Community Research and Development Information Service - CORDIS


If radioactive waste is to be stored in deep ocean sediment beds, it will be sealed into a torpedo-shaped device (a penetrator) which, when dropped into the sea, will bury itself to a considerable depth in the sediment. It is essential that the hole made by the entry of the penetrator closes up again to form an effective seal. This report describes initial work on the development of an impedance antenna to detect and measure hole closure. The first phase of the work was concerned with the definition of the measurement problems by means of fluid dynamic modelling; this showed very strong dependence on the characteristics of both the antenna and float and was therefore left in abeyance until the design for these was complete. Modelling of three antenna types led to the selection of the "Tiger Tail" antenna, on grounds of sensitivity of potential as information source. Mechanical design work has been completed and electronic design is underway.

Additional information

Authors: FORTESCUE T R, Thurning Instruments Ltd., Wootton Fitzpaine, Bridport, Dorset (GB)
Bibliographic Reference: EUR 12777 EN (1991) Phase I, 56 pp., MF, ECU 4, blow-up copy ECU 7.50
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