Abstract
Basic data necessary for the localization of a leak in the internal wall of the containment are presented by studying the sound generated by gas jets coming out of (leaking fissures) as well as propagation in a guided medium. The results acquired have led us to choose the simple intercorrelation method and the matched filed processing method, both of which are likely to adequately handle our problems. Whereas the intercorrelation method appears to be limited in scope when dealing in the guided medium, the matched field processing is suited to leak localization over a surface of approximately 1000 m{sup 2} (for a total surface of 10 000 m{sup 2}). Preliminary studies on the leak signal and on replicated signals have led us to limit the frequency band to 2600 - 3000 Hz. We have succeeded in locating a leak situated in an ordinary position with a minimum amount of replicated signals and basic data. We have improved on the estimation of Bartlett and MVDE (minimum variance distortion less filter) rendering them even more effective. Afterwards, we considered the severe accident situation and showed that the system can be installed in situ. (author) 88 refs.
Citation Formats
Thomann, F.
Localization of a sound source in in a guided medium and reverberating field. Contribution to a study on leak localization in the internal wall of containment of a nuclear reactor in the case of a severe reactor accident; Localisation d`une source acoustique en milieu guide et champ reverberant. Contribution a l`etude sur la localisation de fuite de l`enceinte de confinement d`une centrale nucleaire en situation accidentelle grave.
France: N. p.,
1996.
Web.
Thomann, F.
Localization of a sound source in in a guided medium and reverberating field. Contribution to a study on leak localization in the internal wall of containment of a nuclear reactor in the case of a severe reactor accident; Localisation d`une source acoustique en milieu guide et champ reverberant. Contribution a l`etude sur la localisation de fuite de l`enceinte de confinement d`une centrale nucleaire en situation accidentelle grave.
France.
Thomann, F.
1996.
"Localization of a sound source in in a guided medium and reverberating field. Contribution to a study on leak localization in the internal wall of containment of a nuclear reactor in the case of a severe reactor accident; Localisation d`une source acoustique en milieu guide et champ reverberant. Contribution a l`etude sur la localisation de fuite de l`enceinte de confinement d`une centrale nucleaire en situation accidentelle grave."
France.
@misc{etde_668990,
title = {Localization of a sound source in in a guided medium and reverberating field. Contribution to a study on leak localization in the internal wall of containment of a nuclear reactor in the case of a severe reactor accident; Localisation d`une source acoustique en milieu guide et champ reverberant. Contribution a l`etude sur la localisation de fuite de l`enceinte de confinement d`une centrale nucleaire en situation accidentelle grave}
author = {Thomann, F}
abstractNote = {Basic data necessary for the localization of a leak in the internal wall of the containment are presented by studying the sound generated by gas jets coming out of (leaking fissures) as well as propagation in a guided medium. The results acquired have led us to choose the simple intercorrelation method and the matched filed processing method, both of which are likely to adequately handle our problems. Whereas the intercorrelation method appears to be limited in scope when dealing in the guided medium, the matched field processing is suited to leak localization over a surface of approximately 1000 m{sup 2} (for a total surface of 10 000 m{sup 2}). Preliminary studies on the leak signal and on replicated signals have led us to limit the frequency band to 2600 - 3000 Hz. We have succeeded in locating a leak situated in an ordinary position with a minimum amount of replicated signals and basic data. We have improved on the estimation of Bartlett and MVDE (minimum variance distortion less filter) rendering them even more effective. Afterwards, we considered the severe accident situation and showed that the system can be installed in situ. (author) 88 refs.}
place = {France}
year = {1996}
month = {Nov}
}
title = {Localization of a sound source in in a guided medium and reverberating field. Contribution to a study on leak localization in the internal wall of containment of a nuclear reactor in the case of a severe reactor accident; Localisation d`une source acoustique en milieu guide et champ reverberant. Contribution a l`etude sur la localisation de fuite de l`enceinte de confinement d`une centrale nucleaire en situation accidentelle grave}
author = {Thomann, F}
abstractNote = {Basic data necessary for the localization of a leak in the internal wall of the containment are presented by studying the sound generated by gas jets coming out of (leaking fissures) as well as propagation in a guided medium. The results acquired have led us to choose the simple intercorrelation method and the matched filed processing method, both of which are likely to adequately handle our problems. Whereas the intercorrelation method appears to be limited in scope when dealing in the guided medium, the matched field processing is suited to leak localization over a surface of approximately 1000 m{sup 2} (for a total surface of 10 000 m{sup 2}). Preliminary studies on the leak signal and on replicated signals have led us to limit the frequency band to 2600 - 3000 Hz. We have succeeded in locating a leak situated in an ordinary position with a minimum amount of replicated signals and basic data. We have improved on the estimation of Bartlett and MVDE (minimum variance distortion less filter) rendering them even more effective. Afterwards, we considered the severe accident situation and showed that the system can be installed in situ. (author) 88 refs.}
place = {France}
year = {1996}
month = {Nov}
}