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      NEA report calls for more accurate data on SNF heat decay

      The OECD Nuclear Energy Agency has issued a report calling for more-detailed information on tracking the decay heat of spent nuclear fuel from light water reactors. According to the NEA, the report highlights the increasing importance of accurate decay heat estimations due to evolving fuel characteristics, including higher initial fuel enrichment, increased burn-up rates, and extended reactor cycle lengths.

      The report, Summary of the NEA Assessment on Spent Nuclear Fuel Decay Heat for Light Water Reactors, summarizes the findings of a subgroup of the NEA’s Working Party on Nuclear Criticality Safety (WPNCS), which ran from January 2022 to January 2024.

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TopFuel 2026

October 12–16, 2026

Tokyo, Japan


General Chair:

Takanari Ogata (Central Research Institute of Electric Power)

Program Chair:

Masahiko Osaka (Japan Atomic Energy Agency)

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