The assessment of indoor Radon-222 concentration and emanation rate at Gua Penyu, Pahang; [Penilaian kepekatan dan kadar pancaran dalaman Radon-222 di Gua Penyu, Pahang]

The indoor Radon-222 concentration and emanation rate in Gua Penyu, Gua Gelanggi Complex, Pahang were measured using Solid State Nuclear Track Detector CR-39 (SSNTD CR-39) to evaluate the air quality and radiological exposure in this recreational cave. A total of 20 SSNTD CR-39 dosimeters were place...

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Published in:Malaysian Journal of Analytical Sciences
Main Author: Sani J.M.; Alias N.; Ahmad N.; Saat A.
Format: Article
Language:English
Published: Malaysian Society of Analytical Sciences 2018
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050106606&doi=10.17576%2fmjas-2018-2203-16&partnerID=40&md5=bbd40648ee153279e20bcea720b5aaac
id 2-s2.0-85050106606
spelling 2-s2.0-85050106606
Sani J.M.; Alias N.; Ahmad N.; Saat A.
The assessment of indoor Radon-222 concentration and emanation rate at Gua Penyu, Pahang; [Penilaian kepekatan dan kadar pancaran dalaman Radon-222 di Gua Penyu, Pahang]
2018
Malaysian Journal of Analytical Sciences
22
3
10.17576/mjas-2018-2203-16
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050106606&doi=10.17576%2fmjas-2018-2203-16&partnerID=40&md5=bbd40648ee153279e20bcea720b5aaac
The indoor Radon-222 concentration and emanation rate in Gua Penyu, Gua Gelanggi Complex, Pahang were measured using Solid State Nuclear Track Detector CR-39 (SSNTD CR-39) to evaluate the air quality and radiological exposure in this recreational cave. A total of 20 SSNTD CR-39 dosimeters were placed inside the cave at about 15 m apart each. 10 dosimeters were embedded 5 cm into cave floor to determine emanation rate, while the other 10 dosimeters were placed at one meter above the floor level for concentration measurement. The control samples were placed outside the cave 15 m from the main entrance. These SSNTD CR-39 samples were left for a month before undergone etching process with NaOH solution (6 M) at 70 °C for six hours. The radon concentration and emanation rate were both determined from the track density in each CR-39 (1cm ☓ 1cm) sampling. The results showed that the radon emanation rates varied between 0.030 ±0.004 Bqm-2day-1 and 0.120 ± 0.017 Bqm-2day-1 with the average rate of 0.080 Bqm-2day-1. The radon concentration was between 3.72 ± 1.60 Bqm-3 and 7.89 ± 2.10 Bqm-3 with the average of 4.8 Bqm-3. These values were lower compared to indoor concentration allowed by the International Commission on Radiation Protection (ICRP) 2009 that is 200 – 300 Bqm-3. The annual effective dose were found to range between 0.09 mSv.y-1 and 0.20 mSv.y-1 which was lower than recommended value 3 to 10 mSv.y-1 put forth by the ICRP 1993. Hence, this recreational cave is safe to be visited by public. © 2018, Malaysian Society of Analytical Sciences. All rights reserved.
Malaysian Society of Analytical Sciences
13942506
English
Article
All Open Access; Gold Open Access
author Sani J.M.; Alias N.; Ahmad N.; Saat A.
spellingShingle Sani J.M.; Alias N.; Ahmad N.; Saat A.
The assessment of indoor Radon-222 concentration and emanation rate at Gua Penyu, Pahang; [Penilaian kepekatan dan kadar pancaran dalaman Radon-222 di Gua Penyu, Pahang]
author_facet Sani J.M.; Alias N.; Ahmad N.; Saat A.
author_sort Sani J.M.; Alias N.; Ahmad N.; Saat A.
title The assessment of indoor Radon-222 concentration and emanation rate at Gua Penyu, Pahang; [Penilaian kepekatan dan kadar pancaran dalaman Radon-222 di Gua Penyu, Pahang]
title_short The assessment of indoor Radon-222 concentration and emanation rate at Gua Penyu, Pahang; [Penilaian kepekatan dan kadar pancaran dalaman Radon-222 di Gua Penyu, Pahang]
title_full The assessment of indoor Radon-222 concentration and emanation rate at Gua Penyu, Pahang; [Penilaian kepekatan dan kadar pancaran dalaman Radon-222 di Gua Penyu, Pahang]
title_fullStr The assessment of indoor Radon-222 concentration and emanation rate at Gua Penyu, Pahang; [Penilaian kepekatan dan kadar pancaran dalaman Radon-222 di Gua Penyu, Pahang]
title_full_unstemmed The assessment of indoor Radon-222 concentration and emanation rate at Gua Penyu, Pahang; [Penilaian kepekatan dan kadar pancaran dalaman Radon-222 di Gua Penyu, Pahang]
title_sort The assessment of indoor Radon-222 concentration and emanation rate at Gua Penyu, Pahang; [Penilaian kepekatan dan kadar pancaran dalaman Radon-222 di Gua Penyu, Pahang]
publishDate 2018
container_title Malaysian Journal of Analytical Sciences
container_volume 22
container_issue 3
doi_str_mv 10.17576/mjas-2018-2203-16
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050106606&doi=10.17576%2fmjas-2018-2203-16&partnerID=40&md5=bbd40648ee153279e20bcea720b5aaac
description The indoor Radon-222 concentration and emanation rate in Gua Penyu, Gua Gelanggi Complex, Pahang were measured using Solid State Nuclear Track Detector CR-39 (SSNTD CR-39) to evaluate the air quality and radiological exposure in this recreational cave. A total of 20 SSNTD CR-39 dosimeters were placed inside the cave at about 15 m apart each. 10 dosimeters were embedded 5 cm into cave floor to determine emanation rate, while the other 10 dosimeters were placed at one meter above the floor level for concentration measurement. The control samples were placed outside the cave 15 m from the main entrance. These SSNTD CR-39 samples were left for a month before undergone etching process with NaOH solution (6 M) at 70 °C for six hours. The radon concentration and emanation rate were both determined from the track density in each CR-39 (1cm ☓ 1cm) sampling. The results showed that the radon emanation rates varied between 0.030 ±0.004 Bqm-2day-1 and 0.120 ± 0.017 Bqm-2day-1 with the average rate of 0.080 Bqm-2day-1. The radon concentration was between 3.72 ± 1.60 Bqm-3 and 7.89 ± 2.10 Bqm-3 with the average of 4.8 Bqm-3. These values were lower compared to indoor concentration allowed by the International Commission on Radiation Protection (ICRP) 2009 that is 200 – 300 Bqm-3. The annual effective dose were found to range between 0.09 mSv.y-1 and 0.20 mSv.y-1 which was lower than recommended value 3 to 10 mSv.y-1 put forth by the ICRP 1993. Hence, this recreational cave is safe to be visited by public. © 2018, Malaysian Society of Analytical Sciences. All rights reserved.
publisher Malaysian Society of Analytical Sciences
issn 13942506
language English
format Article
accesstype All Open Access; Gold Open Access
record_format scopus
collection Scopus
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