Radiation Protection and Environment最新文献_第5页

Development of fluorescein-based dosimeter for radiation processing applications 用于辐射处理应用的荧光素剂量计的开发

Radiation Protection and Environment Pub Date : 2022-01-01 DOI: 10.4103/rpe.rpe_43_21

Sachin V. Mhatre, V. Sathian, Probal Chaudhury

{"title":"Development of fluorescein-based dosimeter for radiation processing applications","authors":"Sachin V. Mhatre, V. Sathian, Probal Chaudhury","doi":"10.4103/rpe.rpe_43_21","DOIUrl":"https://doi.org/10.4103/rpe.rpe_43_21","url":null,"abstract":"Dosimetry forms an inseparable part of radiation processing. Many dosimeters are available to cover wide range of doses used in radiation processing. These include the Fricke, ceric-cerous, alanine ESR Alanine (Electron Spin Resonance Technique), dichromate, and radiochromic films. Low-dose radiation processing applications (<2 kGy) such as insect disinfestation, shelf-life extension, and sprout inhibition use imported dosimeters. At present, radiochromic films/waveguides are used for low-dose applications; however, the dosimeters are costly and subject to sanctions and supply restrictions from country of origin. The present work discusses the development of system that can be used as a routine dosimeter for radiation processing facilities in the dose range of 200–2500 Gy. Iodine is generated by the action of radiolysis products of water on iodide and iodate present. Generated iodine halogenates fluorescein to erythrosine with the help of bicarbonate. Increase in absorbance due to the formation of erythrosine can be related to the absorbed dose and used in routine dosimetric applications. As the change is radiochromic, it advantageously provides a visual indication of dose received.","PeriodicalId":32488,"journal":{"name":"Radiation Protection and Environment","volume":"45 1","pages":"41 - 47"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42804446","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: 0

Medical management of ionizing radiation-induced skin injury 电离辐射致皮肤损伤的医学处理

Radiation Protection and Environment Pub Date : 2022-01-01 DOI: 10.4103/rpe.rpe_4_21

R. Goel, H. Ojha, Vikram Choudhary, Deepti Sharma, Ashrit Nair, Navneet Sharma, M. Pathak, H. Shivkumar, RakeshKumar Sharma, V. Kaushik, Rahul Singhal

引用次数: 0

A Decade of Online Publication of this Journal: Radiation Protection and Environment 本刊在线出版十年:辐射防护与环境

Radiation Protection and Environment Pub Date : 2022-01-01 DOI: 10.4103/rpe.rpe_16_22

D. Rao

引用次数: 0

Application of thermoelectric cooling module for sampling of tritium in air 热电冷却模块在空气中氚取样中的应用

Radiation Protection and Environment Pub Date : 2022-01-01 DOI: 10.4103/rpe.rpe_10_22

Lokesh Kumar, V. Shreenivas, Saurav Sood, P. Ashokkumar, Ranjit Sharma, M. Kulkarni

{"title":"Application of thermoelectric cooling module for sampling of tritium in air","authors":"Lokesh Kumar, V. Shreenivas, Saurav Sood, P. Ashokkumar, Ranjit Sharma, M. Kulkarni","doi":"10.4103/rpe.rpe_10_22","DOIUrl":"https://doi.org/10.4103/rpe.rpe_10_22","url":null,"abstract":"The sampling and measurement of airborne tritium is an essential component of workplace monitoring at heavy water handling facilities and nuclear reactors using heavy water as coolant and moderator. Tritium being an internal hazard, its workplace monitoring and assessment of internal exposure of workers is a regulatory requirement for the facility. The conventional tritium air sample collection methods are condensation, bubbling, and trapping with appropriate media such as dry ice, water, and desiccants, respectively. A novel method for rapid collection of moisture in the air for the estimation of tritium is presented and discussed in this article. It involves condensation of tritium oxide in the air using a commercially available thermoelectric cooling module which has removed uncertainty in the availability of dry ice or desiccant. The instrument is capable of collecting 2–3 ml of sample in 30 min at a relative humidity level of about 60% and temperature of about 25.5°C. The quantity of sample collected is sufficient for the estimation of tritium concentration in air. The Peltier module-based low-cost, simple, and reliable system has been successfully implemented for workplace tritium in air sampling at radiological facilities.","PeriodicalId":32488,"journal":{"name":"Radiation Protection and Environment","volume":"45 1","pages":"16 - 21"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44933708","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: 0

