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Tracking gaseous radioactivity through a spallation neutron source from origin to discharge
1Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, UK.
None:
An exercise has been carried out at the ISIS Spallation Neutron Source to track quantitatively the progress of radioactive air all the way from the machine areas where gaseous radioactivity is generated to the discharge stack from which gaseous radioactivity is vented to atmosphere. Calculations and measurements have been found to agree to within a factor ∼2, which is regarded as satisfactory in view of the many uncertainties involved and the approximations and assumptions that have had to be made in order to make the exercise tractable. A satisfying corollary is that the entire 'life cycle' of gaseous activity within ISIS, from generation through to discharge, is well understood.
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