Pyrolytic method of tritium detection in a graphite matrix
Creators
- 1. Kernforschungsanlage Juelich G.m.b.H. (F.R. Germany). Inst. fuer Physikalische Chemie
Description
The method described below can be used for absolute measurements of the tritium content in the graphite moderator of gas-cooled high-temperature reactors. The graphite specimen is pyrolysed at a temperature of about 8000C in a specially developed quartz apparatus, and the combustion gases are led into phosphorus pentoxide absorption tube across a quartz wool filter which retains solid fission and activation products. The contents of this tube are dissolved in H2O, and the tritium content of the solution is determined by scintillation measurements. Factors influencing the method as well as its reproducibility and yield are discussed. Decontamination factors of < 104 are reacted for the fission products. At very high concentrations of fission products, corrections can be made by γ-spectrometry or Cerenkov measurements. (RB/AK)
Availability note (English)
MF available from INIS under the Report Number.Abstract (German)
Das hier beschriebene Verfahren eignet sich zur Absolutmessung des Tritiumgehaltes in Moderatorgraphit gasgekuehlten Hochtemperaturreaktoren. In einer dazu entwickelten Quarzapparatur wird die Graphitprobe bei ca. 8000C pyrolytisch aufgeschlossen und die Verbrennungsgase ueber ein Quarzwollefilter - das feste Spalt- und Aktivierungsprodukte zurueckhaelt - in ein Phosphorpentoxid-Absorptionsrohr geleitet. Der Inhalt dieses Rohres wird in H2O geloest und der Tritiumgehalt der Loesung durch Szintillationsmessung bestimmt. Die die Messung sowie ihre Reproduzierbarkeit und die Ausbeute beeinflussenden Faktoren werden diskutiert. Bezueglich der Spaltprodukte werden Dekontaminationsfaktoren < 104 erreicht. Bei sehr hohen Spaltproduktkonzentrationen ist durch γ-Spektrometrie oder Cerenkovmessung eine Korrektur moeglich. (RB)
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Additional details
Additional titles
- Original title (German)
- Pyrolytische Methode zur Tritiumbestimmung in Graphitmatrix
Publishing Information
- Imprint Pagination
- 13 p.
- Report number
- AED-Conf--75-404-007
Conference
- Title
- General meeting of the Gesellschaft Deutscher Chemiker.
- Dates
- 8 Sep 1975.
- Place
- Koeln, F.R. Germany.
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 7232690
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ACCURACY; ADDITIVES; BETA DETECTION; DECONTAMINATION; ERRORS; FISSION PRODUCTS; GRAPHITE; LABORATORY EQUIPMENT; LIQUID SCINTILLATORS; MODERATORS; PYROLYSIS; QUANTITATIVE CHEMICAL ANALYSIS; TRITIUM
- Descriptors DEC
- BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CARBON; CHARGED PARTICLE DETECTION; CHEMICAL ANALYSIS; CHEMICAL REACTIONS; CLEANING; DECOMPOSITION; ELEMENTS; HYDROGEN ISOTOPES; ISOTOPES; LIGHT NUCLEI; NONMETALS; NUCLEI; ODD-EVEN NUCLEI; PHOSPHORS; RADIATION DETECTION; RADIOACTIVE MATERIALS; RADIOISOTOPES; YEARS LIVING RADIOISOTOPES
Optional Information
- Notes
- 4 figs.; 4 refs.