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AbstractAbstract
[en] The design of a remotely-operated ultrasonic leak detector is described. The detector is basically an ultrasonic microphone with parabolic reflector, amplifier, stepping motors to move the microphone, and a display unit. (E.C.B.)
Source
Atomic Energy of Canada Ltd., Chalk River, Ontario. Chalk River Nuclear Labs; p. 42-45; Spr 1978; p. 42-45
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AbstractAbstract
[en] A multichannel leak detection system has been developed to detect any chemical leak during the electrochemical etching process. It gives an audible and a visible warning when there is a leak at any part of the system. This greatly helps in isolating the defective sample quickly. It can be removed during operation, while the etching process continues on other samples. The circuit is built from standard integrated circuits and has its own power supply. Provisions have been made to connect this system to the computer for recording date, time and location of the leaky unetched samples. (author)
Source
14. international conference on solid state nuclear track detectors; Lahore (Pakistan); 2-6 Apr 1988
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Journal Article
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Conference
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Giroux, J.
CEA, 75 - Paris (France)1989
CEA, 75 - Paris (France)1989
AbstractAbstract
[en] The volume of a cavity, such as a cylinder and a piston, connected to the enclosure (glovebox or reactor containment shell) is varied to find back the previous pressure difference with the outside (positive or negative). Thermometers and a barometer are provided for eventual corrections
[fr]
La mesure consiste a faire varier le volume d'une cavite communiquant avec l'enceinte des boites a gants ou des enceintes de reacteurs pour retrouver la valeur primitive d'une difference de pression entre l'enceinte et l'exterieur. Des thermometres et un barometre permettent d'integrer les variations des parametres exterieurs a la mesureOriginal Title
Procede et dispositif de mesure du debit de fuite d'une enceinte de confinement
Primary Subject
Source
20 Oct 1989; 15 Apr 1988; 6 p; FR PATENT DOCUMENT 2630212/A/; FR PATENT APPLICATION 8805014; Available from Institut National de la Propriete Industrielle, Paris (France); Application date: 15 Apr 1988
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Patent
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AbstractAbstract
[en] In this work a short overview is given of the different leakage search methods and the main functions (main current, inverse current) of modern helium leak indicators as well as several example for application are presented. (orig./HP)
[de]
Der Beitrag gibt einen kurzen Ueberblick ueber verschiedene Lecksuchmethoden und stellt die Funktionsprinzipien (Hauptstrom, Gegenstrom) moderner Helium-Leckdetektoren sowie einige Anwendungsbeispiele vor. (orig./HP)Original Title
Dichtheitspruefung mit Helium-Lecksuchern
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Journal Article
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Blanc, P.; Levallet, H.; Brachet, Y.; Meyer, P.
CEA, 75 - Paris (France)1991
CEA, 75 - Paris (France)1991
AbstractAbstract
[en] The container for fissile materials, such as plutonium oxides or highly enriched uranium, comprises a closure device allowing leak testing. Tightness is obtained with two concentric O rings. Leaks are detected in the space between the two seals
[fr]
L'emballage pour oxydes de plutonium ou uranium tres enrichi, est equipe d'un dispositif de fermeture permettant d'effectuer des controles d'etancheite. L'etancheite entre le bouchon et la bride est assuree par deux joints d'etancheite concentriques. Les fuites sont controlees grace a un espace menage entre les deux joints et relie a un bouchon de controleOriginal Title
Emballage d'entreposage et de transport de matieres fissiles
Primary Subject
Source
18 Jan 1991; 17 Jul 1989; 12 p; FR PATENT DOCUMENT 2649824/A/; FR PATENT APPLICATION 8909582; Available from Institut National de la Propriete Industrielle, Paris (France); Application date: 17 Jul 1989
Record Type
Patent
Country of publication
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INIS VolumeINIS Volume
INIS IssueINIS Issue
Kenchington, J.M.; Ellis, P.J.; Meranda, D.G.
