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EVIDOS Informe resumido

Project ID: FIKR-CT-2001-00175
Financiado con arreglo a: FP5-EAECTP C
País: Germany

Reference values for personal dose equivalent and other radiation protection quantities

Based on the spectrometric information collected in the different workplaces with mixed neutron-photon radiation, reference values for different radiation protection quantities (ambient dose equivalent, H*(10), personal dose equivalent, H(p)(10),and effective dose, E) were compiled. The results were published in the open literature.

The reference method used to determine H*(10) of neutrons in unknown radiation fields was Bonner sphere (BS) spectrometry. BS spectrometry was chosen for this project because it is well established, it has been benchmarked against other methods, e.g. calculations, and it allows H*(10) to be determined with small uncertainties in the order of 5% (one relative standard uncertainty) provided that the response matrix of the spectrometer is known precisely and that data analysis is performed carefully.

A reference method to determine H(p)(10) does not exist, yet. The direction spectrometers developed in this project are still research tools for which further validation is needed. The results from these instruments was improved by using angle integrated spectra from BS as pre-information. In this case, the uncertainties are in the order of 30%. The results were in agreement with those from transport calculations performed for simulated workplace fields and for workplace fields at the VENUS research reactor.

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PHYSIKALISCH-TECHNISCHE BUNDESANSTALT
Bundesallee 100
BRAUNSCHWEIG
Germany
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