DocumentCode :
2540722
Title :
Tritium inventory measurement by beta scintillation detection
Author :
Ellefson, R.E. ; Price, B.R. ; West, D.S.
Author_Institution :
Ellefson Anal. Services, Centerville, OH, USA
Volume :
2
fYear :
1995
fDate :
30 Sep-5 Oct 1995
Firstpage :
1018
Abstract :
A new design for a beta scintillation detector (BSD) has been developed for measurement of tritium partial pressure and total-tritium concentration in HDT-He process samples. The tritium beta energy deposited in the CaF2[Eu] scintillation crystal produces light that is measured by a photodiode and electrometer producing an output voltage linearly proportional to the partial pressure of tritium. Mole percentage of tritium in unknown and standard samples is calculated from the ratio of BSD tritium partial pressure to the total sample pressure measured by a capacitance diaphragm gauge. Daily calibration to determine a new sensitivity S[V/Torr-T2] using a single standard HDT-He mixture produces analyses with errors typically less than 1.3 percent of value as determined by analysis of other standard mixtures over a one year period. This error of tritium measurement is monitored with a measurement control program at Los Alamos to assure accuracy for all tritium inventory samples measured by this method
Keywords :
beta-ray detection; fusion reactor fuel; solid scintillation detectors; tritium; tritium handling; CaF2:Eu; CaF2:Eu scintillation crystal; T2; beta scintillation detection; capacitance diaphragm gauge; measurement control program; output voltage; total-tritium concentration; tritium inventory measurement; tritium partial pressure; Calibration; Capacitance measurement; Energy measurement; Error analysis; Measurement standards; Photodiodes; Pressure measurement; Scintillation counters; Solid scintillation detectors; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Fusion Engineering, 1995. SOFE '95. Seeking a New Energy Era., 16th IEEE/NPSS Symposium
Conference_Location :
Champaign, IL
Print_ISBN :
0-7803-2969-4
Type :
conf
DOI :
10.1109/FUSION.1995.534398
Filename :
534398
Link To Document :
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