摘要:
Two turning roller devices (4) are provided side-by-side in an X-axis direction along an axial position of a cylindrical container (2) to be manufactured, which is disposed in a horizontally-long orientation. Skids (5) including recessed parts (11) configured to receive the cylindrical container (2) are provided outside the two turning roller devices (4) while being supported by jack-up stands (7) including jacks (6). Each turning roller device (4) includes a function capable of changing an interval between two rollers (9). Welding work and non-destructive inspection work on the cylindrical container (2) in the circumferential direction are performed by rotating the cylindrical container in the circumferential direction on the rollers (9) with the interval decreased in each turning roller device (4). A pressure proof test is performed on the cylindrical container (2) passed from the turning roller devices (4) onto the skids (5) on the jack-up stands (7) with the interval between the rollers (9) increased in each turning roller device (4). Thereby, operation time and costs are reduced, and work quality is prevented from deteriorating due to the worsening of the working posture.
摘要:
A test piece preparation step of preparing a test piece (50) including a welding structure in which a welding material formed of an austenitic alloy is welded to a member formed of low-alloy steel or low-carbon steel, a hydrogen supply step of supplying hydrogen to the test piece (50), and a characteristic stress acquisition step of applying a load (F) to the test piece (50) to which hydrogen was supplied and acquiring a characteristic stress showing material mechanical properties of the test piece (50) are executed.
摘要:
Two turning roller devices (4) are provided side-by-side in an X-axis direction along an axial position of a cylindrical container (2) to be manufactured, which is disposed in a horizontally-long orientation. Skids (5) including recessed parts (11) configured to receive the cylindrical container (2) are provided outside the two turning roller devices (4) while being supported by jack-up stands (7) including jacks (6). Each turning roller device (4) includes a function capable of changing an interval between two rollers (9). Welding work and non-destructive inspection work on the cylindrical container (2) in the circumferential direction are performed by rotating the cylindrical container in the circumferential direction on the rollers (9) with the interval decreased in each turning roller device (4). A pressure proof test is performed on the cylindrical container (2) passed from the turning roller devices (4) onto the skids (5) on the jack-up stands (7) with the interval between the rollers (9) increased in each turning roller device (4). Thereby, operation time and costs are reduced, and work quality is prevented from deteriorating due to the worsening of the working posture.
摘要:
In an installation device of a reactor repair device and a method, an installation pole (111) connected with an upper portion of a water jet peening device (101), a lifting device (112) that can suspend and support an upper portion of the installation pole (111) and can lift the installation pole (111) from a work floor (121), a moving device (113) that can move the lifting device (112) in two directions intersecting in a horizontal direction, and a position adjustment device (114) that can move the installation pole (111) in the horizontal direction in a state where the installation pole (111) is supported by the lifting device (112).
摘要:
Die Erfindung betrifft einen Kernreaktor (1) mit einer dessen Reaktordruckbehälter (3) umschließenden thermischen Isolierung (6) und mit einem Flutungsraum (7) zwischen dem Reaktordruckbehälter (3) und der thermischen Isolierung (6). Für eine effektive und schnelle Notfall-Außenkühlung des Reaktordruckbehälters (3) bei zugleich guter Strahlungsabschirmung und geringen thermischen Verlusten im Normalbetrieb ist zum einen ein im Flutungsraum (7) fixierter Abschirmring (9) vorgesehen, der als materielle Barriere den Flutungsraum (7) in zwei getrennte Flutungskammern (11) unterteilt, und zum anderen ein Bypasskanal (12), der die beiden Flutungskammern (11) miteinander verbindet, und welcher im Normalbetrieb des Kernreaktors (1) verschlossen und im Störfall zu öffnen ist.
摘要:
A containment vessel (3) has an inner shell (17) covering a reactor pressure vessel (2), and also has an outer shell (18) forming an outer well (19) which is a gas-tight space covering the horizontal outer periphery of the inner shell (17). The inner shell (17) has a first cylindrical side wall (4a) which surrounds the horizontal periphery of the reactor pressure vessel (2), a containment vessel head (6) which covers the upper part of the reactor pressure vessel (2), and a first top slab (5a) which connects in a gas-tight manner the periphery of the containment vessel head (6) and the upper end of the first cylindrical side wall (4a). The outer shell (18) has a second cylindrical side wall (4b) which surrounds the outer periphery of the first cylindrical side wall (4a), and also has a second to slab (5b) which connects in a gas-tight manner the vicinity of the upper end of the second cylindrical side wall (4b) and the first cylindrical side wall (4a). In an accident of the nuclear reactor, without relying on an external power source, the release of particulate radioactive materials to the environment can be suppressed and the pressure in the containment vessel can be limited to a design pressure or below.
摘要:
A containment vessel for containing a reactor pressure vessel (2) and steam generators (3) has a main containment vessel (7), a diaphragm (9), a pressure suppression chamber (12), LOCA vent pipes (15). The reactor pressure vessel (2) contains a reactor core (1) of a pressurized water reactor. The diaphragm (9) partitions the main containment vessel (7) into an upper vessel (10) and a lower vessel (11). The pressure suppression chamber (12) has a suppression pool (13) to store water (14) and gas phase of the pressure suppression chamber (12) communicates with the upper vessel (10). The LOCA vent pipes (15) connect the pressure suppression chamber (12) to the lower vessel (11). All of the equipment and piping that constitute the reactor pressure boundary, including the reactor pressure vessel (2), the steam generators (3), a cold leg pipe (4) and a hot leg pipe (5), are contained in the lower vessel (11).
摘要:
To provide nozzle welding method which can be performed automatically and efficiently, and which can also be performed under the condition of a high-exposure amount. The nozzle welding method includes: a built-up groove forming process of forming a built-up groove portion (21) by digging an inner surface (19) of a vessel into a substantially cylindrical shape in a range including at least a J-groove (27); a build-up welding process of forming a built-up weld portion in the built-up groove portion (21) by build-up welding in such a manner that a plug (31) is configured by a plug main body portion (33) having an inner end surface (37) forming an extending portion of the outer surface (29) of the built-up groove portion (21), and is also configured by a projecting portion (35) projected from the inner end surface (37) and having an axis center substantially coincident with the axis center of the build-up groove portion (21), and the plug (31) is inserted into a nozzle hole (13) so as to make the inner end surface (37) substantially coincident with the outer surface (29) of the built-up groove portion (21); a vessel side weld groove portion forming process of forming the J-groove (27) in the build-up weld portion; and a nozzle attaching process of completing the J-groove (27) portion by inserting the nozzle and welding the J-groove (27) portion.