CHARACTERISATION OF RADIOPHOTOLUMINESCENCE DOSIMETRY SYSTEM FOR INDIVIDUAL MONITORING

2020 ◽  
Vol 190 (1) ◽  
pp. 66-70
Author(s):  
M Hajek ◽  
M Sugiyama ◽  
G Kolb ◽  
D M Tucker ◽  
M Pinak
Keyword(s):  
Performance Evaluation ◽  
Radiation Safety ◽  
Dose Dependence ◽  
Beta Radiation ◽  
Energy Agency ◽  
Type Test ◽  
Approval Procedure ◽  
Dosimetry System ◽  
Personal Dosimetry ◽  
Test Requirements

Abstract Performance evaluation is typically assessed as part of the approval procedure to verify that a dosimetry system fulfils specified national or international type-test requirements under representative exposure conditions that are expected to mimic workplace fields from the radiological activities being monitored. The International Atomic Energy Agency Radiation Safety Technical Services Laboratory has recently implemented an integrated radiophotoluminescence (RPL) personal dosimetry system developed by Chiyoda Technol Corporation. This paper reports on the successful verification of dosimetric performance properties of the RPL dosimetry system to IEC 62387:2020, in which the badges were exposed to a range of radiation energies and angles of incidence as well as other influence parameters. Characteristics under test included the coefficient of variation, non-linearity of response due to dose dependence as well as the energy and angular response to photon and beta radiation.

Discussion on Rules of Inspection and Type Test for Imported Pressure Piping Valves in China

2018 ◽  
Author(s):  
Lu-yun Zhou ◽  
Ming-hai Fu ◽  
Wei-pu Xu
Keyword(s):  
Case Analysis ◽  
Test Case ◽  
Test Standards ◽  
Pipeline Valve ◽  
Foreign Countries ◽  
Inspection And Quarantine ◽  
Type Test ◽  
Pressure Pipeline ◽  
Test Requirements ◽  
Foreign Enterprises

In recent years, the number of imported Chinese pressure pipeline valves has been increasing, and the Administration of Quality Supervision Inspection and Quarantine (AQSIQ) issued Circular No. 151 in 2012 to clarify that the imported pressure piping valves need to have type test by the bodies approved by the type testing administration verified by AQSIQ. This paper makes a comparative study on the differences of the valve test and the test standard commonly used in China and in the foreign countries, as well as on the relevant requirements of the valve manufacturing standards involved in the imported valve type test. Through the comparison on above test standards and type test requirements, the foreign manufacturers will understand the standard differences, inspection requirements and precautions when importing China’s pressure pipeline valve. Combined with imported valve inspection and type test case analysis to help foreign enterprises fully understand our laws and regulations to ensure that when they import Chinese valve, they can meet our requirements to ensure the use security.

scholarly journals Review on monitoring natural and environmental radiation and its potential from mining products

2021 ◽  
Vol 32 (1) ◽  
pp. 11-20
Author(s):  
Imam Ghazali Yasmint
Keyword(s):  
Nuclear Energy ◽  
Radiation Safety ◽  
National Level ◽  
Natural Uranium ◽  
Environmental Radiation ◽  
Natural Radiation ◽  
Energy Agency

Monitoring of natural radiation in Indonesia has been carried out by various parties, from researchers, academics at universities to special agencies tasked with handling this matter, such as the National Nuclear Energy Agency (Batan) and the Nuclear Energy Supervisory Agency (Bapeten). Batan through the Center for Radiation Safety and Metrology Technology (PTKMR) is in charge of monitoring natural radiation at the national level. The purpose of this paper is to review the monitoring of natural and environmental radiation in Indonesia and the potential of mining products as a source of natural radiation. The mining products that will be reviewed in this paper are natural uranium and thorium which are usually found in several mines, such as tin mines and others.

scholarly journals The Shielding Volume Reduction in a High Dose Rate Brachytherapy Room

2021 ◽  
Author(s):  
◽  
S. González-Guzmán
Keyword(s):  
Radiation Safety ◽  
Treatment Time ◽  
High Dose Rate ◽  
High Dose ◽  
Regulatory Body ◽  
Energy Agency ◽  
Room Design ◽  
Safety Parameters ◽  
Iridium 192 ◽  
Shielding Material

This paper describes a method to reduce the shielding thickness in a high dose brachytherapy treatment room, with an Iridium-192 source, using the protocols established by the International Atomic Energy Agency in its Safety Report No. 47; calculating the volume of shielding material, without failing to comply with the radiation safety parameters established by the General Radiation Safety Regulations and regulations in force by the Comisión Nacional de Seguridad Nuclear y Salvaguardias, which acts as the regulatory body for the use of radioactive sources in Mexico. The shielding of the walls was determined as a function of room design, source activity, workload, use factor, number of weekly treatments, treatment time, and shielding material properties. The results show that the shielding volume can be reduced by 19.592% and 20.727% for five-point and eleven-point fractionation, respectively, for a Brachytherapy room with a maze.

