Published August 1969 | Version v1
Report Open

Measurement by γ spectrometry of specific activities of radioisotopes present in vegetal ashes. Study of variations of the ambient radioactivity level in the Grenoble transverse valley from March 1966 to August 1968

Creators

  • 1. Centre d'Etudes Nucleaires de Grenoble, Service de Protection et des Laboratoires de Haute Activite (France)
  • 2. Centre d'Etudes Nucleaires de Grenoble, Laboratoire de Biologie Vegetale (France)

Description

The first part of this report addresses the dosimetry of γ emitting radio-elements which are present in vegetal samples. The dose measurements were performed by spectrometry and results were processed by using a least square method. The second part reports works performed in the Grenoble transverse valley by using the same techniques. Radioactivity fluctuations of various radio-elements (40K, 54Mn, 95Zr + 95Nb, 103Ru + 106Rh, 137Cs, 137Ba, 140Ba + 140La, 144Ce + 144Pr) in various vegetal species, in water and in sediments have been monitored in seven points of the Isere river banks, upstream and downstream the city of Grenoble, from March 1966 to August 1968. Fluctuations observed for each radio-element are explained by comparison with physiologic, hydrologic and atmospheric climate conditions. The principles of a systematic control of a site for the detection of possible radioactive pollutions are then defined

Abstract (French)

La premiere partie de cette note traite de la dosimetrie des radioelements emetteurs γ presents dans des echantillons de vegetaux par spectrometrie suivie d'un depouillement, par la methode des moindres carres, a l'aide d'un ordinateur. La seconde partie expose les travaux qui ont ete realises dans la Cluse de Grenoble grace aux techniques precedemment decrites: les fluctuations de la radioactivite due principalement a 40K, 54Mn, 95Zr+95Nb, 103Ru+106Rh, 137Cs, 137Ba, 140Ba+140La, 144Ce+144Pr dans quelques especes vegetales (notamment Alnus Incana L., Populus Nigra L., Salix Alba L., Phragmites Communis Trin., Solidago Serotina.), dans l'eau et les sediments, ont ete suivies en sept points des berges de l'Isere repartis en amont et en aval de Grenoble, de mars 1966 a aout 1968. Pour chacun des principaux radioelements, il est possible d'expliquer ces fluctuations en les confrontant avec les donnees climatiques atmospheriques, hydrologiques et physiologiques connues. Les principes du controle systematique d'un site en vue de la detection d'eventuelles pollutions radioactives sont ensuite poses. (auteurs)

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Additional details

Additional titles

Original title (French)
Mesure par spectrometrie γ des activites specifiques des radioisotopes presents dans les cendres de vegetaux. Etude des variations du niveau de la radioactivite ambiante dans la cluse de Grenoble de mars 1966 a aout 1968

Identifiers

URL
http://www.iaea.org/inis/Contacts/;

Publishing Information

Imprint Pagination
44 p.
Report number
CEA-N--1088

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
46034797
Subject category
S54: ENVIRONMENTAL SCIENCES; S61: RADIATION PROTECTION AND DOSIMETRY;
Descriptors DEI
ACTIVITY LEVELS; ASHES; BARIUM 137; BARIUM 140; CEA GRENOBLE; CERIUM 144; CESIUM 137; ECOSYSTEMS; GAMMA DOSIMETRY; LANTHANUM 140; MANGANESE 54; NIOBIUM 95; PLANTS; POTASSIUM 40; PRASEODYMIUM 144; RADIATION MONITORING; RADIOBIOLOGY; RADIOECOLOGY; RADIOISOTOPES; RADIONUCLIDE MIGRATION; RHODIUM 106; RIVERS; RUTHENIUM 103; SEDIMENTS; VALLEYS; VARIATIONS; ZIRCONIUM 95
Descriptors DEC
ALKALINE EARTH ISOTOPES; BARIUM ISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; BIOLOGY; CEA; CERIUM ISOTOPES; CESIUM ISOTOPES; COMBUSTION PRODUCTS; DAYS LIVING RADIOISOTOPES; DOSIMETRY; ECOLOGY; ELECTRON CAPTURE RADIOISOTOPES; ENVIRONMENTAL TRANSPORT; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; FRENCH ORGANIZATIONS; HOURS LIVING RADIOISOTOPES; INTERMEDIATE MASS NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; LANTHANUM ISOTOPES; LIGHT NUCLEI; MANGANESE ISOTOPES; MASS TRANSFER; MINUTES LIVING RADIOISOTOPES; MONITORING; NANOSECONDS LIVING RADIOISOTOPES; NATIONAL ORGANIZATIONS; NIOBIUM ISOTOPES; NUCLEI; ODD-EVEN NUCLEI; ODD-ODD NUCLEI; POTASSIUM ISOTOPES; PRASEODYMIUM ISOTOPES; RADIOISOTOPES; RARE EARTH NUCLEI; RESIDUES; RHODIUM ISOTOPES; RUTHENIUM ISOTOPES; SECONDS LIVING RADIOISOTOPES; STABLE ISOTOPES; SURFACE WATERS; YEARS LIVING RADIOISOTOPES; ZIRCONIUM ISOTOPES

Optional Information

Notes
15 refs.; Available from the INIS Liaison Officer for France, see the 'INIS contacts' section of the INIS website for current contact and E-mail addresses: http://www.iaea.org/inis/Contacts/