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
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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
Feb 2025
Jul 2024
Latest Journal Issues
Nuclear Science and Engineering
March 2025
Nuclear Technology
February 2025
Fusion Science and Technology
Latest News
Neutron Vision at Los Alamos: Exploring the Frontiers of Nuclear Materials Science
In materials science, understanding the unseen—how materials behave internally under real-world conditions—has always been key to developing new materials and accelerating innovative technologies to market. Moreover, the tools that allow us to see into this invisible world of materials have often been game-changers. Among these, neutron imaging stands out as a uniquely powerful method for investigating the internal structure and behavior of materials without having to alter or destroy the sample. By harnessing the unique properties of neutrons, researchers can uncover the hidden behavior of materials, providing insights essential for advancing nuclear materials and technologies.
Xianping Zhong, Jiyang Yu, Xiaolong Zhang, Muhammad Saeed, Yi Li, Zhihui Chen, Bin Tang, Yan Sun, Tao Huang
Nuclear Technology | Volume 207 | Number 2 | February 2021 | Pages 228-246
Technical Paper | doi.org/10.1080/00295450.2020.1763097
Articles are hosted by Taylor and Francis Online.
The pressurizer of a pressurized water reactor (PWR), as a spray-heating degasser, has been widely used to remove dissolved gas in the primary coolant of PWRs. In the real degassing process, the boundary conditions of the pressurizer may change, causing fluctuations in the degassing state and affecting the efficiency of degassing. However, open-published studies have focused mainly on the steady-state degassing characteristics of the pressurizer. This paper studies the dynamic characteristics of a spray-heating degasser as applied to the pressurizer of a PWR. First, a lumped parameter dynamic degassing model for the spray-heating degasser is proposed based on basic gas dissolution and transport theory. Second, this model is extended, and a dynamic degassing model for the pressurizer is obtained. Third, two sets of numerical hydrogen degassing tests are carried out using the pressurizer dynamic degassing model. These two sets of numerical tests take the Shippingport pressurizer as the research object and integrate the structure and operating parameters of the Shippingport pressurizer with the system parameters of a Bettis Atomic Power Laboratory hydrogen degassing test as the numerical test condition.
The spray-heating degasser degassing model is universal and applicable to this pressurizer as well as other devices with similar structures. The first set of numerical tests carried out reveals the physical mechanism of degassing with the spray-heating degasser. The pressurizer degassing model can be used for transient degassing analysis, and it also provides a basis for the subsequent design of the control system of pressurizer degassing.