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Lecompte, J.-C.; Buisson, J.
CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France). Services d'Electronique1978
CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France). Services d'Electronique1978
AbstractAbstract
[en] An electro-magnetic perturbation gives a current flowing on the screens of an equipment. The perturbations is simulated by a sinuoisal current 'I' flowing on the screens; a signal is observed at the input of the control channel amplifier. The ratio between the signal and the flowing current is measured. In that purpose two methods are used: a) synchronous sampling and successive summations. The e/I ratio is measured ('e' is the voltage at the input of the amplifier). b) Spectral analysis of the signal with a very narrow-band filter. Thus the quantity A=20 log I/i is obtained directly ('i' is the current at the input of the amplifier) A is the attenuation factor of the equipment for the perturbating current. This factor is interesting because it includes also the characteristic impedance of the equipment
[fr]
Une perturbation electromagnetique sur une installation se traduit par l'apparition d'un courant de circulation sur le blindage de l'installation. On simule la perturbation en faisant circuler un courant 'I' sinusoidal sur le blindage. Il en resulte un signal a l'entree de l'amplificateur de la chaine de controle. On mesure le rapport entre ce signal et le courant de circulation 'I'. Pour cela on dispose de deux methodes: a) par echantillonnages synchrones et sommations successives. Cette methode permet la mesure de e/I, 'e' etant la tension a l'entree de l'amplificateur. b) Par analyse spectrale du signal avec un filtre a bande tres etroite. Cette methode donne directement la quantite A=20 log I/i 'i' etant le courant a l'entree de l'amplificateur A est alors attenuation de l'installation vis-a-vis des courants de perturbation. Cette derniere grandeur presente l'avantage d'inclure l'impedance caracteristique de l'installationOriginal Title
Mesures de la sensibilite aux perturbations electriques des installations de controle neutronique sur les centrales nucleaires
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Source
1 Feb 1978; 10 p; Specialists meeting of NPCCI electronic equipment to achieve electromagnetic comptability (EEMC); Winfrith, UK; 28 Feb - 2 Mar 1978
Record Type
Report
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Conference
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