Measurement of Neutron and Gamma Spatial Distribution in Radial Channel at VR1 Reactor

2010 ◽  
Author(s):  
Marija Miletic´
Keyword(s):  
Spatial Distribution ◽  
Research Reactor ◽  
Radiation Detection ◽  
Theoretical Description ◽  
Spatial Distributions ◽  
Mcnp Code ◽  
Radial Channel ◽  
Line Measurement ◽  
On Line ◽  
Practical Measurement

This work gives the theoretical description with a practical measurement of neutron and gamma spatial distributions in a radial experimental channel (RC) at VR1 research reactor. For providing the measurements an “off-line” and “on-line” methods were used. The “on-line” measurement of neutron spatial distribution was performed with a 3He gas filled detector. From the “off-line” measurements Neutron Activation method (for neutron detection) and Thermoluminescent method (for gamma radiation detection) were chosen. Results obtained from experiments were compared with the results from MCNP code.

Research Reactor VR-1 and Determination of Neutron Spatial Distribution in Its Radial Experimental Channel

2009 ◽  
Author(s):  
Marija Mileticˇ
Keyword(s):  
Spatial Distribution ◽  
Neutron Flux ◽  
Flux Density ◽  
Research Reactor ◽  
Reactor Power ◽  
Activation Detector ◽  
Experimental Channel ◽  
Neutron Flux Density ◽  
Radial Channel

The research reactor VR-1 is operated by Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University (CTU) in Prague. It is a pool-type, light-water reactor, with low enriched uranium. Maximum thermal power is 1kW (equal to 1·108 impulses/second when compared with reactors with higher power). Research on VR-1 reactor is mainly used for the education of university students, preparation and testing of new educational methodologies, investigation of reactor lattice parameters, reactor dynamics study, research in the control equipment field, neutron detector calibration, etc. One of the applications performed by students is the determination of the absolute value of the neutron flux density (also known as Neutron Spatial Distribution) in the radial experimental channel in reactor VR-1. The method used for this measurement is Neutron Activation Analysis. The principle of this method consists in neutron capture in a nucleus of the material forming the activation detector which is irradiated in the experimental channel. The activity of the produced radioactive products (radioisotopes) is then measured by means of appropriate counter system (in our case, High Purity Germanium detector). For this measurement totally 34 gold foils were irradiated at different reactor power levels and various positions in radial channel in aim to determine the neutron spatial distribution in radial channel. Interesting results about symmetry, value and dependence on reactor power level of neutron flux density were obtained.

scholarly journals On Line Measurement of Reactivity Worth of TRIGA Mark-II Research Reactor Control Rods

2011 ◽  
Vol 02 (09) ◽  
pp. 1024-1029 ◽  
Author(s):  
Nusrat Jahan ◽  
Mamunur M. Rashid ◽  
F. Ahmed ◽  
M. G. S. Islam ◽  
M. Aliuzzaman ◽  
...  
Keyword(s):  
Research Reactor ◽  
Reactor Control ◽  
Line Measurement ◽  
On Line ◽  
Triga Mark Ii ◽  
Control Rods

Thickness Measurement in the AEM by Macintosh-Based Analysis of Two-Beam Convergent Beam Patterns

1990 ◽  
Vol 48 (2) ◽  
pp. 504-505
Author(s):  
John F. Mansfield ◽  
Douglas C. Crawford
Keyword(s):  
Electron Microscope ◽  
Video Camera ◽  
Thickness Measurement ◽  
Specimen Thickness ◽  
Crystalline Materials ◽  
Beam Dynamic ◽  
Line Measurement ◽  
On Line ◽  
Image Position ◽  
Convergent Beam

A method has been developed that allows on-line measurement of the thickness of crystalline materials in the analytical electron microscope. Two-beam convergent beam electron diffraction (CBED) patterns are digitized from a JEOL 2000FX electron microscope into an Apple Macintosh II microcomputer via a Gatan #673 CCD Video Camera and an Imaging Systems Technology Video 1000 frame-capture board. It is necessary to know the lattice parameters of the sample since measurements are made of the spacing of the diffraction discs in order to calibrate the pattern. The sample thickness is calculated from measurements of the spacings of the fringes that are seen in the diffraction discs. This technique was pioneered by Kelly et al, who used the two-beam dynamic theory of MacGillavry relate the deviation parameter (Si) of the ith fringe from the exact Bragg condition to the specimen thickness (t) with the equation:Where ξg, is the extinction distance for that reflection and ni is an integer.

Control Strategies for a Highly Loaded Biological Ammonia Elimination Process

1993 ◽  
Vol 28 (11-12) ◽  
pp. 531-538 ◽  
Author(s):  
B. Teichgräber
Keyword(s):  
Closed Loop ◽  
Control Strategies ◽  
Level Control ◽  
Sludge Dewatering ◽  
Loop Control ◽  
Reject Water ◽  
Line Measurement ◽  
Control Pattern ◽  
On Line ◽  
Treatment Facilities

A nitrification/denitrification process was applied to reject water treatment from sludge dewatering at Bottrop central sludge treatment facilities of the Emschergenossenschaft. On-line monitoring of influent and effluent turbidity, closed loop control of DO and pH, and on-line monitoring of nitrogen compounds were combined to a three level control pattern. Though on-line measurement of substrate and product showed substantial response time it could be used to operate nitrification/denitrification within process boundaries.

On-line measurement of pulverized coal fineness on a 300 MWe power plant with pulsed digital inline holography

2021 ◽  
Author(s):  
Qiwen Jin ◽  
Xijiong Chen ◽  
Pei Li ◽  
Yonggang Zhou ◽  
Yingchun Wu ◽  
...  
Keyword(s):  
Power Plant ◽  
Pulverized Coal ◽  
Line Measurement ◽  
On Line

On-line measurement system of displacement with PSD sensor

2006 ◽  
Author(s):  
Yongcai Yang ◽  
Junsan Ma ◽  
Rimin Pan ◽  
Xiang Yu
Keyword(s):  
Measurement System ◽  
Line Measurement ◽  
On Line ◽  
Psd Sensor
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