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V (4.2 rad/hour), G (14.2 rad/hour) are connected by the smooth lines of the
corresponding color: zone of radiation hazard M – red; low radiation zone A –
blue; medium radiation zone B – green; high radiation zone V – brown; extreme
caution zone G – black.
According to the position of the object of economic activity (settlement)
relative to the boundaries zones of contamination can be determine the radiation
level at the facility on 1 hour after the accident, and on the contrary, according to
the level of radiation at the facility on 1 hour – to determine the zone of
contamination, in which the object was, and the place in the zone (on the outer
boundary, inside, on the inside boundary).

Table 8.3 – The coefficient for recalculation of radiation levels for
different time after an accident
t meas. , K tmeas. t meas. , K tmeas. t meas. , K tmeas. t meas. , K tmeas.
hour hour hour hour

0.4
With reactors VVER – 1000 (K tmeas. = (t meas. ) )

0.5 0.76 4 1.74 7,5 2.24 11 2.61

1 1 4.5 1.83 8 2.30 11.5 2.66

1.5 1.18 5 1.90 8,5 2.35 12 2.70

2 1.32 5,5 1.98 9 2.41 16 3.03

2.5 1.44 6 2.05 9,5 2.46 20 3.31

3 1.55 6.5 2.11 10 2.51 1 day 3.57

3.5 1.65 7 2.18 10,5 2.56 2 days 4.70

- 14 days 10.23

0.3
With reactors RBMK – 1000 (K tmeas. = (t meas. ) )

0.5 0.81 4 1.5 7.5 1.82 11 2.05

1 1 4.5 1.56 8 1.86 11.5 2.08

1.5 1.13 5 1.62 8.5 1.89 12 2.11

2 1.23 5.5 1.66 9 1.93 16 2.29

2.5 1.3 6 1.71 9.5 1.96 20 2.45

3 1.39 6.5 1.75 10 1.99 1 day 2.59

3.5 1.45 7 1.79 10.5 2.02 2 days 3.19

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