In Japan, since plutonium is to be used as a nuclear fuel material under the nuclear energy policy, the objective of partitioning and transmutation (P&T) is oriented to removal and transmutation of mainly MA and long-lived fission products. Under the OMEGA (option making of extra gain from actinides and fission products transmutation) programme, on the basis of the double-strata fuel cycle conc...

The instant release fraction of a spent nuclear fuel is a matter of concern in the performance assessment of a deep geological repository since it increases the radiological risk. Corrosion studies of two different spent nuclear fuels were performed using bicarbonate water under oxidizing conditions to study their instant release fraction. From each fuel, cladded segments and powder samples obt...

In oxide nuclear fuels, at high burn-up or during temperature periods such as ramp tests, out-of-pile heating any irradiations linear heat rates, fission gases can form micrometric quasi-micrometric bubbles. During nominal operations, these bubbles participate to the pellet swelling, decrease of fuel thermal conductivity and are involved in mechanisms leading gas release. events involving a inc...

Abstract The primary objective of this study was to evaluate the qualities Miscanthus pellets blended with pine sawdust at various ratios ( /pine sawdust—0:100, 25:75, 50:50, 75:25, and 100:0) relate them energy generation potential under typical production conditions widely used bioenergy technologies according literature. Samples each material were milled required sizes in proportions mention...

Almost all major nuclear operations produce residues containing radioactive materials; in reactor operations, for example, the fission products, new elements (such as plutonium) produced by neutron irradiation and the unfissioned nuclear fuel are all radioactive. Some of this material can be put to further use: useful radioisotopes, for instance, can be extracted from the fission products and p...

In this work, a computationally efficient law of nuclear fuel property obtained from molecular dynamics calculations is implemented in performance code, bridging the gap between atomic and pellet scales. The Cooper-Rushton-Grimes potential employed through simulations to compute heat capacity stoichiometric mixed-oxide fuels U1-yPuyO2 1000 K melting temperature, over whole range plutonium conte...

A new detection technique, originally thought for the detection of explosives in cargo containers, is presented in this paper for the particular application of isotopic detection of nuclear materials in a Nuclear Energy System (NES). This technique is called Nuclear Resonance Fluorescence (NRF) and the reference fuel scheme to which it is applied is the Sodium Fast Reactor (SFR). The objective ...

Crude extracts of Xenopus eggs are capable of nuclear assembly around chromatin templates or even around protein-free, naked DNA templates. Here the requirements for nuclear assembly around a naked DNA template were investigated. Extracts were separated by ultracentrifugation into cytosol, membrane, and gelatinous pellet fractions. It was found that, in addition to the cytosolic and membrane fr...

The acid guanidinium-phenol-chloroform (AGPC) method has been used extensively for total RNA extraction because of its simplicity and ease (1). In our hands, the AGPC method was found to be very useful for the isolation of intact RNA from several tissues and cell lines (3). On the other hand, when we tried to use the AGPC method to extract nuclear RNA, we were faced with difficulties. The main ...