Atom Indonesia最新文献_第5页

A Study on Radiation Hazard of Granite and Marble Widely Used in Jordan Using Gamma Ray Spectrometer 用伽马射线谱仪研究约旦广泛使用的花岗岩和大理石的辐射危害

IF 0.4

Atom Indonesia Pub Date : 2022-04-11 DOI: 10.17146/aij.2022.1184

A. Akour, S. Shakhatreh

{"title":"A Study on Radiation Hazard of Granite and Marble Widely Used in Jordan Using Gamma Ray Spectrometer","authors":"A. Akour, S. Shakhatreh","doi":"10.17146/aij.2022.1184","DOIUrl":"https://doi.org/10.17146/aij.2022.1184","url":null,"abstract":"Granite and marble are widely used in building construction, so possible radioactive nuclides inside them may contribute to the exposure dose to human health. The purpose of this study was to investigate the natural radioactivity concentration and assess the radiological risk limits and health care. The samples of marble and granite were pulverized into small, fine, smooth pieces and counted with the GAMMA-X (GMX) spectrometer to measure the radioactivity concentrations of 238 U, 232 Th, and 40 K. The radiological dose, internal and external hazards, and radium equivalent activity were calculated with a standard formula. The results showed that the radioactive concentrations of 238 U, 232 Th, and 40 K in granite were higher than those in marble. The external hazard for granite samples was below unity, while its internal hazard exceeded unity. The radium equivalent activity did not exceed the critical legal level of 370 Bq/kg as a safe level. For marble, the external and internal hazards and radium equivalent activities showed good agreement with the safe construction level. Its external and internal hazards were less than unity, whereas the radium equivalent activities were less than the critical legal level.","PeriodicalId":8647,"journal":{"name":"Atom Indonesia","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48410275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Correlations Between Body Weight and Size-Specific Dose Estimate on Thoracic Computed Tomography Examination 胸部计算机断层扫描检查中体重和尺寸比剂量估计的相关性

IF 0.4

Atom Indonesia Pub Date : 2022-04-06 DOI: 10.17146/aij.2022.1114

A. L. Wati, C. Anam, A. Nitasari, S. Syarifudin, G. Dougherty

{"title":"Correlations Between Body Weight and Size-Specific Dose Estimate on Thoracic Computed Tomography Examination","authors":"A. L. Wati, C. Anam, A. Nitasari, S. Syarifudin, G. Dougherty","doi":"10.17146/aij.2022.1114","DOIUrl":"https://doi.org/10.17146/aij.2022.1114","url":null,"abstract":"The dose received by a patient on CT examination is expressed in size-specific dose estimates (SSDE) which is a function of the patient diameter, x-ray attenuation, and scanner output (volume computed tomography dose index, CTDIvol). Patient diameter and x-ray attenuation are represented as water equivalent diameter (Dw). We conducted the research to analyze the relationships between body weight and Dw, CTDIvol, and size-specific dose estimates (SSDE) in contrast-enhanced thorax examinations. We used images from 100 patients (50 women and 50 men patients) whose weight range from 2.8 kg to 80 kg. The values of Dw, CTDIvol, and SSDE were automatically calculated from axial CT images using the IndoseCT software. Statistical analysis showed that the patient's body weight correlates linearly with the Dw. The linearity coefficient (R2) values for body weight and Dw is 0.43 (women) and 0.55 (men). However, weight was independent of the patient dose in terms of CTDIvol and SSDE. This was because the CT system used tube current modulation (TCM), which automatically adapted the tube current to patient size, resulting in a relatively constant dose regardless of the patient size (Dw).","PeriodicalId":8647,"journal":{"name":"Atom Indonesia","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48162583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Effect of Sub-energy Windows’ Parameters on the Triple Energy Window Scatter Correction Method Accuracy in 99mTc SPECT Imaging 亚能窗参数对99mTc-SPECT成像三能窗散射校正方法精度的影响

IF 0.4

Atom Indonesia Pub Date : 2022-04-04 DOI: 10.17146/aij.2022.1119

H. Saikouk, N. Khayati, A. Matrane

引用次数: 0

In Vitro Release of Metformin HCl from Polyvinyl Alcohol (PVA) - Gelatin Hydrogels Prepared by Gamma Irradiation 伽玛辐照制备聚乙烯醇-明胶水凝胶对盐酸二甲双胍的体外释放研究

