Current issues of review of computer codes used for safety analysis of nuclear facilities

Current issues of review of computer codes used for safety analysis of nuclear facilities.

Bogdan S. N., Zhylmaganbetov N. M., Kozlova N. A., Ponizov A. V., Sharafutdinov R. B., Shevchenko R. A., Shevchenko S. A., Yashnikov D. A.

May 2021 marks the 30th anniversary of activities on review of computer codes intended for use in safety analysis of nuclear facilities in Russia. Since 2018 the Federal Law "On the Use of Atomic Energy" requires to use for safety analysis only computer codes reviewed in technical support organization of Rostechnadzor. The article summarizes experience of SEC NRS in this review process. Changes in the regulatory documents governing the review procedure and establishing requirements and recommendations for justification of computer code applicability are described. The results of the most significant computer code reviews are discussed in relation to innovative nuclear facilities. The article also discusses the topical issues of development of the methodological basis of computer code review. In addition, applied by SEC NRS approaches to the use of numerical simulation of processes affecting the safety of nuclear facilities for the purpose of scientific and technical support of safety regulation in the use of atomic energy are discussed.
Keywords: computer code review, safety analysis, verification, validation.

Article language: Russian. Pp. 32–49. DOI: 10.26277/SECNRS.2022.104.2.002.