Evaluation of the Radon Contribution Rate in Apartments through Evaluation of the Radon Exhalation Rate from Building Materials

Hong, Hyong Jin; Choi, Jiwon; Yoon, Sung-Won; Kim, Heechun; Lee, Cheol Min

doi:10.5668/jehs.2021.47.5.425

Cited by 2 publications

(1 citation statement)

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“…However, because exhalation may be low owing to individual effects of building materials such as the degree of sealing and airtightness, as well as structural differences, it is necessary to verify radon concentration by direct investigations in actual indoor spaces [16]. Concentrated evaluations of specific building materials are necessary for radon exhalation from building materials; however, there have been instances in which radon exhalation rates 5 to 9 times higher were investigated depending on the structure of the apartment housings and the influence of the building materials, and building materials directly exposed to the interior have been identified as factors that can determine indoor radon concentrations [17]. In houses with successful air exchange, radon exhalation from building materials do not significantly affect the indoor air quality [18].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Indoor Radon Reduction Effects Based on Apartment Housing Ventilation Methods

et al. 2022

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A lack of ventilation in multi-unit dwellings can affect human health adversely owing to accumulated radon gases; therefore, developing immediate and effective methods to reduce radon gas in indoor living environments is urgently needed. Therefore, this study conducted a basic research study to develop ventilation guidelines for radon through assessments of various ventilation strategies on indoor radon concentration in multiple-unit dwellings, a typical residential type in Korea. Radon measurement was conducted in November 2020 using RAD 7 Radon Detector (Durridge Co., Billerica, MA, USA) for living rooms and rooms of an apartment located in Uijeongbu, Gyeonggi-do, Korea. The radon reduction effect according to the ventilation conditions per hour was compared and evaluated by performing seven natural ventilation scenarios through opening and closing windows leading to the outside and three types of mechanical ventilation with high, middle, and low operating intensity. The concentration ratio (Cr) was estimated to present the indoor radon increase/decrease ratio. Among the natural ventilation scenarios, Case 3 had the highest radon reduction rate in the living room and Case 1 in the room, and Case 2 using natural ventilation equipment showed the lowest reduction rate in both the room and the living room. When ventilated by mechanical ventilation conditions, the radon reduction rate (Pr) was 70% or less under all conditions. Under the natural ventilation measurement condition, when every doors and windows was opened, it showed an effective ventilation in a short time. With high mechanical ventilation, the radon reduction effect in a relatively large space was better. Additionally, with middle and low mechanical ventilation, the reduction effect seems to be good in a relatively narrow space.

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Section: Introductionmentioning

confidence: 99%