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.
Mathematics & Computation
Division members promote the advancement of mathematical and computational methods for solving problems arising in all disciplines encompassed by the Society. They place particular emphasis on numerical techniques for efficient computer applications to aid in the dissemination, integration, and proper use of computer codes, including preparation of computational benchmark and development of standards for computing practices, and to encourage the development on new computer codes and broaden their use.
Utility Working Conference and Vendor Technology Expo (UWC 2022)
August 7–10, 2022
Marco Island, FL|JW Marriott Marco Island
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
Latest Journal Issues
Nuclear Science and Engineering
Fusion Science and Technology
Arkansas PSC rejects $142 million offer from Entergy in Grand Gulf dispute
While the Mississippi Public Service Commission earlier this year accepted a $300 million offer from Entergy Corporation to settle its portion of a multistate dispute with the utility over Grand Gulf nuclear plant customer rate impacts, the Arkansas Public Service Commission last week turned down its own $142 million offer, terming it “a low-ball amount.”
Qingmin Zhang, Zhigang Hu, Bangjie Deng, Mengxuan Xu, Yuhang Guo
Nuclear Science and Engineering | Volume 186 | Number 3 | June 2017 | Pages 293-302
Technical Paper | dx.doi.org/10.1080/00295639.2016.1273619
Articles are hosted by Taylor and Francis Online.
The self-powered neutron detector (SPND) is popularly used as an in-core neutron flux monitor in reactors due to its simple structure, self-powered feature. However, its response delay needs compensation to obtain the actual real-time neutron flux for reactor control and protection. In this paper, a simple iterative method for compensating SPND response delay is proposed as well as noise filtering. Two favorable noise filtering methods were compared, and then, the moving average filter was chosen. The governing differential equations were established according to decay mechanism, and then, iterative compensation relations for delay compensation were established by discretization with simplicity and flexibility. The test result shows that the compensated response delay for a prompt jump of neutron flux is only 0.9 s, indicating its effectiveness. Furthermore, the dependence on initial conditions and sampling time interval was also studied, indicating that two initial condition determination modes for two typical detector start-up situations can be chosen correspondingly for delay minimization and critical sampling with a time interval of about 0.7 s, which shows consistency with the Von Neumann stability analysis. Finally, our method has been compared with the Z-transform method and verified with measured current, which showed its better performance.