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
Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
Meeting Spotlight
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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
April 2025
Fusion Science and Technology
Latest News
First astatine-labeled compound shipped in the U.S.
The Department of Energy’s National Isotope Development Center (NIDC) on March 31 announced the successful long-distance shipment in the United States of a biologically active compound labeled with the medical radioisotope astatine-211 (At-211). Because previous shipments have included only the “bare” isotope, the NIDC has described the development as “unleashing medical innovation.”
Doo-Hyung Choe, Jae-Hyuk Baeg, Suk-Hwn Jung (Doosan Heavy Industries & Construction), Steve Yang (Doosan HF Controls Corp.)
Proceedings | Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technolgies (NPIC&HMIT 2019) | Orlando, FL, February 9-14, 2019 | Pages 367-376
Rod Control System (RCS) is to control position of the neutron absorbing full-length rods (control rods or rods) in Nuclear Power Plants (NPPs). Although an RCS is classified as non-safety system, there is stringent requirement for its reliability and availability to avoid an unwanted reactor trip due to a single failure of the RCS. The unwanted reactor trip caused by a single failure of the RCS refers to Single Point Vulnerability (SPV) of the RCS, which is detrimental to an NPP’s continuous and healthy operations because of significant economic impact including operation & maintenance cost. Therefore, it is important to design and implement an RCS with high reliability, availability, operability, and maintainability that can tolerate faults and defeat the SPV for NPPs. For this reason, a modern and highly reliable RCS has been developed with the goal of reducing the SPV to zero and by applying disciplined specification and implementation of design as well as comprehensive Equipment Qualification (EQ) that are consistent with the 10 CFR50 Appendix B requirements. In the modernized RCS, full redundancy controller is used in both the logic and power cabinets. The other key improvements for this modernized RCS are the adoption of dual grippers (versus a single gripper used in the old RCS) and application of DC-hold function (not implemented in the old RCS). These design and implementation aims at completely eliminating the SPV and is fulfilled through analyzing 300 SPV cases in the operating history of the old RCS, which used non-redundant control components.
