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1. 发明专利

GB912659A Improvements in or relating to nuclear reactor fuel element charging and dischargingarrangements 未知
公开(公告)号：GB912659A
公开(公告)日：1962-12-12
申请号：GB1227758
申请日：1958-04-17
申请人： ATOMIC POWER CONSTR LTD , JAMES WILFRED ASHLEY , PETER DEAN HODSON , FREDERICK JOHN ROGERS , MAURICE WILLIAM NICHOLS
IPC分类号： G21C19/02 , G21C19/20
摘要： 912,659. Servicing reactors. ATOMIC POWER CONSTRUCTIONS Ltd., ASHLEY, J. W., HODSON, P. D., ROGERS, F. J., and NICHOLS, M. W. April 17, 1959 [April 17, 1958], No. 12277/58. Class 39 (4). The lower ends of fuel element channels 5 (only one shown) in the reactor core 4 have extensions 17 leading to one of a number of selectors 16, each selector serving a group of channels, e.g. 315 channels, the lower ends 19 of the extensions 17 of a group being arranged on nine concentric circles each circle having thirty-five ends 19. A rotatable plug 20 in the selector has nine passages 21, the passage entries 22 lying on a common radius but the passage ends 23 each lying on a different radius corresponding to the radii of the circles on which the ends 19 are located. A lower rotatable plug 24 has a single passage 25 having a central entry 26 and an exit 27 lying on a circle having the same radius as that of the entries 22. The channel 5 to be loaded or unloaded is selected by rotation of the plugs 20, 24 and a flexible probe 14 is brought out from a dispenser 15 to support the lower end of the fuel elements 28. A charge machine 9 movable over the shield 3 is aligned with a selected hole 8 and standpipe 10 (only one hole and one standpipe being shown) and a pantograph 13 is lowered from the machine and extended to be in alignment with the channel 5 from which the fuel elements are to be discharged. The probe 14 then lifts the fuel elements 28 in the selected channel so that the upper fuel element is received in the pantograph 13, the latter being retracted so that the element may be lifted by a hoist into the machine 9. In a charging operation the process is reversed, the fuel elements being lowered singly into the pantograph which is then extended and the fuel element lowered into the channel by withdrawing the probe 14.

2. 发明专利

GB911200A Improvements in or relating to restraint bands for graphite assemblies of nuclear reactors 未知
公开(公告)号：GB911200A
公开(公告)日：1962-11-21
申请号：GB531658
申请日：1958-02-18
申请人： ATOMIC POWER CONSTR LTD , JAMES WILFRED ASHLEY , LESLIE JAMES KNIGHT
IPC分类号： G21C5/08
摘要： 911,200. Links. ATOMIC POWER CONSTRUCTIONS Ltd., ASHLEY, J. W., and KNIGHT, L. J. Feb. 18, 1959 [Feb. 18, 1958], No. 5316/58. Class 80 (3). [Also in Groups XXV and XXXII] A resilient band for restraining the graphite structure of a nuclear reactor is formed of a number of links pivoted together, each link comprising a nest of coaxial tubes 1, 2, 3 and rods 4 . . . 13, the rods and tubes being held between pairs of end-plates 14... 20 which transmit the load successively between rods in tension and tubes in compression to give the resilient effect of a long link. As shown the nine rods 4... 12 are arranged in groups of three around the three nested tubes 1, 2, 3 and central rod 13. The tensile load is transmitted from coupling 24 as tension along central tie-rod 13 to end-plate 20, as compression in tube 1 to end-plate 14, as tension in three tie rods 6, 9, 12 (12 shown in Fig. 3) to end-plate 18, as compression in tube 2 to end-plate 15, as tension in tie rods 5, 11, 8 (8 shown in Fig. 1) to end-plate 17, as compression in tube 3 to end-plate 16, as tension in tie rods 7, 10, 4 (4 shown in Fig. 1) to end-plate 19 on coupling 21. The wall of each tube is thicker than that of the tube surrounding it so that each tube is better able to withstand corrosion than the tube surrounding it. The tubes may be of stainless steel and the rods of mild steel for temperature compensation. As shown, tube 1 is of mild steel and tubes 2, 3 of stainless steel. In the event of failure of one or more of the tubes the tensile stress is transmitted directly between the couplings 21, 24 by the central rod 13. In a modification the link comprises a single tube held between two endplates, one of which is coupled to a set of tie rods and the other of which is coupled either to a single central rod or a further set of rods. Specification 782,922 is referred to.

3. 发明专利

GB867241A Improvements in or relating to nuclear reactors 未知
公开(公告)号：GB867241A
公开(公告)日：1961-05-03
申请号：GB1500658
申请日：1958-05-09
申请人： ATOMIC POWER CONSTR LTD , INT COMBUSTION HOLDINGS LTD , JAMES WILFRED ASHLEY , EDWARD FLEETWOOD PELLEW BENNET
IPC分类号： G21C1/20
摘要： 867,241. Nuclear reactors. ATOMIC POWER CONSTRUCTIONS Ltd., INTERNATIONAL COMBUSTION (HOLDINGS) Ltd., ASHLEY, J. W, and BENNETT, E. F. P. May 8, 1959 [May 9, 1958 (2)], Nos. 15006/58 and 15007/58. Class 39(4). In a nuclear reactor having fissile fuel elements arranged within coolant channels and moderated by a liquid around the channels, heat is removed from the reactors by moderator vapour coolant passing in closed circuit through the channels. In Fig. 1 the pressure vessel 1 contains a moderate tank 4 filled with water which is cooled by circulation through a heat exchanger 5. Tubes 12 containing fuel elements pass through the tank 4 and connect the space above the tank to a leader 14 disposed below the tank. Steam coolant is circulated through the reactor and heat exchanger 10 by a blower 18. If the moderator is heavy water, the steam should be heavy water steam, but if the moderator is ordinary water the steam is ordinary steam and the fuel elements should contain enriched uranium. The tubes 12 are constructed in segmental assemblies which fit into leader 14. A hole 16 at the top of the pressure vessel, normally closed by a cap, is wide enough to allow a segmental assembly to be withdrawn for routine maintenance.

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