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Chicago, IL|Chicago Marriott Downtown
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Fusion Science and Technology
Latest News
Webinar: MC&A and safety in advanced reactors in focus
Towell
Russell
Prasad
The American Nuclear Society’s Nuclear Nonproliferation Policy Division recently hosted a webinar on updating material control and accounting (MC&A) and security regulations for the evolving field of advanced reactors.
Moderator Shikha Prasad (CEO, Srijan LLC) was joined by two presenters, John Russell and Lester Towell, who looked at how regulations that were historically developed for traditional light water reactors will apply to the next generation of nuclear technology and what changes need to be made.
A. Abhishek, M. Warrier, E. Rajendra Kumar
Fusion Science and Technology | Volume 65 | Number 2 | March-April 2014 | Pages 222-228
Technical Paper | doi.org/10.13182/FST13-655
Articles are hosted by Taylor and Francis Online.
Understanding helium transport and clustering is important for full understanding of fusion material degradation due to neutron irradiation. Molecular dynamics simulations are carried out to study the clustering of He in FeCr alloy. The simulations are performed for He fractions from 0.1 to 0.4 in FeCr alloy at temperatures ranging from 300 to 800 K. It is observed that a minimum of five He atoms is required to form a stable cluster at temperatures in the range 700 to 800 K. An He5-(Fe/Cr)2-V2 complex is found to exist at 300 K. At higher temperatures, the cluster displaces the Fe and Cr atoms from their lattice sites, forming an He5-V complex. The constituent element of the displaced material is then found to migrate inside the system, depending upon the conditions prevailing there.
