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AGA: Arbeitsgruppe Physik und Abrüstung

AGA 5: Nuclear Verification, Iran, Comprehensive Test Ban Treaty

AGA 5.2: Vortrag

Freitag, 18. März 2022, 11:15–11:45, AGA-H19

Onsite Verification of the Comprehensive Nuclear Test Ban Treaty at Very Low Yields — •Christopher Fichtlscherer^1,2, Julien de Troullioud de Lanversin³, and Frank N. von Hippel⁴ — ¹RWTH Aachen, Aachen, Germany — ²IFSH, Hamburg, Germany — ³Harvard University, Cambridge, U.S. — ⁴Princeton University, Princeton, U.S.

The United States has accused Russia and suspects China of violating the Comprehensive Nuclear Test Ban Treaty (CTBT) at very low yields. They argue that the violating tests involve supercritical chain reactions that are forbidden under the U.S. interpretation of the treaty. Satellite images could show suspiciously large containment vessels being emplaced in tunnels. But offsite, there would be no detectable physical evidence to differentiate such tests from permitted subcritical tests. However, during onsite inspections, gamma emissions from the fission and neutron-activation products in the containment vessel could be measured to infer the energy released through fission during the test. Here a potential verification onsite measurement method is presented and tested in a theoretical scenario using the open-source OpenMC transport and ONIX depletion code.