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
Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
Meeting Spotlight
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
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
May 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
July 2025
Nuclear Technology
June 2025
Fusion Science and Technology
Latest News
BREAKING NEWS: Trump issues executive orders to overhaul nuclear industry
The Trump administration issued four executive orders today aimed at boosting domestic nuclear deployment ahead of significant growth in projected energy demand in the coming decades.
During a live signing in the Oval Office, President Donald Trump called nuclear “a hot industry,” adding, “It’s a brilliant industry. [But] you’ve got to do it right. It’s become very safe and environmental.”
Huajian Chang (State Nuclear Power Technology R&D Cente/Tsinghua Univ), Yuquan Li, Bin Gao, Cheng Li, Yanfang Xue, Nang Wang (State Nuclear Power Technology R&D Center)
Proceedings | Advances in Thermal Hydraulics 2018 | Orlando, FL, November 11-15, 2018 | Pages 1155-1168
The passive safety system is more reliable and simpler than the conventional active safety system. However, the driving force in a passive safety is relatively low, some phenomena and the mechanisms remain unclear, the interactions and the synergistic effects even make the safety analysis complicated. Therefore, it calls a great demand to conduct both the separate and integral effect tests for assessing the passive safety system performance and validating the correlations or models used in the safety analysis codes. In this paper, the passive safety system test activities conducted for AP600, AP1000 and CAP1400 are reviewed. The ROSA, APEX and SPES were used for AP600 and AP1000 PXS integral test, and for CAP1400, the ACME was designed and built based on the previous test experiences. The LST was built for AP600 containment test, and the CERT was built for CAP1400 containment test with the detailed scaling analysis. The ULPU test facilities were used for AP600 and AP1000 IVR tests, and the FIRM used the real RV material for the CAP1400 IVR test. In this work, the main test facilities design and the test results for the passive safety PWR are presented, and the comparisons among the same type test facilities are also given to highlight the improvements of the passive safety tests.