CTBT: Science and Technology Conference 2023 - SnT2023

Session

O2.4 Atmospheric and Subsurface Radionuclide Background and Dispersion

O2.4

20 Jun 2023, 16:35

Prinz Eugen Saal

Conveners

O2.4 Atmospheric and Subsurface Radionuclide Background and Dispersion

• Jolanta Kusmierczyk-Michulec (CTBTO Preparatory Commission)
• Man-Sung Yim (Korea Advanced Institute of Science and Technology (KAIST))
• Jonathan Bare (CTBTO Preparatory Commission)

59. Revisiting What a Variety of Tracers can tell about the Occurrence of Underground Nuclear Explosions (O2.4-059)

Pierre Adler (Sorbonne Université)

20/06/2023, 16:40

T2.4 Atmospheric and Subsurface Radionuclide Background and Dispersion

Oral

Underground nuclear explosions induce a strong flow of air through the surrounding fractured porous media, which carries radionuclides or chemical species. While radioxenon and 37Ar represent tracers scrutinized by the International Monitoring System and On-Site Inspection, respectively, a larger variety of tracers is emitted at the ground surface: radioxenon and heat generated by the...

393. Potential Impact of Molten Salt Reactors on Radionuclide Stations of the International Monitoring System (O2.4-393)

Johnathan Slack (Pacific Northwest National Laboratory (PNNL))

20/06/2023, 16:55

T2.4 Atmospheric and Subsurface Radionuclide Background and Dispersion

Oral

Molten Salt Reactors (MSRs) are a Generation IV nuclear reactor design that is currently under development and testing in various countries around the world. The molten fuel provides an opportunity for continuous processing of gaseous fission products which may impact the International Monitoring System (IMS). Simulations were performed for four MSR designs to predict the production of...

497. Evaluation of the Phase II Test of Xenon International on Mount Schauinsland - What can be Gained from Higher Sensitivities and Shorter Sampling Periods? (O2.4-497)

Ms Sofia Brander (Federal Office for Radiation Protection (BFS))

20/06/2023, 17:10

T2.4 Atmospheric and Subsurface Radionuclide Background and Dispersion

Oral

We will review data from Phase II testing of Xenon International at RN33. Xenon International is a new generation radioxenon monitoring system developed by PNNL with a short sampling time of 6 hours. Phase II testing of Xenon International was conducted from July 2021 to April 2022 at International Monitoring System (IMS) radionuclide monitoring station RN33 on Mount Schauinsland, Germany....

549. Solution of the National Data Center Preparedness Exercise 2019 by Using Inverse Atmospheric Transport Modelling (O2.4-549)

Mr Sayed Mekhaimer (National Research Institute of Astronomy and Geophysics (NRIAG))

20/06/2023, 17:25

T2.4 Atmospheric and Subsurface Radionuclide Background and Dispersion

Oral

The National Data Center Preparedness Exercise 2019 (NPE- 2019) provides an opportunity to evaluate the ability of the National Data Center (NDC) to use available International Monitoring System (IMS) data, techniques, and tools to verify compliance with the Comprehensive Nuclear-Test-Ban Treaty. In NPE-2019, there are unusual detections of radioactive particulates (Cs-134, Cs-137, La-140, and...

846. Argon-37 Field System Measurements (O2.4-846)

Mr James Hayes (Pacific Northwest National Laboratory (PNNL))

20/06/2023, 17:40

T2.4 Atmospheric and Subsurface Radionuclide Background and Dispersion

Oral

This presentation will highlight background measurements of Ar-37 samples that were conducted at in Knoxville, Tennessee, USA to better understand the sources of atmospheric concentrations of Ar-37 using the Argon-37 Field System. The PNNL designed and built Argon-37 Field System has now processed and measured several hundred Ar-37 samples from both the soil gas and from the atmosphere. The...