The invention relates to a device for performing a leak test on a fuel rod capsule, which contains at least one fuel rod and test gas, which device comprises a test container, which is designed to accommodate at least one fuel rod capsule and can be lowered into a pool of a nuclear plant flooded with water. According to the invention, a mass spectrometer is fluidically connected to the interior of the test container in such a way that a gas flow can be fed to the mass spectrometer in order to sense the concentration of the test gas that has diffused into the test container from the fuel rod capsule.

A device for quantitatively detecting a leak of a gas of interest including a suction pipe having an upstream suction inlet intended to be brought into the vicinity of a region within which a leak is to be detected, a ventilation apparatus generating a gas stream in the suction pipe having a flow rate greater than 300 m3/H circulating from the upstream suction inlet to the downstream of the pipe, and downstream of the ventilation apparatus, a sampling member.

A leak detector is provided for leak-testing objects that are to be tested by spraying tracer gas, the leak detector including: a detection inlet configured to be connected to an object that is to be tested; a pumping device including a vacuum line connected to the detection inlet, a rough-vacuum pump connected to the vacuum line, and a turbomolecular vacuum pump connected to the vacuum line, a delivery of which is connected to the rough-vacuum pump; and a gas detector connected to the turbomolecular vacuum pump, the pumping device further including an ancillary pump connected to the rough-vacuum pump and being configured to lower an ultimate-vacuum pressure of tracer gas in the rough-vacuum pump. A leak detection method for leak-testing objects that are to be tested by spraying tracer gas is also provided.

A method for displaying gas concentration values on a graphical display of a leak detector comprises detecting a presence of a gas using a gas sensor. A signal is generated by the gas sensor and transmitted from the gas sensor to a processor. The received signal is processed to determine a gas concentration value and a corresponding time stamp. The gas concentration values and corresponding time stamps are displayed graphically as they are determined and newly determined gas concentration values and corresponding time stamps are displayed in relation to previously determined gas concentration values and time stamps in streaming manner.

A fluid evacuation apparatus comprising a platform which is configured to receive at least one component. The fluid evacuation apparatus further comprising a cover comprising a polymeric membrane, the cover configured to be placed over the at least one component and configured to sealingly engage the platform, thereby forming a chamber which defines a chamber volume. The fluid evacuation apparatus further comprising a pump connected to the apparatus and configured to pump fluid out of the chamber volume.

Leak detection device having a dome with a main body and a seal configured to define a detection chamber between the main body and the test zone, the seal including a peripheral sealing lip configured to come into contact with the sealing membrane and having a closed contour encircling the detection chamber, an analysis tool connected to the detection chamber to analyze a gas present in the detection chamber in which the sealing lip is configured to have at least in a service state in which a reduced pressure is applied in the detection chamber, a pinch portion that is pinched between the main body and the sealing membrane.

The invention relates to a leak detection device comprising: a portable leak detection bell-like member comprising a sealing joint and configured to define a detection chamber between the main body and the test zone, the detection bell-like member further comprising a carrying handle which is provided with a control member which can be manually activated to produce a control signal, a gas suction circuit which is intended to connect the detection chamber to a vacuum pump, the gas suction circuit being provided with a controlled valve which can be switched into an open state to connect the detection chamber to the vacuum pump and a closed state to isolate the detection chamber from the vacuum pump, and a control unit which is configured to switch the controlled valve in response to the control signal.

Gas leak detector with a hand-held sniffing probe (30), a vacuum pump (36), a gas conducting line (44) connecting the sniffing probe (30) and the vacuum pump (36), and a solid state semiconductor gas sensor (46) for directly and simultaneously analysing tracer gas components in the gas flow sucked in by the sniffing probe (30) during leak detection, wherein the gas sensor (46) is connected to the gas conducting line (44) such that a first portion (54) of the gas conducting line (44) extends from the sensor (46) to the sniffing probe (30) and a second portion (52) of the gas conducting line (44) extends from the gas sensor (46) to the vacuum pump (36), wherein the sniffing probe (30) comprises an orifice forming a suction inlet into the gas conducting line (44), and wherein the second portion (52) of the gas conducting line (44) connects the gas sensor (46) to a low pressure inlet (42) of the vacuum pump (36), while an outlet (56) of the vacuum pump (36) is connected to atmosphere characterized in that the gas sensor (46) is arranged at the location of the vacuum pump (36) such that the length of the first portion (54) of the gas conducting line (44) is larger than the length of the second portion (52) of the gas conducting line (44), and the second portion (52) of the gas conducting line (44) connects the gas sensor (46) to a low pressure inlet (42) of the vacuum pump (36), while an outlet (56) of the vacuum pump (36) is connected to atmosphere.

Disclosed is a connecting device for connecting a gas sensor to a gas leak detector. The gas sensor includes an elongate sensor housing. The gas leak detector includes at least one gas connector adapted to be connected to the gas sensor. A guide rail connects to the gas leak detector, engaging with the sensor housing such that the gas connectors engage with at least one complementary second gas connector. A fastening claw includes two elastic spring legs arranged at one of the sensor housing and the gas leak detector. Each of the two spring legs includes a latching boss engaging the frontal end of the gas sensor opposite the second gas connector and a spreading element having two retaining arms. Each retaining arm includes a pulling edge, an inclined insertion portion along which the latching boss grips and pivots the spring leg, and an inclined disengagement portion.

A leak detector for checking the sealing tightness of an object to be tested includes a detection inlet to be connected to the object, a first pumping device, and a gas detector. The first pumping device includes a first rough vacuum pump, at least one second rough vacuum pump, and a turbomolecular pump. The gas detector is connected to the turbomolecular pump. The outlet of the at least one second rough vacuum pump is connected to the first rough vacuum pump, between two in-series pumping stages of the first rough vacuum pump.