摘要:
A boiling water reactor comprises a reactor pressure vessel accommodated in a vertical fashion, a core disposed at a low portion in the reactor pressure vessel, a plurality of control rods to be inserted from an upper side of the core into the spaces between adjacent fuel assemblies and withdrawn therefrom upwardly, a shroud surrounding the fuel assemblies so as to define the core and having an upper end opening, a shroud head which closes the upper end opening of the shroud and through which the control rods are inserted or withdrawn, a separator standing upward from the shroud head to carry out gas-water separation of steam generated from the core, a fixing pedestal disposed above the separator, a control rod driving mechanism mounted on the fixing pedestal and adapted to drive the control rods, a drier unit including a plurality of drier elements annularly arranged along an upper inner wall surface of the reactor pressure vessel and adapted to dry the steam passing through the steam flow hole of the fixing pedestal, and a jet pump unit disposed in a space between an outer surface of the shroud and an inner wall surface of the reactor pressure vessel.
摘要:
A steam injector includes a casing having a water supply port and a steam intake port, the casing being generally composed of two halves fastened integrally, a water nozzle and a steam nozzle both disposed in the casing and communicated with the water supply port and the steam intake port, respectively, a steam-water mixing nozzle disposed on the downstream side in the casing and a diffuser disposed further downstream side in the casing. The steam injector further includes a guide member such as guide vane or spacer ring for guiding the steam to the steam-water mixing nozzle. The steam injector may includes a needle valve disposed in a steam jetting nozzle, disposed axially in the central portion of the casing, which is provided with a heat transfer preventing structure such as hollow wall structure provided on the outer peripheral surface of the steam jetting nozzle. The water nozzle may be composed of a wear resisting material and the wear resisting material may be provided on the surfaces of the steam jetting nozzle and the diffuser.
摘要:
A steam injector includes a casing having water supply port and a steam intake port, the casing being generally composed of two halves fastened integrally, a water nozzle and a steam nozzle both disposed in the casing and communicated with the water supply port and the steam intake port, respectively, a steam-water mixing nozzle disposed on the downstream side in the casing and a diffuser disposed further downstream side in the casing. The steam injector further includes a guide member such as guide vane or spacer ring for guiding the steam to the steam-water mixing nozzle. The steam injector may includes a needle valve disposed in a steam jetting nozzle, disposed axially in the central portion of the casing, which is provided with a heat transfer preventing structure such as hollow wall structure provided on the outer peripheral surface of the steam jetting nozzle. The water nozzle may be composed of a wear resisting material and the wear resisting material may be provided on the surfaces of the steam jetting nozzle and the diffuser.
摘要:
A fusion reactor has an internal component in which an internal structure assembly is housed in a toric vacuum vessel in an arrangement along a circumferential direction thereof and in which a high-temperature plasma in which hydrogen and hydrogen isotopes are maintained in a plasma state is confined in a toric internal space defined in the internal structure assembly. The internal component includes a cooling structure of a multi-wall structure having multiple walls formed to the internal structure assembly and a flow channel formed in the cooling structure for a cooling fluid for extracting heat caused by plasma and a nuclear reaction. The internal structure assembly includes a plurality of outboard blanket assemblies each having a surface facing the plasma, a plurality of inboard blanket assemblies each having a surface facing the plasma and a plurality of divertor assemblies each having a surface facing the plasma, the outboard blanket assemblies and the inboard blanket assemblies and the divertor assemblies being arranged along the circumferential direction of the toric vacuum vessel and each of these assemblies being provided with the cooling structure formed on the surface thereof facing the plasma. The internal component also includes means for detecting leakage of gas.
摘要:
A hybrid lens (3) has a structure in which a resin layer (2) composed of an ultraviolet curable resin is formed on the surface of a lens base material (1) composed of translucent ceramic. The lens base material (3) is composed of translucent ceramic containing as a main component an oxide with a perovskite structure represented by A{M,(B1, B2)}O3 (A is at least one selected from Ba, Sr and Ca, B1 is at least one selected from In, Y, Zn and Mg, B2 is at least one selected from Ta and Nb, and M is at least one selected from Ti, Zr, Hf and Sn) and at least Fe and Cu as sub-components. When the Fe content and Cu content in the translucent ceramic are x and y, respectively, 3x+y is 40 ppm by weight or less so that the hybrid lens (3) having excellent uniformity in optical properties and no crack defect can be obtained.
