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Radionuclide transfer onto ground surface in surface water flow. 2. Undisturbed tuff rock

Technical Report:

Abstract

Radionuclide migration with ground surface water flow is considered to be one of path ways in the scenario for environmental migration of the radionuclide leaked from LLRW depository. To study the radionuclide migration demonstratively, a ground surface radionuclide migration test was carried out by simulating radioactive solution flowing on the sloped tuff rock surface. Tuff rock sample of 240 cm in length taken from the Shimokita district was used to test the transfer of {sup 60}Co, {sup 85}Sr and {sup 137}Cs onto the sample surface from the flowing radioactive solution under restricted infiltration condition at flow rates of 25, 80, 160ml/min and duration of 56h. The concentration change of the radionuclides in effluent was nearly constant as a function of elapsed time during the experimental period, but decreased with lower flow rates. Among the three radionuclides, {sup 137}Cs was greatly decreased its concentration to 30% of the inflow. Adsorbed distribution of the radionuclides concentration on the ground surface decreased gradually with the distance from the inlet, and showed greater gradient at lower flow rate. Analyzing the result by the migration model, where a vertical advection distribution and two-dimensional diffusion in surface water are adopted with a first order adsorption reaction,  More>>
Authors:
Mukai, Masayuki; Takebe, Shinichi; Komiya, Tomokazu [1] 
  1. Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment
Publication Date:
Sep 01, 1994
Product Type:
Technical Report
Report Number:
JAERI-Research-94-014
Reference Number:
SCA: 540230; PA: JPN-94:012175; EDB-95:024754; SN: 95001319983
Resource Relation:
Other Information: PBD: Sep 1994
Subject:
54 ENVIRONMENTAL SCIENCES; LOW-LEVEL RADIOACTIVE WASTES; RADIONUCLIDE MIGRATION; SURFACE WATERS; ADSORPTION; DIFFUSION; TUFF; MATHEMATICAL MODELS; COBALT 60; STRONTIUM 85; CESIUM 137; SIMULATION; FLOW RATE; 540230; RADIOACTIVE MATERIALS MONITORING AND TRANSPORT
OSTI ID:
10109303
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE95737267; TRN: JP9412175
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
32 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Mukai, Masayuki, Takebe, Shinichi, and Komiya, Tomokazu. Radionuclide transfer onto ground surface in surface water flow. 2. Undisturbed tuff rock. Japan: N. p., 1994. Web.
Mukai, Masayuki, Takebe, Shinichi, & Komiya, Tomokazu. Radionuclide transfer onto ground surface in surface water flow. 2. Undisturbed tuff rock. Japan.
Mukai, Masayuki, Takebe, Shinichi, and Komiya, Tomokazu. 1994. "Radionuclide transfer onto ground surface in surface water flow. 2. Undisturbed tuff rock." Japan.
@misc{etde_10109303,
title = {Radionuclide transfer onto ground surface in surface water flow. 2. Undisturbed tuff rock}
author = {Mukai, Masayuki, Takebe, Shinichi, and Komiya, Tomokazu}
abstractNote = {Radionuclide migration with ground surface water flow is considered to be one of path ways in the scenario for environmental migration of the radionuclide leaked from LLRW depository. To study the radionuclide migration demonstratively, a ground surface radionuclide migration test was carried out by simulating radioactive solution flowing on the sloped tuff rock surface. Tuff rock sample of 240 cm in length taken from the Shimokita district was used to test the transfer of {sup 60}Co, {sup 85}Sr and {sup 137}Cs onto the sample surface from the flowing radioactive solution under restricted infiltration condition at flow rates of 25, 80, 160ml/min and duration of 56h. The concentration change of the radionuclides in effluent was nearly constant as a function of elapsed time during the experimental period, but decreased with lower flow rates. Among the three radionuclides, {sup 137}Cs was greatly decreased its concentration to 30% of the inflow. Adsorbed distribution of the radionuclides concentration on the ground surface decreased gradually with the distance from the inlet, and showed greater gradient at lower flow rate. Analyzing the result by the migration model, where a vertical advection distribution and two-dimensional diffusion in surface water are adopted with a first order adsorption reaction, value of migration parameters was obtained relating to the radionuclide adsorption and the surface water flow, and the measured distribution could be well simulated by adopting the value to the model. By comparing the values with the case of loamy soil layer, all values of the migration parameters showed not so great difference between two samples for {sup 60}Co and {sup 85}Sr. For {sup 137}Cs, reflecting a few larger value of adsorption to the tuff rock, larger ability to reduce the concentration of flowing radioactive solution could be indicated than that to the loamy soil surface by estimation for long flowed distance. (author).}
place = {Japan}
year = {1994}
month = {Sep}
}