-
Risk Analysis for Overexposure Measurements Due to Radiological Accidents Using Computer Code and the Lessons Learned “Meet Halfa as a Case Study, Egypt"
Issue:
Volume 5, Issue 2, March 2017
Pages:
13-19
Received:
24 January 2017
Accepted:
15 February 2017
Published:
3 March 2017
Abstract: Large number of accidents that have occurred in three major practices, namely: industrial radiography, gamma irradiators, and radiotherapy. A radiological accident involves a sealed or unsealed radiation source leads to an uncontrolled release of ionizing radiation or radioactive materials into the environment, which may result in significant human exposure and/or material damage. A major accident occurred in greater Cairo Area during 2000 due to bad practice and human error. A radiological source (Ir-192 capsule with activity 31.5 Ci) was lost at the examination site near the pipe. Members of the public were plucked up. At least seven persons have exposed to overdoses, two of them died due to overexposure dose. In this study, the absorbed radiation doses and the associated hazards due to uncontrolled radioactive sources Ir-192 and Cs-137 are calculating using RESRAD‑Building computer code. An overview of the consequences and the obtained results are registered in lessons learned study would clarify the necessary that the regulatory authority to introduce measures capable to avoid the recurrence of similar accidents.
Abstract: Large number of accidents that have occurred in three major practices, namely: industrial radiography, gamma irradiators, and radiotherapy. A radiological accident involves a sealed or unsealed radiation source leads to an uncontrolled release of ionizing radiation or radioactive materials into the environment, which may result in significant human...
Show More
-
Specific Activities and Annual Effective Dose of Natural Radionuclides Due to the Intake of Some Types of Sugar Available in Baghdad Markets
Issue:
Volume 5, Issue 2, March 2017
Pages:
20-23
Received:
6 February 2017
Accepted:
18 February 2017
Published:
9 March 2017
Abstract: In this research the specific activity of natural radionuclides 226Ra, 232Th and 40K were determined by sodium iodide enhanced by thallium NaI (Tl) detector and assessed the annual effective dose in Beladi, Aldar, Alusraa, Alkhaleej and Aletehaad which are available in Baghdad markets. The specific activity of 40K has the greater value in all the types which is in the range of allowed levels globally that suggested by UNSCEAR. The mean value of annual effective doses was 0.198, 0.094 and 0.098 mSv/y for 226Ra, 232Th and 40K respectively.
Abstract: In this research the specific activity of natural radionuclides 226Ra, 232Th and 40K were determined by sodium iodide enhanced by thallium NaI (Tl) detector and assessed the annual effective dose in Beladi, Aldar, Alusraa, Alkhaleej and Aletehaad which are available in Baghdad markets. The specific activity of 40K has the greater value in all the t...
Show More
-
Design of Baffle and Slope for Hydraulic Characteristics of Vertical Slot Fishway
Xi Mao,
Jiehao Zhang,
Xinlan Liang,
Xiuyuan Lu,
Yanping Tan,
Min Yang,
Keming Tang
Issue:
Volume 5, Issue 2, March 2017
Pages:
24-28
Received:
14 March 2017
Accepted:
27 March 2017
Published:
15 April 2017
Abstract: The characteristics of the flow in vertical slot fishway depend mainly on the specific pool design, such as the geometry of the pool. We present the results of a study on comparison between four different designs of vertical slot fishways. The results indicated that central baffle cannot cut down the value of the velocity substantially, but it can stabilize the flow pattern, and it can make energy dissipation uniform. Simultaneously, slope has significant impact on hydraulic characteristics like velocity and flow pattern in the fishway. Of the four designs studied, design 4 is recommended for practical use, in terms of velocity and flow pattern.
Abstract: The characteristics of the flow in vertical slot fishway depend mainly on the specific pool design, such as the geometry of the pool. We present the results of a study on comparison between four different designs of vertical slot fishways. The results indicated that central baffle cannot cut down the value of the velocity substantially, but it can ...
Show More
-
Research on a Laser Ring Induced by a Metal Wire
Yu Feng,
Guang Wang,
Min Zhao
Issue:
Volume 5, Issue 2, March 2017
Pages:
29-34
Received:
12 June 2017
Published:
15 June 2017
Abstract: When the metal wire is irradiated with a beam of laser, a light ring will appear on the screen. The formation mechanism of the light ring is discussed in this article. It is also discussed how various parameters, including the shape of the laser beam, the laser diameter, the wire diameter, the wire roughness, and the incidence angle, influence the ring through computational simulation and experiments simultaneously. Our calculation is in good agreement with experimental results.
Abstract: When the metal wire is irradiated with a beam of laser, a light ring will appear on the screen. The formation mechanism of the light ring is discussed in this article. It is also discussed how various parameters, including the shape of the laser beam, the laser diameter, the wire diameter, the wire roughness, and the incidence angle, influence the ...
Show More
