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
Decommissioning & Environmental Sciences
The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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
Apr 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
May 2024
Nuclear Technology
Fusion Science and Technology
Latest News
Commercial nuclear innovation "new space" age
In early 2006, a start-up company launched a small rocket from a tiny island in the Pacific. It exploded, showering the island with debris. A year later, a second launch attempt sent a rocket to space but failed to make orbit, burning up in the atmosphere. Another year brought a third attempt—and a third failure. The following month, in September 2008, the company used the last of its funds to launch a fourth rocket. It reached orbit, making history as the first privately funded liquid-fueled rocket to do so.
Dong Zheng, Julie M. Jarvis, Serena Allison-Ptak, Gregory Brauer, Michael Hopman (Bechtel NS&E)
Proceedings | Advances in Thermal Hydraulics 2018 | Orlando, FL, November 11-15, 2018 | Pages 355-364
This paper determines the hydrogen generated during the course of a severe accident in one reactor unit with crossflow through the hardened containment vent piping to the adjacent reactor unit. The hardened pipe vent systems of both units are joined at the mixing chamber at the base of the stack. Per RELAP5 code simulation results, hydrogen will retain significant concentrations in the mixing chamber regions and at the entrances of the connected pipes during the high pressure venting stage of the proposed venting scenario. The concentration of hydrogen will drop after the transition to the low pressure venting. The time required to reduce hydrogen concentration to less than 4% from the connected pipes vary depending on the sizes and location of the pipes. The results and conclusions can be used to support the HCVS design changes to provide severe accident venting capability and compliance with Phases 1 and 2 of the NRC Order EA-13-109.