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Nagabushanam Srikanth Bhatt - One of the best experts on this subject based on the ideXlab platform.

  • e field computation in 765 kv substation using csm with reference to occupational exposure
    Iet Generation Transmission & Distribution, 2018
    Co-Authors: D Harimurugan, Gururaj S Punekar, Nagabushanam Srikanth Bhatt
    Abstract:

    With the increase in transmission voltage level, and the guidelines of the International Commission on Non-Ionising Radiation Protection (ICNIRP), the effects of Non-Ionising Radiation on biological elements at high-voltage substations have gained significant importance. The electric field ( E -field) distribution in an upcoming 765 kV substation in the Indian subcontinent is computed using the charge simulation method (CSM). CSM is used to model the 765 kV bays, transmission lines, buses, and ground wires in the substation. The three-dimensional (3D) E -field is calculated through the superimposition of E -fields obtained in two orthogonal planes using infinite-line charges. This proposed method of using infinite-line charges gives realistic results. The simplistic model using infinite-line charges greatly reduces the complexity of the CSM-based model (due to the reduced number of charges) apart from increasing the CSM-based model accuracies. This fact has been demonstrated by comparing these results with those of CSM-3D-model of a detailed bay model (including major equipment and associated support structures). The complex-charge-based CSM helps in computing the root mean square value of the E -field at a point, directly, as per ICNIRP guidelines. This RMS value of the E -field is compared with the occupational exposure reference value prescribed in the ICNIRP guidelines.

  • electric field computation in 765 kv substation using charge simulation method with reference to occupational exposure
    Iet Generation Transmission & Distribution, 2017
    Co-Authors: D Harimurugan, Gururaj S Punekar, Nagabushanam Srikanth Bhatt
    Abstract:

    With the increase in transmission voltage level, and the guidelines of the International Commission on Non-Ionising Radiation Protection (ICNIRP), the effects of Non-Ionising Radiation on biological elements at high-voltage substations have gained significant importance. The electric field ( E -field) distribution in an upcoming 765 kV substation in the Indian subcontinent is computed using the charge simulation method (CSM). CSM is used to model the 765 kV bays, transmission lines, buses, and ground wires in the substation. The three-dimensional (3D) E -field is calculated through the superimposition of E -fields obtained in two orthogonal planes using infinite-line charges. This proposed method of using infinite-line charges gives realistic results. The simplistic model using infinite-line charges greatly reduces the complexity of the CSM-based model (due to the reduced number of charges) apart from increasing the CSM-based model accuracies. This fact has been demonstrated by comparing these results with those of CSM-3D-model of a detailed bay model (including major equipment and associated support structures). The complex-charge-based CSM helps in computing the root mean square value of the E -field at a point, directly, as per ICNIRP guidelines. This RMS value of the E -field is compared with the occupational exposure reference value prescribed in the ICNIRP guidelines.

Sarah J Starkey - One of the best experts on this subject based on the ideXlab platform.

  • inaccurate official assessment of radiofrequency safety by the advisory group on non ionising Radiation
    Reviews on environmental health, 2016
    Co-Authors: Sarah J Starkey
    Abstract:

    The Advisory Group on Non-Ionising Radiation (AGNIR) 2012 report forms the basis of official advice on the safety of radiofrequency (RF) electromagnetic fields in the United Kingdom and has been relied upon by health protection agencies around the world. This review describes incorrect and misleading statements from within the report, omissions and conflict of interest, which make it unsuitable for health risk assessment. The executive summary and overall conclusions did not accurately reflect the scientific evidence available. Independence is needed from the International Commission on Non-Ionizing Radiation Protection (ICNIRP), the group that set the exposure guidelines being assessed. This conflict of interest critically needs to be addressed for the forthcoming World Health Organisation (WHO) Environmental Health Criteria Monograph on Radiofrequency Fields. Decision makers, organisations and individuals require accurate information about the safety of RF electromagnetic signals if they are to be able to fulfil their safeguarding responsibilities and protect those for whom they have legal responsibility.

Joachim Schuz - One of the best experts on this subject based on the ideXlab platform.

  • european code against cancer 4th edition ionising and non ionising Radiation and cancer
    Cancer Epidemiology, 2015
    Co-Authors: Neil Mccoll, Anssi Auvinen, Ausrele Kesminiene, Carolina Espina, Friederike Erdmann, Esther De Vries, Rudiger Greinert, John Harrison, Joachim Schuz
    Abstract:

    Ionising Radiation can transfer sufficient energy to ionise molecules, and this can lead to chemical changes, including DNA damage in cells. Key evidence for the carcinogenicity of ionising Radiation comes from: follow-up studies of the survivors of the atomic bombings in Japan; other epidemiological studies of groups that have been exposed to Radiation from medical, occupational or environmental sources; experimental animal studies; and studies of cellular responses to Radiation. Considering exposure to environmental ionising Radiation, inhalation of naturally occurring radon is the major source of Radiation in the population - in doses orders of magnitude higher than those from nuclear power production or nuclear fallout. Indoor exposure to radon and its decay products is an important cause of lung cancer; radon may cause approximately one in ten lung cancers in Europe. Exposures to radon in buildings can be reduced via a three-step process of identifying those with potentially elevated radon levels, measuring radon levels, and reducing exposure by installation of remediation systems. In the 4th Edition of the European Code against Cancer it is therefore recommended to: "Find out if you are exposed to Radiation from naturally high radon levels in your home. Take action to reduce high radon levels". Non-Ionising types of Radiation (those with insufficient energy to ionise molecules) - including extremely low-frequency electric and magnetic fields as well as radiofrequency electromagnetic fields - are not an established cause of cancer and are therefore not addressed in the recommendations to reduce cancer risk.

