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
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
W. Ciechanowicz, B. Lazarević
Nuclear Science and Engineering | Volume 41 | Number 2 | August 1970 | Pages 281-293
Technical Paper | doi.org/10.13182/NSE70-A20714
Articles are hosted by Taylor and Francis Online.
The scope of this paper is the investigation of the control-strategy-design problem. The digital-control system of a model of a nuclear boiling-water reactor power plant of 500-MW electrical output is considered. The proposed approach, i.e., a system partitioning approach, is applied to the case where there are different kinds of interactions inside the system and where the state-vector representation is used to describe the unsteady states of the reactor. The overall control system is investigated for different sampling periods of digital controllers, and for the case where constraints are imposed on the reactivity controller signals. The influence of the real-noise disturbances upon the overall dynamics of a large power reactor is investigated for the case where the control strategy is determined for the ideal white-noise type of disturbance.
