NBC Collective field Protection System
R & DE, Pune has developed an Integrated field shelter, which, when buried about 1 meter underground, provides collective protection against NBC hazards for up to 30 persons for 96 hours.
This shelter can be used as command or observation post or for storage in a NBC environment. 
The protection system includes gen-set, filtration/ ventilation system, waste disposal system and power supplies. The shelter is pre fabricated galvanized steel structure comprising right angled corner entrance and exit, decontamination unit, two main living modules and utility modules connected together by vestibules.
The shelter can withstand a circular pressure of 7.5 tonne/square meter and longitudinal pressure of 15 tonne/square meter on non earth covered portions. The shelter has special fasteners for quick components man-portable and dismantling.
The over all diameter is 28 meter long and 2.5 meter width. One system is approximately 3 tonnes in weight. The ventilation / filtration system (3 numbers) is a blower filter of 200 meter cube per hour with pre filter and composite HEPA filter integrated with flash sensor. The shelter is powered by two DG sets of 5KVA each. It has two thousand liter water tanks and for sewage disposal it uses chemical toilets and pumps.
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