Figure 9.
The four panels compare measurements during different test periods. Panel a plots flow into the system, flow into the buffer, gas pressure, and predicted pressure from about 2475 to 2535 days. Gas pressure rises to about 5250 kilopascals, then decreases and stabilises near 5200 kilopascals. Flow into the buffer shows two sharp peaks and then fluctuates around 1.0 times 10 to the minus 8 cubic metres per second. Panel b plots the same variables from about 5200 to 5210 days. Gas pressure increases to about 5300 kilopascals before dropping. Flow into the buffer reaches about 4.0 times 10 to the minus 7 cubic metres per second and later shows a second smaller peak. Panel c plots radial stress for P R 911, P R 915, P R 917, and P R 919 from about 2475 to 2615 days. All series increase after the marked event, with P R 915 and P R 919 reaching about 350 kilopascals and 330 kilopascals. Panel d plots radial stress for P R 909 to P R 922 from about 5180 to 5223 days. Most series show step increases near 5203 days, followed by gradual increases and later decreases after about 5220 days.Comparison of gas entry behaviour for the two tests conducted in canister filter FU910: (a) gas entry behaviour for Gas Test 3; (b) gas entry behaviour for Gas Injection Test 5; (c) radial stresses observed in Gas Test 3; (d) radial stresses observed in Gas Test 5. Note: For display purposes in (c) and (d) each sensor has undergone translation along the y-axis