ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
Latest Magazine Issues
Apr 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
May 2024
Nuclear Technology
Fusion Science and Technology
Latest News
X-energy receives federal tax credit for TRISO fuel facility
Advanced reactor company X-energy has been awarded $148.5 million in tax credits under the Inflation Reduction Act for construction of its TRISO-X fuel fabrication facility in Oak Ridge, Tenn.
J. Ongena, A. M. Messiaen
Fusion Science and Technology | Volume 49 | Number 2 | February 2006 | Pages 425-440
Technical Paper | Plasma and Fusion Energy Physics - Fusion Reactor Issues | doi.org/10.13182/FST06-A1142
Articles are hosted by Taylor and Francis Online.
The total amount of heating power coupled to the plasma Ptot and the energy confinement time are determining parameters for realizing the plasma conditions suitable for the reactor. We recall that the ignition condition can be expressed by the following condition on the triple fusion product :NT = Ptot2/3 Vol = 3N2T2Vol/Ptot > (NT)ignition (1)with T ~= 15keVwhere = E/Ptot is the energy confinement time, E = 3NT Vol for an isothermal plasma with Ti = Te = T and a plasma volume Vol; N is the plasma density. The value T ~= 15 keV corresponds to the minimum value of (NT)ignition as a function T (see Fig. 1). In the present discussion for the sake of simplicity, we neglect density and temperature profile factors. The heating power in most of the present experiments is given by Ptot = POH + Padd where POH is the ohmic power and Padd is the additional heating due to neutral beam injection or R.F. heating. At ignition, the additional heating power must come completely from the energetic particles produced by the fusion reactions and we must have Ptot = P if we neglect the residual POH and the plasma losses by Bremsstrahlung (PBr [is proportional to] N2T1/2).