摘要:
Anlage zur Verarbeitung von radioaktiv kontaminiertem Material mit einer Mehrzahl von Anlagenkomponenten Bei einer, Anlage zur Verarbeitung von radioaktiv kontaminiertem Material mit einer Mehrzahl von Anlagenkomponenten sind die Anlagenkomponenten in einer Mehrzahl von raumbildenden Modulen (34, 35, 38, 41, 48, 53, 56-61) angeordnet, die voneinander gesondert transportierbar sind und zum Betrieb der Anlage aneinandergestellt sind und im aneinander gestellten Zustand miteinander fluchtende Anschlüsse zum Verbinden von in benachbarten Modulen angeordneten Anlagenkomponenten aufweisen.
摘要:
The present invention relates to methods for treating metallic waste contaminated by radionuclides, wherein one of said methods comprises deactivating the metallic waste in a liquid medium using an etching solution, a cleaning solution and water. The metallic waste is then melted in an induction furnace while adding refining fluxing agents thereto. The ingots are further submitted to a dosimetric control before solidifying the etching solution. The deactivation of the metallic waste in a liquid medium is first carried out using the etching solution that contains from 5 to 200 g/l of a strong acid and from 0.1 to 15 g/l of a sulphur-containing activator or corrosion inhibitor at a temperature of between 10 and 100 DEG C. The method further comprises applying the cleaning solution that contains from 2 to 100 g/l of a strong acid and from 1 to 20 g/l of an oxidant at a temperature of between 10 and 90 DEG C before carrying out the treatment using water. The metal ion concentration in the etching solution is monitored so that in case said concentration exceeds a predetermined value, a portion of said solution is removed for solidification while the corresponding portion of the remaining solution is strengthened using a strong acid. During the melting process, the content of refining fluxing agents relative to the metal is kept in a range of between 0.9 to 4 wt.%.
摘要:
The invention relates to a process for recycling metal parts which have been contaminated by radioactive elements, especially alpha-emitters. A melt and slag are formed from the metal parts and the slag is removed. Before the melt and slag are formed, the radioactive elements must be oxidised. To that end, the contaminated metal parts can be exposed to an oxygen-containing atmosphere at a temperature below the melting point of the metal parts.
摘要:
A method for removing lithium tritide (LiT) from a lithium blanket involves transferring molten lithium containing LiT from the lithium blanket to a non-centrifugal contactor and carrying out further extraction and the separation steps to recover the tritium. A fraction of LiT from the molten lithium is extracted into a solvent phase containing a molten lithium salt. The phases are separated after extraction in a cyclonic or hydrocyclonic phase separator that is fluidically connected to the extraction column of the non-centrifugal contactor.
摘要:
Lithium hydroxide (LiOH) can be used as solvent for extracting lithium tritide from molten lithium metal, such as that found in a lithium blanket of a nuclear fusion reactor. Use of LiOH avoids the problems of generation of acids, particularly of HF, by the prior art process. Electrochemical cells for electrolyzing LiT are provided with suitably high anode and cathode areas or suitably long flow paths, which have been found to be required for superior operation.
摘要:
The invention relates to a method for reducing the radioactivity of technical substances, particularly of radioactive waste products from nuclear power plants. The method is characterized in that the radioactive substance is introduced into hot volcano lava.
摘要:
Die Erfindung betrifft ein Verfahren zur Reduzierung der Radioaktivität von technischen Stoffen, insbesondere von radioaktiven Abfallprodukten aus Kernkraftwerken. Das Verfahren zeichnet sich dadurch aus, dass der radioaktive Stoff in heisse Vulkanlava eingebracht wird.
摘要:
A waste treatment system is provided, including a waste melter system (14) and an air pollution control system (16). Hazardous and/or radioactive waste in drums is conducted through a waste feed system into a plasma chamber (20) where the waste is exposed to heat from a plasma torch (22). A part of the waste volatilizes and leaves the plasma chamber (26) for a secondary reaction chamber (32), in which the waste is combusted to form a waste gas stream. The air pollution control system (16) treats the waste gas stream through quenching, filtering and scrubbing, to produce a clean gas stream suitable for release to the atmosphere. Offgas may be recirculated through the waste treatment system as desired. The waste remaining inside the plasma chamber melts and drops onto sloped processing surfaces inside a hearth located below the plasma torch. The hearth includes ground electrodes configured for electrical contact with waste held in the hearth so that the melted waste in the hearth may be further heated by the plasma torch. As the melted waste is heated inside the hearth, the hearth is static, enabling the melted waste to separate into a first metal fraction having a high specific gravity and a second slag fraction having a relatively lower specific gravity. When the melted waste is processed sufficiently, the hearth is first lowererd from the plasma chamber and then tilted in a first direction to pour the slag fraction and then tilted in another to pour the metal fraction from under an underflow weir configured in the hearth. The hearth includes a second ground electrode strategically situated near the underflow weir to ensure that the waste remains melted as it flows through a flow path under the underflow weir.