摘要:
A ceramic material powder for a translucent ceramic is molded with a binder, and the resulting green compact is embedded in a ceramic powder having the same composition with the ceramic material powder. After removing the binder, the green compact embedded in the ceramic powder is fired in an atmosphere having an oxygen concentration higher than that in the removal procedure of the binder and thereby yields a translucent ceramic represented by Formula I: Ba{(SnuZr1-u)xMgyTaz}vOw, Formula II: Ba(ZrxMgyTaz)vOw or Formula III: Ba{(SnuZr1-u)x(ZntMg1-t)yNbz}vOw. The translucent ceramic has a refractive index of 1.9 or more and is paraelectric.
摘要翻译:用粘合剂将用于半透明陶瓷的陶瓷材料粉末模制,并将所得的生坯压坯与陶瓷材料粉末嵌入具有相同组成的陶瓷粉末中。 在除去粘合剂之后,将包埋在陶瓷粉末中的生坯在氧浓度高于粘合剂的除去程度的气氛中焙烧,从而得到由式I表示的半透明陶瓷:Ba {(Sn u 1 1 1 x u> 式II:Ba(Zr x Si y Ta z z)z H z, 或者式III:Ba({(Sn u Zr u u u u u u)x Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> w SUB>。 半透明陶瓷的折射率为1.9以上,为顺电性。
摘要:
A microcomputer comprising a CPU for outputting a signal requesting generation of pulses when receiving an erase signal requesting processing to initialize a flash memory unit; a timer for generating the pulses when receiving the signal requesting generation of the pulses output by the CPU wherein the frequency of a system clock is divided to produce clock pulses and each of the pulses is generated whenever the number of clock pulses reaches a set value; and a memory control unit for executing the processing to initialize the flash memory unit as well as measuring a time it takes to carry out the processing by counting the number of pulses output by the timer when receiving the erase signal.
摘要:
A ceramic material powder for a translucent ceramic is molded with a binder, and the resulting green compact is embedded in a ceramic powder having the same composition with the ceramic material powder. After removing the binder, the green compact embedded in the ceramic powder is fired in an atmosphere having an oxygen concentration higher than that in the removal procedure of the binder and thereby yields a translucent ceramic represented by Formula I: Ba{(SnuZr1-u)xMgyTaz}vOw, Formula II: Ba(ZrxMgyTaz)vOw or Formula III: Ba{(SnuZr1-u)xZntMg1-t)yNbz}vOw. The translucent ceramic has a refractive index of 1.9 or more and is paraelectric.
摘要翻译:用粘合剂将用于半透明陶瓷的陶瓷材料粉末模制,并将所得的生坯压坯与陶瓷材料粉末嵌入具有相同组成的陶瓷粉末中。 在除去粘合剂之后,将包埋在陶瓷粉末中的生坯在氧浓度高于粘合剂的除去程度的气氛中焙烧,从而得到由式I表示的半透明陶瓷:Ba {(Sn u 1 1 1 x u> 式II:Ba(Zr x Si y Ta z z)z H z, 或者式III:Ba({(Sn≡Z1)≡Z> w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w SUB>。 半透明陶瓷的折射率为1.9以上,为顺电性。
摘要:
A first balancer shaft includes a shaft extension portion extending forward, to which a driven sprocket is attached. A case member includes a first bearing portion supporting the balancer shaft near its weight portions and rotational gear and a second bearing portion supporting the same near its driven sprocket. The case member includes an upper case coupled to a cylinder block and a lower case facing to the upper case, and there is provided a case extension portion extending forward at the upper case. The first bearing portion is configured of a hole formed by half-split portions of the both cases and the second bearing portion is configured of a hole formed integrally at the case extension portion.
摘要:
The reliability of data read out from a flash EPROM is improved. The flash EPROM increases the reliability of stored data. A plurality of memory areas (1, 2, 3) includes a first memory (1) and a second memory area (2). Sense amplifiers (5-1, 5-2) are provided for the first and second memory areas (1, 2). A comparing device (6) is for comparing the data read out from the first and second memory areas (1, 2). A controlling device (9) selects either of the normal mode for independent utilization of the first and second memory areas (1, 2) and the high reliability mode for simultaneous utilization of the first and second memory areas (1, 2). In the high reliability mode, the controlling device (9) controls the first and second memory areas (1, 2) to store identical data, and controls the comparing device (6) a) to compare the data read out from the first and second memory areas (1, 2), and b) to output the data to the outer circuit, when the read out data are identical to each other.