English Abstract This report contains the results of exposure rate
measurements carried out during 1989 at the site of the National Institute
of Public Health and Environmental Protection. The exposure rates were
determined by means of thermoluminescence dosimeters on a number of
locations. One of these locations was meant for determination of the
natural background (reference) on the site. The exposure rates appeared not
to deviate significantly from the natural background levels in the
Netherlands. The small increase of the annual mean of the exposure rate
near the building Sg, with regard to the reference level, is due to
irradiation activities for calibration work.
