Studying temporal variations of indoor radon as a vital step towards rational and harmonized international regulation

AbstractIndoor radon exposure is a serious hazard to human health. The radon concentration in surface air varies spatially as a result of the uranium content in the underlying rocks. However, there exist also considerable knowledge gaps about temporal variations. Here we document the high temporal variability of radon flux from exhalation in high-resolution (hourly) time series from a site near Kleinneudorf, Schleswig-Holstein, Germany. By means of advanced techniques of statistical time series analysis, we show a close association between radon and meteorological variables (air temperature and air pressure). We identify four principal weather regimes that lead to different radon exhalation modes. For each of the modes, we construct a statistical linear model for radon prediction via the meteorological variables and their derivatives or time-lagged versions. The model explains between 53 and 86 percent of the variance. Many model deviations consist in excessively high measured radon values and hint at nonlinear effects. Other model deviations hint at non-meteorological forcing.

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Temporal Variations of Radon Levels in Dwellings

Radiation Protection Dosimetry ◽

10.1093/oxfordjournals.rpd.a082480 ◽

1994 ◽

Vol 56 (1-4) ◽

pp. 323-325 ◽

Cited By ~ 5

Author(s):

P.R. Lomas ◽

B.M.R. Green

Keyword(s):

Structural Changes ◽

Indoor Radon ◽

Uranium Content ◽

Temporal Variations ◽

Geological Factors ◽

The Stability ◽

Over Time

Abstract Several factors determine the concentration of radon in a dwelling: the uranium content and permeability of the building ground; the construction and integrity of the floor; the habits and preferences of the occupants. Whereas the geological factors are unlikely to alter over time, it is quite possible for structural changes to occur, such as settlement cracking, which increases radon ingress, and for the occupants to change their living habits, such as increasing ventilation, which may reduce radon levels. New occupants may arrive with entirely different lifestyles. Questions arise about the variability of indoor radon levels as time progresses and as occupants change. The database of radon results for UK homes, which extends backwards for about a decade, is examined for repeat measurements, and the data are analysed so as to assess the stability or otherwise of the levels under changing circumstances.

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STATISTICAL ANALYSIS OF TEMPORAL VARIATIONS IN INDOOR RADON DATA USING AN ADAPTED RESPONSE SURFACE METHOD

Journal of Natural Sciences Engineering and Technology ◽

10.51406/jnset.v14i1.1476 ◽

2016 ◽

Vol 14 (1) ◽

pp. 1-14

Author(s):

G. A. DAWODU ◽

O. O. ALATISE ◽

A. O. MUSTAPHA

Keyword(s):

Relative Humidity ◽

Response Surface ◽

Response Surface Method ◽

Indoor Air ◽

Indoor Radon ◽

Multiple Linear Regression Model ◽

Barometric Pressure ◽

Temporal Variations ◽

Normality Test ◽

Surface Method

Temporary variations in indoor radon data (IRD), comprising radon concentration (RC), air temperature, relative humidity and barometric pressure were monitored hourly over a period of two months in a bungalow house in Abeokuta, Nigeria. A total of 1510 data was assembled and analyzed statistically using Shapiro-Wilk for normality test, response surface method (RSM) and adapted response surface method (ARSM) to investigate and model the influence of the meteorological parameters on the variations of RC in indoor air. The overall results showed that RC varies widely over time and correlates positively with relative humidity and temperature, but negatively with barometric pressure. Specific results of the two response surface methods were compared and contrasted and the multiple linear regression model of the ARSM was highlighted and established as the appropriate method for analyzing IRD. ARSM was presented in an easily reusable form that can easily be adopted by researchers and data analysts.ª¤?

