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Health Physics

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https://www.readbyqxmd.com/read/28234705/health-physics-society-%C3%A2-2017-affiliate-members
#1
(no author information available yet)
No abstract text is available yet for this article.
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234704/the-health-physics-society-an-affiliate-of-the-international-radiation-protection-association-irpa
#2
(no author information available yet)
No abstract text is available yet for this article.
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234703/accuracy-of-cloudshine-gamma-dose-calculations-in-the-cap-88-dispersion-model
#3
Michael W McNaughton, Jessica M Gillis, Elizabeth Ruedig, Jeffrey J Whicker, David P Fuehne
The U.S. Environmental Protection Agency dispersion model, CAP-88, calculates ground-level dose using the ground-level concentration and the semi-infinite cloud approximation. Doses can be underestimated for elevated plumes during stable atmospheric conditions at receptor locations within a kilometer downwind of a stack. The purpose of this paper is to identify when CAP-88 calculations of gamma dose from cloudshine are inaccurate and provide estimates of the inaccuracy. The method used compares CAP-88 estimates with Monte Carlo N-Particle (MCNP) estimates...
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234702/further-developments-in-beta-gamma-to-alpha-ratios
#4
David L Smith
An emphasis on alpha-emitting nuclides at nuclear power plants has produced methods for assessing the relative hazard of alpha versus other species. From the relative hazards, or ratios, decisions on the level of effort for worker protection and monitoring are made. The Electric Power Research Institute (EPRI) has issued technical guidance on relative alpha hazard and action level beta-gamma to alpha ratios. This paper shows the development of the ratio concept from first principles and brings hard-to-detect species into consideration...
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234701/radiation-exposure-and-safety-precautions-following-131cs-brachytherapy-in-patients-with-brain-tumors
#5
Menachem Z Yondorf, Theodore H Schwartz, John A Boockvar, Susan Pannullo, Philip Stieg, Albert Sabbas, Albert Pavese, Samuel Trichter, Lucy Nedialkova, Bhupesh Parashar, Dattatreyudu Nori, K S Clifford Chao, A Gabriella Wernicke
Cesium-131 (Cs) brachytherapy is a safe and convenient treatment option for patients with resected brain tumors. This study prospectively analyzes radiation exposure in the patient population who were treated with a maximally safe neurosurgical resection and Cs brachytherapy. Following implantation, radiation dose rate measurements were taken at the surface, 35 cm, and 100 cm distances. Using the half-life of Cs (9.69 d), the dose rates were extrapolated at these distances over a period of time (t = 30 d). Data from dosimetry badges and rings worn by surgeons and radiation oncologists were collected and analyzed...
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234700/rso-interview-with-nanci-burchell
#6
(no author information available yet)
No abstract text is available yet for this article.
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234699/space-the-final-frontier-research-relevant-to-mars
#7
John D Boice
A critically important gap in knowledge surrounds the health consequences of exposure to radiation received gradually over time. Much is known about the health effects of brief high-dose exposures, such as from the atomic bombings in Japan, but the concerns today focus on the frequent low-dose exposures received by members of the public, workers, and, as addressed in this paper, astronauts. Additional guidance is needed by the National Aeronautics and Space Administration (NASA) for planning long-term missions where the rate of radiation exposure is gradual over years and the cumulative amounts high...
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234698/review-of-gender-and-racial-diversity-in-radiation-protection
#8
Elizabeth Gillenwalters, Nicole Martinez
The rapidly changing demographics of the United States workforce include a large number of women and members of minority groups that are currently underrepresented in science and engineering-related education and careers. Recent research indicates that while singular incidents of sexism do exist, gender bias more often affects women in various subtle ways. The effects of stereotype threat and the lack of appropriate mentoring and female role models are samples of the possible factors contributing to performance and longevity for women in math-intensive fields...
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234697/contributions-from-women-to-the-radiation-sciences-a-brief-history
#9
Nicole E Martinez
Contributions from men to radiation science are well known, particularly the early contributions from such luminaries as William Roentgen, James Chadwick, Niels Bohr, Robert Oppenheimer, and the like. Although not ignored per se, beyond Marie Curie and Lise Meitner, the contributions of female nuclear scientists are not as widely recognized. This paper provides a concise historical summary of contributions to radiation science from the discovery of radiation through the current status of international leadership within the radiation protection community...
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234696/investigation-of-workplace-like-calibration-fields-via-a-deuterium-tritium-d-t-neutron-generator
#10
Andrey V Mozhayev, Roman K Piper, Bruce A Rathbone, Joseph C McDonald
Radiation survey meters and personal dosimeters are typically calibrated in reference neutron fields based on conventional radionuclide sources, such as americium-beryllium (Am-Be) or californium-252 (Cf), either unmodified or heavy-water moderated. However, these calibration neutron fields differ significantly from the workplace fields in which most of these survey meters and dosimeters are being used. Although some detectors are designed to yield an approximately dose-equivalent response over a particular neutron energy range, the response of other detectors is highly dependent upon neutron energy...
