File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

김희령

Kim, Hee Reyoung
RAdiation and MagnetohydroDynamics Advanced Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

In situ beta radiation monitoring system with enhanced efficiency for water samples from decommissioned nuclear environment

Author(s)
Lee, UkhaeChoi, Woo NyunKim, Min JiKim, Hee Reyoung
Issued Date
2019-02
DOI
10.1063/1.5078643
URI
https://scholarworks.unist.ac.kr/handle/201301/26394
Fulltext
https://aip.scitation.org/doi/10.1063/1.5078643
Citation
REVIEW OF SCIENTIFIC INSTRUMENTS, v.90, no.2, pp.025103
Abstract
A nuclear environment, including decommissioning activity contains various radioactive nuclides such as pure beta emitters. These radionuclides should be monitored to ensure radiological safety. In particular, beta radionuclides, such as 3H and 14C, can cause internal exposures and should be managed more strictly in terms of health physics. For beta radionuclides, the measurement is carried out in a laboratory through sampling rather than on-site because of the short range. This method is time consuming, laborious, and costly and can also generate secondary waste. In this study, a system for the in situ monitoring of beta radionuclides in water samples is proposed for nuclear facilities and decommissioned environments. A plastic scintillator with low sensitivity to gamma rays and good reactivity with beta radionuclides was used. The detection efficiency was increased by using a detection part, whereby the water sample is made to directly contact the scintillator by utilizing the characteristic of plastic scintillators (i.e., they do not react with water). A coincidence circuit was constructed by using multiple photomultiplier tubes (PMTs) and applied to gross beta activity measurements. The values obtained from a single PMT were used in the spectral analysis to determine the effect of each beta radionuclide. Beta radionuclides in water samples in the field can be monitored by using plastic scintillators and multiple PMTs.
Publisher
American Institute of Physics Inc.
ISSN
0034-6748
Keyword
DOSIMETRYDETECTORISOTOPESEXPOSUREDISPOSALPLANT

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.