Radiological Assessment of Atmospheric Release from Tehran Research Reactor during Normal Operation by Using Pc-Cream Code

In this work, radiological assessment of atmospheric release from Tehran’s Research Reactor (TRR) stack and assessment of public exposures under normal operation has been studied. To perform tasks mentioned above, Pc-Cream computer code which simulates Gaussian Dispersion air transport plume model as well as laboratory analysis of the soil and leaves samples and TLD (Thermo Luminescent Dosimeter) monitoring around the TRR site was used. Results of the Pc-Cream code showed that the annual committed and external dose received by the individual in the vicinity of the reactor is below the regulatory limit. Also, the results of laboratory analysis of available radionuclides in the soil and leaves samples showed that the concentrations are close to the background (K40=635, Th232=28, Cs137=0.29 up to 28.82, Ra226=25 (Bq[1]/Kg) in soil and K40=457, Be7≈70 (Bq/Kg) in leaves) and confirm the code results. The monitored dose values of the TLD detectors were positioned around the reactor within 500 m radius shows that the background dose in vicinity of TRR (113 μSv up to 150 μSv) is consistent with the background dose in Tehran province (125 μSv).

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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 ◽

10.1115/icone17-75523 ◽

2009 ◽

Author(s):

Seyed Abolfazl Hosseini ◽

Naser Vosoughi

Keyword(s):

Generation Time ◽

Research Reactor ◽

Fission Cross Section ◽

Computer Code ◽

Coolant Temperature ◽

Neutron Generation ◽

Kinetics Parameters ◽

Neutron Fission ◽

Tehran Research Reactor ◽

Variation Rate

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, respectively) using the MTR_PC computer code. Comparative analysis shows that both βeff and Λ increase as fuel enrichment decreases. However, variation rate of βeff is not the same in two conditions. βeff in the hot state is larger than those calculated in the cold state when fuel enrichment goes more than 83.91%, while the situation is reverse for enrichment less than that. The obtained neutron generation time shows normal behavior for all different fuel enrichments. The variables involved in kinetics parameters calculations (i.e., neutron fission cross section, fuel enrichment, etc.) are investigated theoretically to confirm the results of calculations in cold and hot states. Variations of βeff and Λ with fuel burnup are studied too.

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Simulation of radionuclide atmospheric dispersion and dose assessment for inhabitants of Tehran province after a hypothetical accident of the Tehran Research Reactor

Radiation and Environmental Biophysics ◽

10.1007/s00411-018-0761-6 ◽

2018 ◽

Vol 58 (1) ◽

pp. 119-128 ◽

Cited By ~ 2

Author(s):

R. Vali ◽

M. E. Adelikhah ◽

S. A. H. Feghhi ◽

O. Noorikalkhoran ◽

R. Ahangari

Keyword(s):

Research Reactor ◽

Atmospheric Dispersion ◽

Dose Assessment ◽

Tehran Research Reactor ◽

Hypothetical Accident ◽

Tehran Province

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Inspection of domestic nuclear fuel rods using neutron radiography at the Tehran Research Reactor

Materials Testing ◽

10.3139/120.110923 ◽

2016 ◽

Vol 58 (9) ◽

pp. 763-766 ◽

Cited By ~ 2

Author(s):

Mohammad Hosein Choopan Dastjerdi ◽

Hossein Khalafi ◽

Yaser Kasesaz ◽

Amir Movafeghi

Keyword(s):

Nuclear Fuel ◽

Research Reactor ◽

Neutron Radiography ◽

Fuel Rods ◽

Tehran Research Reactor ◽

Nuclear Fuel Rods

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USA–Iran, 2009–2010

10.1093/oso/9780199696475.003.0009 ◽

2018 ◽

Author(s):

Nicholas J. Wheeler

Keyword(s):

Nuclear Fuel ◽

Research Reactor ◽

Interpersonal Trust ◽

Obama Administration ◽

Face To Face ◽

Tehran Research Reactor

This chapter examines the attempts by the first Obama Administration to reach out to Iran in an effort to build trust. It traces the failure of Obama’s diplomatic efforts to secure any reciprocation from Iranian leaders. The lack of reciprocation shows the problem of accurate signal interpretation when there is no trust. It focuses on the negotiations in 2009–10 over limiting Iran’s supply of nuclear fuel in return for refuelling the Tehran Research Reactor. The chapter argues these negotiations failed because of the lack of trust. What makes this case so important is that there was no face-to-face interaction, which this book argues is critical to the development of interpersonal trust and accurate signal interpretation.

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