IF 0.4

Atom Indonesia Pub Date : 2022-04-02 DOI: 10.17146/aij.2022.1123

H. Hariyanti, E. Erizal, E. Mustikarani, I. Lestari, F. Lukitowati

引用次数: 0

Detection of Spoilage in Canned Pasteurized Milk Using the Radiographic Imaging Technique 用射线成像技术检测巴氏灭菌乳罐头中的变质

IF 0.4

Atom Indonesia Pub Date : 2022-04-02 DOI: 10.17146/aij.2022.1161

D. T. Thuy, H. B. Tien, H. B. Ngọc, T. T. Kim, T. T. Ngoc

引用次数: 0

Systematic Projected Shell Model Study of Even-Even Dysprosium Isotopes 偶偶镝同位素的系统投影壳模型研究

IF 0.4

Atom Indonesia Pub Date : 2022-03-30 DOI: 10.17146/aij.2022.1190

H. Aghahasani, S. Mohammadi, Z. Sajjadi

引用次数: 0

The Effects of High Level Natural Radiation in Mamuju - Indonesia on the Immune System of Its Residents 印尼马穆朱高水平自然辐射对居民免疫系统的影响

IF 0.4

Atom Indonesia Pub Date : 2022-03-30 DOI: 10.17146/aij.2022.1118

D. Darlina, T. Rahardjo, H. N. E. Surniyantoro, N. Rahajeng, M. Syaifudin

引用次数: 0

The Evaluation of Fission Barrier Height by Fission Toy Model Approach 用裂变玩具模型法评价裂变势垒高度

IF 0.4

Atom Indonesia Pub Date : 2022-03-28 DOI: 10.17146/aij.2022.1154

R. Kurniadi, Z. Suud, Y. S. Perkasa

引用次数: 0

Skin Dosimetric Comparison of 3DCRT and IMRT Planning for Post-Mastectomy Breast Radiotherapy 乳腺切除术后3DCRT和IMRT皮肤放射治疗方案的剂量比较

IF 0.4

Atom Indonesia Pub Date : 2022-03-24 DOI: 10.17146/aij.2022.1105

F. K. Hentihu, A. Anto, R. S. Nugroho

引用次数: 1

Assessment of TMSR-500 Shutdown Capability TMSR-500关机能力评估

IF 0.4

Atom Indonesia Pub Date : 2022-03-15 DOI: 10.17146/aij.2022.1145

A. Khakim, F. R. Firmanda, Y. Pramono, S. Suharyana

{"title":"Assessment of TMSR-500 Shutdown Capability","authors":"A. Khakim, F. R. Firmanda, Y. Pramono, S. Suharyana","doi":"10.17146/aij.2022.1145","DOIUrl":"https://doi.org/10.17146/aij.2022.1145","url":null,"abstract":"The molten salt reactor (MSR) is a generation IV reactor with liquid fuel having nearly zero excess reactivity. Due to the very low excess reactivity, it requires a small number of control rods worth to shut down the reactor. However, as it operates at high temperatures, the core reactivity increases as the fuel temperature cools down during shutdown. In such a case, the control rods might not be able to keep the reactor at a subcritical state, and consequently, the fuel must be removed from the core for long-term shutdown into a fuel drain tank (FDT) below the core. This paper is intended to assess the shutdown capability of the first active shutdown system and fuel drain tank of ThorCon MSR by doing neutronic calculations with MCNP6. The results indicated that the control rods having reactivity worth -1.699 %dk/k are unable to maintain the core at a subcritical state as the core excess reactivity increases to +7.760 %dk/k when the fuel reaches room temperature. Therefore, the fuel must be drained to FDT to be cooled down and kept subcritical. Evaluation for various cases of FDT produced the highest multiplication factor of 0.57008 ± 0.00004 at the most conservative condition. The multiplication factor is well below the critical state of 1.0. The evaluations suggest that soon after the control rods shut the reactor down, the fuel has to be drained to FDT to maintain shutdown condition and dissipate the decay heat.","PeriodicalId":8647,"journal":{"name":"Atom Indonesia","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42852362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1