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Perret-Gatel, S.

Paper Title Page
G-01 A New Unit Access Control for GANIL and SPIRAL 2 357
 
  • J. L. Baelde, C. Berthe, F. Chautard, F. Lemaire, S. Perret-Gatel, E. Petit, E. Pichot, B. Rannou, J. F. Rozé, G. Sénécal
    GANIL, Caen
  
 

For the GANIL safe­ty reval­u­a­tion and the new pro­ject of ac­cel­er­a­tor SPI­RAL 2, it was de­cid­ed to re­place the ex­ist­ing ac­cess con­trol sys­tem for ra­di­o­log­i­cal con­trolled areas. These areas are all cy­clotron rooms and ex­per­i­men­tal areas. The ex­ist­ing sys­tem is cen­tral­ized around VME cards. Up­dat­ing is be­com­ing very prob­lem­at­ic. The new UGA (ac­cess con­trol unit) will be com­posed of a pair of PLC to en­sure the safe­ty of each room. It will be sup­ple­ment­ed by a sys­tem UGB (ra­di­o­log­i­cal con­trol unit) that will as­sure the ra­di­o­log­i­cal mon­i­tor­ing of the area con­cerned. This pack­age will for­bid ac­cess to a room where the ra­di­o­log­i­cal con­di­tions are not sure and, con­verse­ly, will for­bid the beam if there is a pos­si­bil­i­ty of pres­ence of a per­son. The study of the sys­tem is fin­ished and the record of safe­ty in prepa­ra­tion. At GANIL, the ions are ac­cel­er­at­ed by cy­clotrons (C01 or C02, CSS1, CSS2, CIME) and are trans­port­ed through beam­lines to­wards the rooms of ex­per­i­ments (D1-D6, G1-G4). A first named ex­ten­sion SPI­RAL was brought into ser­vice in 2000. It makes it pos­si­ble to pro­duce and post-ac­cel­er­ate, via the cy­clotron CIME, the ra­dioac­tive ion beams ob­tained by frag­men­ta­tion of sta­ble ions re­sult­ing from CSS2 in a car­bon tar­get. The pro­ject SPI­RAL2 will ar­rive soon and has the same need in safe­ty. Each room must thus re­main con­fined (with­out human pres­ence) when po­ten­tial­ly dan­ger­ous ion­iz­ing ra­di­a­tions are pre­sent. This pro­tec­tion was iden­ti­fied as an im­por­tant func­tion for safe­ty and is pro­vid­ed by EIS (Im­por­tant Equip­ment for Safe­ty). The EIS of GANIL are re­ferred and de­scribed in the RGE (Gen­er­al Rules of Ex­ploita­tion). It was de­cid­ed to re­place the cur­rent sys­tems of se­cu­ri­ty man­age­ment by four dis­tinct but in­ter­con­nect­ed sys­tems.