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Spatial and temporal variations in indoor radon concentrations in Pennsylvania, USA from 1988 to 2018

Journal of Environmental Radioactivity ◽

10.1016/j.jenvrad.2021.106594 ◽

2021 ◽

Vol 233 ◽

pp. 106594

Author(s):

Kyle R. Kellenbenz ◽

Kabindra M. Shakya

Keyword(s):

Indoor Radon ◽

Temporal Variations ◽

Spatial And Temporal Variations ◽

Radon Concentrations

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Study of indoor radon levels in some areas of Himachal Pradesh: a comparison of different techniques

Radiation Measurements ◽

10.1016/s1350-4487(03)00253-1 ◽

2003 ◽

Author(s):

B Bajwa

Keyword(s):

Indoor Radon ◽

Himachal Pradesh

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PERAN DESIGNATED PERSON ASHORE (DPA) DALAM PENGOPERASIAN KAPAL YANG AMAN SESUAI KETENTUAN NASIONAL DAN INTERNASIONAL

JURNAL SAINS DAN TEKNOLOGI MARITIM ◽

10.33556/jstm.v20i1.212 ◽

2019 ◽

Vol 20 (1) ◽

Author(s):

Suganjar Suganjar ◽

Renny Hermawati

Keyword(s):

Marine Environment ◽

Emergency Preparedness ◽

Safety Management ◽

Shipping Industry ◽

Safe Operation ◽

International Regulation ◽

Loss Of Life ◽

Shipping Company ◽

Environmental Protection Policy ◽

Human Injury

Safety management in the shipping industry is based on an international regulation. It is International Safety Management Code (ISM-Code) which is a translation of SOLAS ‘74 Chapter IX. It stated that the objectives of the Code are to ensure safety at sea, prevention of human injury or loss of life, and avoidance of damage to the environment, in particular, to the marine environment, and to property.it is also requires commitment from top management to implementation on both company and on board. The implementation of the ISM-Code is expected to make the ship’s safety is more secure. The ISM-Code fulfillment refers to 16 elements, there are; General; Safety and Environmental Protection Policy; Company Responsibility and Authority; Designated Person(s); Master Responsibility and Authority; Resources and Personnel; Shipboard Operation; Emergency Preparedness; Report and Analysis of Non-conformities, Accidents and Hazardous Occurrences; Maintenance of the Ship and Equipment; Documentation; Company Verification, Review, and Evaluation; Certification and Periodical Verification; Interim Certification; Verification; Forms of Certificate. The responsibility and authority of Designated Person Ashore / DPA in a shipping company is regulated in the ISM-Code. So, it is expected that DPA can carry out its role well, than can minimize the level of accidents in each vessels owned/operated by each shipping company.Keywords : ISM Code, Safety management, Designated Person Ashore Manajemen keselamatan di bidang pelayaran saat ini diimplementasikan dalam suatu peraturan internasional yaitu International Safety Management Code (ISM-Code) yang merupakan penjabaran dari SOLAS 74 Chapter IX-Management for the safe operation of ships. Tujuan dari ISM-Code “The objectives of the Code are to ensure safety at sea, prevention of human injury or loss of life, and avoidance of damage to the environment, in particular, to the marine environment, and to property” dan ISM-Code menghendaki adanya komitmen dari manajemen tingkat puncak sampai pelaksanaan, baik di darat maupun di kapal. Pemberlakuan ISM-Code tersebut diharapkan akan membuat keselamatan kapal menjadi lebih terjamin. Pemenuhan ISM-Code mengacu kepada 16 elemen yang terdiri dari ; umum; kebijakan keselamatan dan perlindungan lingkungan; tanggung jawab dan wewenang perusahaan; petugas yang ditunjuk didarat; tanggung jawab dan wewenang nahkoda; sumber daya dan personil; pengopersian kapal; kesiapan menghadapi keadaan darurat; pelaporan dan analisis ketidaksesuaian, kecelakaan dan kejadian berbahaya; pemeliharaan kapal dan perlengkapan; Dokumentasi; verifikasi, tinjauan ulang, dan evaluasi oleh perusahaan; sertifikasi dan verifikasi berkala; sertifikasi sementara; verifikasi; bentuk sertifikat. Tugas dan tanggungjawab Designated Person Ashore/DPA didalam suatu perusahaan pelayaran, telah diatur di dalam ISM-Code. Sehingga diharapkan agar DPA dapat melaksanakan peranannya dengan baik, sehingga dapat menekan tingkat kecelakaan di setiap armada kapal yang dimiliki oleh setiap perusahaan pelayaran.Kata kunci : ISM Code, Manajemen keselamatan, Designated Person Ashore

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