• Rapsodie reactor and Fuel assembly
shearing laboratory (LDAC)
Rapsodie, a fast neutron experimental reactor, was shut down on 15
April 1983. Final shutdown was declared on 28 May 1985. As from 1987,
this installation has been undergoing work, which led to its partial
decommissioning.
This work was interrupted in 1994, further to a fatal accident which
occurred during the cleaning of a sodium tank. This accident, which
emphasizes the risks involved in decommissioning operations, necessitated
rehabilitation and partial cleanup processes, which were completed by
the end of 1997. Since then, the clean-up, limited decommissioning and
waste removal work has resumed and the installation has now reached
the servicing and surveillance phase. Renovation and refurbishment work
has also been carried out.
Installed at Cadarache, the LDAC, which is part of the BNI comprising
the Rapsodie reactor, carried out tests and reviews on spent fuel irradiated
in Rapsodie or in other fast neutron reactors. This laboratory has been
shut down since 1997. It is cleaned-up, under surveillance and awaiting
decommissioning.
In 2002 and 2003, the CEA sent the ASN the updated General Operating
Rules (RGEs) and an updated safety reference system which covered the
Rapsodie reactor, the LDAC and the neutron radiography reactor in a
single document. The 2005 review of these documents found that the justifications
were insufficient, in particular with respect to the forthcoming clean-up
operations. A revised version of the installation's safety reference
system should be forwarded to the ASN at the end of 2005.
• Harmonie reactor
The Harmonie reactor, a source of graded neutrons, mainly used for
detector calibration and investigation of the properties of certain
materials, installed on the CEA Cadarache site, has been shut down since
1996. After removal of the depleted uranium, the experimental rigs,
the fuel and the sources it contained, it was decommissioned on 18 December
1997.
The decree authorising the CEA to proceed with final shutdown and
decommissioning was published on 8 January 2004. The operations covered
by this decree are in progress. Reactor block cutting, reactor hall
clean-up and waste removal were carried out in 2005.
• Enriched uranium processing facilities
(ATUE)
The ATUE at the CEA Cadarache Centre provided conversion into sinterable
oxide of the uranium hexafluoride from the isotopic enrichment plants.
They were also used for the chemical reprocessing of fuel element fabrication
scraps to recover the enriched uranium they contain. The facility was
also equipped with a low level organic liquid incinerator. Production
in the facilities ended in July 1995 and the incinerator was shut down
at the end of 1997. In April 2002, the ASN authorised the clean-up of
the incineration line.
In March 1998, the CEA provided a request for final shutdown and decommissioning
of this BNI, which was updated in 2003. The decree authorising these
operations should be published in 2006.
• Cadarache irradiator (IRCA)
The Cadarache irradiation installation was designed to test the resistance
of PWR safety-related electrical equipment to gamma radiation. Since
the installation has not functioned since June 1995, the licensee decided
to shut it down in March 1996. The sources it contained were removed
and sent to the Grenoble centre in April 1996.
The decree authorising the CEA to proceed with final shutdown and
decommissioning was published on 8 January 2004. The operations covered
by this decree were carried out during 2004, after which, the CEA sent
the ASN a BNI delicensing application based on a residual environmental
impact assessment. A draft conventional encumbrance on behalf of the
State was transmitted to the ASN in 2005.