Experimental investigation of ion recombination in a locally made low-voltage ionization chamber 自制低压电离室中离子复合的实验研究

Radiation Protection and Environment Pub Date : 2022-01-01 DOI: 10.4103/rpe.rpe_36_21

Mahsa Noori-Asl, Hossein Afzal, M. Hamdipour

引用次数: 0

Salient features of IAEA-TECDOC-1951: Protection against exposure due to radon indoors and gamma radiation from construction materials - Methods of prevention and mitigation 原子能机构- tecdoc -1951的突出特点:防止室内氡和建筑材料产生的伽马辐射。预防和缓解方法

Radiation Protection and Environment Pub Date : 2021-07-01 DOI: 10.4103/rpe.rpe_42_21

D. Rao

引用次数: 0

Analysis of postoperation radiation hazards in inertial electrostatic confinement fusion neutron source facility at center of plasma physics under institute for plasma research 等离子体研究所等离子体物理中心惯性静电约束聚变中子源装置术后辐射危害分析

Radiation Protection and Environment Pub Date : 2021-07-01 DOI: 10.4103/rpe.rpe_20_21

H. Swami, S. Mohanty, S. Vala, R. Srinivasan, R. Kumar

{"title":"Analysis of postoperation radiation hazards in inertial electrostatic confinement fusion neutron source facility at center of plasma physics under institute for plasma research","authors":"H. Swami, S. Mohanty, S. Vala, R. Srinivasan, R. Kumar","doi":"10.4103/rpe.rpe_20_21","DOIUrl":"https://doi.org/10.4103/rpe.rpe_20_21","url":null,"abstract":"Center of Plasma Physics-Institute for Plasma Research, Nazirakhat, Assam, has the neutron source based on Inertial Electrostatic Confinement of Fusion. In order to scale up the source, it is planned to build a neutron source facility. The facility needs the construction approval from AERB India for occupational radiation safety during the operation and after the operation. It will also assess the short-term and long-term radiological hazards due to the neutron source. In order to evaluate the post irradiation radiation hazards due the neutron source, the radioactivation analysis of laboratory is carried out and reported here. The radioactivity in the laboratory building and source components after short-term and long-term operation has been assessed. The tritium activity in the soil is also evaluated. The calculation is also done for the contact dose rate estimations after operation to assess the maintenance applicability inside the laboratory. The inhalation dose inside the laboratory after the operation has been also calculated to avoid any hazards after operation maintenance activities. The article provides the complete details of post operation hazards analysis for the Inertial Electrostatic Confinement Fusion neutron source facility.","PeriodicalId":32488,"journal":{"name":"Radiation Protection and Environment","volume":"44 1","pages":"135 - 140"},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48227830","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: 0

Statistical analysis of extreme value of meteorological elements observed for the last 31 years (1989–2019) at Narora site 近31年(1989-2019)纳罗拉站点气象要素极值的统计分析

Radiation Protection and Environment Pub Date : 2021-07-01 DOI: 10.4103/rpe.rpe_27_21

