Browsing by Author "Holland, PG"

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    The AAEC blowdown and containment rig.
    (Australian Atomic Energy Commission, 1982-04) Holland, PG
    The arrangement operation and associated instrumentation of the AAEC blowdown and containment rig up to mid-1980 is described. Details of typical experiments are given to illustrate applications. The rig consists of a 14 L high pressure vessel rated to operate up to 16 MPa at 340 degs. C and an 1800 L low pressure vessel having a maximum pressure rating of 450 kPa at 250 degs. C. The blowdown discharge rate can be controlled in various ways including flow through an 8 mm bore tube or one of a set of bevelled orifice plates with bores ranging from 2 to 8 mm. The variables usually measured are the pressure and temperature at selected positions as functions of time. Experimental results show among other things the considerable effect of the initial air pressure in the containment vessel on the maximum pressure attained and on the temperature distribution.
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    Measurement and reduction of flow-induced vibration of a fuel element and rig in the HIFAR Reactor
    (Australian Atomic Energy Commission, 1975-05) Holland, PG
    Flow-induced vibrations in the fuel element assembly of a research reactor were monitored and it was established that long-term monitoring of liner plug vibration can be used to indicate the mechanical integrity of a fuel element if a sufficient case history is established. The vibrational behaviour of a number if fuel elements with different integral modifications were examined but only a relatively small change in vibration levels was obtained. The overall vibration levels were most effectively decreased by installing flow straighteners in the exit nozzles of the plenum chamber.