Bulletin 1/2010 - Siempelkamp NIS

Transport of the RPV sealing head with the multi-purpose
lifting device
In the meantime, the works on the reactor proceed. The crane
has attached itself to the special cross beam (by Siempelkamp
Nukleartechnik) which is now lifting the RPV head (RPV =
Reactor Pressure Vessel) to a set-down structure which is also
included in the SNT scope of supply. Afterwards, the multipurpose
lifting device from Siempelkamp lifts out the upper
core structure. This process requires a high degree of precision
from the crane operator as well as from the lifting beam. It is no
miracle that these lifting beams are custom-made solutions by
our engineers! Once the upper core structure has been removed
from the reactor, the fuel elements can be reloaded.
If, during the fuel element reloading process in the PWR, no
works on the primary system are necessary, a removal of all fuel
elements from the core structure is also not necessary. Inside the
PWR, the fuel elements can then be reloaded from the core into
the wet storage pool and vice versa. This reloading process is
carried out by the “SHUFFLER” programme system developed
by the nuclear physicists of the NIS Ingenieurgesellschaft.
The system results in a tremendous reduction in the time needed
for the inspection. The step sequence for the plant inspection,
which has to be approved by an offi cial authority prior to the
inspection, is mandatory and serves as precise instructions for the
procedure.
SIEMPELKAMP | NUCLEAR TECHNOLOGY