National standards with regard to 226Ra, 232Th and 40K in building materials.
ofcourse there are stipulated limits, am not sure for Nigeria though. and it is high time we have such and for all categories of environmental media
I think you can find more answer by google web site, just print the key word such as “natural radioacivity in building material”， and search
i think that is good reference,see artical:Natural Radioactivity and Radon in Building Materials (Gustavo Haquin ) ,web site:
http://www.irpa12.org.ar/KL/III.4.4/Haquin_fp.pdf
The European Commission (EC) set guidelines on the radiological protection principles concerning the natural radioactivity of building materials (RP-112 document) for the Member States. The majority of the EU Member States comply with the recommendations in the RP-112 document, some of them implementing it into their national regulations.
There are recommendations, for instances, about the limit concentrations, in inddor air, resulting from the radon emmissions. The concentration should be less than 400Bq/m3, in most European countries.
For radon emission one good reference is http://www.sciencedirect.com/science/journal/01466453/40/1.
In Brazil there are limits to the use of phosphogypsum in agriculture but not in building materials. In Brazil it is possible to deposit materials in landfill with lower concentrations than 75Bq / g. Soon this would be a threshold value for the use of materials with radionuclides in building materials (my interpretation of legislation)
The EU requirements for MS standards are in the BSS Directive 2013:
http://eur-lex.europa.eu/legal-content/EN/TXT/?uri=uriserv:OJ.L_.2014.013.01.0001.01.ENG
The BG standards are in Regulation No. 25 of 2005:
http://econ.bg/%D0%9D%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B8%D0%B2%D0%BD%D0%B8-%D0%B0%D0%BA%D1%82%D0%BE%D0%B2%D0%B5/%D0%9D%D0%B0%D1%80%D0%B5%D0%B4%D0%B1%D0%B0-25-%D0%BE%D1%82-22-%D1%8E%D0%BB%D0%B8-2005-%D0%B3-%D0%B7%D0%B0-%D0%B8%D0%B7%D0%B8%D1%81%D0%BA%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F%D1%82%D0%B0-%D0%B7%D0%B0-%D0%B7%D0%B0%D1%89%D0%B8%D1%82%D0%B0-%D0%BD%D0%B0-%D0%BB%D0%B8%D1%86%D0%B0%D1%82%D0%B0-%D0%BF%D1%80%D0%B8-%D1%85%D1%80%D0%BE%D0%BD%D0%B8%D1%87%D0%BD%D0%BE-%D0%BE%D0%B1%D0%BB%D1%8A%D1%87%D0%B2%D0%B0%D0%BD%D0%B5-%D0%B2-_l.l_i.129794_at.5.html
Regards, VB
- Badges
- Science topic
- Similar topics
- Linguistics
- Composition Studies
- Publication