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Determination of Tritium in Hydrosphere Samples by Ultra Low Level Liquid Scintillation Quantulus 1220 Barbora Sedlářová. Water Research Institute T. G. Masaryka, Podbabská 30, 160 62 Prague 6, e- mail: barbora_sedlarova@vuv.cz. Intoduction. Quantulus 1220

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Determination of Tritium in Hydrosphere Samples by Ultra Low Level Liquid Scintillation Quantulus 1220Barbora Sedlářová

Water Research Institute

T. G. Masaryka, Podbabská 30, 160 62 Prague 6,

e-mail: barbora_sedlarova@vuv.cz

intoduction
Intoduction
  • Quantulus 1220
  • Project requisted by the Ministry of Environment: The Contamination of Hydrosphere by radionuclides
  • Determination of tritium in surface water: Labe Hřensko, Odra Bohumín,Dyje Pohansko
  • Determination of tritium in rain-fall: Závišín
method of 3 h determination
Method of 3H determination
  • SOP-RA-7: ČSN ISO 9698
  • 20 ml PE vial: 8 ml water sample + 12 ml Optiphase HiSafe – 3
  • Counting efficiency: ~ 22%
  • Calibration: standard of tritium, CMI IIZ
  • Counting time: t = 800 min
  • Background: ~ 0,6 CPM
  • Detection limit: level of significancy

a = b = 0,05 (P = 95%), cND 1,2 Bq/l, cNV 0,6 Bq/l

  • Control of quality: verification of instrument byCMI IIZ, interlaboratorycomparison test, laboratory quality system is assessed by ASLAB
areas of tritium detection
Areas of tritium detection

Labe Hřensko

Odra Bohumín

Závišín

Dyje Pohansko

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Deposition of tritium in river-basin Labe and outfall of tritium in Labe – Hřensko

during 1993 – 2002 include highlight increase of ETE

(nuclear power station Temelín) inpact in 2002

Rain-fall

ETE

Labe

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Thank you for your attention

Water Research Institut T. G. Masaryka, Podbabská 30, 160 62 Prague 6,

e-mail: barbora_sedlarova@vuv.cz