Poppy Intan Tjahaja
Nuklir Bahan dan Radiometri, BATAN

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Respon Berbagai Bentuk, Ukuran dan Bahan Elektroda Pada Pengayaan Elektrolisis Tritium dalam Sampel Air Hidayanto, Eko; Tjahaja, Poppy Intan; Arif, Idam
BERKALA FISIKA Vol 12, No 3 (2009): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (190.762 KB)

Abstract

Experiments were carried out to investigate the effects of various forms, sizes and materials of electrodes in the electrolytic enrichment for the determination of tritium concentration in water sample. Electrodes were made in several forms: square plate, cylinder and spiral. The electrolytic enrichment was carried out by conducting electric current to the electrodes in electrolytic cell at 150C filled with water sample, until the water volume is reduced to 10% from the initial volume. The concentrated water were then mixed with scintillate solution, and then counted using Liquid Scintillation Counter (LSC). The results show that the appropriate electrodes is nickel square plate with the recovery fraction and the enrichment factor respectively are 73.73% and 7.373
INTERNAL DOSE DETERMINATION ON HUMAN AS RESULT OF PROCESSED KANGKUNG (IPOMOEA REPTANS) CONSUMPTION CONTAMINATED BY RADIONUCLIDE CESIUM-134 AND STRONTIUM-85 Putra, Didi Prabowo; S. Salami, Indah Rachmatiah; Tjahaja, Poppy Intan
Jurnal Teknik Lingkungan Vol 15, No 2 (2009)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (321.643 KB) | DOI: 10.5614/jtl.2009.15.2.1

Abstract

Abstract: Research has been done to find out internaL dose that can be received by human as result of consumption kangkung that growth in contaminated soil by caesium-134 and strotium-85. Kangkung was planted in soil contaminated with caesium-134 and strontium-85 for 70 days. After harvesting, a part of the plant separated and the other part being washed and boiled and then the radionuclide content for all of the plant were measured using spectrometer gamma. From the measurement and calculation, washing, boiling and sauteing process gives quite significant impact in reducing activity percentage of radionuclide which were about 23,5, 14,4 and 9,8 for strontium- 85 and 28,2, 58,5 and 47,4 for caesium-134. The result of equivalent dose calculation showed that each internal dosesis still bellow the limit of 5 mSv/year, and the dose was 0,053 mSv/year until 0,137 mSv/year.  Key words: kangkung, contamination, cesium-134, strontium-85, activity, internal dose Abstrak: Penelitian dilakukan untuk mengetahui dosis interna yang dapat diterima oleh manusia akibat mengkonsumsi kangkung yang tumbuh pada tanah terkontaminasi oleh radionuklida cesium-134 dan stronsium-85.Penelitian dilakukan dengan cara menanam tanaman kangkung pada media tanah terkontaminasi Cs-134 dan Sr-85selama 70 hari. Setelah panen, sampel tanaman diproses dengan pencucian, perebusan dan penumisan kemudiadiukur kandungan radionuklidanya dengan menggunakan spektrometer gamma. Dari hasil pengukuran diperolehbahwa ketiga proses memberikan pengaruh yang cukup besar terhadap penyisihan radioaktivitas dari sampeltanaman, yaitu sebesar 23,5, 14,4 dan 9,8 untuk stronsium-85 dan 28,2, 58,5 dan 47,4 untuk cesium-134. Hasilperhitungan dosis ekivalen menunjukkan nilai dosis interna dari masing-masing radionuklida berada dibawahambang batas sebesar 5 mSv/tahun, yaitu bernilai antara 0,053 mSv/tahun sampai 0,137 mSv/tahun.