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.
Explore membership for yourself or for your organization.
Conference Spotlight
2026 ANS Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
Latest Magazine Issues
Mar 2026
Jan 2026
Latest Journal Issues
Nuclear Science and Engineering
April 2026
Nuclear Technology
February 2026
Fusion Science and Technology
Latest News
TerraPower announces second Ac-225 production facility
TerraPower Isotopes, a TerraPower subsidiary, plans to increase its actinium-225 production 20-fold by opening a new manufacturing facility in Philadelphia, Pa., and by expanding the capacity of its Everett, Wash., facility. On March 17, TerraPower Isotopes said it expects the new facility to begin producing the medical radioisotope for targeted alpha therapy in 2029.
Qicang Shen, Brendan Kochunas
Nuclear Science and Engineering | Volume 197 | Number 7 | July 2023 | Pages 1364-1385
Technical Paper | doi.org/10.1080/00295639.2022.2159276
Articles are hosted by Taylor and Francis Online.
Solving initial value problems with high-order methods receives considerable attention in many fields because these methods can potentially improve the accuracy of the simulation results with lower computational cost than low-order methods. Most methods, however, are either complicated to implement or unstable when the order of accuracy is high. The spectral deferred correction (SDC) method is a stable, robust, and efficient high-order time-integration scheme capable of an arbitrary order of accuracy. In this paper, we apply the SDC method to solve the initial value problem of the point kinetics equations (PKEs). For our implementation, we show that SDC is -stable for orders up to eight and the order of accuracy is verified for PKE problems with a range of different reactivities. A fifth-order SDC method was then implemented to solve the exact PKE in the transient multilevel method of MPACT. The error from solutions of the exact PKE with SDC is shown to be negligible. The investigations made here can provide the foundation for future investigations simulating the neutron transport problem using the high-order methods for both spatial discretization and time integration.