130 likes | 264 Vues
Nuclear Facilities Decommissioning & Design An introduction to SENAC activities. JM. Dumas. CEA Saclay, DSM/DAPNIA/SENAC, F-91191 Gif-sur-Yvette, France. Bucharest May 2006 jean-michel.dumas@cea.fr. The SENAC activities. Main objectives
E N D
Nuclear Facilities Decommissioning & Design An introduction to SENAC activities JM. Dumas CEA Saclay, DSM/DAPNIA/SENAC, F-91191 Gif-sur-Yvette, France ridikas@cea.fr Bucharest May 2006 jean-michel.dumas@cea.fr
The SENAC activities Main objectives to contribute to the design of nuclear facilities (accelerators, reactors, laboratories,…) to develop methodologies in radioactive waste management and in radiological impact evaluations to maintain a high level of expertise in decommissioning (experience feedback in dismantling of accelator facilities) to take part in educational programs (decommissioning & radioactive waste management) ridikas@cea.fr Vilnius 07-11 Nov 2005 blideanu@cea.fr Bucharest May 2006 jean-michel.dumas@cea.fr
The SENAC activities • Main applications • design studies for small facilities (ARRONAX cyclotron,…) to large nuclear facilities (ITER, SPIRAL2,...) biological shielding (adaptation to dose rate limits, application of ALARA method to operate,…), choice of materials (limitation of radioactive waste produced by activation of components,…) limitation of release of radioactive gases or particles to environment nuclear safety & security report to authorities ridikas@cea.fr Vilnius 07-11 Nov 2005 blideanu@cea.fr Bucharest May 2006 jean-michel.dumas@cea.fr
The SENAC activities • Main applications • global strategy and studies of decommissioning based on radioactive waste management and radioprotection • application of nuclear safety authority requirements, • radioactive waste zoning (nuclear / non nuclear waste), • radioactive waste characterization and classification • radioactive waste processing (treatment, conditioning, transport to storage) • safety of the final state to terminate the nuclear Licensing process (evaluation of the radiological & residual impact) ridikas@cea.fr Vilnius 07-11 Nov 2005 blideanu@cea.fr Bucharest May 2006 jean-michel.dumas@cea.fr
Target station design at ARRONAX cyclotron facility From decommissioning to design at DAPNIA/SENAC Beam line dismantling at SATURNE accelerator • ARRONAX cyclotron facility (Nantes) * • SATURNE proton accelerator Emax~3 GeV (Saclay) * • ALS electron accelerator Emax~700 MeV (Saclay) * • RUS research reactor P=100 KW (Strasbourg) * • ULYSSE research reactor P=100 KW (Saclay) * • RAPSODIE research reactor P=40 MW (Cadarache) * → SOPHI positron source (Saclay) * → SPIRAL-2, EURISOL RIB production facilities → SILOE research reactor P=35 MW (Grenoble) → PHENIX power reactor P=250 MW (Marcoule) → CPO proton therapy facility (Orsay) * → LHC & SPS accelerators (CERN) ridikas@cea.fr Bucharest May 2005 jmdumas@dapnia.cea.fr
Decommissioning of RUS research reactor ridikas@cea.fr Bucharest May 2005 jmdumas@dapnia.cea.fr
Decommissioning of ULYSSE research reactor ridikas@cea.fr Bucharest May 2005 jmdumas@dapnia.cea.fr
LA waste VLA waste Conventional waste Decommissioning of RAPSODIE research reactor ridikas@cea.fr Bucharest May 2005 jmdumas@dapnia.cea.fr
Residual activity of a collimator Activity (Bq/g) Cooling time (days) Residual activity in beam line components at CPO Proton therapy beam line at CPO → Beam collimators Cu 58.7%, Zn 39.2%, Pb 2.1% → Irradiation time 6 minutes with 200 MeV protons → Average mass 7 Kg → Present stock 4.5 tons of irradiated material ridikas@cea.fr Bucharest May 2005 jmdumas@dapnia.cea.fr
High intensity positron source SOPHI • Shielding calculations for neutrons and photons • Electron beam dump design for low neutron production ridikas@cea.fr Bucharest May 2005 jmdumas@dapnia.cea.fr
70 MeV protons sur la cible Design of ARRONAX nuclear facility Beam-target configuration / radioisotope yield Neutron transport in biological shielding TR3 TR4 CYCLOTRON EX1 TR2 TR1 TR5 ridikas@cea.fr Bucharest May 2005 jmdumas@dapnia.cea.fr
Waste zoning of nuclear facilities Application to waste zoning of SATURNE accelerator facility Conventional waste zone Nuclearwaste zone Saturne facility ridikas@cea.fr Bucharest May 2005 jmdumas@dapnia.cea.fr
Waste zoning of nuclear facilities Application to waste zoning of ALS linear accelerator facility Conventional waste zone Nuclearwaste zone ALS facility ridikas@cea.fr Bucharest May 2005 jmdumas@dapnia.cea.fr