Abstract
Potential of DT fusion neutron source to enhance proliferation resistance properties of plutonium by means of its isotopic denaturing is addressed. The approach is exemplified by denaturing of pure 239Pu and plutonium of typical LWR spent fuel through transmutation of neptunium. The essential feature of a fusion driven system proposed in the study is a zero mass balance of plutonium: total plutonium inventory is constant during irradiation. The system is capable to convert pure 239Pu into plutonium composition with more than 20% fraction of key 238Pu isotope during 1,000 d of irradiation under initial neutron loading of 1 MW.m−2. Denaturing of LWR spent fuel plutonium under the same conditions would increase its 238Pu content up to 10-12%.
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