Containment Leak Rate Test System

No design requirements associated with maintaining safety functions are placed on the containment leak rate test system. 

After the leak rate test of the reactor containment vessel, which was the final system function test, a criticality approach test was performed as the first performance test. The minimum critical mass was measured, replacing dummy elements with core fuel stored in the... 

It was possible to complete all tests without any significant corrections within the specified values and within the given time. In this respect, the pressure and leak tests of the relatively complex and large-volume low-pressure containment system and the reventing system were outstanding hi ights. The leak-rates were much lower than specified. 

Tracer gas analysis. At relatively low system pressures, a small amount of an easily detected tracer gas (usually sulphur hexafluoride, SF6, or helium) is injected into the system to be tested, and leak points identified with a suitable detector. This method can be extremely sensitive and is the method of choice when the highest level of containment is specified. From the rate of tracer gas emission, the nominal dimensions of the leak can be measured (G. Leaver, 1990, personal communication), which is a first step in assessing the risk in biological terms. 

Topical aerosols and nasal sprays rely on pump systems to deliver the API in the form of finely dispersed mist or as coarse spray or stream of semisolid. Because of their design, aerosol and nasal products are usually under very high pressure, and this makes it difficult to obtain suitable samples for analysis. In spite of that, a number of very specialized tests which include pressure test, minimum fill, number of discharges per container defivered dose uniformity, delivery rate, leak test, spray pattern and plume geometry test, assay, and microbial enumeration test (MET) have been devised to test the integrity of the aerosol package and the device used to defiver the dose. ... 

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