Map of Photon Dose Equivalent Rate (current situation)

Since the incident in Japan the National Radiation Protection Institute (SURO) has intensively monitored the situation and continuously evaluates information on the measurements of radioactivity on the territory of the Czech Republic.

The radionuclides in the air are monitored at 10 measurement sites (Praha, Hradec Králove, Usti n. L., Cheb, Kamenna, Ostrava, Holesov, Brno, Ceske Budejovice, Plzen) equipped with devices for aerosol sampling (high volume aerosol samplers: 2x Snow White, throughput of 2x900 m³/h, both at the same place in Prague and aerosol samplers Hunter with throughput of 150 m³/h working in Prague and at the other sampling sites in the Czech Republic).

The results of monitoring of air in the Czech Republic are shown in the figures:

Fig.1 Weekly (and shorter period) values of activity concentrations of ¹³⁷Cs, ⁷Be and ²¹⁰Pb in the aerosol in Prague during the last 18 months

(aerosol sampler Snow White, throughput 2x900m³/h)

MSA - minimum significant activity

Fig. 2 Maximum current activity concentrations of ¹³¹I, ¹³⁴Cs and ¹³⁷Cs in aerosol in the Czech Republic