editorial Notes

### References in Text

Subsection (q), referred to in subsecs. (b)(2), (d)(3), (e)(4), and (i)(10), probably should be a reference to subsec. (r). Prior to amendment by Pub. L. 117–167, those references were to subsec. (o) of this section, which related to authorization of appropriations and was redesignated as subsec. (r) by Pub. L. 117–167, § 10105(a)(6). See 2022 Amendment notes below.

The date of enactment of this section, referred to in subsecs. (i)(1) and (n)(1), probably means the date of enactment of Pub. L. 116—260, which enacted subsecs. (i) and (n) of this section and was approved Dec. 27, 2020.

The enactment of this section, referred to in subsecs. (i)(2) and (l), probably means the enactment of Pub. L. 116—260, which enacted subsecs. (i) and (l) of this section and made other amendments to this section.

### Codification

Section is comprised of section 307 of Pub. L. 115–246. Subsec. (g) of section 307 of Pub. L. 115–246 amended section 2053 of this title.

### Amendments

2022—Subsec. (b). Pub. L. 117–167, § 10105(a)(1), designated existing provisions as par. (1), inserted heading, redesignated former pars. (1) and (2) as subpars. (A) and (B), respectively, of par. (1) and subpars. (A) and (B) of former par. (2) as cls. (i) and (ii), respectively, of subpar. (B) of par. (1), and added par. (2).

Subsec. (d)(3). Pub. L. 117–167, § 10105(a)(2), substituted “subsection (q)” for “subsection (o)”, “this subsection” for “subsection (d)”, and “2027” for “2025”.

Subsec. (e)(4). Pub. L. 117–167, § 10105(a)(3), substituted “subsection (q)” for “subsection (o)”, “this subsection” for “subsection (e)”, and “2027” for “2025”.

Subsec. (i)(10). Pub. L. 117–167, § 10105(a)(4)(A), substituted, in introductory provisions, “subsection (q)” for “subsection (o)” and “this subsection” for “subsection (i)”.

Subsec. (i)(10)(F), (G). Pub. L. 117–167, § 10105(a)(4)(B)–(D), added subpars. (F) and (G).

Subsec. (j). Pub. L. 117–167, § 10105(a)(5), added subsec. (j) and struck out former subsec. (j). Prior to amendment, text read as follows: “The Director shall support research and development activities to design future fusion reactor systems and examine and address the technical drivers for the cost of these systems.”

Subsecs. (o) to (q). Pub. L. 117–167, § 10105(a)(7), added subsecs. (o) to (q). Former subsec. (o) redesignated (r).

Subsec. (r). Pub. L. 117–167, § 10105(a)(6), (8)(A), redesignated subsec. (o) as (r) and substituted “Out of funds authorized to be appropriated for the Office of Science in a fiscal year, there” for “There” in introductory provisions.

Subsec. (r)(3) to (7). Pub. L. 117–167, § 10105(a)(8)(B), added pars. (3) to (7) and struck out former pars. (3) to (5) relating to appropriations for fiscal years 2023 to 2025, respectively.

2020—Subsec. (a). Pub. L. 116–260, § 2008(a)(2), added subsec. (a). Former subsec. (a) redesignated (b).

Subsecs. (b), (c). Pub. L. 116–260, § 2008(a)(1), redesignated subsecs. (a) and (b) as (b) and (c), respectively. Former subsec. (c) redesignated (d).

Subsec. (d). Pub. L. 116–260, § 2008(a)(3), amended subsec. (d) generally. Prior to amendment, text read as follows: “The Director shall support research and development activities for inertial fusion for energy applications.”

Pub. L. 116–260, § 2008(a)(1), redesignated subsec. (c) as (d). Former subsec. (d) redesignated (e).

Subsec. (e). Pub. L. 116–260, § 2008(a)(4), amended subsec. (e) generally. Prior to amendment, text read as follows: “The Director shall support research and development activities and facility operations at institutions of higher education, National Laboratories, and private facilities in the United States for a portfolio of alternative and enabling fusion energy concepts that may provide solutions to significant challenges to the establishment of a commercial magnetic fusion power plant, prioritized based on the ability of the United States to play a leadership role in the international fusion research community.”

Pub. L. 116–260, § 2008(a)(1), redesignated subsec. (d) as (e). Former subsec. (e) redesignated (f).

Subsecs. (f) to (h). Pub. L. 116–260, § 2008(a)(1), redesignated subsecs. (f) and (g) as (g) and (h), respectively.

Subsecs. (i) to (o). Pub. L. 116–260, § 2008(a)(5), added subsecs. (i) to (o).