title: Effect of Remediation Parameters on in-Air Ambient Dose Equivalent Rates When Remediating Open Sites with Radiocesium-contaminated Soil.
abstract: Calculations are reported for ambient dose equivalent rates [H˙*(10)] at 1 m height above the ground surface before and after remediating radiocesium-contaminated soil at wide and open sites. The results establish how the change in H˙*(10) upon remediation depends on the initial depth distribution of radiocesium within the ground, on the size of the remediated area, and on the mass per unit area of remediated soil. The remediation strategies considered were topsoil removal (with and without recovering with a clean soil layer), interchanging a topsoil layer with a subsoil layer, and in situ mixing of the topsoil. The results show the ratio of the radiocesium components of H˙*(10) post-remediation relative to their initial values (residual dose factors). It is possible to use the residual dose factors to gauge absolute changes in H˙*(10) upon remediation. The dependency of the residual dose factors on the number of years elapsed after fallout deposition is analyzed when remediation parameters remain fixed and radiocesium undergoes typical downward migration within the soil column.
authors: *Center for Computational Science & e-Systems, Japan Atomic Energy Agency, University of Tokyo Kashiwanoha Campus Satellite, 178-4-4 Wakashiba, Kashiwa-shi, Chiba 277-0871, Japan; †Sector of Fukushima Research and Development, Japan Atomic Energy Agency, 10-2 Fukasaku, Miharu-machi, Tamura-gun, Fukushima 963-7700, Japan.
authors: Alex
authors: A
authors: Malins
authors: Hiroshi
authors: H
authors: Kurikami
authors: Akihiro
authors: A
authors: Kitamura
authors: Masahiko
authors: M
authors: Machida
mesh_terms: D000396:Air Pollutants, Radioactive; D002588:Cesium Radioisotopes / Q000032:analysis* / Q000302:isolation & purification*; D003666:Decontamination / Q000379:methods*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012990:Soil Pollutants, Radioactive / Q000032:analysis / Q000302:isolation & purification*
chemical_list: D000396:Air Pollutants, Radioactive; D002588:Cesium Radioisotopes; D012990:Soil Pollutants, Radioactive