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Health Physics

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https://www.readbyqxmd.com/read/28441291/health-physics-society-%C3%A2-2017-affiliate-members
#1
(no author information available yet)
No abstract text is available yet for this article.
June 2017: Health Physics
https://www.readbyqxmd.com/read/28441289/radiological-nuclear-human-monitoring-tabletop-exercise-recommendations-and-lessons-identified
#2
Vinita Chauhan, Devin Duncan, Ruth C Wilkins
Health Canada is the lead department for coordinating the federal response to a Canadian nuclear emergency event. The framework to manage a radiological consequence is outlined in the Federal Nuclear Emergency Plan (FNEP). In 2014, a full scale exercise (FSX) was held to test the capacity of the federal government to handle a nuclear facility emergency disaster in Canada. The FSX provided a means to demonstrate the integration of various departments and agencies in response to such an event, and although a number of task teams within FNEP were tested, the capacity to monitor humans for exposure post-event was not played out fully...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28441288/investigation-of-optically-stimulated-luminescence-and-signal-fading-properties-of-several-materials
#3
W Geoffrey West, Kimberlee J Kearfott, Chun Yong Seow
Optically stimulated luminescence (OSL) dosimetry involves the illumination of an irradiated sample on an appropriate material to produce a stimulated emission of light, whose intensity is indicative of the radiation dose. This technique is currently used for personnel dosimetry, environmental dosimetry, and geological dating applications. While a great deal of published research focusing on α-Al2O3:C and natural materials used for geological dating exist, relatively little is known about the OSL properties of thermoluminescent (TL) materials...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28441287/lessons-learned-in-protection-of-the-public-for-the-accident-at-the-fukushima-daiichi-nuclear-power-plant
#4
Jessica Callen, Toshimitsu Homma
What insights can the accident at the Fukushima Daiichi nuclear power plant provide in the reality of decision making on actions to protect the public during a severe reactor and spent fuel pool emergency? In order to answer this question, and with the goal of limiting the consequences of any future emergencies at a nuclear power plant due to severe conditions, this paper presents the main actions taken in response to the emergency in the form of a timeline. The focus of this paper is those insights concerning the progression of an accident due to severe conditions at a light water reactor nuclear power plant that must be understood in order to protect the public...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28441286/behavior-of-americium-in-simulated-wounds-in-nonhuman-primates
#5
Deepesh Poudel, Raymond A Guilmette, Luiz Bertelli, John A Klumpp, Richard R Brey
An americium solution injected intramuscularly into several nonhuman primates (NHPs) was found to behave differently than predicted by the wound models described in the NCRP Report 156. This was because the injection was made along with a citrate solution, which is known to be more soluble than chlorides, oxides, or nitrates on which the NCRP Report was based. A multi-exponential wound model specific to the injected americium solution was developed based on the retention in the intramuscular sites. The model was coupled with the americium systemic model to interpret the urinary excretion data and assess the intake, and it was determined that the models were adequate to predict early urinary excretion in most cases but unable to predict late urinary excretion...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28441285/induced-radioactivity-in-lead-shielding-at-the-national-synchrotron-light-source
#6
Vinita J Ghosh, Charles Schaefer, Henry Kahnhauser
The National Synchrotron Light Source (NSLS) at Brookhaven National Laboratory was shut down in September 2014. Lead bricks used as radiological shadow shielding within the accelerator were exposed to stray radiation fields during normal operations. The FLUKA code, a fully integrated Monte Carlo simulation package for the interaction and transport of particles and nuclei in matter, was used to estimate induced radioactivity in this shielding and stainless steel beam pipe from known beam losses. The FLUKA output was processed using MICROSHIELD® to estimate on-contact exposure rates with individually exposed bricks to help design and optimize the radiological survey process...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28441284/comparison-of-homogeneous-and-particulate-lung-dose-rates-for-small-mammals
#7
Emily Caffrey, Mathew Johansen, Jarvis Caffrey, Kathryn Higley
