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Radon concentration variations at the Yangyang underground laboratory

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Title
Radon concentration variations at the Yangyang underground laboratory
Author(s)
Ha, C.; Jeong, Y.; Woon Gu Kang; Kim, J.; Kyungwon Kim; Kim, S.K.; Yeongduk Kim; Hyun Su Lee; Moo Hyun Lee; Lee, M.J.; Lee, Y.J.; Seo, K.M.
Publication Date
2022-11
Journal
Frontiers in Physics, v.10
Publisher
Frontiers Media S.A.
Abstract
Copyright © 2022 Ha, Jeong, Kang, Kim, Kim, Kim, Kim, Lee, Lee, Lee, Lee and Seo.The concentration of 222Rn in the air has been measured in the 700 m-deep Yangyang underground laboratory between October 2004 and May 2022. The average concentrations (spreads) in two experimental areas, called A6 and A5, were measured to be 53.4 Bq/m3 (13.9 Bq/m3) and 33.5 Bq/m3 (7.9 Bq/m3), respectively. The lower value in the A5 area reflects the presence of better ventilation. The radon concentrations sampled within the two A5 experimental rooms’ air are found to be correlated to the local tunnel temperature outside of the rooms, with correlation coefficients r = 0.22 and r = 0.70. Therefore, the radon concentrations display a seasonal variation, because the local temperature driven by the overground season influences air ventilation in the experimental areas. A sinusoidal function with a period of 1 year was used to fit the radon concentration data of both underground areas finding a maximum amplitude on August, 31 ± 6 days.
URI
https://pr.ibs.re.kr/handle/8788114/12557
DOI
10.3389/fphy.2022.1030024
ISSN
2296-424X
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > 1. Journal Papers (저널논문)
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