With the significant increase in spent ion-exchange resin generation, to meet the requirements of Waste Acceptance Criteria (WAC) of the Wolsong disposal facility in Korea, blending is considered as a method for enhancing disposal options for intermediate level waste from nuclear reactors. A mass balance formula approach was used to enable blending process with an appropriate mixing ratio. As a result, it is estimated around 44.3% of high activity spent resins can be blended with the overall volume of low activity spent resins at a 1:7.18 conservative blending ratio. In contrast, the reduction of high activity spent resins is considered a positive solution in reducing the amount of spent resins stored. In an economic study, the blending process has been proven to lower the disposal cost by 10% compared to current APR1400 treatment. Prior to commencing use of this blending method in Korea, coordinated discussion, and safety and health assessment should be undertaken to investigate the feasibility of fitting this blending method to national policy as a means of waste predisposal processing and management in the future.

1. Introduction
 2. Spent Resins (SR) Waste in Korea
  2.1 Status of spent resins treatment method
  2.2 Estimated spent resins inventory for Shin-Kori 3 & 4
 3. Methodology
  3.1 General operational concept of blending
  3.2 Requirement Analysis
  3.4 Blending method options description
  3.5 Performance requirements
 4. Results and Discussion
  4.1 Effects of Blending Method
  4.2 Waste Management Cost
  4.3 Considerations
   4.3.1 National policy
   4.3.2 Waste package for final disposal
   4.3.3 Long-term stability prior to disposal
   4.3.4 Performance assessment at disposal site
   4.3.5 Health and safety requirement
 5. Conclusion
 Acknowledgment
 REFERENCES

• Nursaidatul Syafadillah Kamaruzaman(KEPCO International Nuclear Graduate School)
• David S. Kessel(KEPCO International Nuclear Graduate School)
• Chang-Lak Kim(KEPCO International Nuclear Graduate School) Corresponding Author