A device for uranium series leaching from glass fiber in HEPA filter in: Journal of Radioanalytical and Nuclear Chemistry Volume 293 Issue 1 (2012)

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 293: Issue 1

A device for uranium series leaching from glass fiber in HEPA filter

Authors:

Gye-Nam Kim

Gye-Nam Kim Korea Atomic Energy Research Institute, 1045 Daedeokdaero, Yuseong-gu, Daejeon, 305-353 Republic of Korea

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Hye-Min Park

Hye-Min Park Korea Atomic Energy Research Institute, 1045 Daedeokdaero, Yuseong-gu, Daejeon, 305-353 Republic of Korea

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Wang-Kyu Choi

Wang-Kyu Choi Korea Atomic Energy Research Institute, 1045 Daedeokdaero, Yuseong-gu, Daejeon, 305-353 Republic of Korea

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, and

Jei-Kwon Moon

Jei-Kwon Moon Korea Atomic Energy Research Institute, 1045 Daedeokdaero, Yuseong-gu, Daejeon, 305-353 Republic of Korea

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Pages:: 157–166

Online Publication Date:: 25 Jan 2012

Publication Date:: 01 Jul 2012

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-012-1628-y

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Abstract

For the disposal of a high efficiency particulate air (HEPA) glass filter into the environment, the glass fiber should be leached to lower its radioactive concentration to the clearance level. To derive an optimum method for the removal of uranium series from a HEPA glass fiber, five methods were applied in this study. That is, chemical leaching by a 4.0 M HNO₃–0.1 M Ce(IV) solution, chemical leaching by a 5 wt% NaOH solution, chemical leaching by a 0.5 M H₂O₂–1.0 M Na₂CO₃ solution, chemical consecutive chemical leaching by a 4.0 M HNO₃ solution, and repeated chemical leaching by a 4.0 M HNO₃ solution were used to remove the uranium series. The residual radioactivity concentrations of ²³⁸U, ²³⁵U, ²²⁶Ra, and ²³⁴Th in glass after leaching for 5 h by the 4.0 M HNO₃–0.1 M Ce(IV) solution were 2.1, 0.3, 1.1, and 1.2 Bq/g. The residual radioactivity concentrations of ²³⁸U, ²³⁵U, ²²⁶Ra, and ²³⁴Th in glass after leaching for 36 h by 4.0 M HNO₃–0.1 M Ce(IV) solution were 76.9, 3.4, 63.7, and 71.9 Bq/g. The residual radioactivity concentrations of ²³⁸U, ²³⁵U, ²²⁶Ra, and ²³⁴Th in glass after leaching for 8 h by a 0.5 M H₂O₂–1.0 M Na₂CO₃ solution were 8.9, 0.0, 1.91, and 6.4 Bq/g. The residual radioactivity concentrations of ²³⁸U, ²³⁵U, ²²⁶Ra, and ²³⁴Th in glass after consecutive leaching for 8 h by the 4.0 M HNO₃ solution were 2.08, 0.12, 1.55, and 2.0 Bq/g. The residual radioactivity concentrations of ²³⁸U, ²³⁵U, ²²⁶Ra, and ²³⁴Th in glass after three repetitions of leaching for 3 h by the 4.0 M HNO₃ solution were 0.02, 0.02, 0.29, and 0.26 Bq/g. Meanwhile, the removal efficiencies of ²³⁸U, ²³⁵U, ²²⁶Ra, and ²³⁴Th from the waste solution after its precipitation–filtration treatment with NaOH and alum for reuse of the 4.0 M HNO₃ waste solution were 100, 100, 93.3, and 100%.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

To see the editorial board, please visit the website of Springer Nature.

Manuscript Submission: HERE

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)