Radiant energy – Invisible radiant energy responsive electric signalling – Neutron responsive means
Patent
1996-08-12
1997-12-30
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Neutron responsive means
25039005, 2504731, G01N 23204, G01N 23202
Patent
active
057033714
ABSTRACT:
A neutron radiography camera operates in cooperation with a neutron beam source for determining hydrogen content of irradiated BWR fuel elements. The camera implements the method using a notched neutron spectrum filter to determine the hydrogen content. The camera is specifically configured to take advantage of the tubular geometry of a nuclear fuel rod. Incident neutron beam ports are formed in a base unit that receives an incident filtered neutron beam. The ports aim the neutron beam at a periphery of the BWR fuel elements, which in the context of nuclear fuel rods includes zirconium alloy cladding. Collision of the neutrons with hydrogen in the cladding lowers their energy and scatters them at preferential angles. Scatter cavities defining scattered neutron paths are formed in the base unit, and absorber plates are disposed of terminal ends of the scatter cavities. The absorber plates become activated by resonance absorption from the neutrons scattered by hydrogen in the target fuel elements. The hydrogen content can be determined from the activated absorber plates.
REFERENCES:
patent: 3742367 (1973-06-01), Grossman
patent: 5192491 (1993-03-01), Schulz
A. Zeilinger and W. A. Pochman, "Neutron radiographic measurement of the diffusion of H in .beta.-Ti, V, Nb and Ta" J. Phys. F: Metal Phys., vol. 7, No. 4, (1977) pp. 575-583, Apr. 19, 1977.
Nuclear Technology, "Detection of Parts-per-Million Levels of Hydrogen in Solids Using a Modified Notched Neutron Spectrum Technique," W. H. Miller, L. Lin, R. M. Brugger and W. Meyer, vol. 99, p. 252, 1992, (Aug.).
Transactions of the American Nuclear Society, "Determination of Zirconium Hydriding in Nuclear Fuel Pins Utilizing the Notched Neutron Spectrum Technique, " William H. Miller, David M. Farkas and Daniel R. Lutz, Jan. 12, 1996.
Farkas David Michael
Lutz Daniel Reese
General Electric Company
Hannaher Constantine
LandOfFree
Modified notched energy filter neutron radiography camera for no does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Modified notched energy filter neutron radiography camera for no, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modified notched energy filter neutron radiography camera for no will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-204955