| 摘要 |
<p>1,102,235. Reactor control rods. ALLM€NNA SVENSKA ELEKTRISKA A.B. 8 June, 1965 [9 June, 1964], No. 24093/65. Heading G6C. A reactor control rod comprises a number of absorber blades fastened to a supporting member in such a way as to have a certain freedom of movement in relation to the supporting member. In one embodiment (Figs. 1 and 2, not shown), a central body 2 extends from a part 1 along the whole length of the rod and is provided with longitudinal grooves 3, each receiving an edge of an absorber blade 4. The blades 4 are provided at their ends with attachment plates 5, 6 of which the plates 5 are welded to the part 1. Each plate 5 comprises a narrow arm 8 which, owing to its elasticity, gives considerable freedom of movement to the attached blade 4. At their opposite ends, the blades 4 have even greater freedom of movement through the attachment plates 6 being mounted on the central body 2 by means of bearings 9 which allow turning movements as well as axial displacement of the blades 4. The blades 4 can be made relatively thin so that the entire control rod obtains still greater flexibility. The purpose of the invention is to allow the slots in the reactor core which receive the control rods to be made considerably narrower than has hitherto been possible without jamming of the rods occurring. The attachment plates 5, 6 are provided with guiding slide discs 10 which are dimensioned with reference to the smallest width of slot which can possibly occur in the reactor core. In an alternative embodiment, a central bar-like supporting member is fastened to the absorber blades only at the ends of the latter, the absorber blades between their ends being allowed freedom of movement at right-angles to the blade planes. The supporting member may be provided with guiding elements, such as resilient lugs or rollers, for guidance against suitable guiding surfaces in the reactor core.</p> |
