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Title: Incidence of neoplasms in ages 0-19 Y in parts of Sweden with high {sup 137}Cs fallout after the Chernobyl accident

Abstract

The incidence of neoplasms in childhood and adolescence in northern and central Sweden before and after the radioactive fallout from the Chernobyl accident was investigated in an ecologic study, 1978 to 1992. The study included all parishes in the six most contaminated counties classified after aerial mapping of ground radiation form {sup 137}Cs and investigated 746 cases of neoplasms in ages 0-19 y, diagnosed in the six counties. Incidence and relative risks of neoplasms were compared in areas with high, intermediate, and low contamination after versus before the Chernobyl accident in 1986. A continuous increase of brain tumor incidence in the ages 0-19 y during the period 1978-92 without clear relationship to the Chernobyl fallout was discovered. No clear relationship between the incidence of brain tumor and the exposure to varying levels of radiation from {sup 137}Cs was apparent. A some-what decreased relative risk of acute lymphatic leukemia appeared in areas with increased exposure. Other neoplasms showed no changes in incidence over time or with regard to exposure. Until now, there is no indication that the Chernobyl accident has affected the incidence of childhood and adolescence neoplasms in Sweden, but it is still too early for any final conclusion aboutmore » the effect of this event. 12 refs., 1 fig., 2 tabs.« less

Authors:
; ; ;  [1]
  1. Univ. Hospital, Linkoeping (Sweden) [and others
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
420446
Resource Type:
Journal Article
Resource Relation:
Journal Name: Health Physics; Journal Volume: 71; Journal Issue: 6; Other Information: PBD: Dec 1996
Country of Publication:
United States
Language:
English
Subject:
56 BIOLOGY AND MEDICINE, APPLIED STUDIES; BRAIN; NEOPLASMS; DISEASE INCIDENCE; CHILDREN; RADIATION DOSES; FALLOUT; LEUKEMIA; SWEDEN; CONTAMINATION; CESIUM 137

