PREPRINTS

Preprint IBRAE-2022-01

Yu. E. Vaneyev

The results of build-up factors calculations in the tasks with point and flat isotropic gamma radiation sources in the infinite medium of iron using the precision code TDMCC are presented. The ranges of energy and optical thickness values are detected where relative deviations of calculated and referenced build-up factors are within ± 1%. Outside those ranges, sufficient understating of calculated build-up factors values (up to 90%) is found, connected to differences in gamma radiation interaction constants when getting referenced data and calculations by TDMCC code. The relations for correct comparison of calculated build-up factors with referenced data are recommended during a verification of code for gamma radiation shield parameters calculation.

Bibliographical reference

Vaneyev Yu. E. Results of the Build-up Factors Calculations using the precision code for the Infinite Medium Compared to Referenced Data. Preprint IBRAE-2022-01. — Moscow : Nuclear Safety Institute, 2022. — 13 p. — Bibliogr.: 19 items. — ISBN 978-5-6041296-9-2.

©Nuclear Safety Institute, 2022

Preprint IBRAE-2020-04

S. A. Bogatov, D. V. Kryuchkov 

The placement of Class 1 radioactive waste in crystalline rocks in carbon steel containers surrounded by a bentonite buffer is considered as one of the possible concepts in the design of the Russian deep disposal site for radioactive waste (PGZRO). Several fundamental issues of this concept are considered - determination of the minimum thickness of a carbon steel container according to the criteria of mechanical strength, taking into account the effect of a bentonite buffer and corrosion. Preliminary computational estimates of the thickness of the bentonite buffer were carried out according to the criterion of the minimum required swelling pressure.  

Bibliographical reference

Bogatov S. A., Kryuchkov D. V. Estimation of the minimum shell thickness of a steel container for disposal of class 1 radioactive waste in crystalline rocks with a bentonite buffer. Preprint IBRAE-2020-04. — Moscow : Nuclear Safety Institute, 2020. — 29 p. — Bibliogr.: 45 items. — ISBN 978-5-6041296-9-2.

© IBRAE, 2020

Preprint IBRAE-2020-03

M. V. Vedernikova, I. I. Linge, S. V. Panchenko, S. V. Strizhova, O. A. Supotaeva, S. S. Utkin 

The paper describes the reasoning behind the adoption, as well as subsequent regulatory application of the Federal Law of January 9, 1996 No.3-FZ “On radiation safety of population”. Analysis is provided for in-force edition of the Law and for the prospects of its future application and development. Two possible options are considered. The first and the preferable option is to revoke the document due to its very low regulatory effect. The second option (in the case the first option would not be acceptable) is to develop amendments and modifications for the Law.
Special attention is paid to analysis of proposals on amending specific articles of the law (in accordance with the draft law “On introduction of amendments to the Federal Law of January 9, 1996 No.3-FZ “On radiation safety of population”, which was published on the Federal portal of the draft regulatory acts regulation.gov.ru for the purpose of public discussion, ID 02/04/05-20/00101773).
The final section describes the optimal contents of the amended law in the case the second option is taken.  

Bibliographical reference

Vedernikova M. V., Linge I. I., Panchenko S. V., Strizhova S. V., Supotaeva O. A., Utkin S. S.On the issue of amendments to the Federal Law of January 9, 1996 No.3-FZ “On radiation safety of population”. — (Preprint / Nuclear Safety Institute RAS, № IBRAE-2020-03). — Moscow: Nuclear Safety Institute RAS, 2020. — 22 p. — Bibliogr.: 20 items. . — ISBN 978-5-6041296-5-4.

© IBRAE, 2020

Preprint IBRAE-2020-02

I. L. Abalkina, S. V. Panchenko 

The paper describes the main principles for development and use of conceptual site model (CSM), which is widely recognized as a tool for remediation decision making. Based on the analysis of various guidelines, the paper considers CSM goals, evolution, information requirements, application in remediation process.
The practical use of this tool is demonstrated in relation to the area adjacent to the Kirov-Chepetsk Chemical Combine. Radiation dose calculations for the two land use scenarios are presented. The paper also discusses the potential of CSM application in support of activities at nuclear legacy sites.
This publication is addressed to abroad audience of technical and social science experts who deal with nuclear legacy issues and past environmental liabilities.  

Bibliographical reference

Abalkina I. L., Panchenko S. V. Conceptual Site Model as an Example of Best Practices in Remediation. — (Preprint / Nuclear Safety Institute RAS, № IBRAE-2020-02). — Moscow: Nuclear Safety Institute RAS, 2020. — 49 p. — Bibliogr.: 74 items. — ISBN 978-5-6041296-7-8.

© Nuclear Safety Institute, 2020

Preprint IBRAE-2020-01

D. V. Aron, Е. А. Ilyichev, V. P. Merkushov, I. I. Linge, Е. М. Melikhova, S. V. Panchenko, А. М. Shvedov, А. V. Shikin

The paper presents the results of the analysis of the existing radiation situation and projection for the case of the construction of a section of the Southeast Chord near the borders of the Moscow Polymetal Plant. The environmental conflict that arose in 2019 is considered from the standpoint of radiation safety and risk communication. In addition to purely scientific results, the preprint provides a general description of the radiation situation in the city, the basic principles for ensuring radiation protection of the population in case of detection of radiation anomalies, and briefly describes the city’s radiation safety provision system. The paper is supplemented with links allowing a better understanding of the scale of radiation risks, and they are negligible in comparison with other technological risks that accompany the life of Muscovites. The publication is designed for a wide range of readers - from narrow specialists to public figures and environmental activists.  

