Radon Diffusion Coefficients in 360 Waterproof Materials of Different Chemical Composition

Jiranek, M.; Kotrbata, M.

doi:10.1093/rpd/ncr482

Cited by 4 publications

(6 citation statements)

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“…The red dashed lines in Figure 5 indicate the minimum and maximum values for the diffusion constant for polypropylene as reported in Reference [2]. The dashed blue line shows the upper limit on the diffusion constant of transparent Mylar, as published in [1].…”

Section: Bag Materialsmentioning

confidence: 83%

“…The results of this first series of measurements, in which the monitor can had not yet been implemented, are reported as a ratio R of the activity determined for the can sealed inside the bag material under study, divided by the activity of a can exposed in parallel but contained in a polypropylene bag. Polypropylene was chosen to serve as the reference material as it is known to be quite permeable to radon [2]. The R-values obtained this way are shown in Table 1 together with other relevant parameters.…”

Section: Principlementioning

confidence: 99%

“…Many studies of films as radon barriers have been carried out; see, for example, [1][2][3][4] and citations therein. What is unique to this method is that it employs gamma spectroscopy and evaluates not only the film but also sealed bags fabricated from these films.…”

Section: Introductionmentioning

confidence: 99%

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A new method for evaluating the effectiveness of plastic packaging against radon penetration

Meng

Busenitz

Piepke

2020

Applied Radiation and Isotopes

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Deposition of 222 Rn daughters onto detector materials pose a risk to ultra-low background experiments. To mitigate this risk, a common approach is to enclose detector components in sealed plastic bags made of films known to be effective barriers against radon. We describe a new method to evaluate radon barriers which is unique in that (a) it gauges not only the intrinsic resistance to radon penetration of a plastic film but also the integrity of bags fabricated from the film and sealed following some protocol, and (b) it employs gamma spectroscopy rather than alpha spectroscopy. We report the results of applying this method to sealed bags fabricated from polypropylene, Nylon, Mylar, metallized Mylar, FEP, and PFA. Evaluation of the fluoropolymers FEP and PFA as radon barriers are the first such measurements.

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Section: Bag Materialsmentioning

confidence: 83%

Section: Principlementioning

confidence: 99%

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A new method for evaluating the effectiveness of plastic packaging against radon penetration

Meng

Busenitz

Piepke

2020

Applied Radiation and Isotopes

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“…However, they fall short in addressing the requirements of real-world application due to their single-function nature. 9 In the recent years, polymer composites have gained prominence in various fields. 10 The thermal behavior, gas impermeation properties and radiation shielding capability of polymer composite can be improved via incorporation of functional fillers.…”

Section: Introductionmentioning

confidence: 99%

Effect of modified graphene nanosheets on the properties of ²²²Rn and gamma ray multifunctional shielding polymer composite materials

Tan,

Wang,

Liu

et al. 2024

Polymer Composites

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Development of shielding materials for 222Rn and γ radiation has crucial implications for ensuring the safety of individuals. This paper reports the synthesis of modified graphene nanosheets (MGNPs) via the reaction of KH560 with graphene nanosheets (GNPs), while melt blending and hot‐press molding technique were used to fabricate a multifunctional polymer composite shielding material, MGNP/WB/PMMA (polymethyl methacrylate). Successful synthesis of MGNP was confirmed by Fourier transform infrared spectroscopy, and scanning electron microscope (SEM) analysis was utilized to assess the distribution of functional fillers within the cross‐section of the polymer composite. Additionally, thermogravimetric analysis (TGA) demonstrated that MGNP and WB particles enhance the thermal stability of the polymer composite materials. Compared to pure PMMA, 98.7% decrease in the radon diffusion coefficient was observed for MGNP1.5 wt%/PMMA composite material. In addition to enhance the radon‐blocking characteristics of the polymer composites, inclusion of WB particles also boosts their shielding capacity against gamma radiation. The 222Rn diffusion coefficient of MGNP1.5 wt%/WB25wt%/PMMA polymer composite material decreased by 99.6% and at energies of 60 KeV, 80 KeV, 122 KeV, 365 KeV, the mass attenuation coefficient (MAC) for the composite material increased by 0.79, 1.97, 0.57, and 0.05 cm2/g, respectively, compared to pure PMMA.Highlights The PMMA composite materials doped with graphene nanosheets demonstrate outstanding resistance to 222Rn. Graphene nanosheets modified by KH560 exhibit favorable dispersion within PMMA. WB can further enhance the radon resistance of MGNP/WB/PMMA composite materials. The polymer composites exhibit excellent 222Rn and gamma ray shielding properties.

