LIEBE project Safety aspects of the Pb/Bi loop target LIEBE meeting report – WP5AP.Bernardes Thanks to : Richard Catherall/EN-STI, M.Delonca/EN/STI, TM.De Melo Mendonca/EN/STI, A.Dorsival/DGS-RP, Anthony Marchix/CEA, T.Stora/EN/STI and J.Vollaire/DGS-RP…

Outline LIEBE meeting report – WP5AP.Bernardes Summary of past safety recommendations Risk analysis Next steps

Same confinement level requested as static target (double enclosure) including piping and storage container Safety issues LIEBE meeting report – WP5AP.Bernardes

Double enclosure integrated on concept 1 or 2 Safety issues LIEBE meeting report – WP5AP.Bernardes Acknowledgement M.Delonca EN/STI Extract of “Pb-Bi loop target at CERN for the EURISOL prototyping phase” On going:  Thermal stress study of double enclosure in case of Pb-Bi leak at 600°C  Low point to be integrated

Safety issues LIEBE meeting report – WP5AP.Bernardes Leak should be detected  Leak detection system should be studied as it has been done on MEGAPIE target Acknowledgement : K.SAMEC Extract “Full scale leak test of the MEGAPIE containment hull”  WP4 assigned to TM.De Melo Mendonca EN/STI with PSI expertise Flow rate and pressure on loop to be monitored  Specific development needed Temperature monitoring  Expertise in house

Safety issues LIEBE meeting report – WP5AP.Bernardes Pressure loop > 0.5 bar: Loop to be considered as pressure loop Acknowledgement : IPUL Pressure test to 1.43 of nominal pressure  Integrated on design - Welding test needed

Safety issues LIEBE meeting report – WP5AP.Bernardes From experience we know that chimney and temperature control are very important for liquid target to avoid to send Pb-Bi to the Front-end through the ion source No direct view between container and ion source  Chimney? Acknowledgement : Tania DE MELO MENDONCA EN/STI  To be integrated on conceptual design

 First test very positive  Complementary test to be done for the pump and after irradiation (center of gravity may be modified)  Connection? Safety issues Target handling should be compatible with robot: LIEBE meeting report – WP5AP.Bernardes Acknowledgement : JL.Grenard EN/STI and M.Delonca EN/STI: First robot test with PB-Bi target mock-up

Safety issues LIEBE meeting report – WP5AP.Bernardes Same potential on target -Electrical connection for pump should come from the FE -Pump should be isolated as well (electrical connection?) -… depth available  To be studied  Specific connection to be installed during LS1 should be studied first Target and pump should be compatible with faraday cage and High Voltage (60 KV)

Safety issues LIEBE meeting report – WP5AP.Bernardes Summary of past safety recommendations Risk analysis Next steps

Safety issues LIEBE meeting report – WP5AP.Bernardes CEA Collaboration: Acknowledgement A.Marchix and N.Raxach/DPSN -Target split into subsystems -Deployment of « Grille Mosar » started -Nuclear methodology transfer on going CEA/DPSN joined the collaboration through the MOU (Memorandum Of Understanding)  Expertise on fire prevention

Safety issues LIEBE meeting report – WP5AP.Bernardes Acknowledgements: A.Marchix, M.Delonca, TM. De Melo Mendonca Simplified Failure Modes and Effects Analysis (FMEA) started on preliminary design (input from CERN and CEA, Documents from SCK and PSI)  Show evidence of new interlocks  WP4

Outline LIEBE meeting report – WP5AP.Bernardes Summary of past safety recommendations Risk analysis Next steps

Safety issues What inputs do we need:  Results of Rabit irradiation and information on volatile long half-life alpha emitter (astatine and polonium) releases and PSI isotopes inventory  Heating process and heat exchanger  Corrosion expertise from SCK to complete FMEA  Expertise on pump from IPUL to complete FMEA  Description of the different phases of the process (handling, pumping, heating, operation, cooling, handling, post-mortem, disposal)

Safety issues Planning: 3 months delay on detailed planning -Risk analysis started on first conceptual design – important input has already been integrated  Circulate first analysis to other workpackages  Organize videoconference  Update with evolution of concept - Radioprotection studies not started  isotopes inventory needed

Conclusion -First safety analyses are mainly based on feed-back from ISOLDE, CEA, and documents from SCK and PSI -To be completed thanks to other institute feed-back and expertise (SCK, IPUL, PSI)  Target instrumentation will increase compared to static target (leak detection, pressure, flow rate monitoring, thermocouple…). Extra connection needed Should be anticipated during LS1.  Radioprotection risk assessment is waiting for isotope inventory

Collaboration CEA: A.Marchix/DSM, N.Rachax/DPSN CERN: R.Catherall, M.Delonca, TM. De Melo Mendonca, A.Dorsival, E.Noah, T.Stora, J.Vollaire PSI: D.Schumann SCK: P.Schuurmans Other: K.Samec Thank you !

Summarize Target Design : -Double enclosure mandatory including pipe and storage container -Safety factor 1.43 should be taken into account for the design of the loop -Target design should be compatible with a leak detection system -No direct view between diffusion chamber and ion source Important monitoring for Safety (New connection and monitoring may request modification in primary area): -Temperature (number and position to be defined) -Back-up needed on temperature monitoring (courant monitor) -Pressure (number and position to be defined) -Flow rate monitoring (type, number and position to be defined) -Leak detection (type and position to be defined) -Interlocks to be defined Compatibility: -Robot compatible -Faraday cage compatible -60Kv potential