United States Nuclear Regulatory Commission (U.S. NRC) specifies regulations on obtaining licenses and describes the technical position on the average waste concentration, also known as Concentration Averaging and Encapsulation Branch Technical Position (CA BTP); CA BTP helps classify blendable waste and discrete items and address concentration averaging. The technical position details are reviewed and compared in a real environment in Korea. A few cases of concentration averaging based on the application of CA BTP to domestic radioactive waste are presented, and the feasibility of the application is assessed. The radioactive waste considered herein does not satisfy the Disposal Concentration Limit (DCL) of the second-phase disposal facility while applying the preliminary classification. However, if CA BTP is applied when the radioactive waste is mixed with other radioactive waste items in a large and heavy container, it can be disposed of at the second-phase disposal facility in Gyeongju Repository. To apply the CA BTP of the U.S. NRC, it is necessary to investigate the safety assessment conditions of the US and Korea.

1. Introduction
2. Background
    2.1 Comparison of Classification for LILW
    2.2 Comparison of Post Closure ManagementPeriod
3. Methodology
    3.1 Purpose of Applying CA BTP
    3.2 Blendable Waste of CA BTP
    3.3 Discrete Items of CA BTP
4. Application of CA BTP Based onImplementation Guidance of EPRI
    4.1 Blendable Waste
    4.2 Discrete Items
5. Application of CA BTP Based on ActualRadwaste and Disposal ConcentrationLimit in Korea
    5.1 Status of Disposal Environment in Korea
    5.2 Application CA for Korea
6. Conclusion
7. Further Review
Conflict of Interest
Acknowledgements

• Jiyoung Yi(KEPCO International Nuclear Graduate School, 658-91, Haemaji-ro, Seosaeng-myeon, Ulju-gun, Ulsan 45014, Republic of Korea)
• Chang-Lak Kim(KEPCO International Nuclear Graduate School, 658-91, Haemaji-ro, Seosaeng-myeon, Ulju-gun, Ulsan 45014, Republic of Korea) Corresponding Author