The application of graded approach in the nuscale SMR design.

As of March 2022, NuScale has published the 5th revision of all safety analysis reports that have been evaluated by the USNRC in the final safety evaluation report, which states that the NuScale design has met all safety requirements. With this development, NuScale will likely to be the first small modular reactor to receive a design certificate from the USNRC. Meanwhile, a study has explored the prospect of developing NuScale technology in Indonesia, which applies the regulatory system based on large-power light water reactors as also a common practice in many countries. Thus, the problem raised by this paper was how NuScale implemented graded approach to meet all the regulatory requirements? This question is very important considering the possibility of NuScle technology deployement in Indonesia and the fact that international standards for applying a graded approach to a nuclear power plant are not yet available. Hence, This paper aims to examine the application of the graded approach to NuScale technology. The method applied in this study was descriptive, analytical, and qualitative, utilized secondary data from credible international references, and carried out in four steps. The study started with the identification of relevant references and then selected one of them as the main reference while the other can be used for comparison. The level of coverage completeness and detail of instruction were used as the selection criteria of the identified documents The selected main reference was then studied to identify graded approach fields of application. Finally, the study also assesses how NuScale has implemented graded approach in those fields. This study concluded that NEI 18-04 document, as the selected main reference, is a comprehensive and detailed guide, and thus can be used as a reference to implement the graded approach in the three application fields, i.e.: selection of licensing basis events; classification of structures, systems and components; and evaluation of the adequacy of defense-in-depth. Furthermore, NuScale in their licensing document has demonstrated graded approach in the three fields of application with a method that is comparable to those described in the NEI 18-04. [ABSTRACT FROM AUTHOR]