[3] P1: Center of Glory Hole; P2: Core Surface (11.3 cm from Core Center); P3: 1 meter from Core Center. Table IV. Nominal APRFR Leakage and U235 Fission Spectra[4] -------------------------------------------------------- Energy Average APRFR U235 Fission Group Energy Energy Spectrum Spectrum Number Range Eₙ Fraction Fraction n (Mev) (Mev) XₙΔEₙ XₙΔEₙ -------------------------------------------------------- 1 3.0-∞ 4.41 0.133 0.204 2 1.4-3.0 2.10 0.251 0.344 3 0.9-1.4 1.14 0.164 0.168 4 0.4-0.9 0.65 0.262 0.180 5 0.1-0.4 0.26 0.168 0.090 6 0-0.1 0.059 0.022 0.014 ------------------- SUM 1.000 1.000 ------------------- Mean Energy (Mev) ~1.55 ~1.8 [4] These values are approximate and meant for qualitative comparison only. Table V. Fluence-to-Dose Conversion Factors for APRFR Leakage Neutrons -------------------------------------------------------------------- Material Quantity Conversion Factor -------------------------------------------------------------------- Tissue Kerma 2.4 × 10⁻⁷ erg/gram ----------- neutron/cm² Tissue Maximum Absorbed Dose For 3.5 × 10⁻⁹ rad ----------- neutron/cm² Normally Incident Neutrons Silicon Elastic Recoil Kerma 2.7 × 10⁻⁹ erg/gram (~Permanent Effect) ----------- neutron/cm² Silicon Ionization Kerma 2.9 × 10⁻⁹ erg/gram (~Transient Effects) ----------- neutron/cm² Silicon (Total) Kerma 5.6 × 10⁻⁹ erg/gram ----------- neutron/cm² -------------------------------------------------------------------- Table VI. Kerma and Kerma Rate in Tissue for APRFR Exposure Conditions