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AbstractAbstract
No abstract available
Original Title
1.5-MeV electrons
Primary Subject
Source
1972; 71 p; University Microfilms Order No. 73-15,789.; Thesis (Ph. D.).
Record Type
Report
Literature Type
Thesis/Dissertation
Country of publication
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INIS IssueINIS Issue
AbstractAbstract
[en] In a nuclear power plant there are several systems which are on stand-by position as, for instance, safety systems. These stand-by systems have to be ready to start as soon as any situation for which they have be designed occurs. A test policy is then necessary in order to know the state of such a system and repair the possible failures. The tests are normally performed at regular intervals of time according to a scheduled sequence. We have already shown during the 'IIIeme Congres National de Fiabilite' held in Perros-Guirec in 1976 how it is possible in this case to find the optimum test interval leading to the best mean availability of the system. It is, in fact, possible, to improve that by considering that if the test interval is fixed 'a priori' this does not allow to take into account information we have on the system state every time
[fr]
Il existe au sein des installations nucleaires de nombreux systemes en attente de fonctionnement comme, par exemple, les systemes de sauvegarde. Normalement a l'arret, ces systemes doivent etre prets a demarrer lorsqu'une situation necessitant leur intervention se produit. Pour connaitre l'etat dans lequel il se trouve et reparer ses defaillances eventuelles, un systeme en attente est generalement soumis a une certaine politique de test. Les tests ont habituellement lieu a intervalle regulier selon une 'grille' prevue a l'avance et nous avons montre au cours du IIIeme Congres National de fiabilite qui s'est tenu a Perros-Guirec en 1976 comment il etait possible de trouver l'intervalle entre test optimum permettant d'obtenir la meilleure disponibilite moyenne. On peut en fait faire mieux si on considere qu'un intervalle entre test fixe a priori ne permet pas de tenir compte des informations que l'on a a chaque instant sur le systeme. C'est ce que nous nous proposons de montrer au cours de cette conferenceOriginal Title
Optimisation de la politique de test des systemes en attente de fonctionnement
Primary Subject
Source
Sep 1980; 8 p; International colloquium on reliability and maintenance; Perros-Guirec, France; 8 - 12 Sep 1980
Record Type
Report
Literature Type
Conference
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Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] This report provides a brief description of version 2.0 of the EPRI Decommissioning Economic and Risk Advisor (DERAD) software. The report provides examples of the use of DERAD in systematically analyzing tactical and strategic decommissioning options, including case studies
Primary Subject
Secondary Subject
Source
Sep 1996; 20 p; Available from EPRI Distribution Center, 207 Coggins Drive, PO Box 23205, Pleasant Hill, CA 94523 (United States)
Record Type
Report
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Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The detail signal-to-noise ratio model of radiographic imaging is quantitatively anayzed in terms of its accuracy in describing observer threshold perceptibility of radiographic detail. The model is found to adequately describe the effects of magnification, scatter radiation, and system resolution on observer threshold perceptibility. However, it is shown that the model does not apply in screen/film radiography for very low contrasts and high scatter conditions due to insufficient optical density contrast. The dose-to-information conversion efficiency of a radiographic imaging system is defined and the effect of magnification, scatter, resolution, image processing, detector efficiency, grids, patient table support, field size, and geometry on the dose efficiency of the imaging system are investigated
Primary Subject
Secondary Subject
Record Type
Journal Article
Journal
Medical Physics; ISSN 0094-2405; 
; v. 8(1); p. 24-32
; v. 8(1); p. 24-32
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Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Original Title
X radiation; γ radiation
Primary Subject
Record Type
Journal Article
Journal
Amer. J. Phys. Anthropol; v. 38 p. 325-330
Country of publication
ANIMALS, BEAMS, BIOLOGICAL EFFECTS, BIOLOGICAL RECOVERY, BODY, DISEASES, ELECTROMAGNETIC RADIATION, INJURIES, IONIZING RADIATIONS, LOCAL RADIATION EFFECTS, MAMMALS, MEDICINE, NECROSIS, NUCLEAR MEDICINE, ORGANS, PATHOLOGICAL CHANGES, PLANT DISEASES, PRIMATES, RADIATION EFFECTS, RADIATION INJURIES, RADIATIONS, RADIOLOGY, SKELETAL DISEASES, SKELETON, SKULL, THERAPY, VERTEBRATES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Owing to the fact that environment stresses, that prevail or may occur in a pressurized water reactor containment are very novel and hard, a new test procedure for safety-related equipment had to be devised. Such tests aim at ensuring equipment quality level and checking its fitness for use. This new field led to the development of test facilities in order to reproduce the stresses taken into account such as irradiation or pressure and temperature shocks. At the present time, the various preparation works are drawing to a close and the first test campaign, dealing with safety related cables, is undertaken; the others are planned up to 1981
Primary Subject
Source
Oak Ridge National Lab., TN (USA); p. 502-508; Jun 1980; p. 502-508; ANS thermal reactor safety meeting; Knoxville, TN, USA; 8 - 11 Apr 1980
Record Type
Report
Literature Type
Conference
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Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Carvlin, M.J.; Roberts, D.; Cohen, G.; Quinn, P.; Joseph, P.M.
