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
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
Meeting Spotlight
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott 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
Jun 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
July 2025
Nuclear Technology
Fusion Science and Technology
Latest News
Smarter waste strategies: Helping deliver on the promise of advanced nuclear
At COP28, held in Dubai in 2023, a clear consensus emerged: Nuclear energy must be a cornerstone of the global clean energy transition. With electricity demand projected to soar as we decarbonize not just power but also industry, transport, and heat, the case for new nuclear is compelling. More than 20 countries committed to tripling global nuclear capacity by 2050. In the United States alone, the Department of Energy forecasts that the country’s current nuclear capacity could more than triple, adding 200 GW of new nuclear to the existing 95 GW by mid-century.
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.
