ASSESSMENT OF NEUTRON HP(10) USING WORKPLACE CORRECTION FACTORS OBTAINED THROUGH MONTE CARLO SIMULATION FOR ALNOR ALBEDO DOSEMETER. 2022

Max S Ferreira, and Everton R Silva, and Claudia L P Mauricio
Instituto de Radioproteção e Dosimetria, Comissão Nacional de Energia Nuclear, Rio de Janeiro, RJ, Brazil.

Albedo dosemeters for neutron individual monitoring are used worldwide and their response to the same dose can vary by more than one order of magnitude, depending on the neutron workplace spectrum. Two-component albedo dosemeters use two pairs of TLDs, one pair to measure incident neutrons (i) and another to measure albedo neutrons (a), used to corrections to the neutron HP(10). A Workplace Correction Factor (WCF) as a function of the i/a ratio can be plotted from experimental or simulated measurements. This paper uses a Monte Carlo MCNPX simulation of the Alnor albedo dosemeter response to plot WCF × i/a curves for several neutron fields. Experimental results were used to validate the simulation. The use of the proposed curves to calculate WCF can reduce the inaccuracies of the neutron dose assessment for different neutron fields of several facilities. However, it is necessary to be careful with the uncertainties of the i/a values.

UI MeSH Term Description Entries
D009010 Monte Carlo Method In statistics, a technique for numerically approximating the solution of a mathematical problem by studying the distribution of some random variable, often generated by a computer. The name alludes to the randomness characteristic of the games of chance played at the gambling casinos in Monte Carlo. (From Random House Unabridged Dictionary, 2d ed, 1993) Method, Monte Carlo
D009502 Neutrons Electrically neutral elementary particles found in all atomic nuclei except light hydrogen; the mass is equal to that of the proton and electron combined and they are unstable when isolated from the nucleus, undergoing beta decay. Slow, thermal, epithermal, and fast neutrons refer to the energy levels with which the neutrons are ejected from heavier nuclei during their decay. Neutron
D011829 Radiation Dosage The amount of radiation energy that is deposited in a unit mass of material, such as tissues of plants or animal. In RADIOTHERAPY, radiation dosage is expressed in gray units (Gy). In RADIOLOGIC HEALTH, the dosage is expressed by the product of absorbed dose (Gy) and quality factor (a function of linear energy transfer), and is called radiation dose equivalent in sievert units (Sv). Sievert Units,Dosage, Radiation,Gray Units,Gy Radiation,Sv Radiation Dose Equivalent,Dosages, Radiation,Radiation Dosages,Units, Gray,Units, Sievert
D011834 Radiation Monitoring The observation, either continuously or at intervals, of the levels of radiation in a given area, generally for the purpose of assuring that they have not exceeded prescribed amounts or, in case of radiation already present in the area, assuring that the levels have returned to those meeting acceptable safety standards. Monitoring, Radiation
D011835 Radiation Protection Methods and practices adopted to protect against RADIATION. Protection, Radiation
D004867 Equipment Design Methods and patterns of fabricating machines and related hardware. Design, Equipment,Device Design,Medical Device Design,Design, Medical Device,Designs, Medical Device,Device Design, Medical,Device Designs, Medical,Medical Device Designs,Design, Device,Designs, Device,Designs, Equipment,Device Designs,Equipment Designs
D016273 Occupational Exposure The exposure to potentially harmful chemical, physical, or biological agents that occurs as a result of one's occupation. Exposure, Occupational,Exposures, Occupational,Occupational Exposures
D017132 Workplace Place or physical location of work or employment. Job Site,Work Location,Work Place,Work-Site,Worksite,Job Sites,Location, Work,Work Locations,Work Places,Work Site,Work-Sites,Workplaces,Worksites

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