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
Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
Meeting Spotlight
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
May 2025
Nuclear Technology
Fusion Science and Technology
Latest News
TerraPower begins U.K. regulatory approval process
Seattle-based TerraPower signaled its interest this week in building its Natrium small modular reactor in the United Kingdom, the company announced.
TerraPower sent a letter to the U.K.’s Department for Energy Security and Net Zero, formally establishing its intention to enter the U.K. generic design assessment (GDA) process. This is TerraPower’s first step in deployment of its Natrium technology—a 345-MW sodium fast reactor coupled with a molten salt energy storage unit—on the international stage.
Michel Alais, Rene Berger, Rene Boucher, Kenneth A. Gasper, Paul Laurens
Nuclear Technology | Volume 26 | Number 3 | July 1975 | Pages 307-319
Technical Paper | Radioisotope | doi.org/10.13182/NT75-A24432
Articles are hosted by Taylor and Francis Online.
The isotopic cardiac pacemaker directly applies nuclear technology to the field of medicine. Developed in 1970, the Laurens-Alcatel Model 9000 Pacemaker is now being implanted in humans in strict accordance with procedures set down by various regulatory agencies. This paper is an interim report on the reliability tests (with the resultant data) that have been performed on the isotopic cardiac pacemaker. The theoretical data for the longevity of the isotopic generator are discussed, as are the results for resistance to shock and corrosion tests. Comparative data are also given on the energy density of the isotopic generator and compared with other electrical power sources commonly used in cardiac pacing. The source thermal 238Pu source has also been subjected to increasingly severe tests to ensure complete containment of all radioactive material.