Proceedings of the Canadian Nuclear Society 8. annual conference1987
Proceedings of the Canadian Nuclear Society 8. annual conference1987
AbstractAbstract
[en] The development of leak detection monitoring by the Annulus Gas System (AGS) for the Ontario Hydro Nuclear Stations over the last several years is reviewed. Verified models were used to modify the AGS and provide the operators with safe operating limits. The current AGS design gives the operator an adequate warning to take timely action and if needed to shutdown the reactor safely in a controlled fashion
Primary Subject
Source
Canadian Nuclear Society, Toronto, ON (Canada); 483 p; 1987; p. 425-432; Canadian Nuclear Society 8. annual conference; Saint John, NB (Canada); 16-17 Jun 1987
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Miscellaneous
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AbstractAbstract
[en] Published in summary form only
Original Title
Resonancias no orbitron: um detetor de vazamento de vacuo
Source
Almeida Fonseca, A.L. de (Brasilia Univ., DF (Brazil)); Koiler, B. (Pontificia Univ. Catolica do Rio de Janeiro, RJ (Brazil)); Brescansin, L.M. (Universidade Estadual de Campinas, SP (Brazil)) (and others); Sociedade Brasileira de Fisica, Rio de Janeiro, RJ (Brazil); 284 p; 1990; p. 98; 13. National Meeting on Condensed Matter Physics; Caxambu, MG (Brazil); 8-12 May 1990; Available from the Library of the Comissao Nacional de Energia Nuclear, RJ, Brazil
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Miscellaneous
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AbstractAbstract
[en] The main patent application concerns a composite material that may be used for detecting liquid metal leakages. This material includes a fabric of refractory mineral and electrically insulating threads in which electric conducting wires are inserted at regular intervals and electrically insulated with respected to the outside surfaces of the materials. More precisely, the electric conducting wires are preferably arranged in parallel to the warp of the fabric. According to a particular fabrication method, the substance concerned can be constituted of a stack of layers comprising a central layer of a web of insulating threads in which electric conducting wires are buried at regular intervals. This central layer is placed between at least two external layers made of a refractory and electrically insulating mineral thread fabric
[fr]
La demande de brevet principal a pour objet un materiau composite utilisable pour la detection de fuites d'un metal liquide. Ce materiau comprend un tissu de fils mineraux refractaires et electriquement isolants dans lequel sont inseres, a intervalles reguliers, des fils electriquement conducteurs, isoles electriquement par rapport aux surfaces externes du materiau. De facon plus precise, les fils electriquement conducteurs sont disposes de preference dans le sens de la chaine du tissu. Selon un mode de realisation particulier, le materiau considere peut etre constitue par un empilement de couches comprenant une couche centrale d'un tissu de fils isolants dans lequel sont noyes, a intervalles reguliers, des fils electriquement conducteurs, cette couche centrale etant comprise enre au moins deux couches externes constituees d'un tissu de fils mineraux, refractaires et electriquement isolantsOriginal Title
Perfectionnement aux materiaux composites utilisables pour la detection de fuites d'un metal liquide
Primary Subject
Source
28 Nov 1980; 18 p; FR PATENT DOCUMENT 2455739/A/; Available from Institut National de la Propriete Industrielle, Paris (France)
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Patent
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AbstractAbstract
[en] A system is disclosed for detecting small leaks at low pressures in hermetically sealed units that includes a first flow circuit for connecting a test unit to a source of pressurized gas (air) to place the unit at a desired test pressure. The gas (air) is then rerouted through a second flow circuit containing a bubble chamber so that in the event of a leak, a stream of bubbles are produced in a liquid. The presence of bubbles in the liquid is detected by a doppler radar which provides an alarm signal in response thereto. The mass displacement of the bubbles within the liquid is controlled and the time period between bubbles is sensed to provide sufficient data to quantify the leak rate
Source
13 Dec 1983; v p; US PATENT DOCUMENT 4,419,883/A/; U.S. Commissioner of Patents, Washington, D.C. 20231, USA, $.50; PAT-APPL-353609.
Record Type
Patent
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Improved analyzer for determining helium-4 in parts-per-billion range. Report of Investigations/1986
Seitz, C.A.; Holland, P.W.
Bureau of Mines, Amarillo, TX (USA). Helium Field Operations1986
Bureau of Mines, Amarillo, TX (USA). Helium Field Operations1986
AbstractAbstract
[en] The Bureu of Mines has modified its parts-per-billion helium-4 analyzer to improve the analytical capabilities of the instrument. The modifications resulted in the following improvements: (1) the analytical precision of the instrument for 10 consecutive analyses was improved to + or - ppb at the 5000 ppb helium-4 level, (2) the helium-4 sensitivity was increased almost tenfold, and (3) the minimum detectable limit for helium-4 was improved to 0.5 ppb. The modifications made to improve the instrument included replacing the ion-source control circuit with a direct-current solid-state design, controlling the temperature of the ion source, stabilizing and reducing the pumping rate of the vacuum system, and optimizing peak integration
Primary Subject
Source
1986; 14 p; BM-RI--9010; Available from NTIS, PC A02/MF A01
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