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.
Nuclear Installations Safety
Devoted specifically to the safety of nuclear installations and the health and safety of the public, this division seeks a better understanding of the role of safety in the design, construction and operation of nuclear installation facilities. The division also promotes engineering and scientific technology advancement associated with the safety of such facilities.
2021 Student Conference
April 8–10, 2021
North Carolina State University|Raleigh Marriott City Center
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
Latest Journal Issues
Nuclear Science and Engineering
Fusion Science and Technology
A day in the life of the nuclear community
The November issue of Nuclear News is focused on the individuals who make up our nuclear community.
We invited a small group of those individuals to tell us about their day-to-day work in some of the many occupations and applications of nuclear science and technology, and they responded generously. They were ready to tell us about the part they play, together with colleagues and team members, in supplying clean energy, advancing technology, protecting safety and health, and exploring fundamental science.
In these pages, we see a community that can celebrate both those workdays that record progress moving at a steady pace and the exceptional days when a goal is reached, a briefing is delivered, a contract goes through, a discovery is made, or an unforeseen challenge is overcome.
The Nuclear News staff hopes that you enjoy meeting these members of our community—or maybe get reacquainted with friends—through their words and photos.
Adolf Rýdl, Leticia Fernandez-Moguel, Terttaliisa Lind
Nuclear Technology | Volume 205 | Number 5 | May 2019 | Pages 655-670
Technical Paper | dx.doi.org/10.1080/00295450.2018.1511213
Articles are hosted by Taylor and Francis Online.
Aerosol scrubbing experiments are recalculated for selected POSEIDON-II series tests and TEPCO-TOSHIBA-HITACHI tests with the MELCOR/SPARC code and with the BUSCA code. The major uncertainties in the calculations are identified and the results of the analyses are used in sensitivity simulations for long-term station blackout accident sequence in a boiling water reactor (BWR) with MELCOR/SPARC. The accident sequence is similar in nature to what happened in Fukushima Unit-3.
In the analyses of experiments, the basic characteristics of the thermal-hydraulic behavior were captured very well by MELCOR/SPARC. The trends in the calculated values of decontamination factors (DFs) for aerosols were in good agreement with the data, predicting the dependence of decontamination on the effect of the submergence depth, of steam content in the gas, and of aerosol particle size. However, the absolute values of DFs as calculated by the codes were rather sensitive to changes in the default input options and the agreement with experiments was not convincing.
In the integral BWR sequence simulations, the predicted DFs for aerosols in the wetwell (WW) was sensitive in the same way as for the experiments. For this type of a scenario, the fission product (FP) releases to containment—represented by Cs and I compounds—were mostly discrete events of short duration. The release path was from the reactor vessel to WW during the operation of the safety relief valves and subsequent venting of the containment from the WW gas space. Even though the passage through the WW water in these simulations was the only way for fission products to reach the environment, the sole scrubbing potential of the wetwell was not the determining contributor to the FP retention. At least of the same importance were the details of the sequence progression, timing of events, FP speciation, and other factors.