scholarly journals Physics-Based Probabilistic Model of the Effects of Ionizing Radiation on Polymeric Insulators of Electric Cables used in Nuclear Power Plants

2019 ◽  
Author(s):  
Ali Mosleh ◽  
Mohamad Al-Sheikhly ◽  
Yuan -Shang Chang ◽  
Richard Reister
Keyword(s):  
Ionizing Radiation ◽  
Probabilistic Model ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Polymeric Insulators ◽  
Electric Cables

scholarly journals Radio-Oxidation Ageing of XLPE Containing Different Additives and Filler: Effect on the Gases Emission and Consumption

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2845
Author(s):  
Muriel Ferry ◽  
Floriane Carpentier ◽  
Manon Cornaton
Keyword(s):  
End Of Life ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Insulator Layer ◽  
Insulating Material ◽  
Dose Rates ◽  
Electric Cables ◽  
Lifetime Extension

In the lifetime extension of nuclear power plants (NPPs) context, aging of electric cables has to be very well understood in order to predict their end-of-life and thus to replace them on time. Therefore, evaluation and understanding of the ageing mechanism of the cable insulating material is mandatory under conditions as close as possible of those encountered in NPPs. In this context, different formulated crosslinked polyethylenes (XLPE)—one of the polymers used nowadays to manufacture the insulator layer—have been irradiated under oxidative conditions, at two different dose rates and at different aging doses. Gases emitted and consumed from the irradiated polymers were quantified to identify the primary processes happening in the materials and thus the interactions involved between the different molecules composing the formulated polymers.

scholarly journals ODONTOLOGICAL EFFECTS OF IONIZING RADIATION (review)

2020 ◽  
Vol 25 ◽  
pp. 18-55
Author(s):  
D. Afanasyev ◽  
◽  
S. Liubarets ◽  
Keyword(s):  
Radiation Therapy ◽  
Dental Caries ◽  
Ionizing Radiation ◽  
Nuclear Power ◽  
Power Plants ◽  
Radiation Effects ◽  
Nuclear Power Plants ◽  
Radiation Safety ◽  
Facial Skeleton ◽  
Periodontal Tissues

Background. Odontological effects of ionizing radiation (IR) as a result of radiotherapy, the consequences of acci-dents at nuclear power plants and industry, individual occupational exposure, etc. deserve significant attention interns of radiation medicine and radiation safety. Objective: to analyze and summarize clinical and experimental data on the odontological radiation effects. Materials and methods. Object: the pathological changes in the hard tissues of teeth, pulp, periodontium, mucous membranes of the mouth and jaws due to exposure to IR. Method: search in the PubMed / MEDLINE, Google Scholar abstract medical and biological databases, scientific libraries of the relevant sources of scientific information. Results. Radiobiological effects of IR due to its direct and indirect action are manifested throughout the period of odontogenesis and formation of the facial skeleton. Experimental and clinical data (in children and adults) indicate the increased risk of dental caries, reduction of pain threshold and vascularization of tooth pulp along with its fibrosis and atrophy, periodontal dysfunction, which predispose to a high probability of tooth loss. Abnormalities in the activity of osteoblasts and cementoblasts of dental periosteum and osteoblasts of alveolar process in combination with circulatory disorders due to endothelial cell death, hyalinization, thrombosis and vascular obliteration increase the risk of jaw osteoradionecrosis. Children who have undergone a prenatal exposure to IR as a result of the Chornobyl NPP accident have a premature change of teeth. Deterioration of periodontal tissues and early development of acute and complicated dental caries are typical for children and adults affected by the Chornobyl disaster. Conclusions. Summarized data on the effects of radiation exposure under different conditions on teeth primordia (i.e. immature teeth), their formation and eruption in experimental and clinical settings, as well as on the odontological radiation effects in adults are summarized. Condition of the teeth in the Chornobyl NPP accident survivors is described. Understanding and taking into account the radiobiological odontological effects is necessary in the light of planning, preparing, and conducting local radiation therapy and developing the standards of radiation safety and measures to protect professionals and the public in the event of possible radiation accidents at the nuclear power plants and industry facilities. Key words: ionizing radiation, radiation therapy, Chornobyl NPP accident, odontology, tooth enamel, dentin, pulp, periodontium, caries, odontogenesis.

Work structure in nuclear power plants

1983 ◽  
Author(s):  
Marjorie B. Bauman ◽  
Richard F. Pain ◽  
Harold P. Van Cott ◽  
Margery K. Davidson
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Work Structure

Life Extension of Nuclear Power Plants: World Situation and the USA Case

2010 ◽  
pp. 50-56 ◽  
Author(s):  
Pablo T. León ◽  
Loreto Cuesta ◽  
Eduardo Serra ◽  
Luis Yagüe
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Life Extension ◽  
The Usa
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