Deepak Kumar, Y. Gautam, Vimal Kumar, S. Kumar, I. Saradhi, A. Kumar

{"title":"Statistical analysis of extreme value of meteorological elements observed for the last 31 years (1989–2019) at Narora site","authors":"Deepak Kumar, Y. Gautam, Vimal Kumar, S. Kumar, I. Saradhi, A. Kumar","doi":"10.4103/rpe.rpe_27_21","DOIUrl":"https://doi.org/10.4103/rpe.rpe_27_21","url":null,"abstract":"Understanding of extreme weather conditions at the site of interest is essentially required in the design of engineering structures so that the structures can withstand weather stresses. This paper presents an analysis of extreme values of meteorological elements observed at Narora site for the last three decades (1989–2019). The elements considered are extreme air temperature (°C), minimum relative humidity (%), extreme wind gust (km/h), maximum rainfall (mm) in a day and a month, and annual rainfall. The extreme value analysis reveals that the maximum air temperature, maximum wind gust at 30 m, maximum monthly rainfall, and maximum annual rainfall obey Fisher-Tippett Type-1/Gumbel extreme value distribution, whereas minimum air temperature, minimum relative humidity (%), annual daily maximum rainfall (mm), and annual minimum rainfall (mm) obey Fisher-Tippett Type-2/Frechet extreme value distribution function. Distribution function parameters, i.e., location, scale, and shape parameter for each variable, have been determined. Extreme values corresponding to return periods of 50, 100, and 1000 years are worked out using best fit linear regression curve as a compliance of the Atomic Energy Regulatory Board Safety Guide Recommendations. The derived extreme values are particularly useful to designer for arriving at suitable design basis values of different elements to ensure the safety of the reactors and other civil structures in Narora region, with respect to stresses due to weather conditions. Extreme values corresponding to return periods of 50 and 100 years at Narora are compared with corresponding values at other three nuclear reactor sites in India, namely, Tarapur, Kalpakkam, and Trombay. In addition, the time series pattern analysis of rainfall for 31 years at the Narora site closely following the 2-year moving average rainfall data pattern. These results can be used for water harvesting, irrigation, and floods management plans in the future.","PeriodicalId":32488,"journal":{"name":"Radiation Protection and Environment","volume":"44 1","pages":"123 - 130"},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43782584","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

Studies on foliar uptake of tritiated water on Spinach sp. during light and dark simulated conditions using environmental chamber 环境室模拟光照和黑暗条件下菠菜叶片对氚化水吸收的研究

Radiation Protection and Environment Pub Date : 2021-07-01 DOI: 10.4103/rpe.rpe_15_21

C. Joshi, A. Patra, M. Jha, V. Sudheendran, A. Baburajan, I. Saradhi, A. Vinodkumar

引用次数: 1

Assessment of heavy metal enrichment and contamination in the wetlands of Kannur district, Kerala 喀拉拉邦坎努尔地区湿地重金属富集与污染评价

Radiation Protection and Environment Pub Date : 2021-07-01 DOI: 10.4103/rpe.rpe_22_21

T. Vinodkumar, V. Vineethkumar, C. Vishnu, V. Sayooj, V. Prakash

{"title":"Assessment of heavy metal enrichment and contamination in the wetlands of Kannur district, Kerala","authors":"T. Vinodkumar, V. Vineethkumar, C. Vishnu, V. Sayooj, V. Prakash","doi":"10.4103/rpe.rpe_22_21","DOIUrl":"https://doi.org/10.4103/rpe.rpe_22_21","url":null,"abstract":"The present investigation is an attempt to trace the heavy metal enrichment in the soil matrix of the wetlands Kannur district, Kerala. Wetland is an ecosystem which plays significant role in ecological balance. Characteristic vegetation of aquatic plants makes this distinct ecosystem as unique and distinguishable from other land forms and water bodies. The hydric soil prevailing in the wetlands is rich in organic matter content and also enriched with many heavy metals. In view of this, the enrichment of some major heavy metals such as Co, Fe, Mg, Cu, Zn, Cd, Hg, Ni, Pb, and As have been quantified in the soil samples collected from the wetlands of southern part of Kerala using Inductively Coupled Plasma-Mass Spectrometer. The adverse effect of this enrichment on human and environment is of serious concern and hence various pollution index parameters were calculated to assess the extent of contamination. The spatial distribution study confirms the dependence of geological factors on the enrichment of heavy metals. The study on various pollution index parameters reveals the selective enrichment of heavy metals. The continuous monitoring of wetlands is the need of the time as such areas are preserved for the cultivation of aquatic plants. The results of the investigation are presented and discussed in detail in the manuscript.","PeriodicalId":32488,"journal":{"name":"Radiation Protection and Environment","volume":"44 1","pages":"152 - 160"},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48211119","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: 0