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In the National Board of Nuclear Safety and Radiation Protection of the GDR solid state nuclear track detectors (SSNTD) have been used routinely both for individual neutron dosimetry and for long-term measurements of radon and radon daughter products in flats and in the environment. For neutron monitoring a fission track dosemeter is used for the simultaneous response to fast and intermediate neutrons, using Makrofol KG as a detector. The long-term dosemeter for registering radon and radon daughter products is based on the diffusion chamber principle. Makrofol DE 1-4 of 300 µm thickness is used as the detector. Detector evaluation and calibration methods are described in detail and detection limits are stated. In addition, a screening measuring method based on CR-39 is presented, allowing the rational performance of long-term measurements by radon diffusion chambers.

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