scholarly journals Integration of Delayed Neutron and Differential Die Away Techniques for the Next Generation of Safeguards Initiative Spent Fuel Non-Destructive Assay Effort

2013 ◽  
Author(s):  
Holly R. Trellue ◽  
Vladimir Henzl ◽  
Andrea Favalli ◽  
Pauline Blanc ◽  
Thomas L. Burr
Keyword(s):  
Delayed Neutron ◽  
Next Generation ◽  
Spent Fuel ◽  
Non Destructive

New Developments in High-Resolution X-ray Computed Tomography for Non-Destructive Defect Detection in Next Generation Package Technologies

2008 ◽  
Author(s):  
Mario Pacheco ◽  
Deepak Goyal
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Region Of Interest ◽  
Alternative Methods ◽  
Next Generation ◽  
New Developments ◽  
X Ray ◽  
Ct Technology ◽  
X Ray Computed ◽  
Non Destructive

Abstract The development of a next generation high-resolution x-ray Computed Tomography (CT) tool and its applications are reported in this paper. Some of the key features are region of interest capability, improved time-to-data, improved usability, and data collection automation capability. We also discuss the key technical challenges that are faced by x-ray CT technology. Critical cases that are hard or not possible to isolate by alternative methods are also discussed. Examples include Controlled Collapse Chip Connection (C4) bump cracking and “invisible” non-wetting analysis, ball grid array (BGA) solder joint cracking, and wirebond microcracking and wirebond shorting, as well as demonstration of progressive testing capability.

Non-Destructive Determination of the Nuclear Material Content of Spent Fuel Pieces in Canisters

2013 ◽  
Vol 60 (2) ◽  
pp. 1080-1085 ◽  
Author(s):  
Jozsef Zsigrai ◽  
Cong Tam Nguyen ◽  
Istvan Almasi ◽  
Laszlo Lakosi
Keyword(s):  
Nuclear Material ◽  
Spent Fuel ◽  
Material Content ◽  
Non Destructive

Comparison of Advanced Melting Process for HLW Vitrification, Joule-Heated Ceramic-Lined Melter (JHCM) and Cold-Crucible Induction Melter (CCIM)

2017 ◽  
Author(s):  
Akira Sakai ◽  
Hajime Koikegami ◽  
Siegfried Weisenburger ◽  
Guenther Roth ◽  
Norio Kanehira ◽  
...  
Keyword(s):  
Noble Metals ◽  
Melting Process ◽  
The United States ◽  
Waste Form ◽  
High Level Waste ◽  
Cold Crucible ◽  
Next Generation ◽  
Spent Fuel ◽  
Advantages And Disadvantages ◽  
The World

High level waste (HLW) originating from reprocessing of spent fuel commercial power reactors contains more than 40 different elements. Vitrification into borosilicate glass at 1100 ∼1200°C is the process of choice. It is routinely used to immobilize the radioactive waste constituents in a chemically stable matrix for a final geological disposal. Melting process for commercial HLW glasses are variants of two basic designs. (1) The joule-heated ceramic-lined melter (JHCM) originally developed in the United States in 1973 and used in several nuclear sites in the world. (2) The hot-walled induction melter (HWIM), developed in France starting in 1962 and used in France and UK. These technologies, while effective, do pose limitations in waste form compositions and throughput rates. Particularly HLW originating from commercial spent fuel reprocessing usually contains noble metals elements such as ruthenium (Ru), rhodium (Rh), and palladium (Pd) which require special attention when this waste is vitrified. Recent advances to both of these baseline technologies are beginning to be used with large gains to ensure waste form flexibility, throughputs, and noble metals compatibility. The next generation JHCMs use a steeply sloped bottom and a subsidiary-heating bottom drain to allow these noble metals particles to be effectively flushed from the melter with higher waste loadings. Similar melters are being installed near Guangyuan/Sichuan province, China by German consortium team and being developed for the second K-Facility melter at Rokkasho by Japan Nuclear Fuel Limited (JNFL). As another example the advanced JHCMs will be installed in the Hanford WTP project having large glass pool surface area with rapid bubbling. Significant improvements on induction melters have also been implemented. AREVA recently installed a cold-crucible induction melter (CCIM) in combination with a rotary calciner at La Hague in France. This melter uses radio frequency induction to power the glass melt itself and water cooling of the outer surface maintains a frozen glass shell (skull) as the glass contact material. Because no permanent refractories or embedded electrodes are used, this design allows for high-temperature operation and can tolerate more corrosive melts, and uses a water-cooled, motor-driven mechanical stirrer to comply with noble metals behavior. This paper highlights some of these advances and suggests potential advantages and disadvantages of these next generation melter technologies comparing advanced JHCM with updated CCIM. In conclusion, these melters have made the technologies of choice for new HLW vitrification projects around the world.

scholarly journals Non-Destructive Spent Fuel Characterization with Semi-Conducting Gallium Arsinde Neutron Imaging Arrays

2002 ◽  
Author(s):  
Douglas S. McGregor ◽  
Holly K. Gersch ◽  
Jeffrey D. Sanders ◽  
John C. Lee ◽  
Mark D. Hammig ◽  
...  
Keyword(s):  
Neutron Imaging ◽  
Spent Fuel ◽  
Imaging Arrays ◽  
Fuel Characterization ◽  
Non Destructive
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