Radioactive atmospheric discharges of the European and Russian nuclear power plants

Comparison of radionuclide specific indicators in airborne discharges to atmosphere from European and Russian nuclear power plants was carried out. The performed analysis allows determining airborne discharge structure and the environmental impact of nuclear power plant with different types of reactor. Analysis of experimental data on radioactive airborne discharges from Russian nuclear power plants is carried out. The nuclear power plants with three different kinds of reactors are investigated. The performed analysis allows determining the list of radionuclides in airborne discharges, which give from 84 to 99 % of radiation exposure population. © RAD Conference Proceedings. All rights reserved

Study of neutron energy and directional distribution at the Beloyarsk NPP selected workplaces

Energy and directional distribution of neutrons at the Beloyarsk NPP workplaces is a subject of this study. Measurements of H∗(10) rate and neutron energy distribution were taken at 8 workplaces, which can be divided into three categories: work with spent or fresh nuclear fuel, work with radionuclide neutron sources, work at the rooms adjusted to reactors. The Hp(10) measurements were performed only at 6 out of 8 locations, due to the fact that long term placing of an effective neutron moderator in fresh nuclear fuel storage facility is forbidden. As a result of the research energy and direction distribution of the neutron fields at 8 locations of the Beloyarsk NPP workplaces was obtained. To estimate the accuracy of the H∗(10) rate and Hp (10) measurements the reference values of dose equivalents were calculated using energy and directional distribution. To take into account the difference between the reference values and the measured results site-specific correction factors were calculated. © 2020 Korean Nuclear SocietyThe reported study was funded by RFBR project number 19-38-90096

MEASUREMENT OF RADIATION BACKGROUND IN THE VILLAGE OF NIZHNYAYA ILENKA, BAIKALOVSKY DISTRICT, SVERDLOVSK REGION

A study of the gamma radiation dose rate in the village of Nizhnyaya Ilenka, Baikalovsky District, Sverdlovsk Region was conducted. The ambient equivalent dose rate does not exceed 0.13 μSv/h, no sites with elevated natural background radiation were found

CONSERVATIVE ASSESSMENT OF DUST ACTIVITY IN A LOCALITY

Assessment of consistency of regulatory requirements in field of limiting atmospheric air pollution with chemicals and radioactive substances has been carried out. 10 radionuclides with maximum value of calculated volumetric activity were determined in compliance with standards of air dustiness

EVALUATION OF TRITIUM’S ENTRY INTO THE ENVIRONMENT FROM NUCLEAR POWER PLANTS’ EMISSIONS

This work presents the results of data collections of nuclear power plants’ distribution in the world by types of nuclear power reactors and also the generation of electricity for each reactor separately for the period 1954-2016. Based on the results, an estimate was made of tritiums’s entry into the environment for the entire operation period of the power units, taking into account its decay

Monitoring of Radioactive Releases in the Middle Urals

The report presents the results of long-term monitoring of the ambient dose equivalent rate, total beta-activity of atmospheric fallout and aerosols, as well as the activity of Cs-137 and Sr-90 radionuclides in atmospheric fallout and aerosols at the Verkhneye Dubrovo weather station

Dynamics Investigation of Emissions Noble Radioactive Gases during Normal Operation of Industrial Nuclear Reactor

The results of noble gases emissions monitoring of industrial nuclear reactor emissions during the campaign, after a shutdown for scheduled preventive maintenance and after a physical start-up with a subsequent increase in power are shows

DEVELOPMENT OF HARDWARE-SOFTWARE SOLUTION FOR MODELING OF RADIOACTIVE IMPURITIES ATMOSPHERIC SCATTERING

Hardware-software solution for athmospheric scattering of radioactive impurities model-ing were being developed. Other tools for such analisys were reviewed. Demonstration of intermediary software blocks is presented

RELEASE OF RADIOACTIVE IODINE IN THE ATMOSPHERE DURING NPP NORMAL OPERATION

The analysis of data on emissions and discharges for the period from 2005 to 2018 of iodine isotopes for 68 US nuclear power plants with reactor of the PWR and BWR type