Radiation catalytical effects in the pre-irradiated and thermally treated catalyst BASF K-3-10

1987 ◽  
Vol 52 (10) ◽  
pp. 2383-2391 ◽  
Author(s):  
Alois Motl
Keyword(s):  
Catalyst Activity ◽  
Dose Dependence ◽  
Nitrogen Atmosphere ◽  
Beta Radiation ◽  
Fast Neutrons ◽  
Strong Decrease ◽  
Γ Radiation ◽  
Different Types ◽  
Total Disappearance ◽  
Thermal Stability Of

The effects of various thermal treatment methods on the radiation catalytical effects, induced by the pre-irradiation of the BASF K-3-10 catalyst by the γ- or β-radiation or by fast neutrons, were investigated. It has been found that the calcination of the irradiated non-reduced catalyst results in a strong decrease or even in total disappearance of the final radiation catalytical effects; however, at the same time the catalytical activity of the unirradiated catalyst was found to increase. The calcination of the catalysts in nitrogen atmosphere after reduction led also to a substantial decrease of the resulting positive radiation catalytical effects and exceeding a certain calcination temperature resulted in the decrease even of the unirradiated catalyst activity. It could be concluded that the calcination in nitrogen of the reduced irradiated samples decreases the radiation catalytical effects less than the calcination on air of the non-reduced irradiated samples. In both cases a different thermal stability of effects induced by different types of the ionizing radiation has been observed and it has been found that it increases in the sequence beta radiation – gamma radiation – fast neutrons. The investigation of the γ radiation dose dependence of the radiation catalytical effect on the catlyst calcinated before irradiation under the access of air showed that the final radiation catalytical effects are lower than those observed in the case of similarly irradiated but non-calcinated samples. At the same time the dose dependence of the effect has the same character in both cases.

scholarly journals Role of Competent Authority in Strengthening of Radiation Safety Infrastructure for Nuclear Medicine Facilities in Bangladesh

2016 ◽  
Vol 17 (2) ◽  
pp. 125-129
Author(s):  
Md Mofazzal Haider ◽  
Mehrun Nahar ◽  
Mustafizur Rahman ◽  
Amzad Hossain ◽  
Shahidul Islam ◽  
...  
Keyword(s):  
Nuclear Medicine ◽  
Radiation Safety ◽  
Competent Authority ◽  
Point Of View ◽  
International Standards ◽  
National Standard ◽  
Energy Agency ◽  
Medical Sector ◽  
Generating Equipment ◽  
Safety Features

The peaceful use of radioactive sources/radiation generating equipment, in different areas, particularly in the medical sector contributes a lot in ensuring better quality treatment. The simple examples of beneficial application of radiation in the nuclear medicine are where radiation is being used for diagnosis and treatment of the patient. The misused or uncontrolled use of radiation can be a matter of serious concern for the human health in such kind of application. It is therefore essential to establish a stringent regulatory framework to avoid unwanted radiation exposure. According to International Atomic Energy Agency (IAEA) and national standard, every country should have an independent regulatory authority, which will maintain a process in order to control radiation related activities. In the present study, a comprehensive investigation is done on the nuclear medicine practices to assess the variations, which may happen in radiation safety situation due to the regulatory activities. The study is carried out including 5 nuclear medicine facilities, which are arbitrarily chosen, and their safety features are analyzed accordingly from the regulatory point of view. It is observed that at the outset of regulatory functions the radiation safety conditions of the facilities were not up to the level, as it was required by national and international standards. But the significant progress has been observed in the facilities within the couple of years after initiation of the regulatory program by the competent authority.Bangladesh J. Nuclear Med. 17(2): 125-129, July 2014

Characterization of Si Convertors of Beta-Radiation in the Scanning Electron Microscope

2015 ◽  
Vol 242 ◽  
pp. 312-315 ◽  
Author(s):  
M.A. Polikarpov ◽  
Eugene B. Yakimov
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Collection Efficiency ◽  
Radiation Energy ◽  
Dose Dependence ◽  
Beta Radiation ◽  
Beta Particles ◽  
Depth Dose ◽  
Collection Probability ◽  
Scanning Electron

The approach for imitation of beta radiation using the e-beam of scanning electron microscope (SEM) for semiconductor energy converter testing is proposed. It is based on the Monte-Carlo simulation of depth-dose dependence for beta-particles and a determination of collection probability from the EBIC measurements of collection efficiency dependence on beam energy. Experiments with the 63Ni radiation source confirm that such approach allows to predict the efficiency of semiconductor structures for radiation energy conversion to electric power.

Advanced Networked Modular Personal Dosimetry System

2014 ◽  
pp. 1398-1401 ◽  
Author(s):  
R. Chil ◽  
L. M. Fraile ◽  
J. Vaquero ◽  
E. Picado ◽  
A. Rodriguez-Moreno ◽  
...  
Keyword(s):  
Dosimetry System ◽  
Personal Dosimetry
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