MONITORING AND CHARACTERISATION OF NEW EVIDENCE OF NATURAL RADIONUCLIDES IN ROCK OUTCROPS IN PARAiBA-BRAZIL

被引：4

作者：

do Nascimento Santos, Josineide Marques ^{[1
]}

Santos Junior, Jose Araujo S. ^{[1
]}

Amaral, Romilton S. Santos ^{[1
]}

Fernandez, Zahily Herrero ^{[1
]}

Bezerra, Jairo Dias ^{[1
]}

Cavalcanti Freire Bezerra, Mariana Brayner ^{[1
]}

Casado da Silva, Arykerne Nascimento ^{[1
]}

Nobrega de Araujo, Eduardo Eudes ^{[1
]}

Valcarcel Rojas, Lino Angel ^{[1
]}

Milan, Marvic Ortueta ^{[1
]}

de Barros Correia, Filipe Lopes ^{[1
]}

机构：

[1] Univ Fed Pernambuco, Technol & Geosci Ctr, Nucl Energy Dept, Radioecol Grp, Ave Prof Luiz Freire 1000,Cidade Univ, BR-50740545 Recife, PE, Brazil

来源：

RADIATION PROTECTION DOSIMETRY | 2019年 / 187卷 / 03期

关键词：

BUILDING-MATERIALS; RADIOLOGICAL HAZARDS; RADIOACTIVITY LEVELS; RADIATION; INDEXES; INDOOR; CITY;

D O I：

10.1093/rpd/ncz166

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The radiometric monitoring carried out in the present study allowed the discovery of anomalous granite outcrops in natural radionuclides in the rural area of SAo Mamede in the state of Paraiba, Brazil. The characterisation study made it possible to determine maximum specific concentrations of approximately 199 kBq kg(-1) of U-238, 85 kBq kg(-1) of Ra-226, 26 kBq kg(-1) of Th-232 and 24 kBq kg(-1) of K-40. Models for environmental dosimetry were applied, which resulted in obtaining the following quantities: radium equivalent (Ra-eq), indices of external (H-ex), internal (H-in) and representative (I-yr) damage, and the effective outdoor dose (H-E). The maximum results presented were approximately 123 kBq kg(-1), 332, 562, 832, and 68 mSv y(-1), respectively. Consequently, it was possible to define the region as of high radioactive background due to isolated rocky outcrops located in the rural area of the mentioned municipality.

引用

页码：310 / 320

页数：11

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