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Calculation of gamma and neutron emission characteristics emitted from fuel debris as a basis for determination of suitable detector system

Riyana, E. S.; 奥村 啓介; 寺島 顕一

Riyana, E. S.; Okumura, Keisuke; Terashima, Kenichi

Determination of fuel debris location and distribution inside primary containment vessel (PCV) of Fukushima Daiichi Nuclear Power Station is important to decide further decommissioning step and strategy. Past measurements not yet provide enough information to determine fuel debris location and its distribution inside PCV. To support further measurements effort, we simulate detector response inside PCV based on calculated photon and neutron emission spectrum produced from fuel debris. The Calculation result could be use as basis for determination of suitable spectrometer system or detector for search, localized, define fuel debris distributions and treatment of fuel debris.

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