Results 131 to 140 of about 1,440 (170)

Feasibility study for Tehran Research Reactor power upgrading

Annals of Nuclear Energy, 2008
Abstract The present work is concerned with a power upgrading study of Tehran Research Reactor (TRR). The upgrading study is aimed at investigating the possibility of raising power of the TRR from the current level of 5 MW th to a higher level without violating the original thermal-hydraulic safety criteria. The existing core, comprising 22 standard
Kazem Farhadi, Samad Khakshournia
openaire   +1 more source

Calculational tools to conduct experimental optimization in Tehran research reactor

Annals of Nuclear Energy, 1999
Abstract Utilization of irradiation facilities in Tehran research reactor (TRR) requires proper computational tools to deliver accurate and precise results. In this paper validity of different schemes are checked against experimental measurements.
H Khalafi, M Gharib
openaire   +1 more source

Determination of Tehran Research Reactor power by 16N gamma detection

Annals of Nuclear Energy, 2011
Abstract The radioisotope 16 N is produced by the interaction of fast neutrons with 16 O in water reactor coolant. This radioisotope emits at the two major gamma ray energies of 6.13 MeV and 7.1 MeV. Exploiting the linear relation between the number of gamma particles versus the reactor power change, the reactor power is determined by detecting and
Hamid Reza Armozd, Morteza Gharib, Hossein Afarideh, Mitra Ghergherehchi, Azim Ahmadi Niar, Morteza Jafarzadeh   +5 more
openaire   +1 more source

Redesign, construction and commissioning of a powder neutron diffractometer in Tehran research reactor

Annals of Nuclear Energy
E. Bavarnegin, M. Jafarzadeh, Z. Gholamzadeh, R. Ebrahimzadeh, M. Golshanian, B. Rokrok, S.M. Mirvakili, M.Sh. Hosseinipanah, A.H. Tajbakhsh, M. Mehrpour, R. Asgarfar, M. Keyvani, A. Ezati, A. Hosnirokh, A. Shahidi, H. Ghods, M. Ashrafifard, R. Salartash, F. Ameli, A.H. Maleki, H. Abbasi, M. Hosseini, R. Karimi, M. Afshani, E. Asadi   +24 more
exaly   +2 more sources

Thermo-Hydraulic Calculation and Safety Analysis of the Tehran Research Reactor

Volume 3: Thermal Hydraulics; Current Advanced Reactors: Plant Design, Construction, Workforce and Public Acceptance, 2009
The aim of this study is to evaluate the thermal hydraulic parameters such as, Minimum DNBR, fuel, clad and coolant temperatures of the Tehran Research Reactor (TRR) core in order to assure that the thermal limitations are not exceeded at full power and steady-state and the loss-of-flow accident (LOFA) operating conditions and the existing design is ...
JAFARI J, FIRUZJAEE M. K, KHAKSHOURNIA S, SEPANLOO K, D'AURIA, FRANCESCO SAVERIO   +4 more
openaire   +2 more sources

Sensitivity Analysis of Kinetics Parameters of Tehran Research Reactor (TRR)

Volume 5: Fuel Cycle and High and Low Level Waste Management and Decommissioning; Computational Fluid Dynamics (CFD), Neutronics Methods and Coupled Codes; Instrumentation and Control, 2009
In this research, effective delayed neutron fraction (βeff) and neutron generation time (Λ) of the Tehran Research Reactor (TRR) are calculated for different uranium enrichments from 14.84 w/o to 96.56 w/o U235 in two states of the TRR, (cold fuel, clad and coolant temperature of 20 °C; and hot fuel, clad and coolant temperature of 65, 49 and 44 °C ...
Seyed Abolfazl Hosseini, Naser Vosoughi
openaire   +1 more source

Reactor core power measurement using Cherenkov radiation and its application in Tehran Research Reactor

Annals of Nuclear Energy, 2009
Abstract Cherenkov radiation is a process that could be used as an extra channel for power measurement to enhance redundancy and diversity of a reactor. This is especially easy to establish in a pool type research reactor. A simple photo diode array is used in Tehran Research Reactor to measure and display power in parallel with the existing ...
M. Arkani, M. Gharib
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Radiation dose calculations for an accidental release from the Tehran Research Reactor

Nuclear Engineering and Design, 2013
Abstract Radiological consequence analysis is carried out for a postulated accidental airborne radionuclide release from the Tehran Research Reactor (TRR). Using the “Hots pot” computer code, Total Effective Dose Equivalent (TEDE) values to the public for various atmospheric stability classes are calculated as a function of downwind distances.
Nahid Sadeghi, M. Sadrnia, S. Khakshournia   +2 more
openaire   +1 more source

Proposition of innovative and safe design of grid plate for Tehran research reactor

Annals of Nuclear Energy, 2017
Abstract The purpose of this paper is to propose an innovative and safe design of grid plate for Tehran research reactor (TRR) without any reduction in its performance in comparison with the current operation. The new grid plate consisted of two joined cubic with empty walls which are place of fuels and heavy water, respectively.
H.R. Jalali, A.H. Fadaei
openaire   +1 more source

Determination of urgent protective action zone in Tehran research reactors-associated accidents

Nuclear Engineering and Design, 2021
Abstract In accidents leading to the release of radioactive materials into the environment, it is of great importance to determine the urgent protective action zone (UPZ) in the emergency preparedness phase. The present study was conducted to determine the radius of this area for a low-power research reactor, taking into account the worst conditions ...
S.M. Hosseini Pooya, M. Hosseinipanah, R. Adeli   +2 more
openaire   +1 more source