Safety justification methodology for aqueous homogeneous reactor vessel replacement

Safety justification methodology for aqueous homogeneous reactor vessel replacement.

Boykova T. V., Kochnov Yu. O., Petrunin N. V., Safronova N. N., Tutnov I. A.

The majority of pulse aqueous homogeneous reactors have reached the end of their design life and require either replacement or a major overhaul. To extend the service life, it is necessary to carry out a set of measures to substantiate the remaining service life of reactor systems. The article describes a special case of life extension by means of remedial repair. The principles, scientific position and methodology for justifying the safety of repair for pulse aqueous homogeneous reactor are presented. To assess the safety of the replacing vessel process for a nuclear reactor, the type of the information model is presented in the form of an Ishikawa diagram. As verification of the methodology the examples of formation of separate elements of working programs of restorative repair of research pulse aqueous homogeneous reactor are given taking into account the measurement information on the results of operational monitoring of its technical condition for the period of long-term operation. The list of the main factors to be taken into account in preparation for nuclear and radiation hazardous work in the general format of the methodology based on the principles of nuclear and radiation safety is defined.

► Keywords: research pulse reactor, pulse aqueous homogeneous reactor, extension of residual life, verification of methodology, nuclear and radiation hazardous work, safety principles, replacement of the reactor vessel.

Article language: Russian. Pp. 36–47. [in Russian]. DOI: 10.26277/SECNRS.2024.111.1.003.