SEDL / STP / STP1550-EB / STP155020120018

Application of Different Nuclides in Retrospective Dosimetry

Konheiser, J.
Dresden,

Mittag, S.
Dresden,

Viehrig, H. -W.
Dresden,

Gleisberg, B.
Verein für Kernverfahrenstechnik und Analytik Rossendorf e.V. (VKTA), Dresden,

Pages: 10    Published: Aug 2012

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Abstract

The activities of nuclides produced via the neutron irradiation of reactor pressure vessel (RPV) steel are used to validate respective fluence calculations. Niobium, nickel, and technetium isotopes from RPV trepans of the decommissioned NPP Greifswald (VVER-440) have been analyzed. The activities were determined by TRAMO (Monte-Carlo) fluence calculations, newly applying 640 neutron-energy groups and ENDF/B7 data. Relative to earlier results, fluences up to 20 % higher have been computed, leading to somewhat better agreement between measurement and calculation, particularly in the case of Tc-99.