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100 APPENDIX IV
(c)
Monitoring of soil, flora and agricultural products
(Table XVIII)
This is the measurement programme that has been extended
most. As the critical pathway for the uptake of I as critical
fission product is generally milk consumption, special importance
had already been attached to monitoring of the food chain pasture
soil- grass-milk. The number of farms under surveillance was
increased to five and the Julich dairy was included in the measurement
programme, an agreement having been reached with it whereby
samples of the milk supplied by the approximately 40 farms situated
within 4 km of KFA are made available for analysis. The special
importance attached to the monitoring of grass and milk is indicated
by the fact that measurements are carried out every 14 days during
the grazing season, by the gamma-spectrometric determination of
individual nuclides in composite samples and, above all, by the
■I o i
radiochemical determination of I in individual milk samples.
Environmental Monitoring Programme of the Karlsruhe
Nuclear Research Center
Environmental monitoring of the Karlsruhe Nuclear Research
Center is conducted in accordance with the programme approved
in February 1969 by the Ministry of Labour and Social Affairs of
Baden-Wurttemberg [1].
The programme comprises two parts: I. Direct measurement
of radiation; and II. Measurements of activity. While Part I is
concerned with the evaluation of possible hazards to man caused by
external irradiation effects, and with the determination of dose
values, Part II covers the assessment of a possible incorporation
hazard to man by determination of the content of radioactivity in
several media taken in by man directly or indirectly. Tables XXI
and XXII present a rough sketch of the monitoring programme.
Apart from the routine programme additional surveillance
measurements are made at special events, e. g. air humidity
tritium measurements at routine changes of fuel elements in the
heavy-water moderated research reactor FR 2.