Balanced bright and dark field illumination for remote visual testing to detect cracks on pressure vessel of nuclear reactors

2021 ◽  
Author(s):  
Takeshi Shimano ◽  
Keiichi Betsui
Keyword(s):  
Pressure Vessel ◽  
Nuclear Reactors ◽  
Dark Field ◽  
Dark Field Illumination ◽  
Visual Testing

scholarly journals Dark-field microscopy enhance visibility of CD31 endothelial staining

2020 ◽  
Vol 64 (3) ◽  
Author(s):  
Eva Jennische ◽  
Stefan Lange ◽  
Ragnar Hultborn
Keyword(s):  
Phase Contrast ◽  
Scattered Light ◽  
Dark Field ◽  
Light Scatter ◽  
Endothelial Lining ◽  
Microscopy Technique ◽  
Dark Field Microscopy ◽  
Dark Field Illumination ◽  
Normal Human ◽  
Intense Light

A simple dark field microscopy technique was used for visualization of blood vessels in normal human renal tissues and carcinoma. Phase contrast condenser ring apt for high power objectives was combined with a 10x objective in order to create a dark field illumination of the specimens examined. The endothelial lining of the vessels had been stained by using CD31 monoclonal antibodies combined with conventional peroxidase immunohistochemistry. The final DAB addition used for this technique induced an intense light scatter in the dark field microscope. This scattered light originating from the endothelial lining made the walls of the bright vessels easily detectable from the dark background.

Manipulation of Nanoparticles Using Dark-Field-Illumination Optical Tweezers with Compensating Spherical Aberration

2009 ◽  
Vol 26 (6) ◽  
pp. 068701 ◽  
Author(s):  
Zhou Jin-Hua ◽  
Tao Run-Zhe ◽  
Hu Zhi-Bin ◽  
Zhong Min-Cheng ◽  
Wang Zi-Qiang ◽  
...  
Keyword(s):  
Optical Tweezers ◽  
Spherical Aberration ◽  
Dark Field ◽  
Dark Field Illumination

Fluid Flow Field in the Annulus of Boiling Water (BWR) Nuclear Reactors Under Normal and Accident Conditions

2009 ◽  
Author(s):  
Raju Ananth ◽  
Karen Fujikawa ◽  
Jay Gillis
Keyword(s):  
Fluid Flow ◽  
Velocity Field ◽  
Flow Field ◽  
Pressure Vessel ◽  
Theoretical Study ◽  
Nuclear Reactors ◽  
Boiling Water ◽  
Flow Conditions ◽  
Accident Conditions ◽  
Reactor Pressure

This paper presents a theoretical study of the velocity field in the annulus formed between the Reactor Pressure Vessel (RPV) and the shroud of a Boiling Water Reactor (BWR) under normal and accident flow conditions. Simplified geometry and an ideal irrotational flow are assumed to solve the problem using velocity potentials.

A search for apatite crystals in the gap zone of collagen fibrils in bone using dark-field illumination

Bone ◽  
2020 ◽  
Vol 135 ◽  
pp. 115304 ◽  
Author(s):  
H.P. Schwarcz ◽  
D.M. Binkley ◽  
L. Luo ◽  
K. Grandfield
Keyword(s):  
Dark Field ◽  
Collagen Fibrils ◽  
Apatite Crystals ◽  
Dark Field Illumination
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