Small, highly radioactive fragments of material incorporated into metallic matrices are commonly found at nuclear weapons test and accident sites and can be inhaled by wildlife. Inhaled particles often partition heterogeneously in the lungs, with aggregation occurring in the periphery of the lung, and are tenaciously retained. However, dose rates are typically calculated as if the material were homogeneously distributed throughout the entire organ. Here the authors quantify the variation in dose rates for alpha-, beta-, and gamma-emitting radionuclides with particle sizes from 0...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28441283/early-intake-of-radiocesium-by-residents-living-near-the-tepco-fukushima-dai-ichi-nuclear-power-plant-after-the-accident-part-2-relationship-between-internal-dose-and-evacuation-behavior-in-individuals
#8
Naoaki Kunishima, Osamu Kurihara, Eunjoo Kim, Tetsuo Ishikawa, Takashi Nakano, Kumiko Fukutsu, Kotaro Tani, Kazuo Furuyama, Shozo Hashimoto, Misao Hachiya, Yutaka Naoi, Makoto Akashi
The Tokyo Electric Power Company's Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident exposed members of the public to radiation. This study analyses the relation between personal behavior data obtained from 112 out of 174 subjects who underwent whole-body measurements by the National Institute of Radiological Sciences (NIRS) during the period from 27 June to 28 July 2011 and their committed effective doses (CEDs) from Cs and Cs. The whereabouts of the 112 persons living in municipalities near the FDNPP (mainly, Namie town) on several days in March 2011 are graphed on maps...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28441282/magnetic-field-reference-levels-for-arbitrary-periodic-waveforms-for-prevention-of-peripheral-nerve-stimulation
#9
Gregory B Gajda, Stephen H Bly
Guidelines for prevention of peripheral nerve stimulation from exposure to low frequency magnetic fields have been developed by standard-setting bodies. Exposure limits or reference levels (RLs) are typically set in terms of the maximum root-mean-square amplitude of a sinusoidal waveform; however, environmental flux densities are often periodic, non-sinusoidal waveforms. This work presents a procedure for deriving RLs for any generalized periodic waveform using the empirical nerve-stimulation threshold data obtained from human volunteer MRI experiments...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28350709/health-physics-society-%C3%A2-2017-affiliate-members
#10
(no author information available yet)
No abstract text is available yet for this article.
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350707/a-useful-gadget-to-reduce-the-radiation-dose-of-interventionist-s-hands
#11
Banafsheh Zeinali-Rafsanjani, Alireza Rasekhi, Mahdi Saeedi-Moghadam, Fariba Zarei, Reza Jalli, Sepideh Sefidbakht, Parisa Pishdad
Increased demand for interventional radiology techniques has interventionists performing a large number of these procedures. Measurements and calculations have shown that the radiation doses received by these specialists can exceed the threshold of radiation-induced deterministic effects unless radiation protection procedures and devices are used. Proper usage of radiation protection devices can protect them from radiation-induced effects, even with a high workload. Occupational radiation protection entails proper training of interventionists to increase their awareness about available appropriate protection tools and equipment, and devices that can be used to minimize exposure, such as needle holders, tubing extensions, and injectors...
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350706/a-posting-peculiarity
#12
Brant A Ulsh, Ed Bradley
The definitions of "radiation area," "high radiation area," and "very high radiation area," provided by the U.S. Department of Energy in 10 CFR Part 835.2, and by the Nuclear Regulatory Commission in 10 CFR Part 20.1003, appear to require redundant posting. This is counterintuitive and would be confusing if the regulations were followed as currently written. We suspect that this is unintentional. However, until the relevant regulations are revised, it is recommended that licensees request written clarification from the regulators to ensure that they are able to demonstrate regulatory compliance...
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350705/rso-interview-with-miguel-de-la-guardia
#13
(no author information available yet)
No abstract text is available yet for this article.
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350704/change
#14
Craig A Little
No abstract text is available yet for this article.
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350703/rf-safety-analysis-of-a-novel-ultra-wideband-fetal-monitoring-system
#15
Jerrold T Bushberg, J Paul Tupin
The LifeWave Ultra-Wideband RF sensor (LWUWBS) is a monitoring solution for a variety of physiologic assessment applications, including maternal fetal monitoring in both the antepartum and intrapartum periods. The system uses extremely low power radio frequency (RF) ultra-wide band (UWB) signals to provide continuous fetal heart rate and contractions monitoring during labor and delivery. Even with the incorporation of three very conservative assumptions, (1) concentration of the RF energy in 1 cm, (2) minimal (2...
