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Health Physics

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https://www.readbyqxmd.com/read/30148821/health-physics-society-%C3%A2-2018-affiliate-members
#1
(no author information available yet)
No abstract text is available yet for this article.
October 2018: Health Physics
https://www.readbyqxmd.com/read/30148819/investigation-of-dose-rates-exterior-to-an-above-ground-waste-storage-facility-using-radiation-transport-models
#2
Jenelle Elicia Mann, Norbert Zoeger, Roman Koppitsch, Alexander Brandl
The dose rate profile at different heights above the ground and as a function of distance from the north, west, and south walls of an above-ground waste storage facility was analyzed using the Monte Carlo n-Particle Transport eXtended (MCNPX) radiation transport code. The waste storage facility houses 9,996 waste barrels of conditioned waste. The facility has concrete shielding added to the building walls on the north, west, and east sides, with no such additional shielding towards the roof or the south side wall; instead, the distance from the first row of barrels to the wall is extended to allow for maneuverability of a crane on the south side...
October 2018: Health Physics
https://www.readbyqxmd.com/read/30148818/evaluation-of-an-upward-trend-in-background-count-rates-from-a-stack-particulate-continuous-air-monitor
#3
Jeremy P Rishel, J Matthew Barnett, Andrey V Mozhayev, Elliott Dutch Dutcher, Scott A Colby, Gregory L Carter, Gertrude K Patello, Franciska H Steen, Eric M Hanson
The Pacific Northwest National Laboratory operates the Radiochemical Processing Laboratory, which is a multi-purpose, non-reactor nuclear research facility. Regulations require both continuous sampling and monitoring of radioactive particulates and tritium gas in the exhaust from the main stack. Releases of other radioactive gases, including planned releases of radon, are tracked separately in a database and reported. During the 2015 calibration of the Radiochemical Processing Laboratory stack continuous air monitor, measured alpha and beta background count rates were much higher than expected, especially when compared to count rates from previous calibrations...
October 2018: Health Physics
https://www.readbyqxmd.com/read/30148817/verification-of-safety-compliance-of-delivering-radionuclides-at-vanderbilt-university
#4
Liang Chen, Christopher M Helstern
Various radionuclides are transported at Vanderbilt University and Vanderbilt University Medical Center on a daily basis, to provide the necessities for diagnostic, therapeutic, and research applications. The delivery of the radionuclides takes various pathways where the general public may receive radiation doses. The Tennessee Department of Environment and Health Radiological Division regulates the dose limits for members of the public to be less than 1 mSv per year and 20 μSv in any hour. We designed a project to verify that potential doses received by the general public meet state regulations...
October 2018: Health Physics
https://www.readbyqxmd.com/read/30148816/medical-physics-quality-and-safety-in-the-cloud
#5
Ronald Leuenberger, Ryan Kocak, David W Jordan, Tim George
Science and technology have outpaced our human ability to process and analyze the myriad data systems that extend throughout an enterprise of health care networks. Medical physicists must learn to work collaboratively with computer programmers, data scientists, administrators, and health care providers in the data-rich environment of modern health care, embracing and practicing a new discipline: cloud-based medical physics. This article addresses four distinct topics: (1) Evolution of health care systems, networks and electronic medical records (EMR); (2) Evolution of medical physics with scientific discoveries and technological advancements; (3) Evolution of information technology including; metadata, enterprise and the cloud; and (4) Medical physics enterprise: adaptive approach to quality and safety for the 21st Century...
October 2018: Health Physics
https://www.readbyqxmd.com/read/30148815/a-review-of-indoor-and-outdoor-radon-equilibrium-factors-part-ii-220rn
#6
Jing Chen, Naomi H Harley
Radon exposure levels are given in terms of radon gas concentration in the air. However, in the calculation of radon dose to the lung, the radon equilibrium equivalent concentration is used. The measured equilibrium factor times the measured radon gas concentration estimates the equilibrium equivalent concentration. Therefore, equilibrium factor is an important factor in radon dose calculations. A review of published measurements of equilibrium factors shows a range of values reported in studies from more than 13 countries and regions measured in indoor residential, indoor public, and outdoor environments...
October 2018: Health Physics
https://www.readbyqxmd.com/read/30148814/a-review-of-indoor-and-outdoor-radon-equilibrium-factors-part-i-222rn
#7
Jing Chen, Naomi H Harley
Radon exposure limits are given in terms of radon gas concentration in the air. However, in the calculation of radon dose to the lung, the radon equilibrium equivalent concentration is used. The measured equilibrium factor times the measured radon gas concentration estimates the equilibrium equivalent concentration. Therefore, the equilibrium factor is an important factor in radon dose calculations. A review of published measurements of equilibrium factors shows a range of values reported in studies from more than 20 countries, measured in indoor residential, indoor public, and outdoor environments...