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“…Se ha demostrado que disponer de este parámetro es también una herramienta para la verificación de la hermeticidad y estanqueidad de las juntas (tuberías, suelos, etc.) (Jiránek et al, 2011).…”

Section: Selección Del Equipo Experimental Diseño Y Montaje Del Equip...unclassified

Estudio del comportamiento del gas radón (222Rn) en los procesos de transferencia en agua y en aire

Medina¹

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Me gustaría dar las gracias a mis directores de tesis, Gúmer, María y Belén, por darme la oportunidad de participar en un proyecto como este. A Gúmer, per seguir confiant en mi any rere any, per tot el que m'ha ensenyat en este període i per la seua dedicació i paciència. A María, por acompañarme desde que empecé en la UPV, por apostar por mi en los buenos momentos y en los no tan buenos, por las conversaciones infinitas que hemos tenido, profesionales y personales, y por estar siempre pendiente de mí. A Belén, por confiar y darme alas para investigar, por aconsejarme y ayudarme y tenerme siempre en cuenta, para todo. Gracias por hacer que los problemas siempre tengan solución. Sois el mejor ejemplo de sacrificio y trabajo duro, pero, sobre todo, de amabilidad y generosidad. Ojalá podamos seguir trabajando juntas muchos años.Al LRA, en especial a Pepa, per creure en el meu treball i per fer-me partícep sempre de cada projecte. Per tots els moments tan divertits que hem passat entre radó i radó. A Marina, por ser tan buena amiga, por lo que nos hemos desahogado juntas y por apoyarme siempre.A mis compañeros del departamento, por hacer los días más amenos y divertidos, en especial a Sete y Antonella, por ser compis y amigos, por reírnos juntos de todo y en cualquier momento. Me habéis ayudado mucho, siempre. A Vicent i Sandra, per ajudar-me en part de la tesi però també per donar-me una altra visió del món de la investigació.A Amandi, por tantísimos ratos de risas, de consejos, por las comilonas y por darme siempre el punto de vista crítico y más racional. Soy muy afortunada de tenerte.A Raquel y Guada, por enseñarme y cuidarme en el laboratorio cuando casi no sabía ni hacer diluciones. Gracias por motivarme para empezar con esta tesis y por hacerme sentir que puedo contar con vosotras.A la meua profe Gema, per fer que m'interessara tant per una enginyeria i alegrar-se de cada pas que he anat donant.Irene, qué suerte tuvimos de coincidir durante la colaboración docente. Gracias por cada llamada, por cada consejo y por entenderme a la perfección. Tenemos mucho tiempo que recuperar.Raquel, Sara, Alexa y Rocío, por cuidar la amistad, por hacer malabares con los horarios y seguir reservando tiempo para vernos y ponernos al día. Gracias por escucharme y estar siempre.A Sara, por arrastrarme durante tantos km, por mantener siempre la sonrisa y la alegria, y por cuidar tanto nuestra amistad. Te debo muchas horas, amiga.A Illa, per entendre'm, escoltar-me i cuidar-me, per totes les historietes que hem viscut juntes i per totes les que ens queden. I a Jorge, per dissenyar-me una portada tan bonica.A Marta i Irene, gràcies per la paciència infinita, sobre tot este últim any, i per ser els meus peus en terra. Gràcies per sentir-vos sempre tan orgulloses de mi i viure les meues alegries com si foren vostres.A Carme, per tota la vida, literal, que portem juntes. Eres amiga i eres germana. Gràcies per estar sempre i per entendre'm com ningú. Hem fet molts mòduls juntes.A la meua familia, la uela Tere, a les meues ties i tios, Xe...

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Radon Diffusion Coefficients in 360 Waterproof Materials of Different Chemical Composition

Cited by 4 publications

References 0 publications

A new method for evaluating the effectiveness of plastic packaging against radon penetration

A new method for evaluating the effectiveness of plastic packaging against radon penetration

Effect of modified graphene nanosheets on the properties of ²²²Rn and gamma ray multifunctional shielding polymer composite materials

Estudio del comportamiento del gas radón (222Rn) en los procesos de transferencia en agua y en aire

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Radon Diffusion Coefficients in 360 Waterproof Materials of Different Chemical Composition

Cited by 4 publications

References 0 publications

A new method for evaluating the effectiveness of plastic packaging against radon penetration

A new method for evaluating the effectiveness of plastic packaging against radon penetration

Effect of modified graphene nanosheets on the properties of 222Rn and gamma ray multifunctional shielding polymer composite materials

Estudio del comportamiento del gas radón (222Rn) en los procesos de transferencia en agua y en aire

Contact Info

Product

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About

Effect of modified graphene nanosheets on the properties of ²²²Rn and gamma ray multifunctional shielding polymer composite materials