Leak monitoring system handling

Long-term Behaviour and Handling of Leak Monitoring Systems... 

Over a total period of operation the core sub-assembly cleaning system performance was sufficiently reliable. Like with the fuel handling system it is the mechanism position indication and control system that has mostly been a trouble contributor with an impact from the process control and monitoring system. The process configuration itself is unsatisfactory since the manifold of the steam-water cleaning cells is combined with the equipment cleaning system (large capacities, risk of overflows and leaks, etc...). 

The usual precautions must be observed around the high tension electrical equipment supplying power. The carbon monoxide formed, if collected in closed furnaces, is usually handled through blowers, scmbbers, and thence to a pipe transmission system. As calcium carbide exposed to water readily generates acetylene, the numerous cooling sections required must be constandy monitored for leaks. When acetylene is generated, proper precautions must be taken because of explosibiUty of air—acetylene mixtures over a wide range of concentrations (from 2.5 to 82% acetylene by volume) and the dammabiUty of 82—100% mixtures under certain conditions. 

Some niekel eompounds may be irritant to skin and eyes and dermal eontaet with niekel ean result in allergie eontaet dermatitis. Niekel earbonyl is extremely toxie by inhalation and should be handled in totally enelosed systems or with extremely effieient ventilation. Air monitors linked to alarms may be required to deteet leaks. Respiratory equipment must be available for dealing with leaks. Biologieal eheeks (e.g. niekel in urine) should be eonsidered for routine operations involving niekel eatalysts. 

Hydrogen therefore needs to be handled with care. Systems need to be designed with the lowest possible chance of any leaks and should be monitored for such leaks regularly. 

This section should provide relevant information on the radioactive waste treatment systems as described in paras 3.65-3.70. It should include the design features of the plant that safely control, collect, handle, process, store and dispose of solid, liquid and gaseous forms of radioactive waste arising from all activities on the site throughout the lifetime of the plant. This should include the structures, systems and components provided for these purposes and also the instrumentation incorporated to monitor for possible leaks or escapes of radioactive waste. The potential for radioactive waste to be adsorbed and/or absorbed should be considered in deciding on the measures necessary to deal with this hazard. Further discussion on matters to be covered in this section of the SAR is provided in Ref. [32]. 

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