摘要:
A support clamp assembly (60) for mechanically securing a thermal sleeve (32) to an elbow conduit (34) in a jet pump (18) of a nuclear reactor vessel (10), the support clamp assembly including: a tension shaft (64) having a first end extendable through an opening (118) in a sidewall of the elbow conduit and an opposite end with a head (86); a cruciform assembly (62) having a base (78, 82) with an opening to receive the tension shaft and to abut the head of the shaft, wherein the cruciform assembly seats in the thermal sleeve; a boss (66) slidable over the first end (92) of the tension shaft and having a curved surface (96) seating an outside surface of the elbow conduit, and a coupling device (68) engaging the first end of the tension shaft and abutting the boss, wherein the coupling device places the tension shaft under tension to secure the cruciform assembly to the thermal sleeve and the boss to the elbow conduit.
摘要:
A lifting support for a boiling water reactor nuclear fuel assembly comprising a grappling head configured to allow attachment to a lifting device, a body with an upper end and a lower end, the upper end connected to the grappling head, the body configured to be inserted into a water channel of a boiling water reactor nuclear fuel assembly, and an end connected to the lower end, the end configured to be accepted by the nuclear fuel assembly.
摘要:
The invention relates to a method of handling a container with radioactive material that is stored in a radiation shielding enclosure, comprising the steps of: a) inserting a substantially elongated handling device into the radiation shielding enclosure, b) connecting the handling device to the container, c) taking the container from the radiation shielding enclosure, d) performing one or more activities with or on the container, e) replacing the container into the radiation shielding enclosure, and f) disconnecting the handling device from the container. The invention further relates to a device for carrying out this method, comprising an elongated body having a tip and including means arranged at or near the tip for releasably connecting the device to the container. These connecting means may be adapted for establishing a snap connection with the container, and the handling device may further comprise a release mechanism acting on the connecting means.
摘要:
The aim of the invention is to provide an aligning device (6) for fuel elements (1) with which fuel elements (1) of a pressurized water reactor can be aligned in a comparatively easy and quick manner. To this end, the invention provides that an aligning device (6) for fuel elements comprises an aligning body (8), which extends in a longitudinal direction and whose lateral faces that are formed from side metal sheets (14) can be displaced out of a position of rest in a direction that is perpendicular to the longitudinal direction. The cross-sectional dimensions of the lateral faces of the aligning body in the position of rest are selected so that they are less than the corresponding cross-sectional dimension of a reference fuel element by a predetermined nominal value.
摘要:
A pressure vessel having a removable closure head in a high radiation environment is closed by placing the closure head having a flange over and spaced from the flange of a pressure vessel body containing fissile material. The closure studs are installed in closure stud holes of the pressure vessel body flange. Transition nut members of hydraulic nut assemblies are threaded onto the closure studs. Hydraulic hoses are connected between the hydraulic nut assemblies and a pressure source. The pressure source simultaneously pressurizes the hydraulic nut assemblies to simultaneously apply a uniform force to the closure studs sufficient to seat the spaced apart closure head flange on the pressure vessel body flange and to elongate the closure studs. The hydraulic nut assemblies are locked in place over the closure head flange while the force is applied to the closure studs and the closure studs are elongated. The hydraulic pressure on the hydraulic nut assemblies is released while the hydraulic nut assemblies are locked in place over the closure head flange and the closure studs are elongated. The hydraulic nut assemblies may remain connected with the hydraulic hoses after the pressure vessel has been returned to on-line operations and is generating thermal power. The hydraulic hoses connected with the hydraulic nut assemblies may be vented while generating thermal power in the pressure vessel.
摘要:
Cet outil pour favoriser l'introduction d'assemblages (5) de combustible nucléaire au sein d'un coeur de réacteur, lesdits assemblages étant de forme prismatique et de section carrée, et étant positionnés sur une pluralité d'emplacements contigus, également de section carrée, comportant chacun des pions de positionnement et des orifices de circulation d'un liquide de refroidissement et notamment d'eau, est constitué d'au moins un actionneur, qui, en position rétractée présente un encombrement inférieur à celui d'un assemblage de combustible, ledit actionneur étant pourvu de moyens (15, 16) destinés à agir au niveau des assemblages de combustible mitoyens (12, 13) et/ou au niveau des baffles mitoyennes (14) de la cuve du réacteur de l'emplacement considéré au niveau duquel il est introduit, ledit actionneur étant muni de moyens de préhension (4) destiné à coopérer avec le grappin (3) d'un mât de manutention (2) permettant son introduction au niveau de l'emplacement considéré.
摘要:
Die vorliegende Erfindung betrifft eine Vorrichtung (1) zur Umspülung mindestens eines Stabelements (2) mit mindestens einer Flüssigkeit und/oder mindestens einem Gas, wobei die Vorrichtung (1) mindestens die folgenden Elemente aufweist: a) mindestens einen Rahmen (3) mit einer Oberseite und einer Unterseite und mit mindestens einem ersten und mindestens einem zweiten Umfangsabschnitt zum Durchführen des mindestens einen Stabelements (2), wobei b) der Rahmen (3) in mindestens dem zweiten Umfangsabschnitt mindestens eine Absaugöffnung (9) für Flüssigkeit und/oder Gas aufweist, und wobei c) die Vorrichtung (1) mindestens eine Ableitung (10) für Flüssigkeit und/oder Gas von der mindestens einen Absaugöffnung des Rahmens aufweist. Weiterhin wird ein Verfahren zur Umspülung mindestens eines Stabelements (2) mit mindestens einer Flüssigkeit und/oder mindestens einem Gas bereitgestellt, wobei das Verfahren gleichzeitig mindestens folgende Schritte aufweist: a) Zuleiten der mindestens einen Flüssigkeit und/oder des mindestens einen Gases zu dem mindestens einen Stabelement (2), b) Absaugen von Flüssigkeit und/oder Gas von Absaugöffnungen (9), die an mindestens einem zweiten Umfangsabschnitt eines Rahmens (3) angeordnet sind, und c) Durchführen des mindestens einen Stabelements (2) durch den Rahmen (3).
摘要:
The invention relates to a remote access system designed to make the task of positioning, manipulation and/or maintenance of devices, which are difficult to access or in hostile environments, a much easier operation. The system comprises remote manipulation whereby a device (420), such as a bulb, may be moved from a remote access position (200) along a guide (300) to an enclosure position (100). The enclosure position may, for instance, comprise an area formed in the side wall of a swimming pool, such that, a lens (120) of the enclosure (100) is arranged, in use, to have the device (420) to one side of it, and, sealed from the device on the other side of the lens (120), there may be water. By providing an arrangement whereby the device (420) can be remotely positioned, the need for draining a swimming pool for the simple replacement of blown bulbs etc. is avoided.