| 摘要 |
<p>The reference electrode probe utilizes a metal/metal oxide/ZrO2 electrode sensor. Metal/metal oxide couples suitable include copper/copper oxide, tin/tin oxide, bismuth/bismuth oxide, and iron/iron oxide. A zirconia tube (18) has a closed end (20) and an open end (22). The closed end contains the metal/ metal oxide powder (24) and is retained therein by mineral insulation packing (26). A first annular metal sleeve (28) is formed of metal exhibiting a coefficient of thermal expansion compatible with the zirconia tube and has a distal open end (30) in sealing engagement with the open end of said zirconia tube. The first annular metal sleeve (28) also has a proximal open end (32). An insulated first electrical conductor (16) having a distal end in electrical connection with the metal/metal oxide powder extends through the mineral insulation packing and into the first annular sleeve (28). The first conductor also has a proximal end that terminates near the proximal end of the first annular sleeve. Advantageously, an annular ceramic tube (48) is nested within said first annular metal sleeve and provides the insulation for the first electrical conductor. A signal transfer assembly (14) is sealingly associated with the proximal end of the first annular sleeve. A second electrical conductor (46) passes through the signal transfer assembly (14) to its electrical connection with the first electrical conductor (16). The probe has the ability to withstand powerful radiation fields in high temperature, high pressure water, and construction features which avoid any leakage of the radioactive environment, which the sensor contacts.</p> |
