| 摘要 |
<p>PURPOSE:To decrease interference and complete the setting of assembly in once even with a lot of burnable poison rods by providing inner frame parts with reducing inclination and separating the guide path. CONSTITUTION:When a burnable poison assembly is hung down in a volume reducing guide G1, the inside burnable poison rods W2 are guided by the inner parts (guide tube) S1 to be reduced independently and therefore, there is no chance of interfering with the outside rods W1 on the way. On the other hand, the outside rods W1 is reduced along the inner wall of the inclined part T, obstracted by the guide tube 51 on the way without a chance of interfering with the opposit rods W1. Thus, they are separated to a group of the little number of rods W1 touching due to the hanging down of the burnable poison assembly and are guided along the outshape of the guide tube S1, Therefore, even in the case an assembly with many number of rods is hung down to set in the device G1, there is no possiblity of interference of rods causing an unavailable hanging down of the assembly and the setting is completed in once.</p> |
