20:24 Oct 3, 2016 |
English language (monolingual) [PRO] Science - Nuclear Eng/Sci | |||||||
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| Selected response from: Didier Fourcot Local time: 14:10 | ||||||
Grading comment
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SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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3 +2 | best estimate of the characteristics of release events in a nuclear accident |
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4 +1 | order, timing and quantity of the release of radioactive sources |
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Discussion entries: 1 | |
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best estimate of the characteristics of release events in a nuclear accident Explanation: Slides 10 and 11 of the presentation referenced below give some indication of what is meant. It seems a source term refers to a single event of release of radioactive material and a source sequence is a sequence of such events within a geographical area and time span sufficiently small to be regarded as a single episode (i.e. accident). A source term is characterised by its geographic location, duration of the event, rate of release (which varies during the event), kind of radioactive material released etc. It seems from slide 11 that there were four events in Fukushima (each contributing one term to the source sequence): explosions at Reactors 1, 3 and 2 respectively (in that order), followed by a fire near Reactor 4. A best estimate source sequence is just that, a source sequence constructed as well as one can from measurements taken near the site. https://www.wmo.int/pages/prog/sat/meetings/documents/CBS-MG-12_Doc_03-01-08_EER.ppt |
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12 hrs confidence: peer agreement (net): +1
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