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
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.
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
Mar 2025
Jul 2024
Latest Journal Issues
Nuclear Science and Engineering
March 2025
Nuclear Technology
Fusion Science and Technology
April 2025
Latest News
Nuclear News 40 Under 40 discuss the future of nuclear
Seven members of the inaugural Nuclear News 40 Under 40 came together on March 4 to discuss the current state of nuclear energy and what the future might hold for science, industry, and the public in terms of nuclear development.
To hear more insights from this talented group of young professionals, watch the “40 Under 40 Roundtable: Perspectives from Nuclear’s Rising Stars” on the ANS website.
Ung-Soo Kim, Poong-Hyun Seong
Nuclear Technology | Volume 141 | Number 2 | February 2003 | Pages 157-166
Technical Paper | Nuclear Plant Operations and Control | doi.org/10.13182/NT03-A3357
Articles are hosted by Taylor and Francis Online.
In this research, lower shifted worth control rods (LSWCRs) are suggested to mitigate problems related to variation of axial power distribution during the power maneuvering of pressurized water reactors. These rods are classified into two types. The first type is "multipurpose control rod," and the other type is "regulating control rod." Two multipurpose control rod banks (LSWCR1, LSWCR2) and three regulating control rod banks (LSWCR5, LSWCR4, LSWCR3) are suggested and developed. The moving characteristics of LSWCRs, related to variation of reactivity and the axial offset (AO), are analyzed, and the operation strategy for LSWCRs is established. Then, an application of LSWCRs for the power maneuvering is performed using the developed strategy, and the reference daily load pattern is 100-50-100%, 2-6-2-14h pattern that is appropriate for operation of the electric grid in Korea. From the results, it is shown that the combinative use of multipurpose control rods (LSWCR1, LSWCR2) makes it possible to control the AO within the target band during the power maneuvering. Also, the results show that the power maneuvering without reactivity compensation by change of boron concentration is accomplished, and consequently the minimization of boron concentration change is possible.