نتایج جستجو برای: mcnpx code
تعداد نتایج: 168222 فیلتر نتایج به سال:
In this work isodose curves are obtained by the use of a new dosimetric algorithm using numerical data from percentage depth dose (PDD) and the maximum absorbed dose profile, calculated by Monte Carlo in a 18 MV LINAC. The software allows reproducing the absorbed dose percentage in the whole irradiated volume quickly and with a good approximation. To validate results an 18 MV LINAC with a whole...
The Institute for Radiological Protection and Nuclear Safety (IRSN) has developed a new spectrometry system for neutron energies from 10−9 MeV to 10 GeV. This high energy range multisphere extended IRSN system (HERMEIS) is a high gas pressure3He-based Bonner spheres set. It is adapted to low neutron fluence rate measurements and one of its main application concerns the determination of cosmic-r...
At the Neutron Calibration Laboratory (LCN) of IPEN/CNEN, a 241AmBe source was used to test and calibrate neutron detectors. The neutrons emitted by reach detector as intended, but they also scatter undesirably from building's floor, ceiling, walls, leading indirect detection. A Long Counter (LC) modeled using MCNPX Monte Carlo code. objective this study measure contribution scattered radiation...
سازمان های قانون گذار صنعت دریانوردی، سالهای زیادی سعی خویش را در جهت بهبود این صنعت، از طریق ارائه استانداردهای فنی، کاربرد تکنولوژی های جدید و تصویب قوانین بین المللی مرتبط با این استانداردها و تکنولوژی ها صرف نمودند. بررسی سوانح دریایی نشان داد که عامل انسانی سهم عمده ای از دلایل وقوع حوادث ناگوار دریایی می باشد. imo از سال 1998 در راستای پیشگیری از خطای انسانی در کشتی های کنوانسیونی، استقرا...
in this work, we had examined 7 different types of neutron sources -an isotropic point source, sending 14.1(mev) monoenergetic neutrons ,an spherical source with 30 micron radius sending 14.1 (mev) monoenergetic neutrons, and a 30 micron radius spherical source having gaussian fusion energy spectrum from a d-t fusion, with different bandwidths -1,10,50,100 and 1000 kev and investigated 5 differ...
In the last decade, several studies have concluded that elevated concentrations of radon gas in soil or groundwater could be the sign of an imminent earthquake. It is believed that in case of sudden movement of rocks before earthquake, radon is released from the depth of ground and reached the surface. In this way, by measuring Radon concentration change, earthquake prediction is possible. In t...
In the recent years some studies has been done to consider the capability of Tehran Research Reactor for Boron neutron capture therapy (BNCT). The purpose of this study is to evaluate the sensitive organs dose during the treatment of patient with deep brain tumor by TRR. The calculation has been carried out using the Monte Carlo code MCNPX for ZUBAL head and neck phantom. The method was tested ...
The present work describes the methodology for predicting the behavior of extrapolation curves obtained in radionuclide standardization by 4pb-g coincidence measurements, applied to Na, developed at the Laboratório de Metrologia Nuclear of IPEN-CNEN/SP (LMN–Nuclear Metrology Laboratory). The LMN system consists of a proportional counter (PC) in 4p geometry coupled to a single or a pair of NaI(T...
Nuclear power production can benefit from the development of more comprehensive alternatives for dealing with long-term radioactive waste. One such alternative is an accelerator-driven subcritical reactor (ADSR) which has been proposed for both energy production and for burning radioactive waste. Here we investigate the effects of the size of the ADSR spallation target on the total neutron yiel...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید