An Aerial Radiological Survey of the Portsmouth Gaseous Diffusion Plant and Surrounding Area, Portsmouth, Ohio

Namdoo Moon

关键词: BISMUTH 214;    GROUND LEVEL;    HELICOPTERS;    NAI DETECTORS;    OHIO;    PORTSMOUTH GASEOUS DIFFUSION PLANT;    RADIOISOTOPES;    RADIUM 226 Aerial Measurement System;    Survey;    Portsmouth Gaseous Diffusion Plant;   

DOI  :  10.2172/934776
RP-ID  :  DOE/NV/25946--335
PID  :  OSTI ID: 934776
Others  :  TRN: US0804141

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

An aerial radiological survey was conducted over the 16 square-mile (~41 square-kilometer) area surrounding the Portsmouth Gaseous Diffusion Plant. The survey was performed in August 2007 utilizing a large array of helicopter mounted sodium iodide detectors. The purpose of the survey was to update the previous radiological survey levels of the environment and surrounding areas of the plant. A search for a missing radium-226 source was also performed. Implied exposure rates, man-made activity, and excess bismuth-214 activity, as calculated from the aerial data are presented in the form of isopleth maps superimposed on imagery of the surveyed area. Ground level and implied aerial exposure rates for nine specific locations are compared. Detected radioisotopes and their associated gamma ray exposure rates were consistent with those expected from normal background emitters. At specific plant locations described in the report, man-made activity was consistent with the operational histories of the location. There was no spectral activity that would indicate the presence of the lost source.