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公开(公告)号：ES2023502B3
公开(公告)日：1992-01-16
申请号：ES88401305
申请日：1988-05-27
Applicant: FRAMATOME SA
Inventor： LE DANTEC OLIVIER
IPC: G21C17/10 , G21C17/108 , G21F9/00 , G21F9/28
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公开(公告)号：DE3863852D1
公开(公告)日：1991-08-29
申请号：DE3863852
申请日：1988-05-27
Applicant: FRAMATOME SA
Inventor： LE DANTEC OLIVIER
IPC: G21C17/10 , G21C17/108 , G21F9/00 , G21F9/28
Abstract: The process involves injecting water into the guide tube (6) from the instrumentation room (10) and generating suction within the guide conduit (8) from the outlet end of this conduit located level with the upper face of the core support plate (5). The suction rate Q2 is higher than the injection rate Q1, the ration of these rates being at least equal to the ratio between the inlet cross-section of the guide conduit (8) and the inner cross-section of the entry sleeve (7) of the guide tube (6). The cleaning device comprises a bell (34) in which the suction is generated and which comes to bear on the upper surface of the support plate (5) via a gasket (35).
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公开(公告)号：FR2746538B1
公开(公告)日：1998-06-12
申请号：FR9603539
申请日：1996-03-21
Applicant: FRAMATOME SA
Inventor： LE DANTEC OLIVIER , GRYPCZYNSKI DANIEL
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公开(公告)号：FR2746538A1
公开(公告)日：1997-09-26
申请号：FR9603539
申请日：1996-03-21
Applicant: FRAMATOME SA
Inventor： LE DANTEC OLIVIER , GRYPCZYNSKI DANIEL
Abstract: Before lifting the upper reactor internals (5) out of the reactor tank (1), a rod (17) carrying a wave emitter-receiver (18) at its lower end is introduced into a guide tube (13a). After lifting the upper internals a short specified distance, the emitter-receiver is activated to emit waves towards the internal surface of the tank, and rotated about a vertical axis. The waves reflected by the core envelope (16) or by any obstacle are received, and the reflected signal is analysed to determine the presence of obstacles such as fuel assemblies (15) or control clusters hooked underneath the upper internals.
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