Citation Formats

Tondel, M., Flodin, U., Skoeldestig, A., and Axelson, O.. Incidence of neoplasms in ages 0-19 Y in parts of Sweden with high {sup 137}Cs fallout after the Chernobyl accident. United States: N. p., 1996. Web. doi:10.1097/00004032-199612000-00012.
Tondel, M., Flodin, U., Skoeldestig, A., & Axelson, O.. Incidence of neoplasms in ages 0-19 Y in parts of Sweden with high {sup 137}Cs fallout after the Chernobyl accident. United States. doi:10.1097/00004032-199612000-00012.
Tondel, M., Flodin, U., Skoeldestig, A., and Axelson, O.. 1996. "Incidence of neoplasms in ages 0-19 Y in parts of Sweden with high {sup 137}Cs fallout after the Chernobyl accident". United States. doi:10.1097/00004032-199612000-00012.
@article{osti_420446,
title = {Incidence of neoplasms in ages 0-19 Y in parts of Sweden with high {sup 137}Cs fallout after the Chernobyl accident},
author = {Tondel, M. and Flodin, U. and Skoeldestig, A. and Axelson, O.},
abstractNote = {The incidence of neoplasms in childhood and adolescence in northern and central Sweden before and after the radioactive fallout from the Chernobyl accident was investigated in an ecologic study, 1978 to 1992. The study included all parishes in the six most contaminated counties classified after aerial mapping of ground radiation form {sup 137}Cs and investigated 746 cases of neoplasms in ages 0-19 y, diagnosed in the six counties. Incidence and relative risks of neoplasms were compared in areas with high, intermediate, and low contamination after versus before the Chernobyl accident in 1986. A continuous increase of brain tumor incidence in the ages 0-19 y during the period 1978-92 without clear relationship to the Chernobyl fallout was discovered. No clear relationship between the incidence of brain tumor and the exposure to varying levels of radiation from {sup 137}Cs was apparent. A some-what decreased relative risk of acute lymphatic leukemia appeared in areas with increased exposure. Other neoplasms showed no changes in incidence over time or with regard to exposure. Until now, there is no indication that the Chernobyl accident has affected the incidence of childhood and adolescence neoplasms in Sweden, but it is still too early for any final conclusion about the effect of this event. 12 refs., 1 fig., 2 tabs.},
doi = {10.1097/00004032-199612000-00012},
journal = {Health Physics},
number = 6,
volume = 71,
place = {United States},
year = 1996,
month =
}
  • The impact of the Chernobyl accident on Sweden is presented in the following areas of interest: early chronology of the emergency in Sweden, emergency organization, results of ground and air measurements impact on foodstuffs, countermeasures and their effects, estimated radiation doses, and information to the public.
  • Radionuclide fallout from the burning Chernobyl reactor provided a pulsed input of {sup 137}Cs to surface waters and watersheds of Europe. Radionuclide analyses of surface waters indicated that initial rates of decrease of {sup 137}Cs concentrations in contaminated rivers were on the order of 0.125 day{sup {minus}1}, which was found to be consistent with the size of the mobile inventory in the watersheds (i.e., {approximately}1% of total) and with the initial dilution rate (i.e., {approximately} 0.5 m{sup {minus}1}) in river water. Analysis of {sup 134}Cs and {sup 137}Cs in waters from five different lakes in Switzerland and of settling particlesmore » collected in sediment traps from one of the lakes, Lake Zurich, revealed relatively fast whole-lake removal rates. Residence times of {sup 137}Cs in the five study lakes ranged from 5 to 21 months. Horizontal boundaries in this lake appeared to have acted first as sinks of Chernobyl {sup 137}Cs from the upper water column and later as sources of {sup 137}Cs to deeper parts of Lake Zurich. Rates of adsorption/desorption of {sup 137}Cs associated with settling particles, when compared in subsurface waters to those of uptake/release by other processes occurring in the lake, were found to be small.« less
  • The level of radiation exposure in children in Belarus caused by the Chernobyl accident was investigated on the basis of whole body {sup 137}Cs count. The subjects were 10,062 children (4,762 boys and 5,300 girls) in Mogilev and Gomel, Belarus, who received Chernobyl Sasakawa Health and Medical Cooperation Project health examinations from May 1991 to December 1992 and who were 5-16 y old at the time of examination. The median whole body {sup 137}Cs count per body weight varied from 21-48 Bq kg{sup {minus}1} and from 28-126 Bq kg{sup {minus}1} in Mogilev oblast and Gomel oblast, respectively. (The {open_quotes}oblast{close_quotes} ismore » the largest administrative district constituting the country. Belarus consists of 6 oblasts). Corresponding annual effective dose equivalents were all less than the public dose limit of 1 mSv y{sup {minus}1}, but the observed levels in the children were considerably higher than the average level of 2.3 Bq kg{sup {minus}1} reported in the past for the former Soviet Union. 6 refs., 4 figs., 1 tab.« less
  • Results are presented from reconnaissance by automobile and foot of the western regions of the Leningrad district, the northwestern regions of the Novgorod district, and the Novozykovsk region of the Bryansk district. Sites of soil contaminated by radionuclides are determined. The main contaminants of the studied regions are{sup 137}Cs and {sup 134}Cs. The activity ratio between these enables the contamination to be assigned a Chernobyl origin. Data are presented for the {sup 137}Cs distribution among the soil fractions. The thinnest fraction that is the most active of the studied samples (Novye Bobovichi village, Bryansk district) contains condensed and fuel falloutmore » components. The vertical migration of {sup 137}Cs in the various soil types is studied. The principal amount of {sup 137}Cs (up to 80-90%) in the fall of 1992 in virgin parts was concentrated in the upper soil layers (0-6 cm).« less
  • Results are presented for the speciation of {sup 137}Cs in vertical cross sections in a former tilled field in turf-podzol soil, in a swampy part in turf, and in a sandy soil 4 km to the northwest of Novye Bobovichi village of the Novozybkovsk region of Bryansk district. Although species of {sup 137}Cs potentially capable of migration are found in the soil samples, the principal part of the {sup 137}Cs ({ge}90%) in the autumn of 1992 was firmly bound to the soils. The principal part of the {sup 137}Cs is firmly bound to the mineral component of the soil. Itmore » is concluded that in the foreseeable future {sup 137}Cs in the soil systems of Bryansk district will be biologically unavailable and immobile.« less