Abstract: For radioactive waste containing multiple nuclides with differentt guideline values of specific activities, radioactive soil standard samples prepared with ¹³⁷Cs and ⁹⁰Sr as representative nuclides are utilized to determine measurement and segregation guideline values. This paper introduces the followings: methodological principles, implementation procedures, validation criteria, and practical applications.

Key words: soil standard samples containing ¹³⁷Cs / ⁹⁰Sr dual-nuclides, the segregation guideline values, specific activity