[1M08-11] High-level Radioactive Waste 1

2:45 PM - 3:00 PM JST(5:45 AM - 6:00 AM UTC)

[1M08] Parameter Optimization of the Solute Transport Equations from In Situ Tracer Test of the Excavation Damaged Zone

*Koraphat Fairat¹, Masaki Takeda¹, Yusuke Ozaki¹ (1. JAEA)

Keywords:

Geological disposal,Excavation damaged zones (EDZs),Solute transport,Parameter optimization

Excavation damaged zones (EDZs) formed around a tunnel may allow nuclides to migrate along the pathways. The characteristics of solute transport in fracture and rock matrix inside EDZs were investigated by in situ tracer test. The parameters of solute transport equations were optimized to satisfy the measured breakthrough curve (BTC) and estimate the advective and dispersive effect along with the diffusional transfer. The result shows that most tracers likely move along the fracture and do not diffuse into the matrix under the in situ experimental condition.