Turhan Ş, Demir K, Karataşlı M
Department of Physics, Faculty of Science and Letters, Kastamonu University, 37150 Kastamonu, Turkey.
Department of Physics, Institute of Science, Nevşehir Hacı Bektaş Veli University, 50300 Nevşehir, Turkey.
Appl Radiat Isot. 2018 Nov;141:95-100. doi: 10.1016/j.apradiso.2018.08.022. Epub 2018 Aug 30.
In this study, clay brick (CBRICK) and pumice brick (PBRICK) samples used as structural material in the construction of dwellings, schools, workplaces and factories in Turkey were compared with each other from a radiological viewpoint. The activity concentrations of Ra, Th and K naturally occurring in CBRICK and PBRICK samples collected from different regions of Turkey were determined by using a gamma-ray spectrometer with a high purity germanium detector (HPGe). The average activity concentrations of Ra, Th and K in CBRICK and PBRICK samples were found as 35.4 ± 3.3, 37.5 ± 2.4 and 593.7 ± 42.7 Bq kg and 81.9 ± 2.5, 65.8 ± 6.0 and 1066.0 ± 46.6 Bq kg, respectively. The radon surface exhalation rate (EX) and radon mass exhalation rate (EX) of CBRICK and PBRICK samples were measured by using an active radon gas analyzer with an accumulation container. The average value of EX and EX of CBRICK and PBRICK samples found as 45.9 ± 2.9 mBq m h and 3.7 ± 2.9 mBq kg h and 100.9 ± 4.7 mBq m h and 9.9 ± 0.5 mBq kg h, respectively. Radiological parameters related to external and internal exposure to members of the public such as the radiation protection index, alpha index, and indoor absorbed gamma radiation dose rate and the corresponding annual effective dose from external exposure, annual effective dose from inhalation of radon, and the lifetime cancer risk were estimated for CBRICK and PBRICK samples. The results were compared with each other and with the international recommended limits or criteria. The results reveal that the average values measured and estimated for CBRICK samples are approximately two times lower than those measured and estimated for PBRICK samples. Thus, from the radiological viewpoint, clay brick is preferable to pumice brick as a structural material in the building sector.
在本研究中，从放射学角度对土耳其住宅、学校、工作场所和工厂建筑中用作结构材料的粘土砖（CBRICK）和浮石砖（PBRICK）样本进行了相互比较。使用配备高纯锗探测器（HPGe）的伽马射线光谱仪测定了从土耳其不同地区采集的CBRICK和PBRICK样本中天然存在的镭（Ra）、钍（Th）和钾（K）的活度浓度。CBRICK和PBRICK样本中Ra、Th和K的平均活度浓度分别为35.4±3.3、37.5±2.4和593.7±42.7 Bq/kg以及81.9±2.5、65.8±6.0和1066.0±46.6 Bq/kg。使用带有累积容器的有源氡气分析仪测量了CBRICK和PBRICK样本的氡表面析出率（EX）和氡质量析出率（EX）。CBRICK和PBRICK样本的EX和EX平均值分别为45.9±2.9 mBq/m²·h和3.7±2.9 mBq/kg·h以及100.9±4.7 mBq/m²·h和9.9±0.5 mBq/kg·h。针对CBRICK和PBRICK样本估算了与公众外部和内部照射相关的放射学参数，如辐射防护指数、α指数、室内吸收伽马辐射剂量率以及相应的外部照射年有效剂量率、吸入氡的年有效剂量率和终生癌症风险。将结果相互比较，并与国际推荐限值或标准进行比较。结果表明，CBRICK样本的测量值和估算值平均值比PBRICK样本的测量值和估算值平均值低约两倍。因此，从放射学角度来看，在建筑行业中，粘土砖作为结构材料比浮石砖更可取。
