Assessment of effective doses based on various radon measuring techniques

master's thesis

Nataša Smrekar (Author), Janja Vaupotič (Mentor)

Abstract

In my master's thesis, I have focused on radon gas in 43 buildings used for different purposes (23 schools, 3 kindergartens, 16 offices and a residential house) in which preliminary measurements had shown higher concentrations of radon gas. I carried out measurements of radon and short-lived radon products whilst simultaneously employing different measurement techniques. In all 43 buildings, I measured the instantaneous concentration of radon by using scintillation cells; in 18 buildings, I additionally measured the average concentration of radon by using solid state nuclear track detectors and in 10 buildings, I measured concentration retrospectively with solid state nuclear track detectors. In four selected buildings (a school, a kindergarten, an office and a residential house), I carried out the measurements by using all of the available equipment. I monitored the daily fluctuations of concentration of radon and short-lived radon products by using continuous monitors in 14 buildings. This is how I obtained the factor of radioactive equilibrium between radon and its short-lived products. Based on the results obtained, I calculated the effective doses. As the basis for calculating the doses, I used the instantaneous and average concentrations of radon and the equilibrium factor taken from literature (0.40) or own measurements. I compared the doses and critically evaluated them. In contrast to the previous research, I researched radon exclusively in areas with increased risk for radon. I studied the influence of the working regime on the concentration of radon in different working environments (i.e. a school, a kindergarten and an office).

Keywords

Radon;short-lived radon products;measurement technique;scintillation cell;solid-state nuclear track detector;retrospective detector;equilibrium factor;effective dose;comparison.;

Data

Language:	English
Year of publishing:	2016
Typology:	2.09 - Master's Thesis
Organization:	UNG FPŠ - Graduate School
Publisher:	[N. Smrekar]
UDC:	54
COBISS:	4513275
Views:	5358
Downloads:	275
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary title:	OCENA EFEKTIVNIH DOZ RADONA, KI TEMELJIJO NA RAZLIČNIH MERILNIH TEHNIKAH
Secondary abstract:	V svoji magistrski nalogi sem se osredotočila na radon v 43 zgradbah različne namembnosti (23 šol, 3 vrtci, 16 pisarn in stanovanjska hiša), kjer so predhodne meritve pokazale povišane koncentracije. Izvedla sem meritve radona in radonovih kratkoživih produktov in pri tem sočasno uporabila različne merilne tehnike. V vseh 43 zgradbah sem izmerila trenutno koncentracijo radona s scintilacijskimi celicami, v 18 zgradbah dodatno tudi povprečno koncentracijo z detektorji jedrskih sledi in v 10 zgradbah retrospektivno koncentracijo z detektorji jedrskih sledi. V štirih izbranih zgradbah (šola, vrtec, pisarna, stanovanjska hiša) sem izvedla meritve z vso razpoložljivo opremo. Dnevno spreminjanje koncentracije radona in radonovih kratkoživih produktov sem spremljala s kontinuirnimi merilniki v 14 zgradbah in tako dobila faktor radioaktivnega ravnotežja (ravnotežni faktor) med radonovimi kratkoživimi produkti in radonom. Na osnovi dobljenih rezultatov sem ocenila efektivne doze. Kot osnovo za izračun doz sem uporabila izmerjene trenutne in povprečne koncentracije radona ter ravnotežni faktor iz literature (0.40) ali meritev. Doze sem primerjala med seboj in jih kritično ocenila. Za razliko od dosedanjih raziskav, sem radon preiskovala izključno na področjih s povečanim tveganjem. Študirala sem vpliv delovnega režima na koncentracijo radona v različnih delovnih okoljih (šola, vrtec, pisarna).
Secondary keywords:	radon;radonovi kratkoživi razpadni produkti;merilne tehnike;scintilacijske celice;detektorji jedrskih sledi;retro detektorji;ravnotežni faktor;dozni pretvorbeni faktor;efektivna doza;primerjave;magistrske naloge;
URN:	URN:SI:UNG
Type (COBISS):	Master's thesis
Thesis comment:	Univ. v Novi Gorici, Fak. za podiplomski študij
Pages:	81 str.
ID:	9166442