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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Joint NEA project performs high-burnup test
An article in the OECD Nuclear Energy Agency’s July news bulletin noted that a first test has been completed for the High Burnup Experiments in Reactivity Initiated Accident (HERA) project. The project aim is to understand the performance of light water reactor fuel at high burnup under reactivity-initiated accidents (RIA).
H. H. Nichols
Nuclear Technology | Volume 9 | Number 1 | July 1970 | Pages 112-119
Instrument | Symposium on Theoretical Models for Predicting In-Reactor Performance of Fuel and Cladding Material | doi.org/10.13182/NT70-A28733
Articles are hosted by Taylor and Francis Online.
The integral gamma-ray counting efficiency was measured for six CdTe detectors using gammas from 57Co, 85Kr, 137Cs, and 60Co. Changes in efficiency were measured as a function of temperature (-50 to 66°C), detector bias (50 to 100 V), pulse clipping time (0.25 to 1.6 µSec), and energy threshold setting (25, 50, 75, and 100 keV). The change is mainly due to trapping and detrapping of charge carriers. For a clipping time of 1 µ sec, changes in efficiency tiS high as 300% were observed over the temperature range -50 to 66°C. This change in efficiency was reduced to <10% by using only the fast component of the pulses generated. Total gamma-ray efficiency approaching the theoretical limit was measured at 23°C. Presently, CdTe detectors are not intended for use as spectrometers, but are intended to be used as gamma-ray counters over a wide temperature range.
