Problems of DPA cross-sections above 20 MeV in FENDL-3.1d found in A-FNS neutronics analysis

Figures & data

Figure 1. Neutronics calculation model of A-FNS

Figure 2. Calculated neutron and DPA spectra for iron in A-FNS (*fpy: full power year)

Figure 3. DPA cross-sections of iron isotopes in FENDL-3.1d

Figure 4. ⁵⁶Fe production yield in ⁵⁶Fe of FENDL-3.1d

Figure 5. DPA cross-sections of original and revised ⁵⁶Fe data

Figure 6. DPA cross-sections of ⁸⁹Y and ¹⁰⁷Ag (sharp spike near 20 MeV)

Table 1. The problems of FENDL-3.1d data from TENDL-2010 or TENDL-2011

Problem	Reason	Material
Sharp negative spike	Negative residual nucleus production yield at 20.00001 MeV	^10B, ^32S, ^160Gd, ^176Hf
Large peak	Extremely large residual nucleus production yield at 20.00001 MeV	^79Br, ^112Sn, ^133Cs, ^167Er, ^175Lu, ^179Hf, ^180Hf
Sharp spike	Zero residual nucleus production yield at 20.00001 MeV	^11B, ^15N, ^17O, ^33S, ^50V, ^56Fe, ^81Br, ^89Y, ^107,109Ag, ^106,108,110−114,116Cd, ^114−120,122,124Sn, ^121,123Sb, ^130,132,134−138Ba, ^136,138,140,142Ce, ^152,154−158Gd, ^162,164,166,168,170Er, ^176Lu, ^174,177,178Hf, ^185,187Re, ^190,192,194−196,198Pt

Figure 7. DPA cross-sections of ³²S and ¹⁶⁰Gd (sharp negative spike near 20 MeV)

Figure 8. DPA cross-sections of ⁷⁹Br and ¹³³Cs (large peak near 20 MeV)

Figure 9. KERMA factors of ³²S, ¹⁶⁰Gd, ⁷⁹Br, and ¹³³Cs (same problem as DPA cross-section)

Figure 10. DPA cross-sections of ⁹³Nb in FENDL-3.1d, original ENDF/B-VII.1 (org.), modified ENDF/B-VII.1 (mod.), JEFF-3.3, and JENDL-4.0/HE

Figure 11. DPA cross-sections of ⁴⁵Sc in FENDL-3.1d, JENDL-4.0, and JEFF-3.3

Figure 12. Partial DPA cross-sections of ⁴⁵Sc in JEFF-3.3 and FENDL-3.1d; total, elastic scattering, inelastic scattering, and disappearance reaction

Figure 13. Cross-sections of inelastic scattering of ⁴⁵Sc in JEFF-3.3 and FENDL-3.1d

Figure 14. NJOY2016 output of ⁴⁵Sc; the parts of bold and italic font are wrong damage energy production values

Figure 15. A part of the energy distribution data of recoil nucleus in the inelastic scattering to continuum states (file = 6, mt = 91) in ⁴⁵Sc of FENDL-3.1d and JEFF-3.3

Table 2. Summarized results

Energy region	Problem of DPA cross section	Number of nuclei		Source data
Above 20 MeV	Sharp negative spike	4	74	OLD TENDL data (TENDL-2010, 2011)
	Large peak	7
	Sharp spike	63
	Sharply small	49		JENDL/HE-2007
Above several MeV	Much smaller	13		JEFF-3.1.1