Bibliographical reference

Aron, D. Radioactive contamination of the ground at the construction site of the Southeast Chord: assessment and projections of radiation safety of the population / D. V. Aron, Е. А. Ilyichev, V. P. Merkushov, I. I. Linge, Е. М. Melikhova, S. V. Panchenko, А. М. Shvedov, А. V. Shikin — (Preprint / Nuclear Safety Institute RAS, April 2020, № IBRAE-2020-01). — Moscow: NSI RAS, 2020. — 44 p. — Bibliogr.: 120 items  — ISBN 978-5-6041296-3-0

Preprint IBRAE-2019-03

I.L. Abalkina, L.A. Bolshov, I.I. Linge, S.S. Utkin, E.A. Saveleva, V.S. Svitelman, I.V. Kapyrin

This paper considers the main aspects of the safety case methodology for deep geological disposal of radioactive waste and spent nuclear fuel. The paper shows that the required predictive capability associated foremost with the large timeframes is at least does not exceed similar requirements for safety analysis of reactor facilities. The main focus is the analysis of the list of significant for deep geological disposal Features, Events, Processes, development of the relevant evolution scenarios based on this list and corresponding computation tools for their assessment. The associated knowledge management issues are also touched upon.

The material takes into account the best international practices and could benefit a wide range of experts in the area of nuclear fuel cycle long-term safety analysis. 

Bibliographical reference

Abalkina I. L., Bolshov L. A., Kapyrin I. V., Linge I. I., Saveleva E. A., Svitelman V. S., Utkin S. S. Radioactive Waste and Spent Nuclear Fuel Deep Geological Disposal Long-Term Safety Assessment for 10 000 Years and Over: Methodology and The Current State. Preprint IBRAE-2019-03 — Moscow: Nuclear Safety Institute, 2019 — 40 p. — Bibliogr: 84 items.

Preprint IBRAE-2019-02

This volume contains reports presented at the Twentieth Conference of NSI RAS Young Scientists, held September 12—13, 2019. The authors are students, postgraduate students and young specialists learning and working at the Nuclear Safety Institute as well as participants from other institutes working in adjacent directions. The presented reports cover the most part of scientific activity aspects of the Institute. They are devoted to the problem of severe accidents at NPP, ecological problems, numerical modeling methods, probabilistic safety analysis, information technologies, and economics of energy industry.  

Bibliographical reference

Proceedings of the Twentieth Scientific School of NSI RAS Young Scientists, held September 12—13, 2019. – (Preprint / Nuclear Safety Institute RAS, September 2019, № IBRAE-2019-02). – Moscow: NSI RAS, 2019 – 168 р. – ISBN 978-5-9907220-1-9.

© Nuclear Safety Institute, 2019

Preprint IBRAE-2019-01

Mitenkova, E.F., Solovjeva E.V.

This paper presents the ORIGEN2 code features when solving the nuclide kinetics problems using all fission products with independent yields. It is shown the impossibility to obtain the reliable solutions with the guaranteed accuracy for all calculated nuclides by ORIGEN2 code. The calculation results using MZK program to solve stiff ODE systems, based on SADEL solvers library (Bauman Moscow State Technical University), are presented. The MZK program is adapted to solve the nuclide kinetics problems, providing reliable solutions with guaranteed accuracy for all calculated nuclides. 

Bibliographical reference

E.F. Mitenkova, E.V. Solovjeva. Computational restrictions of ORIGEN2 code in solving the nuclide kinetics problems / Preprint IBRAE-2019-01. — Moscow: NSI RAS, 2019. — 31 p. — Bibliogr.: 15 items. 

© Nuclear Safety Institute, 2019

Preprint IBRAE-2018-15 

Boldyrev K.A., et al. 

The principles and the concept of creating a complex that combines calculation and forecasting tools for analyzing migration of radionuclides outside the facility, taking into account the evolution of security barriers is presented. The description of the processes evolution of engineering safety barriers and the structure of the computational and forecasting complex, taking into account the interacting physical and chemical processes are given. 

Bibliographical reference

K.A. Boldyrev, D.V. Kryuchkov, V.D. Kovalchuk, K.V. Martinov. Application methods of the principles of integrated accounting of the evolution of engineering safety barriers in the assessment of the release radionuclides from the object / Preprint IBRAE-2018-15. — Moscow: NSI RAS, 2018. — 27 p. — Bibliogr.: 22 items. 

© Nuclear Safety Institute, 2018

Preprint IBRAE-2018-14 

Aksenova A.E., et al. 

The paper presents the Visualizator software that allows you to perform checking of the results of the calculations of CFD module CONV-3D. The document presents a graphical user interface (GUI) and computing features of the program computing experiments results, including visualization of the package that includes. Visualizator is a component of CFD module CONV-3D/V2 built for purposes of analysis of NPP safety. 

Bibliographical reference

A.E. Aksenova, A.A. Korotkov, V.A. Pervichko, V.V. Chudanov. Visualizator for CFD computing module CONV-3D. Graphic post-processing software / Preprint № IBRAE-2018-14. Moscow: Nuclear Safety Institute, 2018. – 46 p. – Bibliography: 9 references. – 100 copies. 

© Nuclear Safety Institute, 2018