FIGURES (Cont 'd) Figures 4-22 PIC signal versus steady state ionization current -Tor 1 atmosphere Ar-5% N; -filled neutron -gamma sensitive (+) and gamma sensitive (B) chambers at. the temperature 297°C. 4-1 PIC signal versus steady state ionization current for 1 atmosphere Ar-5% ^-filled neutron-gamma sensitive (+) and gamma sensitive (a) chambers at the temperature 377°C. 4-24 PTC signal versus temperature for 2 atmosphere Ne-filled neutron-gamma sensitive (x) and gamma sensitive (+) chambers at position 3. 4-25 PIC signal versus temperature tor 1 atmosphere Ar-5% N2"filled neutron-gamma sensitive (x) and gamma sensitive (+) chambers at position 3. vvn Face 72
Abstract of Dissertation Presented tothe Graduate Council of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy APPLYING FHE PULSED ION CHAMBER METHODOLOGY TO FULL RANGE REACTOR POWER MEASUREMENTS Bruce J . Kaiser June, 1977 Cha i rma n : Or . William H . El 1 i Major Department: Nuclear Engineering Sciences A computer based/controlled PIC solid state electronic system is presented in its entirety. Its operation is described and evaluated both as a plasma diagnostic instrument and a basic reactor power measurement system. The system, in conjunction with two sets of matched ionizationchambers (one with a 93% enriched U coating the other without), is evaluated in terms of response in radiation fields of I0 C tc 3 x 10 R/hr at temperatures ranging from 25°C to 475°C. Two different sets of cham- bers were used, one containing Ar-5%N , the other Ne. Gamma compensationto within % -•_ 5% proved feasible, at c qivin temperature from, 10' to 3 -,.,5 .--,. x 10 R/nr. "he ensmbers 1 responses altered over the temperature r?j\nc used. The PIC s^nai for neon at 3 x 10 R/hr zna ?5°C was 2.03V where at 432°C it was 4,75V, For the Ar - 5% M chambers under the same conditions the signal increased from 1 .9V to ? . 74 vol ts . The Ar-N,-, chamber temperature response was expected. The Ha temperature resoor.ee was constant up to iy.