Altitude-Dependent Distribution of Ambient Gamma Dose Rates in a Mountainous Area of Japan Caused by the Fukushima Nuclear Accident

2015 ◽  
Vol 49 (6) ◽  
pp. 3341-3348 ◽  
Author(s):  
Mutsuo Hososhima ◽  
Naoki Kaneyasu
Keyword(s):  
Gamma Dose ◽  
Nuclear Accident ◽  
Fukushima Nuclear Accident ◽  
Mountainous Area ◽  
Dose Rates ◽  
Gamma Dose Rates

Release rate estimation of both long- and short-lived radionuclides for the Fukushima Daiichi nuclear accident based on local-scale observations

2020 ◽  
Author(s):  
Sheng Fang ◽  
Xinpeng Li ◽  
Shuhan Zhuang
Keyword(s):  
Release Rate ◽  
Source Term ◽  
A Priori ◽  
Regional Scale ◽  
Local Scale ◽  
Gamma Dose ◽  
Nuclear Accident ◽  
Dose Rates ◽  
Gamma Dose Rates ◽  
Fukushima Daiichi

<p>Many efforts have been devoted to estimate the release rate of the radionuclide emission in the Fukushima Daiichi nuclear accident using regional scale observations. Because of the radioactive decay, regional scale observations may not provide information of short-lived radionuclides, which contributes the majority of radiation exposure in the early stage. In this study, the local-scale gamma dose rates data were used to estimate the atmospheric release rates of both long- and short-lived radio nuclides.The proposed method uses reactor physics to obtain an a priori radionuclide composition and a reverse source term estimate as an a priori release rate. A weighted additive model is developed, which uses the local-scale gamma dose rates to handle the conflicts between the two priors and to simultaneously incorporate them into the source inversion. The proposed method is validated against both the local-scale gamma dose rates and the regional concentration measurements of Cs-137. The results prove that the retrieved a posteriori source term combines the advantages of both priors and substantially improves the predictions of the on-site gamma dose rates. Given a detailed priori release rate, this approach also improves the regional predictions of both airborne and deposited Cs-137 concentrations.</p>

scholarly journals Temporal changes in gamma dose rates in the Esk Estuary, UK

2011 ◽  
Vol 46 (6) ◽  
pp. S301-S307 ◽  
Author(s):  
M.D. Wood ◽  
D. Copplestone
Keyword(s):  
Temporal Changes ◽  
Gamma Dose ◽  
Dose Rates ◽  
Gamma Dose Rates

Assessment of gamma dose rates from terrestrial exposure in Serbia and Montenegro

2006 ◽  
Vol 121 (3) ◽  
pp. 297-302 ◽  
Author(s):  
S. Dragović ◽  
Lj. Janković ◽  
A. Onjia
Keyword(s):  
Gamma Dose ◽  
Serbia And Montenegro ◽  
Dose Rates ◽  
Gamma Dose Rates

scholarly journals Assessment of radiological risk in the area around surface disposal at Al -Tuwaitha site

2019 ◽  
Vol 14 (30) ◽  
pp. 90-97
Author(s):  
Asia H. Al-Mashhadani
Keyword(s):  
Health Risk ◽  
Hpge Detector ◽  
Specific Activity ◽  
Gamma Dose ◽  
Dose Equivalent ◽  
Radiological Risk ◽  
Dose Rates ◽  
Gamma Dose Rates ◽  
Specific Activities

The gamma dose rates and specific activity of 137Cs, 60Co and 40K insamples of soil taken from places near the landfill radiation at Al-Tuwaitha site were measured using a portable NaI(Tl) detector. Theresults of gamma dose rates in samples were ranged from 52.6nGy.h-1 to 131nGy.h-1. Then the specific activity of 137Cs, 60Co and40K in soil were determined using high pure germanium (HPGe)detector. The specific activities were varied from 1.9 to 115500 Bq.kg-1 for 137Cs, from 6.37 to 616.5 Bq. kg-1 for 60Co, and from 3 to839.5 Bq. kg-1 for 40K. The corresponding health risk for the annualeffective dose equivalent varied from 1.85×10-14 to 15.7mSv/y. Theresults were compared with various international recommendations.

Measurement of the Background Gamma Dose Rates in Houston, Texas

2018 ◽  
Vol 115 (6) ◽  
pp. 787-790 ◽  
Author(s):  
Anastasia M. Ozain-Porterie ◽  
Tommy Quach ◽  
Mark C. Harvey
Keyword(s):  
Gamma Dose ◽  
Dose Rates ◽  
Gamma Dose Rates
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