摘要:
Various embodiments are directed towards a nuclear latch assembly. The assembly includes a latch housing and a latch mechanism. The latch mechanism includes a projection member. The latch mechanism provides a biasing force on the projection member. Unless an opposing force on the projection member counterbalances the biasing force, the projection member at least partially projects from a surface of the latch housing. The assembly may include a biasing member that provides the biasing force on the projection member. The assembly may include a bolt. The bolt includes a longitudinal axis. A bore included in the housing is sized to receive the bolt. When the bore receives the bolt, the housing is rotatable about the longitudinal axis of the bolt. The latch mechanism includes a side bore that receives the projection member, the biasing member, and a disk intermediate the projection member and the biasing member.
摘要:
A spent nuclear fuel rod canister includes a submersible pressure vessel including a casing that defines an interior cavity, the casing including a corrosion resistant and heat conductive material with a thermal conductivity of above about 7.0 watts per meter per kelvin; and a rack enclosed within the interior cavity and configured to support one or more spent nuclear fuel rods.
摘要:
Brennstabköcher, insbesondere Brennstabköcher für Brennstäbe, vorzugsweise für beschädigte Brennstäbe, wobei der Brennstabköcher als einstückiger, vorzugsweise geschmiedeter Brennstabköcher mit einem von einem Köcherboden, einem Köchermantel und einem Köcherdeckel umschlossenen Innenraum ausgebildet ist. Der Köcherdeckel weist eine mit einem Verschlusselement verschließbare Köcherdeckelöffnung auf. In dem Innenraum ist zumindest ein Auf-nahmerohr für einen Brennstab angeordnet, welches Aufnahmerohr an einem köcherbodenseitigen Ende fluiddicht verschlossen ist. Das Verschlusselement ist in die Köcherdeckelöffnung einsetzbar, vorzugsweise einschraubbar.
摘要:
The invention relates to a storage device for storing and transporting nuclear fuel assemblies comprising a plurality of adjacent housings each of which is provided with a lateral wall and is used for receiving a nuclear fuel assembly, wherein said lateral walls are formed by slotted stacked and intercrossing structural assemblies (6a, 6b). According to the invention, each structural assembly comprises at least two spaced plates (16, 18) made of a neutron material and an intermediate structure (119) disposed between the plates (16, 18) and contact said plates.
摘要:
An apparatus and method for stabilizing a spent nuclear fuel containment cask so as to prevent tipping under design basis earthquake conditions. In one aspect, the apparatus comprises a lamina and a slid plate in surface contact with the lamina, forming a slidable interface; wherein the slidable interface has a coefficient of friction within a range resulting in an acceptable level of net horizontal displacement of a cask resting on the apparatus under design basis earthquake conditions.
摘要:
Resin (106) for shielding neutrons is provided at the outer periphery of a shell main body (101) that shields the γ-rays. Basket (130) is constructed of a plurality of angular pipes (132) having neutron absorbing property. The inside of a cavity (102) of the shell main body (101) is processed to match its shape with the external shape of the basket (130), and the angular pipes (132) are inserted into this cavity (102) to be brought into contact with the inner surface of the cavity (102). Used nuclear fuel aggregates are accommodated and stored in latticed cells structured by the angular pipes (132). Thermal conductivity of decay heat generated from the used nuclear fuel aggregates is improved as the outer surface of the angular pipes (132) and the inner surface of the cavity (102) are indirect contact with each other.
摘要:
The present invention relates to a method and a device for fuel handling in a nuclear power plant of pressurized-water type comprising at least one fuel assembly (1) with a top part (5) and a bottom part (6), in its turn comprising a plurality of fuel rods (2). The fuel handling comprises extracting the fuel rods (2) in their entirety, or parts thereof, from the substantially vertically arranged fuel assembly (1) from above, either through the top part (5) of the fuel assembly (1) or through the bottom part (6) thereof. The fuel rods (2) extracted from the fuel assembly (1) are arranged to be turnable through 180° around a transverse axis (t) by arranging them in a normally vertically arranged turnable rod magazine (16).
摘要:
A tool set and a method of using those tools in combination is disclosed that are especially well adapted to the function of rearranging and/or replacing the control rods and fuel supports in a boiling water reactor. The tool set includes a grapple (40) that is capable of simultaneously picking up both a control rod and its associated fuel support. A separate unlatching tool (90) is provided for pulling the control rod's release handle in order to decouple the control rod from a control rod drive. A storage rack (150) that may be mounted in the reactor pressure vessel is provided for storing a fuel support and a pair of control rods when the positions of selected control rods are being shifted about the reactor core area. In the method aspect of the invention, the unlatching tool (90) is used to pull the control rod's release handle. Thereafter, the grapple (40) lifts the control rod and its associated fuel support as a unit. When rearranging the positions of the control rods, a first control rod and its associated fuel support are placed in the storage rack (150). Then a second control rod/fuel support assembly is removed in a similar manner and the second control rod is placed in the storage rack (150). Thereafter, the first control rod may be removed from the storage rack (150) and placed in the position formally occupied by the second control rod, with the same fuel support that was removed from the second location.