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234695/137cs-dosimeter-irradiation-facilities-calibration-frequency-precision-and-accuracy
#11
Andrew J Boria, Blake D Rucinski, Sara A Abraham, Alexander S Dawson, Ali H Jawad, Joseph A Miklos, Kimberlee J Kearfott
Many dosimeter and instrument calibration sources, especially Cs irradiators permanently installed in facilities, are infrequently calibrated since their geometry is not subject to large variation, their mechanisms are simple, and their operation can be visibly error-free for decades. Only decay corrections are needed to know delivered doses at fixed locations once a thorough characterization of such facilities is completed. For one such Cs source, however, collected current values in a span of a few days were found to drop significantly...
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234694/using-the-health-physics-student-volunteer-program-for-a-research-project-sponsored-by-the-medical-section-of-the-health-physics-society
#12
Joseph Steiner, Penny Leinwander
The Health Physics Society (HPS) Medical Health Physics Section (MHPS) received a request to research data on radiation safety guidance related to the death of patients who have recently received therapeutic doses of sealed or unsealed therapy sources. The MHPS elected to use student volunteers to perform this research. The purpose of this manuscript is to describe and provide a template for the process used by the MHPS to develop a student volunteer program. To implement the student volunteer program, the MHPS collaborated with the HPS Student Support Committee to develop a research proposal and a student volunteer selection process...
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234693/modeling-considerations-for-ingestion-pathway-dose-calculations-using-cap88
#13
David Stuenkel
The CAP88-PC computer model was developed by the U.S. Environmental Protection Agency to demonstrate compliance under the National Emission Standards for Hazardous Air Pollutants (NESHAPS). The program combines atmospheric transport models with the terrestrial food chain models in the U.S. Nuclear Regulatory Commission Regulatory Guide 1.109 to compute the radionuclide concentrations in the air, on ground surfaces and plants, and the concentrations in food to estimate the dose to individuals living in the area around a facility emitting radionuclides into the atmosphere...
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234692/dose-comparisons-for-a-site-specific-representative-person-using-the-age-dependent-dose-coefficients-in-cap88-pc-version-4
#14
Brooke H Stagich, Kelsey R Moore, Joseph R Newton, Kenneth L Dixon, G Timothy Jannik
Most U.S. Department of Energy (DOE) facilities with radiological airborne releases use the U.S. Environmental Protection Agency's (EPA) environmental dosimetry code CAP88-PC to demonstrate compliance with regulations in 40CFR61, subpart H [National Emission Standards for Hazardous Air Pollutants: Radiological (NESHAP)]. In 2015, EPA released Version 4 of CAP88-PC, which included significant modifications that improved usability and age-dependent dose coefficients and usage factors for six age groups (infant, 1 y, 5 y, 10 y, 15 y, and adult)...
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234691/reconstruction-of-a-radiological-release-using-aerosol-sampling
#15
Robert Bruce Hayes
Reconstructing a radiological release using offsite air sampling is considered using measurements from the WIPP site event. Demonstration of the capabilities is shown using the HotSpot code as an example of the approach in general. The results show the empirical steps that could be folded into an iterative approach to back extrapolation of a radiological release from a nuclear facility. It is shown here that the limiting factor in detection is not counting statistics of the activity but rather the statistics for aerosols having small sample population numbers due to the lognormal distribution of particle radii...
April 2017: Health Physics
https://www.readbyqxmd.com/read/28234690/transition
#16
Michael T Ryan, Craig A Little
No abstract text is available yet for this article.
April 2017: Health Physics
https://www.readbyqxmd.com/read/28121734/health-physics-society-%C3%A2-2017-affiliate-members
#17
(no author information available yet)
No abstract text is available yet for this article.
March 2017: Health Physics
https://www.readbyqxmd.com/read/28121733/the-health-physics-society-an-affiliate-of-the-international-radiation-protection-association-irpa
#18
(no author information available yet)
No abstract text is available yet for this article.
March 2017: Health Physics
https://www.readbyqxmd.com/read/28121731/differences-in-radiation-activity-between-glass-and-resin-90y-microspheres-in-treating-unresectable-hepatic-cancer
#19
Trent James, Jacqueline Hill, Thomas Fahrbach, Zachary Collins
The purpose of this study was to compare the difference in prescribed radiation activity between glass and resin yttrium-90 (Y) microspheres for radioembolization of unresectable hepatocellular carcinoma (HCC) or liver metastases at a tertiary care teaching institution. The authors performed a retrospective analysis on 126 patients with primary HCC and hepatic metastatic disease from extrahepatic primary cancers who underwent radioembolization with glass or resin particles between 2008 and 2013 at their institution...
March 2017: Health Physics
https://www.readbyqxmd.com/read/28121730/radon-release-and-its-simulated-effect-on-radiation-doses
#20
Momen Orabi
One of the main factors that affect the uncertainty in calculating the gamma-radiation absorbed dose rate inside a room is the variation in the degree of secular equilibrium of the considered radioactive series. A component of this factor, considered in this paper, is the release of radon (Rn) from building materials to the living space of the room. This release takes place through different steps. These steps are represented and mathematically formulated. The diffusion of radon inside the material is described by Fick's second law...
March 2017: Health Physics
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