Development and application of temperature-dependent thermal neutron scattering data of light water for compensated neutron logging

Compensated neutron logging is often affected by log environmental temperature, thus it is necessary to do temperature correction for neutron log porosity by numerical simulation. In Monte Carlo simulation, the S(,)model of light water can only be used at some given temperature. Based on the principle of thermal neutron scattering，the frequency spectra of interpolation with different temperature and the latest release of version VII of Evaluated Nuclear Data File(ENDF/B-VII.1), a new fine ACE(a compact ENDF) formatted thermal neutron scattering database of light water was developed by NJOY99 code. The validation of data were done by a suite of criticality benchmarks, it is concluded that the results of benchmarks, the existing database and the newly developed database are in good agreement. A good result was achieved in temperature correction of well-logging data with the new database.