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350702/dose-conversion-coefficients-based-on-taiwanese-reference-phantoms-and-monte-carlo-simulations-for-use-in-external-radiation-protection
#16
Shu-Jun Chang, Jui-Ting Hsu, Shih-Yen Hung, Yan-Lin Liu, Shiang-Huei Jiang, Jay Wu
Reference phantoms are widely applied to evaluate the radiation dose for external exposure. However, the frequently used reference phantoms are based on Caucasians. Dose estimation for Asians using a Caucasian phantom can result in significant errors. This study recruited 40 volunteers whose body sizes are close to the average Taiwanese population. Magnetic resonance imaging was performed to obtain the organ volume for construction of the Taiwanese reference man (TRM) and Taiwanese reference woman (TRW). The dose conversion coefficients (DCC) resulting from photo beams in anterior-posterior, posterior-anterior, right-lateral, left-lateral, and isotropic irradiation geometries were estimated...
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350701/interpretation-of-nasal-swab-measurements-following-suspected-releases-of-actinide-aerosols
#17
John Klumpp, Luiz Bertelli, Tom Waters
For radionuclides such as plutonium and americium, detection of removable activity in the nose (i.e., nasal swab measurements) are frequently used to determine whether follow-up bioassay measurements are warranted following a potential intake. For this paper, the authors analyzed 429 nasal swab measurements taken following incidents or suspicious circumstances (such as an air monitor alarming) at Los Alamos National Laboratory (LANL) for which the dose was later evaluated using in vitro bioassay. Nasal swab measurements were found to be very poor predictors of dose and should not be used as such in the field...
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350700/effects-of-medical-diagnostic-low-dose-x-rays-on-human-lymphocytes-mitochondrial-membrane-potential-apoptosis-and-cell-cycle
#18
Montree Tungjai, Nutnicha Phathakanon, Kanokporn Noy Rithidech
Low-dose radiation is widely used across the world for the diagnosis of many diseases by means of a variety of imaging technologies. However, the harmful effects of exposure to low-dose radiation during medical examination remain controversial. The authors studied the effects of medical diagnostic low-dose x rays (i.e., 0.03, 0.05, or 0.1 mGy) after an in vitro exposure of human lymphocytes. Cells with no irradiation served as the non-irradiated control group. Three biological indicators were used to determine the effects of medical diagnostic low-dose x rays at 4, 8, 24, 48, and 72 h post-irradiation...
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350699/rapid-analysis-of-239-238pu-241am-and-90sr-for-nasal-smear-samples-in-radiation-emergency-and-evaluation-of-intake-retention-fraction
#19
Seokwon Yoon, Wi-Ho Ha, Sunhoo Park, Seung-Sook Lee, Young-Woo Jin
The efficiency of the nasal smear method was reviewed to perform a method of sample collection, analysis and initial dose estimation. The screening method of alpha-emitting radionuclides using chemical separation and alpha spectrometry was also studied. To rapidly conduct the appropriate response to victims, special monitoring for Pu, Am, and Sr using sequential analysis was established, and the method was successfully validated through participation in an international inter-comparison program. The duration of the analysis method was evaluated with regard to application in emergency situations because of its relatively rapid treatment and counting time...
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350698/gamma-ray-dose-from-an-overhead-plume
#20
Michael W McNaughton, Jessica M Gillis, Elizabeth Ruedig, Jeffrey J Whicker, David P Fuehne
Standard plume models can underestimate the gamma-ray dose when most of the radioactive material is above the heads of the receptors. Typically, a model is used to calculate the air concentration at the height of the receptor, and the dose is calculated by multiplying the air concentration by a concentration-to-dose conversion factor. Models indicate that if the plume is emitted from a stack during stable atmospheric conditions, the lower edges of the plume may not reach the ground, in which case both the ground-level concentration and the dose are usually reported as zero...
May 2017: Health Physics
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