October 2018: Health Physics
https://www.readbyqxmd.com/read/30148813/a-holistic-approach-to-assessment-of-population-exposure-to-radiation-challenges-and-initiatives-of-a-regulatory-authority
#8
P Askounis, A Boziari, E Carinou, G Drikos, S Economides, C J Hourdakis, C Housiadas, M Kalathaki, V Kamenopoulou, E Karabetsos, K Kehagia, M Kolovou, C Koukorava, M Lasithiotakis, T Makridakis, A Maltezos, D Mitrakos, M Nikolaki, M Nikolaou, P Nicolaou, A Petri, C Potiriadis, S Raftopoulos, G Simantirakis, V Tafili, C Veltsos, S Vogiatzi, D C Xarchoulakos, K Zourari
A regulatory authority for radiation safety should continuously evaluate and improve the national safety framework, in line with current requirements and standards. In this context, the Greek Atomic Energy Commission initiated a series of concerted actions. The radiation dose to the population due to public and medical exposures was assessed. The assessment of dose due to public exposure was based on measurements of radon concentrations in dwellings, radionuclide concentrations in environmental samples, and air dose rates; the assessment of dose due to medical exposure was based on dose measurements for typical examinations or procedures and data on their frequency...
October 2018: Health Physics
https://www.readbyqxmd.com/read/30148812/optimization-of-the-icrp-67-and-ncrp-156-transfer-rates-applied-to-nonhuman-primates-intramuscularly-injected-with-241am
#9
Nada A Alomairy, Richard R Brey, Raymond A Guilmette
Nonhuman primates intramuscularly injected with Am have been investigated using the International Commission on Radiological Protection Report 67 model coupled with National Council on Radiation Protection and Measurements Report 156 model. Default parameters from these models were input into the Integrated Modules for Bioassay Analysis software to predict the intake and skeleton retention in 20 tested nonhuman primates. The predictions generated were compared to the experimental data from the Durbin nonhuman primate studies...
October 2018: Health Physics
https://www.readbyqxmd.com/read/30148811/137cs-lake-sediment-depth-profiles-and-inventories-within-four-lakes-of-idaho-s-sawtooth-wilderness
#10
Benjamin Thomas Bishop, Richard Brey
A total of 68 sediment cores from four freshwater alpine lakes in Idaho's Sawtooth Wilderness were collected during the summer of 2017. The objectives of the study were to determine depth distributions of Cs in the cores using gamma spectrometry and to estimate the sedimentation rates of the lakes from the identified geochronological peaks linked to nuclear fallout. The Cs radioactivity above reference-area values was detected in all studied lakes. The maximum Cs concentrations measured in each lake's sediment ranged from 74...
October 2018: Health Physics
https://www.readbyqxmd.com/read/30148810/comparison-of-u-s-nrc-s-rascal-emergency-response-code-with-noaa-s-hyrad-dispersion-model-and-tracer-experimental-data
#11
Michael L Abbott
The U.S. National Oceanic and Atmospheric Administration's Field Research Division uses the HYRad-HYSPLIT dispersion model to assess hypothetical accidental releases of airborne radioactive materials at the Idaho National Laboratory in southeastern Idaho. The State of Idaho Department of Environmental Quality Idaho National Laboratory Oversight Program provides independent assessment of these releases using a different model, RASCAL, which is the U.S. Nuclear Regulatory Commission's primary reactor-emergency response code...
October 2018: Health Physics
https://www.readbyqxmd.com/read/30148809/dose-estimation-in-recycling-of-decontamination-soil-resulting-from-the-fukushima-nps-accident-for-road-embankments
#12
Shizuka Takai, Takuma Sawaguchi, Seiji Takeda
Since the Fukushima nuclear power station accident, large quantities of radiocesium-contaminated soil generated from decontamination activities have been stored in Fukushima prefecture. To complete the final disposal of decontamination soil, reducing the disposal volume through recycling can prove effective. The Ministry of the Environment of Japan has developed a policy of handling low-activity decontamination soil as recycled materials under the management of public authority. The recycling is limited to civil engineering structures in public projects, such as road embankments and coastal levees...
