| 摘要 |
1,237,536. Monitoring reactors. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. 25 July, 1968 [14 Aug., 1967], No. 37329/67. Heading G6C. Failed fuel assemblies in a sodium-cooled fast reactor (Fig. 6, not shown) are detected by connecting each assembly by an individual sample pipe to a detecting apparatus, the pipe supplying to the apparatus a sample of the sodium coolant which has flowed through the associated fuel assembly. The detecting apparatus (Figs. 1-5, not shown) includes a motor-driven conduit which is sequentially connected in turn to each of the sample pipes, the conduit being associated with a set of delayed neutron detectors connected via amplifiers to recording equipment. Also, a larger diameter, stationary, conduit receives the combined samples from all the sample pipes, this larger conduit being associated with a further set of delayed neutron detectors. The detecting apparatus thus provides for continuous sampling of the fuel assemblies individually simultaneously with and independently of the continuous sampling of all the fuel assemblies in bulk. As shown, the neutron detectors are of the boron trifluoride type.
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