Post on 15-Mar-2022
SEP 29 2013
MAY 13 2011
LOADING A MODULE ONTO THE BARGE
TILTING THE LAST MODULE IN PLACE
Discover more on www.mammoet.com
NUCLEAR SAFETY REQUIREMENTS INSPIRE AN OPTIMIZED SCHEDULE.
SEP 24 2013
DISCHARGE OF MODULEJUNE 2 2011
BEACH LANDING OF SPECIALLY DESIGNED BARGE
A Z
As in all nuclear projects, safety
was the top priority for the
construction of a new evaporator
unit at the Sellafield nuclear
reprocessing site. To accelerate
the schedule, civil engineer
Costain had developed a modular
construction plan. Eleven
modules had to be transported
to the site before being lifted
and installed inside the unit.
The safety of the procedure had
to be absolutely beyond doubt.
So Mammoet killed two birds
with one stone by devising a
tailor-made four-way gantry
system that would deliver
precision and safety while saving
two months of construction time.
The gantry system would lift each of
the modules to the correct height,
from which they would be skidded
into the new unit and installed.
However, the modules needed to be
installed in 11 different locations in
the unit. This meant that the entire
gantry system had to be moved
alongside the unit prior to each
installation. Normally, a gantry is
jacked-up and down when it needs
to be repositioned. But this would be
time-consuming if it had to be done
11 times. Therefore, Mammoet came
up with the idea of designing and
installing the system on permanent
skids. That way, the gantry could be
skidded without jacking-up the entire
system every time it needed to be
repositioned. This solution greatly
increased the level of efficiency, and
saved two months of time during the
whole project.
The modules – ranging between
50 and 500 tons – were built at
Ellesmere Port near Liverpool.
After completion, they were
transported to the quay on Mammoet
SPMTs. There, they were positioned
on a specially-designed barge that
could land on the beach near the site
as there was no dock facility
available. Via an installed ramp and
temporary road over the beach,
the modules were driven off to the
storage area. There they were
checked, and then transported to
the site for installation. The gantry –
34 meters high, 38 meters wide, and
18 meters long – lifted the modules
from the SPMTs to the right level.
From there, they were skidded into
the evaporator unit for installation.
The last module was lifted and
installed in 2013, and the new unit is
expected to be operational in 2016.
RESOURCES
CRANES 2 mobile cranes
TRANSPORT 32 axle lines of SPMT
MARITIME EQUIPMENT 1 barge
SPECIAL EQUIPMENT 1 gantry system, consisting of:1 heavy skid system, 2 38 meter gantry beams, 1 medium skid system, 1 specially designed lift table, 1 stroke controlled jacking system, 4 300 ton strand jacks
CREW 16 Mammoet professionals
used
by
perm
issi
on fr
om S
ella
field
Ltd
used
by
perm
issi
on fr
om S
ella
field
Ltd
used
by
perm
issi
on fr
om S
ella
field
Ltd