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Radiation losses are determined according to the table 8.10 depending on the
total received exposure doses for a certain period of stay in the contamination
zone. Total dose consists of the estimated forecasted dose of radiation determined
in the paragraph 4, and the residual dose (if people received some dose before) D
res.
(see note to the table 8.10).
Ten percent of the received dose by the human body is not restored.
The total dose consists of the estimated dose and the residual dose:
D =D +D , rad (8.12)
Σ
res.
est.
8. Definition of the required number of work shift to complete the full scope
of work in the contamination zone.
To exclude re-irradiation of man when performing a given volume works in
conditions of radioactive contamination of the area arrange changeable work for
the correct distribution of forces by work shifts.
So, to determine the number of work shift, use the following output data:
P – radiation level on 1 hour after the accident, rad/hour;
1
t – the duration of the full scope of work, hour;
w
t start – start time of the work after an accident, hour;
D – established dose of radiation, rad;

est.
K red. – coefficient of reduction of radiation levels by buildings, structures and
vehicles, in which people wiil be worked.

Figure 8.3 – Graph for determining the length of stay in the radioactive
contamination area during the NPP accident with VVER-1000 reactor

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