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
Young Members Group
The Young Members Group works to encourage and enable all young professional members to be actively involved in the efforts and endeavors of the Society at all levels (Professional Divisions, ANS Governance, Local Sections, etc.) as they transition from the role of a student to the role of a professional. It sponsors non-technical workshops and meetings that provide professional development and networking opportunities for young professionals, collaborates with other Divisions and Groups in developing technical and non-technical content for topical and national meetings, encourages its members to participate in the activities of the Groups and Divisions that are closely related to their professional interests as well as in their local sections, introduces young members to the rules and governance structure of the Society, and nominates young professionals for awards and leadership opportunities available to members.
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.
Peiwei Sun, Jin Jiang, Kai Wang
Nuclear Technology | Volume 185 | Number 3 | March 2014 | Pages 239-258
Technical Paper | Fission Reactors | doi.org/10.13182/NT12-130
Articles are hosted by Taylor and Francis Online.
The Canadian supercritical water-cooled reactor (SCWR) can be modeled as a multiple-input multiple-output system. It has a high power-to-flow ratio, strong cross coupling, and a high degree of nonlinearity in its dynamic characteristics. Because of the existence of strong cross coupling among system inputs and outputs, it is difficult for a traditional control system design methodology to produce a satisfactory control system. In this paper, the direct Nyquist array method is used first to decouple the system into a diagonally dominant form via a precompensator. After decoupling the system successfully, three single-input single-output dynamic compensators are synthesized in the frequency domain. By using the precompensator, the temperature variation because of disturbances at the reactor power and pressure is significantly reduced. The control system can effectively maintain the overall system stability and regulate the plant around a specified operating condition. To deal with the nonlinearities, a control strategy based on gain scheduling is adopted. Different sets of controllers are used for the plant at different load conditions. The proposed control strategies have been evaluated under various operating scenarios. The robustness of the controller with respect to operating condition changes is also investigated. It is shown that the decoupling control can effectively reduce the cross coupling inherent in the Canadian SCWR, and gain scheduling control can successfully achieve satisfactory performance for different operating conditions.