Radiological Society of North America 73rd scientific assembly and annual meeting (Abstracts)1987
Radiological Society of North America 73rd scientific assembly and annual meeting (Abstracts)1987
AbstractAbstract
[en] Although MR imaging typically shows the meniscus of the temporomandibular joint (TMJ) as a biconcave region of low signal within the joint space, there is a great deal of variability in the MR images of healthy and diseased joints. The authors examined surgically extirpated menisci (n=55), cadaver TMJs (n=16), normal volunteers (n=5), and symptomatic patients (n=25) to identify the important parameters affecting the MR image. The authors found the meniscus has a short T2 (<50 msec), which is shortened further with degenerative changes; short repetition time/echo time (TR/TE) spin-echo images depict morphology well while long TR/TE images provide more information concerning adaptive remodeling of the disc; joint space, disk and condyle relationships are most usefully demonstrated via direct sagittal images; for any given pulse sequence the histopathologic state of the joint is a key determinant of the MR image obtained
Primary Subject
Source
Anon; p. 290; 1987; p. 290; Radiological Society of North America Inc; Oak Brook, IL (USA); 73. scientific assembly and annual meeting of the Radiological Society of North America; Chicago, IL (USA); 29 Nov - 4 Dec 1987
Record Type
Book
Literature Type
Conference
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Source
3. human cytogenetics conference; Sydney, Australia; 16 Mar 1971
Record Type
Journal Article
Literature Type
Conference
Journal
Medical Journal of Australia; v. 2(14); p. 768-771
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Explants of embryonic rat mesencephalon were grown in organotypic culture. Addition of 10 microM 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) to the culture medium for 4 to 7 days resulted in loss of dopamine cell bodies and fiber outgrowths, as observed by fluorescence histochemistry. At the same time, the cultures showed decreased uptake of tritium-labeled dopamine. However, no signs of generalized toxicity were evident when the explant cultures were viewed by light and phase-contrast microscopy. These results show that MPTP exerts a relatively selective destructive action in dopamine neurons in vitro, similar to the action observed in humans and monkeys in vivo. Pargyline (10 microM), a monoamine oxidase inhibitor, protected the dopamine neurons in the explants. Organotypic cultures provide an experimental model for the study of the properties of MPTP in vitro
Primary Subject
Record Type
Journal Article
Journal
Science (Washington, D.C.); ISSN 0036-8075; ; v. 225(4661); p. 529-531
; v. 225(4661); p. 529-531
Country of publication
AMINES, ANIMAL CELLS, ANIMALS, AROMATICS, AZINES, BODY, CARDIOTONICS, CARDIOVASCULAR AGENTS, CENTRAL NERVOUS SYSTEM, DRUGS, HETEROCYCLIC COMPOUNDS, HYDROGEN COMPOUNDS, HYDROXY COMPOUNDS, ISOTOPE APPLICATIONS, MAMMALS, NERVOUS SYSTEM, NEUROREGULATORS, ORGANIC COMPOUNDS, ORGANIC NITROGEN COMPOUNDS, ORGANS, PHENOLS, POLYPHENOLS, RODENTS, SOMATIC CELLS, STEROIDS, SYMPATHOMIMETICS, VERTEBRATES
Reference NumberReference Number
INIS VolumeINIS Volume
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Addes, S.; Herrmann, B.; Cohen, G.; Rabinovitz, E.; Stern, A.
Israel Atomic Energy Commission, Beersheba. Nuclear Research Center-Negev1982
Israel Atomic Energy Commission, Beersheba. Nuclear Research Center-Negev1982
AbstractAbstract
[en] Serious leaks were detected in the inlet and outlet pipes of the heat exchangers in the primary cooling loop of the nuclear reactor in the NRCN. Non-destructive tests were conducted which included: ultrasonic testing, tests with dye penetrants and radiography. The flawed part was replaced and mechanical tests were performed on it. The crack areas of the Inconel-600 tube were examined using optical and scanning electron microscopy. Chemical analysis of both cracked and intact tubes were carried out. It was concluded that stress-corrosion cracking was the main mode of failure, while minor evidence of fatigue was encountered as well. Measures for the prevention of similar failure in the future are suggested. (Author)
Primary Subject
Source
Dec 1982; 38 p
Record Type
Report
Report Number
Country of publication
ALLOYS, CHEMICAL REACTIONS, CHROMIUM ALLOYS, COOLING SYSTEMS, CORROSION, HEAVY WATER COOLED REACTORS, HEAVY WATER MODERATED REACTORS, INCONEL ALLOYS, IRON ALLOYS, MECHANICAL PROPERTIES, NICKEL ALLOYS, NICKEL BASE ALLOYS, NIOBIUM ALLOYS, REACTOR COMPONENTS, REACTOR COOLING SYSTEMS, REACTORS, RESEARCH AND TEST REACTORS, RESEARCH REACTORS, TANK TYPE REACTORS, TRANSITION ELEMENT ALLOYS
Reference NumberReference Number
INIS VolumeINIS Volume
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