Analyses of slag and ash samples performed between 2019 and 2023, with a focus on radioactive equilibrium in natural decay series

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652052%3A_____%2F25%3AN0000004" target="_blank" >RIV/86652052:_____/25:N0000004 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1140/epjp/s13360-025-06526-3" target="_blank" >https://link.springer.com/article/10.1140/epjp/s13360-025-06526-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjp/s13360-025-06526-3" target="_blank" >10.1140/epjp/s13360-025-06526-3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Analyses of slag and ash samples performed between 2019 and 2023, with a focus on radioactive equilibrium in natural decay series

Popis výsledku v původním jazyce

Products of coal combustion (especially ash and slag) are commonly used as raw materials in the production of building materials. Such building materials need to meet the legislative criteria based on the determination of 40K, 226Ra and 232Th activities, which are used for the Activity Concentration Index calculation. The Czech national authority issued a Recommendation concerning gamma spectrometric activity assessment in building materials. This document assumes an intact radioactive equilibrium in the decay series, therefore 226Ra does not have to be determined from the activities of radon daughters. Instead, it can be determined directly from the 186 keV peak, with 226Ra making up 57.5 % of the total peak area. This approach significantly simplifies and shortens the determination of 226Ra, since the sample containers do not have to be hermetically sealed and there is no need to wait for the equilibrium. From 2019 to 2023, the National Radiation Protection Institute analysed over 139 slag and ash samples produced in the Czech Republic. The 226Ra activity concentration was determined from the daughter products of radon decay (214Bi and 214Pb), and directly from the 186 keV peak. The 238U activity concentration was determined from decay products (234mPa or 234Th) and by calculation from 235U. Based on the statistical comparison of the activities obtained using different approaches, the assumption of the equilibrium in the decay series can be verified.

Název v anglickém jazyce

Analyses of slag and ash samples performed between 2019 and 2023, with a focus on radioactive equilibrium in natural decay series

Popis výsledku anglicky

Products of coal combustion (especially ash and slag) are commonly used as raw materials in the production of building materials. Such building materials need to meet the legislative criteria based on the determination of 40K, 226Ra and 232Th activities, which are used for the Activity Concentration Index calculation. The Czech national authority issued a Recommendation concerning gamma spectrometric activity assessment in building materials. This document assumes an intact radioactive equilibrium in the decay series, therefore 226Ra does not have to be determined from the activities of radon daughters. Instead, it can be determined directly from the 186 keV peak, with 226Ra making up 57.5 % of the total peak area. This approach significantly simplifies and shortens the determination of 226Ra, since the sample containers do not have to be hermetically sealed and there is no need to wait for the equilibrium. From 2019 to 2023, the National Radiation Protection Institute analysed over 139 slag and ash samples produced in the Czech Republic. The 226Ra activity concentration was determined from the daughter products of radon decay (214Bi and 214Pb), and directly from the 186 keV peak. The 238U activity concentration was determined from decay products (234mPa or 234Th) and by calculation from 235U. Based on the statistical comparison of the activities obtained using different approaches, the assumption of the equilibrium in the decay series can be verified.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

The European Physical Journal Plus

ISSN

2190-5444

e-ISSN

2190-5444

Svazek periodika

140

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

7

Strana od-do

581

Kód UT WoS článku

001514435400001

EID výsledku v databázi Scopus

2-s2.0-105008825325