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Health Physics

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https://www.readbyqxmd.com/read/28542016/health-physics-society-%C3%A2-2017-affiliate-members
#1
(no author information available yet)
No abstract text is available yet for this article.
July 2017: Health Physics
https://www.readbyqxmd.com/read/28542014/oak-ridge-reservation-environmental-protection-rad-neshaps-radionuclide-inventory-web-database-and-rad-neshaps-source-and-dose-database
#2
Patricia A Scofield, Linda L Smith, David N Johnson
The U.S. Environmental Protection Agency promulgated national emission standards for emissions of radionuclides other than radon from US Department of Energy facilities in Chapter 40 of the Code of Federal Regulations (CFR) 61, Subpart H. This regulatory standard limits the annual effective dose that any member of the public can receive from Department of Energy facilities to 0.1 mSv. As defined in the preamble of the final rule, all of the facilities on the Oak Ridge Reservation, i.e., the Y-12 National Security Complex, Oak Ridge National Laboratory, East Tennessee Technology Park, and any other U...
July 2017: Health Physics
https://www.readbyqxmd.com/read/28542013/location-modification-factors-for-potential-dose-estimation
#3
Sandra F Snyder, J Matthew Barnett
A U.S. Department of Energy facility must comply with the National Emission Standard for Hazardous Air Pollutants for radioactive air emissions. The standard is an effective dose of less than 0.1 mSv y to the maximum public receptor. Additionally, a lower dose level may be assigned to a specific emission point in a State issued permit. A method to efficiently estimate the expected dose for future emissions is described. This method is most appropriately applied to a research facility with several emission points with generally low emission levels of numerous isotopes...
July 2017: Health Physics
https://www.readbyqxmd.com/read/28542012/trends-of-training-courses-conducted-in-the-human-resources-development-center-of-the-national-institute-for-quantum-and-radiological-science-and-technology-after-the-fukushima-dai-ichi-nuclear-power-plant-accident
#4
Yuko Shimizu, Haruzo Iida, Mitsuru Nenoi
Environmental contamination with radioactive materials caused by the Fukushima Dai-ichi Nuclear Power Plant (NPP) accident in 2011 raised a serious health concern among residents in Japan, and the demand for radiation experts who can handle the radiation-associated problems has increased. The Human Resources Development Center (HRDC) of the National Institute of for Quantum and Radiological Science and Technology in Japan has offered a variety of training programs covering a wide range of technologies associated with radiation since 1959...
July 2017: Health Physics
https://www.readbyqxmd.com/read/28542011/the-weighted-peak-method-in-the-time-domain-compared-with-alternative-methods-for-assessing-lf-electric-and-magnetic-fields
#5
Helmut Keller
Directive 2013/35/EU of the European Parliament and Council recommends the weighted peak method for assessing non-thermal effects of low frequency (LF) electric and magnetic fields. This article shows that this method is very practical and user friendly and is absolutely reliable to lead to correct results when applied in the time domain. The method can be used without limitations for any field profile and emulates the underlying physical and biological effects significantly better than all other presently known methods...
July 2017: Health Physics
https://www.readbyqxmd.com/read/28542010/thermal-modeling-for-the-next-generation-of-radiofrequency-exposure-limits-commentary
#6
Kenneth R Foster, Marvin C Ziskin, Quirino Balzano
This commentary evaluates two sets of guidelines for human exposure to radiofrequency (RF) energy, focusing on the frequency range above the "transition" frequency at 3-10 GHz where the guidelines change their basic restrictions from specific absorption rate to incident power density, through the end of the RF band at 300 GHz. The analysis is based on a simple thermal model based on Pennes' bioheat equation (BHTE) (Pennes 1948) assuming purely surface heating; an Appendix provides more details about the model and its range of applicability...
July 2017: Health Physics
https://www.readbyqxmd.com/read/28542009/interpretation-of-urinary-excretion-data-from-plutonium-wound-cases-treated-with-dtpa-application-of-different-models-and-approaches
#7
Deepesh Poudel, Luiz Bertelli, John A Klumpp, Tom L Waters
After a chelation treatment, assessment of intake and doses is the primary concern of an internal dosimetrist. Using the urinary excretion data from two actual wound cases encountered at Los Alamos National Laboratory (LANL), this paper discusses several methods that can be used to interpret intakes from the urinary data collected after one or multiple chelation treatments. One of the methods uses only the data assumed to be unaffected by chelation (data collected beyond 100 d after the last treatment). This method, used by many facilities for official dose records, was implemented by employing maximum likelihood analysis and Bayesian analysis methods...
July 2017: Health Physics
https://www.readbyqxmd.com/read/28542008/radiation-risk-of-cardiovascular-diseases-in-the-cohort-of-russian-emergency-workers-of-the-chernobyl-accident
#8
V V Kashcheev, S Yu Chekin, S V Karpenko, M A Maksioutov, A N Menyaylo, K A Tumanov, E V Kochergina, P V Kashcheeva, A I Gorsky, N V Shchukina, S S Lovachev, O K Vlasov, V K Ivanov
This paper continues a series of publications that analyze the impact of radiation on incidence of circulatory system diseases in the cohort of Russian recovery operation workers (liquidators) and presents the results of the analysis of cardiovascular disease (CVD) incidence. The studied cohort consists of 53,772 liquidators who arrived in the Chernobyl accident zone within the first year after the accident (26 April 1986 to 26 April 1987). The individual doses varied from 0.0001 Gy to 1.42 Gy, and the mean external whole body dose in the cohort was 0...
July 2017: Health Physics
https://www.readbyqxmd.com/read/28542007/uranium-mining-and-norm-in-north-america-some-perspectives-on-occupational-radiation-exposure
#9
Steven H Brown, Douglas B Chambers
All soils and rocks contain naturally occurring radioactive materials (NORM). Many ores and raw materials contain relatively elevated levels of natural radionuclides, and processing such materials can further increase the concentrations of naturally occurring radionuclides. In the U.S., these materials are sometimes referred to as technologically-enhanced naturally occurring radioactive materials (TENORM). Examples of NORM minerals include uranium ores, monazite (a source of rare earth minerals), and phosphate rock used to produce phosphate fertilizer...
July 2017: Health Physics
https://www.readbyqxmd.com/read/28542006/an-efficient-affordable-optically-stimulated-luminescent-osl-annealer
#10
Sara A Abraham, Samuel J Frank, Kimberlee J Kearfott
Optically stimulated luminescent (OSL) dosimeters are devices used for measuring doses of ionizing radiation. Signal is stored within an OSL material so that when stimulated with light, light of a specific wavelength is emitted in proportion to the integrated ionizing radiation dose. Each interrogation of the material results in the loss of a small fraction of signal, thus allowing multiple interrogations leading to more accurate measurements of dose. In order to reuse a dosimeter, the residual signals from prior doses must be taken into account and subtracted from current readings, adding uncertainty to any future measurements...
July 2017: Health Physics
https://www.readbyqxmd.com/read/28542005/hail-and-farewell
#11
Michael T Ryan
No abstract text is available yet for this article.
July 2017: Health Physics
https://www.readbyqxmd.com/read/28441291/health-physics-society-%C3%A2-2017-affiliate-members
#12
(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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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