Speaker
Luigi Candido
(Department of Energy)
Description
A crucial issue for the design of HCLL (Helium Cooled Lead Lithium) Test Blanket Module of ITER and HCLL, WCLL, DCLL Breeder Blanket of DEMO is to efficiently characterise the tritium inventory inside the blanket and the permeation of tritium into the coolant in order to reduce as much as possible the radiological hazard towards the external environment. A fast and reliable sensor is required both for tritium management at the several steps of the reactor fuel cycle and for the development of tritium processing systems, e.g. the TES (Tritium Extraction System). Under these points of view, three advanced hydrogen permeation sensors have been developed on the basis of previous sensors manufactured and assessed at ENEA Brasimone. Two permeation sensors were manufactured, a helical and a cylindrical one made of pure iron, in order to reach acceptable response times. Moreover, a sensor made of niobium with a pure iron capsule coated in palladium was manufactured in order to measure the Q2 concentration in PbLi in Dynamic mode with high reliability. The sensors performance is assessed in liquid phase thanks to the Hydrogen Permeation Quartz Chamber (HYPER-QUARCH) device installed at ENEA C.R. Brasimone. Using hydrogen instead of tritium, several tests are carried out in both dynamic and equilibrium mode, simulating ITER and DEMO operative conditions. The tritium concentrations measured are evaluated using different values of the Sievert’s constant.
Co-authors
Italo Ricapito
(TBM&MD Project, Fusion for Energy, Carrer J. Pla, 2, Builiding B3, Barcelona, Italy)
Luigi Candido
(Department of Energy, Polytechnic University of Turin, Turin, Italy)
Marco Utili
(UTIS, Enea Centro Ricerche Brasimone, Località Brasimone, Camugnano (BO), Italy)
Massimo Zucchetti
(Department of Energy, Polytechnic University of Turin, Turin, Italy)
Patrick Calderoni
(TBM&MD Project, Fusion for Energy, Carrer J. Pla, 2, Builiding B3, Barcelona, Italy)
