Grafik: Überblick über die Messstationen für Radioaktivität in Nord- und Ostsee Messstationen Radioaktivität

Radioactivity monitoring network

The Federal Maritime and Hydrographic Agency (BSH) monitors radioactivity in the North Sea and Baltic Sea, including coastal waters. This is part of the overall task of "monitoring environmental radioactivity", which is carried out by federal authorities. This is regulated in the Radiation Protection Act (StrSchG).

The "Integrated Measurement and Information System for Monitoring Environmental Radioactivity (IMIS)" is a nationwide monitoring network for radioactivity in Germany, suspended from the Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU). The BSH acts as the control centre and acts as the Federal Monitoring Network head-end station.

Tasks of the BSH in IMIS

  • Monitoring for accidental high activity concentrations in the sea
  • Regular determination of nuclide-specific radioactivity in the sea (in water, suspended matter and sediment)
  • Prognosis of propagation in the event of an incident

Measuring stations

The radioactivity monitoring network consists of 7 oceanographic stations, 6 coastal stations and 3 navigating ship stations:

The high sea stations are operated in connection with the oceanographic measuring network of the BSH. They are mounted on unmanned equipment carriers (lightship replacement systems, buoy, lighthouse, measuring pole).

The coastal stations use fixed facilities on the coast (harbour pier, water gauge shaft, pier, seawater sampling point). The alarm sampling is carried out there by permanently accessible personnel.

Data evaluation

The control centre computers in the BSH automatically collect and evaluate the data coming from the measuring network stations. If the set alarm criteria are fulfilled, an internal alarm is triggered. After checking the increased measured values by analyzing the alarm sample, a warning message is forwarded to the central federal office in IMIS at the Federal Office for Radiation Protection (BfS) if necessary. In addition, the incoming monitoring data are regularly checked and evaluated for IMIS.