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Titolo:
Natural radioactivity and gamma dose from Sri Lankan clay bricks used in building construction
Autore:
Hewamanna, R; Sumithrarachchi, CS; Mahawatte, P; Nanayakkara, HLC; Ratnayake, HC;
Indirizzi:
Univ Colombo, Radioisotope Ctr, Colombo 03, Sri Lanka Univ Colombo Colombo Sri Lanka 03 adioisotope Ctr, Colombo 03, Sri Lanka Atom Energy Author, Colombo 11, Sri Lanka Atom Energy Author Colombo SriLanka 11 gy Author, Colombo 11, Sri Lanka
Titolo Testata:
APPLIED RADIATION AND ISOTOPES
fascicolo: 2, volume: 54, anno: 2001,
pagine: 365 - 369
SICI:
0969-8043(200102)54:2<365:NRAGDF>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
BY-PRODUCTS; DWELLINGS; RATES;
Keywords:
specific radioactivity concentrations; radiological hazard; annual effective dose;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Hewamanna, R Univ Colombo, Radioisotope Ctr, Colombo 03, Sri Lanka Univ Colombo Colombo Sri Lanka 03 tr, Colombo 03, Sri Lanka
Citazione:
R. Hewamanna et al., "Natural radioactivity and gamma dose from Sri Lankan clay bricks used in building construction", APPL RAD IS, 54(2), 2001, pp. 365-369

Abstract

The specific radioactivity concentrations of Ra-226, Th-232 and K-40 have been determined by gamma ray spectrometry with an HPGe detector in clay brick samples from kiln sites located in 17 towns. The average values of the measured activities are 35, 72, and 585 Bq kg(-1), respectively, for the above radionuclides. The average estimated radium equivalent concentration is 183 Bq kg(-1) and is comparable with reported values for many countries in the world. This value and the value obtained from the criteria formula suggest that the use of local clay bricks do not pose a radiological hazard. The calculated average absorbed dose rate in air within buildings was found to be 102 nCy h(-1) while the population weighted indoor annual effective dose was 0.20 mSv. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 12:21:23