scholarly journals Engineering and Ecological Assessment of Nuclear Powered Ships Dismantling

2015 ◽  
Vol 4 (3) ◽  
pp. 3-11
Author(s):  
Хвостова ◽  
Marina Khvostova
Keyword(s):  
Spent Nuclear Fuel ◽  
Radiation Safety ◽  
Nuclear Reactors ◽  
High Reliability ◽  
Ecological Assessment ◽  
Ecological Safety ◽  
Nuclear And Radiation Safety ◽  
Basic Approaches ◽  
Major Factors ◽  
Population And Environment

The article considers basic approaches to dismantling of nuclear-powered guided missile heavy cruisers on the example of the nuclear-powered guided missile heavy cruiser "Admiral Ushakov", as well as conceptual questions of safety during planned dismantling. The major factors that have impact on choosing the strategy of dismantling and on ensuring nuclear, radiation and ecological safety of the personnel, population and environment during dismantling are considered. The conclusion is that maintaining and servicing decommissioned nuclear powered ships and their reactor installations, along with operations in the course of subsequent dismantling of nuclear powered ships have no fundamental differences from the corresponding conditions and operations for nuclear submarines. “Shiprepairing Center “Zvezdochka” JSC has longterm experience of maintaining and dismantling nuclear submarines, including fuel discharge of dozens of marine reactor plants. This experience convincingly confirms high reliability of procedures (including on nuclear and radiation safety and on inadmissible impacts on environment) embedded into domestic projects of marine reactor plants, and acceptability of regulations and technologies applied by “Shiprepairing Center “Zvezdochka” JSC during corresponding operations including such potentially dangerous ones as discharging nuclear reactors and further treatment of the spent nuclear fuel.

scholarly journals Nuclear and Radiation Safety of the Centralized Spent Fuel Storage Facility in Ukraine

2017 ◽  
pp. 3-10
Author(s):  
O. Hryhorash ◽  
O. Dybach ◽  
S. Kondratiev ◽  
O. Horbachenko ◽  
A. Panchenko ◽  
...  
Keyword(s):  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Radiation Safety ◽  
Storage Facility ◽  
Spent Fuel ◽  
Regulatory Documents ◽  
Thermal Regimes ◽  
Fuel Storage ◽  
Nuclear And Radiation Safety ◽  
Biological Protection

The paper presents the analysis of ensuring nuclear and radiation safety in the management of spent nuclear fuel at the Centralized SFSF and activities planned for Centralized SFSF lifecycle stages. There are results of comparing requirements of U.S. regulatory documents used by the HOLTEC Company to design Centralized SFSF equipment staff with relevant requirements of Ukrainian regulations, results based on analysis of the most important factors of Centralized SFSF safety (strength and reliability, nuclear safety, thermal regimes and biological protection) and verified expert calculations of the SSTC NRS. The paper includes issues to be considered in further implementation of Centralized SFSF project.

scholarly journals The Work Results of the Institute for Safety Problems of Nuclear Power Plants of the NAS of Ukraine in 2019

2020 ◽  
Vol 18 ◽  
pp. 111-121
Author(s):  
D. I. Khvalin ◽  
◽  
I. V. Kutsyna ◽  
V. S. Havrylenko ◽  
◽  
...  
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Spent Nuclear Fuel ◽  
Radiation Safety ◽  
Scientific Information ◽  
Research Work ◽  
The State ◽  
Nuclear And Radiation Safety ◽  
Medical Examinations

Main results of scientific and scientific-organizational activity of the Institute for Safety Problems of Nuclear Power Plants of Ukraine in 2019 are given, among them research and scientific information work, use of researches results in the economy, cooperation with national and international institutions, training of the scientific personnel, participation of young scientists in the international cooperation, knowledge and experience transfer, promotion of research achievements, coverage of scientific and research works in mass media, research and expert works for the benefit and on demand of the public authorities as well as publication of scientific results. It was shown that important results both in the study of the state of nuclear and radiation safety of the Shelter object and in works focused on the improvement of the reliability, effectiveness and operation safety of working Ukrainian nuclear power plants were received by specialists of the Institute. According to the specifics of the Institute’s activities, research work is carried out at nuclear and radiation-hazardous facilities. Therefore, special requirements are set for equipment, facilities and staffing, namely: the need to obtain licenses from the SNRC of Ukraine, a certified quality system, certified laboratories of the appropriate class of radiation hazard, mandatory medical examinations, testing of knowledge of nuclear and radiation safety, etc. The location of the laboratory base in Chornobyl, the need to perform work in radiationhazardous conditions and perform radiation control are the reasons for significant financial costs for transportation services, medical examinations, obtaining the necessary licenses, providing overalls and personal protective equipment. Despite the low level of financing caused by economic crisis in the state the institution does everything possible for maintaining its scientific and technical potential and has strategic aim — to become leading institution of Ukraine which render scientific-technical, engineering, methodical and information services in the sphere of safe operation of facilities with nuclear technologies, elimination of radiation accidents consequences, nuclear facilities decommissioning, radioactive waste and spent nuclear fuel treatment and transformation of the Shelter object into an ecologically safe system.

