摘要:
Nuclear fuel is put into crucible reduction plant and crucible settling plant made of magnesium oxide and 15-17 mol% of zirconia with particle size of 1 mu m or less, and dry processed. The crucibles are obtained by hot-isostatic press (HIP) in PU-form under pressure of 1000 MPa at 2000[deg] C. The process involves evacuating in HIP with 10-20 Torrs at 60-80[deg] C, increasing helium pressure up to 1000 MPa, heating the crucible in stages, exposing at 2000[deg] C for 1-3 hours, and cooling under pressure up to 1000 MPa at a rate of 500-600[deg] C/minute. Nuclear fuel is put into crucible reduction plant and crucible settling plant made of magnesium oxide and 15-17 mol% of zirconia with particle size of 1 mu m or less, and dry processed. The crucibles are obtained by hot-isostatic press (HIP) in PU-form under pressure of 1000 MPa at 2000[deg] C. The process involves evacuating in HIP with 10-20 Torrs at 60-80[deg] C, increasing helium pressure up to 1000 MPa, heating the crucible to 250[deg] C at a rate of 50[deg] C/minute, up to 780[deg] C at a rate of 100[deg] C/minute, up to 1500[deg] C at a rate of 250-300[deg] C/minute and up to 2000[deg] C, exposing at 2000[deg] C for 1-3 hours, and cooling under pressure up to 1000 MPa at a rate of 500-600[deg] C/minute.
摘要:
This disclosure describes nuclear fuel salts usable in certain molten salt reactor designs and related systems and methods. Binary, ternary and quaternary chloride fuel salts of uranium, as well as other fissionable elements, are described. In addition, fuel salts of UCl x F y are disclosed as well as bromide fuel salts. This disclosure also presents methods and systems for manufacturing such fuel salts, for creating salts that reduce corrosion of the reactor components and for creating fuel salts that are not suitable for weapons applications.
摘要:
A traveling wave nuclear fission reactor, fuel assembly, and a method of controlling burnup therein. In a traveling wave nuclear fission reactor, a nuclear fission reactor fuel assembly comprises a plurality of nuclear fission fuel rods that are exposed to a deflagration wave burnfront that, in turn, travels through the fuel rods. The excess reactivity is controlled by a plurality of movable neutron absorber structures that are selectively inserted into and withdrawn from the fuel assembly in order to control the excess reactivity and thus the location, speed and shape of the burnfront. Controlling location, speed and shape of the burnfront manages neutron fluence seen by fuel assembly structural materials in order to reduce risk of temperature and irradiation damage to the structural materials.
摘要:
Die Erfindung betrifft ein Verfahren für eine trockene Wiederaufbereitung abgebrannter (bestrahlter) fester Kernbrennstoffe und eine Vorrichtung zur Durchführung des Verfahrens. Damit die Kosten für die Aufbereitung deutlich verringert, die flüssigen radioaktiven Abfälle aus dem Prozess vollständig ausgeschlossen und die Qualität des Recycling-Kraftstoffs verbessert werden, wird ein Verfahren angewandt, das die abgebrannten Kernbrennstoffe in mehreren Verfahrensschritten in unterschiedlich gewichtige feste Komponenten umwandelt. Das Wichtigste ist, dass dank dieses Verfahrens der Umfang der radioaktiven Abfälle wesentlich, d.h. von 100 % bis ca. 3 %, reduziert.
摘要:
This disclosure describes nuclear fuel salts usable in certain molten salt reactor designs and related systems and methods. Binary, ternary and quaternary chloride fuel salts of uranium, as well as other fissionable elements, are described. In addition, fuel salts of UClxFy are disclosed as well as bromide fuel salts. This disclosure also presents methods and systems for manufacturing such fuel salts, for creating salts that reduce corrosion of the reactor components and for creating fuel salts that are not suitable for weapons applications.
摘要:
A traveling wave nuclear fission reactor, fuel assembly, and a method of controlling burnup therein. In a traveling wave nuclear fission reactor, a nuclear fission reactor fuel assembly comprises a plurality of nuclear fission fuel rods that are exposed to a deflagration wave burnfront that, in turn, travels through the fuel rods. The excess reactivity is controlled by a plurality of movable neutron absorber structures that are selectively inserted into and withdrawn from the fuel assembly in order to control the excess reactivity and thus the location, speed and shape of the burnfront. Controlling location, speed and shape of the burnfront manages neutron fluence seen by fuel assembly structural materials in order to reduce risk of temperature and irradiation damage to the structural materials.