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.
Education, Training & Workforce Development
The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
2021 Student Conference
April 8–10, 2021
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
Don't forget to vote!
The 2021 ANS Election is open. This is your chance to help shape the future of your Society.
All ANS members were sent an email on February 22 with a unique username and password from Survey & Ballot Systems (SBS). If you did not receive this email or you do not have your election login information, please go to directvote.net/ANS, enter your email address that is on file with ANS, and your election login information will be emailed to you.
W. Cyrus Proctor, J. Michael Doster
Nuclear Technology | Volume 179 | Number 3 | September 2012 | Pages 339-359
Technical Paper | Fission Reactors/Nuclear Plant Operations and Control | dx.doi.org/10.13182/NT12-A14167
Articles are hosted by Taylor and Francis Online.
Local space and energy impact densities of various types of loose parts have been generated within a representative steam generator inlet plenum. This work expands upon previous experimental research to identify important mechanisms that govern accumulated loose part damage to steam generator tube sheets. As a result, a computational model for estimating loose part impact damage, including damage to steam generator tube ends from multiple impacts, was previously created. Damage effects were determined to be local effects that depended only on single impacts and impact overlaps in a small region of interest. It was found that the damage could be directly related to local impact density on the steam generator tube sheet.In this work, three-dimensional flow fields were generated, first for a previously used 1:8 scale experimental inlet plenum and then for a 1:1 scale Westinghouse type D steam generator. Monte Carlo simulations were carried out as a function of coolant temperature, coolant inlet velocity, loose part type, shape, mass, density, initial starting location, and initial kinetic energy. No a priori knowledge was assumed for the initial starting location and initial kinetic energy of the parts. Comparisons were performed between previous scaled experimental results and scaled computational simulation results to assess the validity of predictions from the scaled simulation. Combined, both this work and previous work could allow for the assessment of impact damage rates on steam generator tube sheets via simulation.The most-energetic impacts are not localized to any particular region on the tube sheet. The general progression of the spatial distribution of all impact locations as a function of initial kinetic energy accurately depicts the progression for the highest-energy impacts. As the initial kinetic energy increases and as the starting location moves toward the inlet plenum, there is an increase in the number of higher-energy impacts. The higher-initial kinetic energy impacts lead to higher-energy first impacts on the tube sheet. Beyond the first impact, the energy distribution is invariant to initial kinetic energy and initial start location. The invariance seen in the energy distribution does not hold the same for the spatial distribution. The effects of the initial kinetic energy and initial start location ripple into the second and third impacts. Beyond the third impacts little to no change can be discerned and the invariance due to initial kinetic energy and initial start locations is valid. Ultimately, with these types of analyses, reactor facilities will be able to better judge whether a system necessarily needs to shut down due to safety concerns about loose parts damage before a scheduled outage.