Mixed ~3H and Br~- Migration Experiment in Aquifer Medium

Mixed 3H and Br- migration experiment in the experimental shaft of the CIRP's field test site was carried out. Two different experimental devices were designed. Tracers and disturbed soil collected from the aquifer were filled in the horizontal experimental devices, and the natural underground water flowed into the device from their front end. Water samples from effluent and sampling point in four crosssections were collected or sucked. The migration velocities of tracers were obtained by measurement of 3H and Br- in water samples. All Br- migration velocities are larger than ones of 3H under the same condition. This is perhaps as a result of anion exclusion effect. The ratio of migration velocity of 3H and Br- is in the range of 0.78～0.94. The migration velocities of 3H or Br- at different distances and radial positions are same for point source or plane source. It can be found that ratio of migration velocity of 3H and Br- decreases with distance from peak or mass center. 