Conveners
Session 6 (cn't of Session 5) - Nuclear fuel cycles, Research Reactors and present NPP (including Gen IV and Th reactors)
- Carlo Pagani (University of Milano and INFN, Italy)
- Suresh Kumar Aggarwal (Bhabha Atomic Research Centre, India)
Dr
Paolo Giovanni Saracco
(Istituto Nazionale di Fisica Nucleare, Sez. Genova, Italy)
18/09/2012, 16:50
Nuclear fuel cycles, present Gen III+ NPPs, Gen IV and Th based reactors
Invited Lecture
In the framework of research on generation IV reactors, it is very important to have the
opportunity of using infrastructures specifically dedicated to the study of fundamental
parameters in kinetics and/or dynamics of future, fast-neutron based, reactors, a
capability not available for presently available zero-power prototypes.
We propose the conceptual design of an ADS with high safety...
Prof.
Carlo Pagani
(University of Milano and INFN LASA, Italy)
18/09/2012, 17:10
Nuclear fuel cycles, present Gen III+ NPPs, Gen IV and Th based reactors
Invited Lecture
Accelerator Driven Systems (ADS) have been considered and deeply studied since mid nineties as a possible solution to transmute long lived minor actinides and fission products in order to reduce the radio-toxicity of nuclear waste repository. The ADS scheme has been one of the driving objective for the strong development since then of the design of high intensity proton accelerators with MW...
Prof.
Leonid Ponomarev
(NRC "Kurchatov Institute", Russia)
18/09/2012, 17:30
Nuclear fuel cycles, present Gen III+ NPPs, Gen IV and Th based reactors
Invited Lecture
L.I. Ponomarev
NRC “Kurchatov Institute” and MUCATEX, Moscow, Russia
Abstract
The extremely high solubility of PuF3, AmF3 and the fission product fluorides in the eutectics LiF-NaF-KF observed recently (Fig.1 and 2) [1,2] allows to create the efficient molten salt reactor – transmuter (MSRT) for transmutation of the minor actinides (MA) from the spent nuclear fuel [3]. This observation...
Dr
Yury Sobolev
(Johannes-Gutenberg Universität Mainz, Institut für Kernchemie, Germany)
18/09/2012, 17:50
Nuclear fuel cycles, present Gen III+ NPPs, Gen IV and Th based reactors
Invited Lecture
Ultracold neutrons (UCN) are free neutrons with very low kinetic energies corresponding to v~ 5m/s. They can be stored both in material and magnetic traps and thus observed hundreds of seconds limited only by their natural lifetime. The long observation times make it possible to perform precision experiments on the neutron's fundamental properties such as the search for its electric dipole...
Ms
Barbara Filipowicz
(Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland)
18/09/2012, 18:10
Nuclear fuel cycles, present Gen III+ NPPs, Gen IV and Th based reactors
Oral Communications
Due to the high selectivity, radiation resistance, thermal and chemical stability, inorganic ion exchangers have being widely used in the treatment of reactor coolant and aqueous nuclear wastes. Among others, inorganic sorbents, hydrous titanium dioxide are proposed as the promising inorganic sorbent for the efficient separation of fission and corrosion products such as 137Cs, 90Sr,...
Mr
Yusuke OHASHI
(Ningyo-toge Environmental Engineering Center, Japan Atomic Energy Agency, Japan)
18/09/2012, 18:25
Nuclear fuel cycles, present Gen III+ NPPs, Gen IV and Th based reactors
Oral Communications
Most of the metal or bed material wastes generated from uranium enrichment facilities or uranium refining and conversion plants are contaminated by uranium fluoride compounds. It is desirable to recover as much uranium as possible from these wastes. Additionally, if these wastes are decontaminated up to a level regarded as nonradioactive waste, the decontaminated materials should be reused....
Prof.
Jerzy Narbutt
(Institute of Nuclear Chemistry and Technology, Warsaw, Poland)
18/09/2012, 18:40
Nuclear fuel cycles, present Gen III+ NPPs, Gen IV and Th based reactors
Oral Communications
Selective separation of actinide elements from highly radioactive nuclear waste is the key issue for modern technologies of nuclear waste reprocessing. Partitioning of long-lived minor actinides, in particular americium, and their subsequent transmutation into short-lived radionuclides would lead to a significant reduction of long-term environmental hazard from this radiotoxic waste, and...
Dr
Hee-Jung Im
(Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute, Korea)
18/09/2012, 18:55
Nuclear fuel cycles, present Gen III+ NPPs, Gen IV and Th based reactors
Oral Communications
Usually radiolytic gases (such as oxygen and hydrogen molecules) are not detected in cooling system of a research reactor even under room-temperature irradiation conditions. However, the presence of certain amounts of boric acid, which is known as a water soluble thermal neutron absorber, produces an evolution of gases in significant quantity in the reactor at room temperature. To study the...