Removal of nitric acid from high level liquid wastes (HLLW) of nuclear fuel reprocessing plants is warranted for simplifying the procedure for waste fixing. Chemical denitration aims to reduce the waste volume by destroying the acidity and subsequent concentration by adding suitable reductants. Reduction of nitric acid to gaseous …
The method is based on the use of microwave radiation for the direct denitration of actinide nitrate solutions. The possibility of producing uranium, plutonium, …
Twelve high purity quartz 80mL vials. Working volume is between 5mL and 55mL. For use with Discover SP-D 80 ... Microwave Drying. SAM 255; close Hydrolysis. Discover Prep Hydrolysis; close Microwave Digestion. BLADE; MARS 6; ... 80 mL Pressure Vessel, Quartz - pack of 12. SKU. 909785. Qty. Add to Cart.
As a new type of progressive energy release propellant, nitro gradiently distributed propellant (NGDP) was prepared by a denitration reaction between a denitration reagent and the propellant to remove the energy-containing functional group (–O–NO2) from the surface of the propellant. The kinetics of the denitration reaction …
Application. Microwave Digestion of quartz. A sample preparation method of quartz for elemental analysis is introduced below. The samples are digested using speedwave XPERT in DAP-60 vessels. During the digestion, the reaction temperature is controlled via contactless in-situ temperature sensor (DIRC) to ensure efficient digestion.
The method is based on the use of microwave radiation for the direct denitration of actinide. A method has been developed for producing mixed actinide oxides suitable for fabricating mixed nitride uranium plutonium fuel for fast neutron reactors. The method is based on the use of microwave radiation for the direct denitration of actinide
In this work, the effects on the process of the microwave denitration while using an adiabator are also investigated. Namely, the temperature distribution in the reactor and the efficiency of the denitration process to yield NiO powder are also evaluated by numerical simulation. 2. Materials and methods2.1. Microwave denitration experiment
Step 3: Heating up of molten Pu-U nitrate salt and then thermal decomposi internally heated up in a microwave electrical field. The MH method is such a process that. tion of molten salt (~130 to ~35o·c) Step 4: Partially heating up of denitrated Pu-U nitrate solution is heated up, concentrated and then denitrated to MOX powder by.
During reprocessing, a mixture of plutonium nitrate and uranyl nitrate is recovered from spent fuel and converted into a mixed oxide (MOX) raw powder using a microwave heating denitration method. The raw MOX powder obtained in this method has good sinterability and can produce high-quality pellets. However, raw MOX powders contain many fine ...
Vessel QUARTZ is a Oil/Chemical Tanker, Registered in Malta. Discover the vessel's particulars, including capacity, machinery, photos and ownership. Get the details of the current Voyage of QUARTZ including Position, Port Calls, Destination, ETA and Distance travelled - IMO 9694361, MMSI 256392000, Call sign 9HA3900
A number of accessories are available to help the analyst get the most out of the ETHOS UP. Milestone offers a variety of inserts in different materials (Quartz or TFM) and with various sizes and shapes, accommodating a vast array of applications. Both quartz vessels and insert options are available for the SK-15 and MAXI-44 rotors.
MiniWAVE is a top-loading, compact, axisymmetric Microwave Digestion System consisting of a Touch Screen Controller and up to 4 Digestion Modules connected via USB cables. Each Module is able to digest up to 6 samples simultaneously in 75 ml Quartz or 75 ml Teflon® vessels. Modules can be programmed and monitored using separate digestion ...
In this paper, the denitration process was studied by depressing the pressure inside the vessel where the solution is denitrated. Intermediate and final products were characterized. It was demonstrated that when working pressure ranges between 520 and 970 hPa during denitration, high density UO2 pellets can be obtained without …
Based on the successful development of the co-conversion process, the microwave heating direct denitration facility with a 10 kg MOX/d capacity has been constructed adjacent to the reprocessing plant.
A process vessel is a tank or container designed and equipped with the controls and accessories to complete a sub-process as part of an overall process. The material that the process vessel is made of, as well as its accessories and controls, depend on its intended use. Blending, separation, cooling, purification and changing a …
volume of the mixed solution of Pu-U nitrate is supplied to a denitration vessel and is heated by microwave energy. The mixed solution are concentrated and denitrated succes- sively through vaporization of the nitric acid and thermal decomposition of the mixed nitrates, and changed to Pu0,-UO, mixed oxide cake.
The kinetics of the denitration reaction determines distribution of the nitrate group in the surface layer of NGDP, which further afects the combustion progressivity. In this paper, the kinetic model for the denitration reaction process of the cylindrical single-base gun propellant was studied by the shrinking unreacted core model (SUC model ...
Journal Article: UO{sub 2} Ceramic Grade Powders Prepared by Direct Microwave Denitration at Reduced Pressures
Overview. The MARS 2 is a microwave acid digestion system that produces an aqueous solution for elemental analysis by ICP, ICP-MS, or AA. Plants, soil, foods, pharmaceuticals, and more can be digested easily, using preloaded methods. For over 30 years, lab technicians have been using MARS systems for sample preparation.
@article{osti_7777486, title = {Continuous direct denitration process of plutonium--uranium coconversion using microwave heating method}, author = {Oshima, Hirofumi and Tsuji, Nobuo}, abstractNote = {A study on the development of a continuous co-conversion process of Pu--U mixed nitrate solutions to oxide powder by using a microwave …
reagent thermal denitration: gaseous hydrogen, formal-dehyde, formic acid, urea, sugar, ethanol, etc. [13–15]. It is also appropriate to combine the process with the subsequent use of microwave radiation for preparing U oxides. In this study, we examined the possibility of preparing U oxides in solution by thermal denitration
The unique dual seal of the new iPrep™ allows for the highest working conditions of any microwave digestion vessel. This means it can digest extremely difficult materials such as PET and bunker oil with ease. It also will digest twice as much sample as a typical high performance vessel. This allows for better homogeneity and lower detection ...
The MARS™ 6 is a microwave acid digestion system that produces clear digestate from samples for elemental analysis by ICP, ICP-MS, or AA. Rocks, plants, soil, foods, pharmaceuticals, plastics, metals, and more can be digested easily, using preloaded methods. For over 30 years, lab technicians have been using MARS systems for sample …
The surface area of ThO2 from bulk microwave dissolution-denitration (3.5–4.5 m2/g) was comparable to the standard and further enhanced in polyvinyl alcohol (PVA) aided denitration. View Show ...
+ The quartz digestion vessel enables the digestion process to be visible. + Initiative wireless remote video monitoring system, together with quartz vessels, makes the reaction be seen clearly at a glance. Pictures and videos can be taken during the entire process; + 500 ml ultra-large digestion vessel meets the special requirements for the digestion of …
Based on the successful development of the co-conversion process, the microwave heating direct denitration facility with a 10 kg MOX/d capacity has been constructed adjacent to the reprocessing plant.
Compared with the precipitation (ammonia) method of producing mixed oxides, microwave denitration reduces the generation of secondary liquid radioactive …