26 September 2006
Response time must be the time for system operation from the
presentation of an energy source to the detector to flow of water
from the water spray nozzle being tested.
Ultra high-speed deluge systems must be designed to have a
response time of not more than 100 milliseconds, unless a risk
assessment or other data indicates a need for a faster response
Timers or similar devices to stop water flow after a predetermined
time are permitted if they are fail-safe (i.e., water continues to flow
in the event of a timer failure).
Timers or similar devices that shut off the water flow after a
predetermined time (typically 1 to 2 minutes) when the optical fire
detectors no longer detect a fire are permitted. In case of a failure,
it must fail in the on (water flowing) position.
Due to the speed of water coming from all the nozzles, ultra high-speed deluge
systems depend on the detection system, piping network, nozzles and water
supply characteristics. Only experienced designers, engineers, and installers
who understand the system's limitations and capabilities should provide the
design, specification, and installation of the deluge system.
All munitions production, maintenance, renovation, quality assurance and
demilitarization operations will receive a risk assessment to identify potential fire
and thermal threats and to assess the level of risk. The hazard must be
accurately defined. A potential fire and or thermal hazard whose level of risk is
high or extremely high is unacceptable. The risk assessment will consider
factors such as:
Quantity of material
Potential ignition and initiation sources