Neutron fluence and energy reproducibility of a 2-dollar TRIGA reactor pulse

2009 ◽  
Vol 282 (1) ◽  
pp. 59-62 ◽  
Author(s):  
Rosara F. Payne ◽  
J. A. Drader ◽  
J. I. Friese ◽  
L. R. Greenwood ◽  
C. C. Hines ◽  
...  
Keyword(s):  
Neutron Fluence ◽  
Triga Reactor ◽  
Reactor Pulse

Estimation of the fast neutron fluence in Laguna Verde RPV-Steel specimens simulating their irradiation in a TRIGA reactor

2016 ◽  
Vol 88 ◽  
pp. 264-276 ◽  
Author(s):  
Juan Galicia-Aragón ◽  
Juan Luis François-Lacouture ◽  
Fortunato Aguilar-Hernández
Keyword(s):  
Fast Neutron ◽  
Neutron Fluence ◽  
Triga Reactor ◽  
Rpv Steel ◽  
Laguna Verde

scholarly journals Reactor Pulse Operation for Nuclear Instrumentation Detector Testing – Preparation of a Dedicated Experimental Campaign at the JSI TRIGA Reactor

2021 ◽  
Vol 253 ◽  
pp. 04019
Author(s):  
Vladimir Radulović ◽  
Loïc Barbot ◽  
Grégoire De Izarra ◽  
Julijan Peric ◽  
Igor Lengar
Keyword(s):  
Neutron Flux ◽  
Alternative Energy ◽  
Pulse Operation ◽  
Triga Reactor ◽  
Experimental Campaign ◽  
Nuclear Instrumentation ◽  
Fission Chambers ◽  
Reactor Pulse ◽  
High Neutron ◽  
High Neutron Flux

The availability of neutron fields with a high neutron flux, suitable for irradiation testing of nuclear instrumentation detectors relevant for applications in nuclear facilities such as material testing reactors (MTRs), nuclear power reactors and future fusion reactors is becoming increasingly limited. Over the last several years there has been increased interest in the experimental capabilities of the 250 kW Jožef Stefan Institute (JSI) TRIGA research reactor for such applications, however, the maximal achievable neutron flux in steady-state operation mode falls short of MTR-relevant conditions. The JSI TRIGA reactor can also operate in pulse mode, with a maximal achievable peak power of approximately 1 GW, for a duration of a few ms. A collaboration project between the JSI and the French Atomic and Alternative Energy Commission (CEA) was initiated to investigate absolute neutron flux measurements at very high neutron flux levels in reactor pulse operation. Such measurements will be made possible by special CEA-developed miniature fission chambers and modern data acquisition systems, supported by the JSI TRIGA instrumentation and activation dosimetry. Additionally, measurements of the intensity of Cherenkov light are proposed and being investigated as an alternative experimental method. This paper presents the preparatory activities for an exhaustive experimental campaign, which were carried out in 2019-2020, consisting of test measurements with not fully appropriate fission chambers, activation dosimetry and silicon photomultipliers (SiPMs) The presented results provide useful and promising experimental indications relevant for the design of the experimental campaign.

Annealing Of Radiation Damage in Tungsten

1970 ◽  
Vol 28 ◽  
pp. 412-413
Author(s):  
Robert C. Rau ◽  
John Moteff
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Radiation Damage ◽  
Thermal Annealing ◽  
Neutron Fluence ◽  
Dislocation Loops ◽  
Defect Clusters ◽  
Polycrystalline Tungsten ◽  
Transmission Electron ◽  
Radiation Induced

Transmission electron microscopy has been used to study the thermal annealing of radiation induced defect clusters in polycrystalline tungsten. Specimens were taken from cylindrical tensile bars which had been irradiated to a fast (E > 1 MeV) neutron fluence of 4.2 × 1019 n/cm2 at 70°C, annealed for one hour at various temperatures in argon, and tensile tested at 240°C in helium. Foils from both the unstressed button heads and the reduced areas near the fracture were examined.Figure 1 shows typical microstructures in button head foils. In the unannealed condition, Fig. 1(a), a dispersion of fine dot clusters was present. Annealing at 435°C, Fig. 1(b), produced an apparent slight decrease in cluster concentration, but annealing at 740°C, Fig. 1(C), resulted in a noticeable densification of the clusters. Finally, annealing at 900°C and 1040°C, Figs. 1(d) and (e), caused a definite decrease in cluster concentration and led to the formation of resolvable dislocation loops.

scholarly journals Personal dose equivalent conversion coefficients for neutron fluence over the energy range of 20-250 MeV

2009 ◽  
Vol 138 (3) ◽  
pp. 199-204 ◽  
Author(s):  
R. H. Olsher ◽  
T. D. McLean ◽  
A. L. Justus ◽  
R. T. Devine ◽  
M. S. Gadd
Keyword(s):  
Energy Range ◽  
Neutron Fluence ◽  
Dose Equivalent ◽  
Conversion Coefficients
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