EUROn Safety 13/06/2012M. Dracos1. Safety workshop 13/06/2012M. Dracos2 A first two days safety workshop has been organized at CERN last May (http://indico.cern.ch/conferenceDisplay.py?confId=134751)http://indico.cern.ch/conferenceDisplay.py?confId=134751

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Presentation transcript:

EUROn Safety 13/06/2012M. Dracos1

Safety workshop 13/06/2012M. Dracos2 A first two days safety workshop has been organized at CERN last May ( ~30 participants. presentations: How to include safety in a Design Study: P. Bonnal Safety at J-PARC: Yoshikazu Yamada Safety issues at ITER: John Poole Safety for SPIRAL II: Erwan Pichot Safety at ESS: Thomas Hansson Safety for SNS: S. Trotter Experience from CNGS: Ans Pardons Safety regulations at Fermilab: Mike Andrews + EUROnu presentations

WP2 (Super Beam) 13/06/2012M. Dracos3 Structure of the Building: Proton Driver lineProton Driver line Experimental HallExperimental Hall –MW Target Station –Decay Tunnel –Beam Dump Maintenance RoomMaintenance Room Service GalleryService Gallery –Power supply –Cooling system –Ventilation system Waste AreaWaste Area

WP2 (Super Beam) 13/06/2012M. Dracos4 of all the radionuclide's created 22 Na and tritium could represent a hazard by contaminating the ground water. Limits in activity after 1y=200days of beam: Activation in molasse CERN concrete concrete

WP2 (Super Beam) 13/06/2012M. Dracos5 Evolution of the horn activity with cooling time: Radioactivity after 1 day (Bq.cm -3 ) Radionucleides after 1 day (Z,A)

WP3 (Neutrino Factory) 13/06/2012M. Dracos6

WP3 (Neutrino Factory) 13/06/2012M. Dracos7

WP4 (Beta Beam) 13/06/2012M. Dracos8

WP5 (Detectors) 13/06/2012M. Dracos9 MEMPHYS Overview health and safety culture and management The existing laboratory (and also a possible LAGUNA megaton-scale underground laboratory close by) benefits from the entire safety infrastructure settled-up by the operator of the road tunnel. The safety management is the responsibility of the GEF (Groupement d’Expoiltation du Frejus) which is a common operator resulting from the two Fréjus tunnel companies: SFTRF (French) and SITAF (Italian). The road tunnel safety teams are operational 24/24 hours and 7/7 days. The existence, in a near future, of the safety tunnel (8 meters in diameter) will provide a very safe horizontal and independent access to the laboratories. The goal is to have zero accidents in all these infrastructures. For that, the relevant equipment is at the top level and the rules of safety to respect are very stern and have as objective to protect both people and facilities.

WP5 (Detectors) 13/06/2012M. Dracos10 MEMPHYS Construction phase I: rock excavation All risks must be assessed, tested, and efficiently mitigated. Excavation operations will be achieved by competent enterprises that will respect all norms and rules for underground works. A particular attention will be carried to the reinforcement of the rocks with the progression of the excavation. For each detector module, the excavation of the cavern dome is performed in successive steps by drill and blast. During the excavation, a preliminary support is installed (shot concrete and systematic rock bolts). The deepening of the cavern can thus start by proceeding from top to bottom. The stability is improved with systematic pre-stressed strand anchors. The access to the site will be possible without crossing of the trucks by using the road tunnel to enter and the safety tunnel to leave. This will permit a better safety of the staffs in case of emergency evacuation. The ventilation of the site will be done by the safety tunnel himself, estimated fresh air flow at present is of 35 to 50 m 3 /s. It will be planned an independent sheath for the extraction of the spoiled air (2 to 2.5 meters of diameter)

WP5 (Detectors) 13/06/2012M. Dracos11 MEMPHYS Construction phase II: tank construction and outfitting The water upper level in the tank will be lower than all the access and technical installations. For the moment only Technodyne Ltd has studied the tank, while the Lombardi Company investigated the interface between the tank and the rock. Special attention should be paid to the transport and handling underground of bulky items. Concerning the seismic risk, the Fréjus site is located in a region classified with a low seismic hazard.

What to include in the final report 13/06/2012M. Dracos12 For each relevant section: subsection with safety issues risks can the facility be constructed safely? can the facility be operated safely? can the facility be dismantled safely? implication on the cost