Regulation of the spent nuclear fuel management at the andreeva bay site for temporary storage on the kola peninsula

2017 ◽  
Vol 62 (4) ◽  
pp. 12-16 ◽  
Author(s):  
В. Уйба ◽  
V. Uyba ◽  
М. Сневе ◽  
M. Sneve ◽  
А. Самойлов ◽  
...  
Keyword(s):  
Kola Peninsula ◽  
Radiation Protection ◽  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Radiation Safety ◽  
Threat Assessment ◽  
Potential Hazard ◽  
Temporary Storage ◽  
Dose Monitoring ◽  
Population And Environment

Purpose: To share the experience in regulation of radiation safety and protection of workers involved in management of the spent nuclear fuel (SNF) and radioactive waste (RW), as well as radiation protection of the population and environment in the vicinity of sites for temporary storage at Andreeva Bay on the Kola Peninsula. Material and methods: Spent fuel from Russian nuclear powered submarines has been stored at shore based facilities for more than 20 years, notably at Andreeva Bay. The storage facilities were for some years poorly maintained and a significant fraction of the fuel that is still in store at the site wais damaged. Over the last years, hugemuch work has been done to improve the technical infrastructure and prepare for removal of the SNF from the temporary stores, management of existing RW. Results: This paper presents progress with projects of the FMBA of Russia and NRPA cooperation for regulation of radiation safety and protection. During the researches, the following issues were addressed: radiological threat assessment to identify the priority directions of regulation; detailed analysis of the radiation situation on sites, at the territories and nearby the sites; radiation control and monitoring of the environmental conditions; development of the computer maps and geo-information system; emergency preparedness and response; improvement of radiation safety culture; etc. Based on the received results of monitoring and assessment of the current risks, site-specific regulatory documents have been developed for the bodies and institutions under the FMBA of Russia involved in the activities to control the facility. Those documents include the requirements for: radiation protection of workers and population; personal dose monitoring; the RW management including the very low level RW; implementation of the environmental monitoring; radiation monitoring nearby the Andreeva Bay SevRAO facility; and remediation of the sites as remediation criteria and regulations. The next stage of work is to carry out the regulation of large-scale removal of SNF during 2017–2021 and its subsequent transfer to Mayak PA, and operations to bring the infrastructure of the site into the hsafe conditions, i.e., ecological remediation of the site – by 2025. Lessons learnt from this work are being used in support of improved international recommendations and guidance on how to address legacy issues. Conclusion: The experience accumulated during regulation of the remediation process of the former Naval Coastal Technical Bases, has helped to identify new relevant areas of improvement of the regulatory supervision at nuclear legacy sites. The study of potential hazard of radiation exposure to the personnel during technological operations of SNF and RW management is very important issue. In this light, the regulator in cooperation of the operator should develop some effective and efficient activities for dose monitoring. When dealing with the protection of the population and environment, a methodology of comprehensive radiation and chemical monitoring should be developed and models of radiation and chemical risks should be improved taking into account features of contamination of the site under remediation. An important link of the social focus of the regulator and the operator is to improve strategies of public communications near legacy sites under remediation.

Statics and Dynamics of Elastic Shells with Cutouts —A Review

1974 ◽  
Vol 18 (02) ◽  
pp. 113-126
Author(s):  
J. Pattabiraman ◽  
V. Ramamurti ◽  
D. V. Reddy
Keyword(s):  
Dynamic Loading ◽  
Nuclear Reactors ◽  
High Reliability ◽  
Pressure Vessels ◽  
Experimental Investigations ◽  
Concentrated Loads ◽  
Stress Concentrations ◽  
Elastic Shells ◽  
Statics And Dynamics ◽  
Static And Dynamic Loading

The purpose of this survey is to give a review of the methods and results of analytical and experimental investigations for stress concentrations in thin elastic shells subjected to static and dynamic loading. The increasing use of higher-strength materials in the design of pressure vessels, aircraft, ships, and nuclear reactors with high reliability necessitates more precise analyses in the regions of cutouts and concentrated loads.

Radiation safety of spent nuclear fuel

Atomic Energy ◽  
1998 ◽  
Vol 84 (1) ◽  
pp. 33-40 ◽  
Author(s):  
N. N. Ponomarev-Stepnoi ◽  
A. G. Morozov ◽  
V. V. Kuznetsov ◽  
V. V. Kevrolev
Keyword(s):  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Radiation Safety

scholarly journals To 25-th Anniversary of SSTC NRS Kharkiv Subsidiary

2018 ◽  
pp. 65-70
Author(s):  
M. Yastrebenetskyi
Keyword(s):  
Reliability Analysis ◽  
Radiation Safety ◽  
The State ◽  
State Enterprise ◽  
History Of ◽  
Nuclear And Radiation Safety

The Kharkiv Subsidiary of the State Enterprise “Scientific and Technical Center for Nuclear and Radiation Safety” (SSTC NRS) started its history on 12 April 1993 with the establishment of the NPP I&C Reliability Analysis Department in Kharkiv within the back then Scientific and Technical Center for Nuclear and Radiation Safety (STC NRS). The author of the paper tells about the history of the Kharkiv Subsidiary, areas of activities, obtained results and prospects for the development.

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