This repository stores the data analysed within the paper: Article Title: Nuclear data evaluation for decay heat analysis of spent nuclear fuel over 1-100 k year timescale DOI: 10.1140/epjp/s13360-022-02865-7 Editorial manuscript number: EPJP-D-22-00899R1 An overview of each excel spreadsheet is given below: Figure1: raw data for Figure 1 plotting Total Decay Heat on log scale (W/t) [column B] versus Cooling time on log scale (years) [column D]. Figure2: raw data for Figure 2 plotting a stacked histogram of chosen radionuclides percentage heat contribution (%) [columns B - X] versus Cooling time on log scale (years) [column A]. Table1: raw data depicting Half-lives (s) of desired radionuclides from nuclear databases JEF2.2, JEFF3.1.1, JEFF3.3, ENDF/B-VIII.0, ENSDF and DDEP. Table2: raw data depicting Alpha Energies (keV) of desired radionuclides from nuclear databases JEF2.2, JEFF3.1.1, JEFF3.3, ENDF/B-VIII.0, ENSDF and DDEP. Table3: raw data depicting Beta Energies (keV) of desired radionuclides from nuclear databases JEF2.2, JEFF3.1.1, JEFF3.3, ENDF/B-VIII.0, ENSDF and DDEP. Table4: raw data depicting total discrete electron energies - conversion and auger electrons - (keV) of desired radionuclides from nuclear databases JEF2.2, JEFF3.1.1, JEFF3.3, ENDF/B-VIII.0, ENSDF and DDEP. Table5: raw data depicting Gamma energies (keV) of desired radionuclides from nuclear databases JEF2.2, JEFF3.1.1, JEFF3.3, ENDF/B-VIII.0, ENSDF and DDEP. Table6: raw data depicting X-ray energies (keV) of desired radionuclides from nuclear databases JEF2.2, JEFF3.1.1, JEFF3.3, ENDF/B-VIII.0, ENSDF and DDEP. Table7: raw data depicting Cumulative fission yields due to 235U of desired radionuclides from nuclear databases JEF2.2, JEFF3.1.1, JEFF3.3 and ENDF/B-VIII.0. Table8: raw data depicting Thermal neutron capture cross sections of desired radionuclides from nuclear databases JEF2.2, JEFF3.1.1, JEFF3.3, ENDF/B-VIII.0 and ENSDF. Table10: raw data depicting Cumulative fission yields due to 239Pu of desired radionuclides from nuclear databases JEF2.2, JEFF3.1.1, JEFF3.3 and ENDF/B-VIII.0. Table11: raw data depicting Independant fission yields due to 235U of desired radionuclides from nuclear databases JEF2.2, JEFF3.1.1, JEFF3.3, ENDF/B-VIII.0 and ENSDF. Table12: raw data depicting Independant fission yields due to 239Pu of desired radionuclides from nuclear databases JEF2.2, JEFF3.1.1, JEFF3.3, ENDF/B-VIII.0 and ENSDF.