Comparative Analysis of Direct and Indirect <sup>131</sup>I Measurement Methods from the Stack to Outdoor
<span style="font-size: 9.0pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'MS Mincho'; mso-ansi-language: EN-US; mso-fareast-language: AR-SA; mso-bidi-language: AR-SA;">The radioisotope production facility at PUSPIPTEK Serpong produ...
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| Format: | Article |
| Language: | English |
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Center for Development of Nuclear Informatics, National Nuclear Energy Agency (BATAN)
2017-11-01
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| Series: | Atom Indonesia |
| Subjects: | |
| Online Access: | http://aij.batan.go.id/index.php/aij/article/view/756 |
| Summary: | <span style="font-size: 9.0pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'MS Mincho'; mso-ansi-language: EN-US; mso-fareast-language: AR-SA; mso-bidi-language: AR-SA;">The radioisotope production facility at PUSPIPTEK Serpong produces and processes <sup>131</sup>I that can disperse to the settlements (community) and the environment around the Serpong Nuclear Area (SNA). <sup>131</sup>I is produced routinely for medical uses in hospitals and pharmacies, for both domestic uses and export. <sup>131</sup>I is a beta and gamma emitting radioactive material and can cause thyroid cancer. The problem was that there was so far no research and in-depth assessment of the aerial dispersion of <sup>131</sup>I radioactivity emitted from the radioisotope production stack to the environment at actual conditions. The research was conducted through simultaneous measurement of <sup>131</sup>I radioactivity in the stack of the <sup>131</sup>I radioisotope production facility, Serpong, and outdoor in house courtyards around SNA in normal condition (no accident) based on the variations of the distance and wind direction. Direct measurements were carried out with a portable in-situ NaI(Tl) detector at outdoor, and with a LaBr<sub>3</sub> detector in the stack. Indirect measurements were carried out by using charcoal filter and vacuum pump in the stack and outdoor. </span><span style="font-size: 9.0pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'MS Mincho'; mso-ansi-language: EN; mso-fareast-language: AR-SA; mso-bidi-language: AR-SA;" lang="EN">The direct measurement method has many advantages over the indirect measurement. The direct measurement method was found to be more accurate, less expensive, easier to operate, needing just one operator </span><span style="font-size: 9.0pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'MS Mincho'; mso-ansi-language: EN-US; mso-fareast-language: AR-SA; mso-bidi-language: AR-SA;">in </span><span style="font-size: 9.0pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'MS Mincho'; mso-ansi-language: EN; mso-fareast-language: AR-SA; mso-bidi-language: AR-SA;" lang="EN">its implementation</span><span style="font-size: 9.0pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'MS Mincho'; mso-ansi-language: EN-US; mso-fareast-language: AR-SA; mso-bidi-language: AR-SA;">,</span><span style="font-size: 9.0pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'MS Mincho'; mso-ansi-language: EN; mso-fareast-language: AR-SA; mso-bidi-language: AR-SA;" lang="EN"> portable, and can be operated continuously and for long durations.</span><span style="font-size: 9.0pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'MS Mincho'; mso-ansi-language: EN-US; mso-fareast-language: AR-SA; mso-bidi-language: AR-SA;"> The overall activity concentrations of <sup>131</sup>I on average obtained by </span><span style="font-size: 9.0pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN; mso-fareast-language: IN; mso-bidi-language: AR-SA;" lang="EN">either direct or indirect method</span><span style="font-size: 9.0pt; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'MS Mincho'; mso-ansi-language: EN-US; mso-fareast-language: AR-SA; mso-bidi-language: AR-SA;"> were still below the upper limit of <sup>131</sup>I activity concentration in the air (530 Bq/m<sup>3</sup>) stipulated by the Regulation of the Chairman of BAPETEN (Perka BAPETEN) No. 7/2013. </span> |
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| ISSN: | 0126-1568 2356-5322 |