| 摘要 |
<p>1,145,617. Controlling reactors. ATOMIC ENERGY OF CANADA Ltd. 23 May, 1967 [8 July, 1966], No. 23847/67. Heading G6C. In a nuclear reactor control system, a neutron absorbing liquid is displaceable in a U-tube, 17, within the core. The absorber 11 is contained in a reservoir 10, external to, and above, the core and is supported there by helium gas pressure in the U-tube and the tube 22. Rapid reactor shut-down is effected by gravitational movement of 11 downwards into the core, upon the opening of valve 24. Criticality is resumed by the slow pumping of the fluid 11 upwards into 10 through the small bore tube 18, the valve 24 being closed. Gas pressure from pipe 26 communicates, through tube 27, with port 14 and the liquid surface 15 to maintain the liquid within 10. Expulsion of liquid 11 during boiling is prevented by float valves 13, 23.</p> |