October 2018: Health Physics
https://www.readbyqxmd.com/read/30148808/development-of-an-on-site-rapid-environmental-radiation-distribution-monitoring-system-for-decision-making-during-a-radiation-emergency
#13
UkJae Lee, Hee Reyoung Kim
An on-site, rapid, measurement-based, radiation-distribution visualization system with radionuclide recognition was developed for quick decision making during a radiation emergency. After scanning of the area was complete, radionuclide-specific radiation-distribution contours were displayed in two and three dimensions on a map of the measurement area, in a few tens of seconds, by clicking once on an execution file, which was programmed using MathWorks' MATLAB software. The contours were fundamentally verified using Cs and Co standard sources...
October 2018: Health Physics
https://www.readbyqxmd.com/read/30148807/studying-factors-affecting-indoor-gamma-radiation-dose-using-mcnp5-simulation-software-revisited-adding-two-more-factors
#14
M Orabi
The main factors that affect the gamma-radiation dose rate inside a room are defined in a simulation model. Some previously studied factors are the point of detection inside the room, the dimensions of the room, the thicknesses of the different parts of the room, and the density of the building material. The model is meant to ease the dose-rate estimation. Relative dose rates are calculated for different values of the different factors. The calculations are made using Monte Carlo n-particle simulation software...
October 2018: Health Physics
https://www.readbyqxmd.com/read/29889701/case-study-of-the-minimum-provable-risk-considering-the-variation-in-background-risk-effect-of-residual-risk-on-epidemiological-studies-and-a-comparative-assessment-of-fatal-disease-risk-due-to-radiation-exposure
#15
Michiya Sasaki, Haruyuki Ogino, Takatoshi Hattori
In order to prove a small increment in a risk of concern in an epidemiological study, a large sample of a population is generally required. Since the background risk of an end point of interest, such as cancer mortality, is affected by various factors, such as lifestyle (diet, smoking, etc.), adjustment for such factors is necessary. However, it is impossible to inclusively and completely adjust for such factors; therefore, uncertainty in the background risk remains for control and exposed populations, indicating that there is a minimum limit to the lower bound for the provable risk regardless of the sample size...
October 2018: Health Physics
https://www.readbyqxmd.com/read/30084843/health-physics-society-%C3%A2-2018-affiliate-members
#16
(no author information available yet)
No abstract text is available yet for this article.
September 2018: Health Physics
https://www.readbyqxmd.com/read/30045126/calibration-of-radiation-portal-monitors-for-characterization-of-historic-low-level-radioactive-waste
#17
David Cole, Nicolas Martin-Burtart
Radiation portal monitors are large-volume radiation detectors typically positioned along roadways, railways, and pedestrian portals. They are typically used for the detection of radioactive material where no such material is expected. Applications include monitoring vehicles and personnel exiting nuclear facilities, at the entrance to steel and scrap metal facilities, and at international borders. As part of the Port Hope Area Initiative, the Port Granby Project involves the relocation of approximately 450,000 m of historic low-level radioactive waste, located at an existing site on the shoreline of Lake Ontario in Southeast Clarington, to a new, engineered aboveground mound...
September 2018: Health Physics
https://www.readbyqxmd.com/read/30045125/compliance-with-the-u-s-nuclear-regulatory-commission-revised-licensing-guidance-for-radioactive-seed-localization
#18
Michael Sheetz, Cynthia Steiner
The use of radioactive seed localization (RSL) as a reliable alternative to wire localization (WL) for guiding the surgical excision of non-palpable lesions has become more popular because of its demonstrated advantages for both the patient and surgeon. RSL is regulated under 10 CFR 35.1000 (Other Medical Uses) for which the U.S. Nuclear Regulatory Commission (U.S. NRC) issued its original licensing guidance entitled "I-125 and Pd-103 Low Dose Rate Brachytherapy Seeds Used for Localization of Non-palpable Lesions" in 2006...
September 2018: Health Physics
https://www.readbyqxmd.com/read/30045124/mitigating-the-psychological-harm-from-actinide-intakes
#19
John A Klumpp, Luiz Bertelli, Jeffrey Hoffman, Deepesh Poudel, Tom Waters
Investigations into possible actinide intakes, as well as the intakes themselves, may result in significant psychological harm that should be mitigated by the internal dosimetrist. Many aspects of this psychological impact are unique to actinide intakes and have not been discussed in the literature. This paper discusses some of these unique considerations and describes how the Internal Dosimetry Team at Los Alamos National Laboratory (LANL) has, with input and guidance from LANL psychologists, tried to address them...
September 2018: Health Physics
https://www.readbyqxmd.com/read/30045123/response-to-hayes-lnt-contradicts-biology-but-alara-gets-lethal
#20
Ludwig E Feinendegen, Jerry M Cuttler
No abstract text is available yet for this article.
September 2018: Health Physics
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