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Applying the pulsed ion chamber methodology to full range reactor ...

Applying the pulsed ion chamber methodology to full range reactor ...

a given temperature for

a given temperature for the exposure rates where compensation would be required, can be obtained to within +22 or the total gamma signal, The FIC mode chamber response was proven to be temperature dependenl over the range of 25 to 5G0 C C for Ne as well as the Ar-N ? fill gas mixture, however, as stated earlier, the Ne response was constant up to '\.282°C ! this constant range could be extended by reducing the pressure of the Ne fill gas, The 300°C temperature range is the operating range of current light water reactors. Thus this PIC system offers all the required characteristics and more for an in-core wide range neutron measuring system for present light water reactors, A fill gas whose PIC response is independent of temperature over the 25°C to 500°C range must he found before the system could realis- tically be applied to power measurements in the now, more advanced KTGR and LMFBR reactors. Seeing that this is apparently the only remaining stuml lira block to the use of the PIC system for wide range reactor' power measurements in these reactors a concentrated effort to find a suitable gas should be launched. In conclusion, since new findings and advancement or the state-of- the-art, both of which have been accomplished here, are the essence of research, this was indeed a successful endeavor.

APPENDIX WP 9821 Codes The following HP9821 programs were 'ised to control the PIC system, redd and record data, perform data analysis, and finally output the data in plot form. PIC Sys tem Data R eco rding _Cod_e This code records the I , v(t ) and R/hr data used in this thesis. j s c 0; PRT "THIS PROGRAM" 1: PRT "RECORDS S,S. ;| 2: PRT " CURRENT VS. PIC" 3. PRT "VOLTAGE SIGNAL" PRT "DATA AND STORES" PRT "IT IN FILE" PRT "GIVEN," SPC 3 ENT "WTB NO. C--M0DE 1", R12 ENT "WTB NO. C-MODE ?.", R13 ENT "VOLT PULL SCALE", R7 ENT "VOLTS ZERO SCALE", R6 ENT "I FULL SCALE?", RIO ENT "I ZERO SCALE?" , R9 21 -> RIG; > R17 8.-,