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HPS's Eric Goldin: On health physics
Eric Goldin, president of the Health Physics Society, is a radiation safety specialist with 40 years of experience in power reactor health physics, supporting worker and public radiation safety programs. A certified health physicist since 1984, he has served on the American Board of Health Physics, and since 2004, he has been a member of the National Council on Radiation Protection and Measurements’ Program Area Committee 2, which provides guidance for radiation safety in occupational settings for a variety of industries and activities. He was awarded HPS Fellow status in 2012 and was elected to the NCRP in 2014.
Goldin’s radiological engineering experience includes ALARA programs, instrumentation, radioactive waste management, emergency planning, dosimetry, decommissioning, licensing, effluents, and environmental monitoring.
The HPS, headquartered in Herndon, Va., is the largest radiation safety society in the world. Its membership includes scientists, safety professionals, physicists, engineers, attorneys, and other professionals from academia, industry, medical institutions, state and federal government, the national laboratories, the military, and other organizations.
The HPS’s activities include encouraging research in radiation science, developing standards, and disseminating radiation safety information. Its members are involved in understanding, evaluating, and controlling the potential risks from radiation relative to the benefits.
Goldin talked about the HPS and health physics activities with Rick Michal, editor-in-chief of Nuclear News.
Shaoqiu Huang, Zhiqiang Zhu, Wangli Huang, Jian He, Jie Yu
Nuclear Technology | Volume 203 | Number 3 | September 2018 | Pages 315-324
Technical Paper | dx.doi.org/10.1080/00295450.2018.1460126
Articles are hosted by Taylor and Francis Online.
The vibration effect induced by acoustic pressure is one of the issues for ultrasonic Doppler velocimetry measurement in small flow channels. In this paper, the vibration effect in liquid metal lead-bismuth (PbBi) is analyzed. It is found that the vibration velocity is affected by the excitation voltage, backing layer thickness, and fluid acoustic impedance. The vibration velocity increases with excitation voltage and decreases with fluid acoustic impedance. Besides, when the thickness increases from 2 to 6 mm, the vibration velocity decreases slightly, but there are no obvious changes when the thickness is more than 6 mm. Therefore, the excitation voltage should be as low as possible, and the backing layer thickness should be more than 6 mm to minimize the vibration effect. The vibration velocity presents large fluctuation in the near field, while it decreases with the transmission distance in the far field. When the excitation voltage is 36 V, the highest vibration velocity in liquid PbBi is up to 28 mm/s in the vicinity of the transducer. Thus, it may cause relatively large deviation in the transient velocity measurement and disturb the evaluation of turbulence pulsation in small flow channels.