—— BODY BURDEN OF '°’Cs IN FINNISH LAPPS IN APRIL 1977 PoreOtten, ed eee: é‘\ - Preliminary results M. Tillander, T. Jaakkola and J.K. Miettinen Se ewe rs wt Department of Radiocuemistry University of Helsinki Helsinki, Finland In the spring of 1977 the annua] measurement of the 1376, body burdens y of Finnish mountain Lapps was again carried out utilizing the same i mobile whole~body counting laboratory described in previous reports ¥ and publications (1,2). Only those Lapps resident in Inari and occupied with reindeer herding were called to be measured. 3] subjects were i counted, all of whom had also been measured in 1976. The results were a calculated on the Burroughs 6700 computer of the University of Helsinki ie 5 (5.66 kBq) representing 90% of the average value for the same subjects one year previously, 170 nCi (6.29 kBq). For the reindeer herding group (7.33 kBq) representing 86% of the 1976 average for the same subjects. Of 31 subjects 18 exhibit decrease in their individual '3705 body 2 TY burdens, two persons retaining only 59% of the previous content, and 13 persons have increased body burdens; one subject having 2./ times. iH the amount found in 1976. of the Lapps seem to be dependent on the reindeer herding district where they live, as indicated in Figure 1. The 1376, contents of. the Lapps in the herding district of Muddusjarvi were increased in all cases i ~ the communities of Utsjoki, Inari and Enontekic there are 10 such 137 districts, "grazing associations". The changes in the Cs body burden - Finnish Lapland reindeer herding is organized by districts. In | . In ab wees aeoe ee SRN On reer the decrease is somewhat larger, from 229 nCi (8.47 kBq) to 198 nCi ee een Ft eeey ne emer we 153 nCi ee and 2. The average 1376. body burden for the whole group was Het 1 |! tte ee a utilizing a spectrum stripping program and are presented in Tables | . ; eg