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4.2 Consequences of fires
"Sea ports, as economic facilities located at the interface
between land and sea, are prepared in terms of
technical and organizational aspects to handle foreign
trade, by sea, together with means of sea and land
transport. Therefore, ensuring an acceptable level of
fire safety in ports must include within its scope all
threats related to the characteristics of each of them.
Although certain groups of fire threats are common to
all types of ports, it would be necessary to differentiate
the scale and effects of their impact depending on
whether they concern commercial, passenger or
military ports. Considering civilian ports, it should be
borne in mind that especially those located in the
agglomerations of Gdańsk-Gdynia or Szczecin-
Świnoujście, are key elements for the national economy
of our country. They also have the largest number and
variety of threats. A separate category in terms of fire
threats are fuel ports, such as the Northern Port in
Gdańsk, where, due to the trade exclusively in media
with specific fire characteristics - fire-hazardous
materials, dedicated early detection and mitigation
systems for this type of threat are used. " [5]
In addition to the danger to the port crew, it is also
worth remembering:
− economic losses – damage or complete destruction
of cargo, downtime in port operations, need to
clarify the situation, control early warning and
prevention systems, additional staff training,
− environmental losses – potential leaks of hazardous
cargo into the atmosphere, negative impact on the
natural environment as well as on people living in
close proximity to the port (the best example is the
ban on opening windows and leaving the house
during and immediately after the fire extinguishing
operation in the port of Gdańsk)
− logistical losses – the need to provide access during
fire extinguishing operations, stop work at the
terminal and find another place to store goods for a
specified period of time, conduct an accident
investigation.
There are incidents related to the dangers of storing
cargo in containers all over the world. On August 12,
2015, in the port of Tianjin in North China, explosions
occurred in a storage yard located in Binhai New Area,
as a result of which 173 people died (including 104
firefighters taking part in the firefighting operation)
and many others were injured. The explosions, with a
power of about 800 tons of ammonium nitrate
(equivalent to about 256 tons of dynamite sticks)
occurred within about 30-40 seconds of each other.
Although the cause of the incident was not known at
first, after conducting an appropriate investigation, the
cause of the explosion was found - incorrectly stored
refrigerated container carrying nitrocellulose, as a
result of which it overheated, and caused the harm.
4.3 Difficulties in responding to fires in ports
Despite increasingly modern early warning systems,
incidents at ports involving fires continue to be a major
challenge for container terminals.
Main reasons for the difficulties in responding:
− a vast area where containers are located,
− stacking of containers,
− delayed response of the services.
Due to the above, there is a growing need to find a
modern way to early detect and warn of an
approaching disaster, for example by using unmanned
aerial vehicles – drones, equipped with appropriate
devices that help in everyday work on the safety of
container terminals and ensuring continuity of work.
5 FIRE PREVENTION SYSTEM
Taking into account the previous chapters, it is safe to
point out an argument that it is necessary to develop
new firefighting and fire preventing or detection
systems. The last decade has brought rapid growth in
the fields of automatics, autonomous or semi-
autonomous vehicles, including unmanned aerial
vehicles and Virtual-Reality (VR) or Augmented-
Reality (AG) related technologies. This fact brings the
opportunity to combine these ideas and try to create a
fire prevention system based on them.
5.1 Theoretical outline of the system
Solution proposed in this paper include drones
equipped with both normal and thermal cameras as
well as the sensors to detect smoke, dustiness and fire-
related pollution. To maintain high effectiveness, it is
necessary to use some of the sensors directly in
container stacks. VR could be an optional feature. The
main characteristics of the system should be as follows:
− semi-autonomous - it should be possible to fix
regular autonomous patrol path for the drones and
to take manual control over them, when necessary,
− constant - the sensors mounted in containers stacks
should maintain constant monitoring of basic
parameters and the unmanned aerial vehicles
should patrol specified area in regular intervals,
− three level alarm - entering each level should
depends on the measurements taking by sensors,
− weather insensitivity - the system should take
actual weather conditions into consideration when
entering the next alarm level.
Every device should be connected to one server that
performs analysis of the measurements and manages
the states of the system.
As previously stated, the system should include
three levels of actions:
− Normal mode - static sensors constantly monitor
each parameter, drones patrol area autonomously
on the fixed routes and taking additional
measurements; the drones should fly in regular
intervals; if every parameter fits in established
requirements the report is generated.
− Pre-alarm mode - if one of the sensors detects
abnormal parameters (e.g. temperature of a
container higher than expected) the system should
generate a warning. The nearest drone should be
sent to the area that generates the warning and
switch to manual control. Next, the properly trained
worker should use the drone to check if the
dangerous situation really occurs. Depending on
the outcome the worker should turn off the pre-
alarm mode or switch to alarm mode. In both cases
the system should save logs from the incident and
generate a report.