Generic Procs for Monitoring in a Nuclear, Radiological

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Extra info for Generic Procs for Monitoring in a Nuclear, Radiological Emergency (IAEA TECDOC-1092)

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Discussion Environmental dosimetry placements in and around a suspected plume deposition area is recommended. Care has to be exercised in choosing TLDs suitable for environmental monitoring. 1. 2. 3. 4. 5. Receive an initial briefing and initial assignments from the Environmental Analyst/Radiological Assessor. Obtain appropriate equipment and TLDs using Checklists AO and Al. Check the instruments using Procedure AO. Conduct the radio check when leaving for the assignment. Conduct a GPS check when leaving for the assignment.

1. 46 Hold the instrument away from the body and rotate the body until the minimum reading (for most instruments the minimum is when the back of the instrument is to the source and the body is giving added shielding). At the minimum a line from the instrument through the centre of the body will give the direction of the source (very approximately). Procedure A4, Pg. 2. Alternatively a circle of same dose rate points can be measured around the source and the source is assumed at the approximate centre of the circle.

2 of 8 In fallout mapping, the flight line direction should be approximately at right angles to the wind and downwind from the source for the wind, which was blowing at the time of plume passage. Wide line spacing can be used for initial assessment followed by closer line spacing for finer mapping. It is difficult to give detailed procedures for all possible types of airbourne spectrometer systems and the corresponding procedures for the evaluation of the measured data. ) are collected and stored simultaneously with the radiation data.

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