Anssi Auvinen - One of the best experts on this subject based on the ideXlab platform.

  • european code against cancer 4th edition ionising and non ionising Radiation and cancer
    Cancer Epidemiology, 2015
    Co-Authors: Neil Mccoll, Anssi Auvinen, Ausrele Kesminiene, Carolina Espina, Friederike Erdmann, Esther De Vries, Rudiger Greinert, John Harrison, Joachim Schuz
    Abstract:

    Ionising Radiation can transfer sufficient energy to ionise molecules, and this can lead to chemical changes, including DNA damage in cells. Key evidence for the carcinogenicity of ionising Radiation comes from: follow-up studies of the survivors of the atomic bombings in Japan; other epidemiological studies of groups that have been exposed to Radiation from medical, occupational or environmental sources; experimental animal studies; and studies of cellular responses to Radiation. Considering exposure to environmental ionising Radiation, inhalation of naturally occurring radon is the major source of Radiation in the population - in doses orders of magnitude higher than those from nuclear power production or nuclear fallout. Indoor exposure to radon and its decay products is an important cause of lung cancer; radon may cause approximately one in ten lung cancers in Europe. Exposures to radon in buildings can be reduced via a three-step process of identifying those with potentially elevated radon levels, measuring radon levels, and reducing exposure by installation of remediation systems. In the 4th Edition of the European Code against Cancer it is therefore recommended to: "Find out if you are exposed to Radiation from naturally high radon levels in your home. Take action to reduce high radon levels". Non-Ionising types of Radiation (those with insufficient energy to ionise molecules) - including extremely low-frequency electric and magnetic fields as well as radiofrequency electromagnetic fields - are not an established cause of cancer and are therefore not addressed in the recommendations to reduce cancer risk.

Ausrele Kesminiene - One of the best experts on this subject based on the ideXlab platform.

  • european code against cancer 4th edition ionising and non ionising Radiation and cancer
    Cancer Epidemiology, 2015
    Co-Authors: Neil Mccoll, Anssi Auvinen, Ausrele Kesminiene, Carolina Espina, Friederike Erdmann, Esther De Vries, Rudiger Greinert, John Harrison, Joachim Schuz
    Abstract:

    Ionising Radiation can transfer sufficient energy to ionise molecules, and this can lead to chemical changes, including DNA damage in cells. Key evidence for the carcinogenicity of ionising Radiation comes from: follow-up studies of the survivors of the atomic bombings in Japan; other epidemiological studies of groups that have been exposed to Radiation from medical, occupational or environmental sources; experimental animal studies; and studies of cellular responses to Radiation. Considering exposure to environmental ionising Radiation, inhalation of naturally occurring radon is the major source of Radiation in the population - in doses orders of magnitude higher than those from nuclear power production or nuclear fallout. Indoor exposure to radon and its decay products is an important cause of lung cancer; radon may cause approximately one in ten lung cancers in Europe. Exposures to radon in buildings can be reduced via a three-step process of identifying those with potentially elevated radon levels, measuring radon levels, and reducing exposure by installation of remediation systems. In the 4th Edition of the European Code against Cancer it is therefore recommended to: "Find out if you are exposed to Radiation from naturally high radon levels in your home. Take action to reduce high radon levels". Non-Ionising types of Radiation (those with insufficient energy to ionise molecules) - including extremely low-frequency electric and magnetic fields as well as radiofrequency electromagnetic fields - are not an established cause of cancer and are therefore not addressed in the recommendations to reduce cancer risk.

  • exposure to diagnostic Radiation and risk of breast cancer among carriers of brca1 2 mutations retrospective cohort study gene rad risk
    BMJ, 2012
    Co-Authors: Anouk Pijpe, Ausrele Kesminiene, Nadine Andrieu, Douglas F Easton, Elisabeth Cardis, Catherine Nogues, Marion Gauthiervillars, Christine Lasset
    Abstract:

    Objective To estimate the risk of breast cancer associated with diagnostic Radiation in carriers of BRCA1/2 mutations. Design Retrospective cohort study (GENE-RAD-RISK). Setting Three nationwide studies (GENEPSO, EMBRACE, HEBON) in France, United Kingdom, and the Netherlands, Participants 1993 female carriers of BRCA1/2 mutations recruited in 2006-09. Main outcome measure Risk of breast cancer estimated with a weighted Cox proportional hazards model with a time dependent individually estimated cumulative breast dose, based on nominal estimates of organ dose and frequency of self reported diagnostic procedures. To correct for potential survival bias, the analysis excluded carriers who were diagnosed more than five years before completion of the study questionnaire. Results In carriers of BRCA1/2 mutations any exposure to diagnostic Radiation before the age of 30 was associated with an increased risk of breast cancer (hazard ratio 1.90, 95% confidence interval 1.20 to 3.00), with a dose-response pattern. The risks by quarter of estimated cumulative dose Conclusion In this large European study among carriers of BRCA1/2 mutations, exposure to diagnostic Radiation before age 30 was associated with an increased risk of breast cancer at dose levels considerably lower than those at which increases have been found in other cohorts exposed to Radiation. The results of this study support the use of Non-Ionising Radiation imaging techniques (such as magnetic resonance imaging) as the main tool for surveillance in young women with BRCA1/2 mutations.