Archive for October, 2019

e-Ship++ now with Transport Security Thresholds

October 17th, 2019

The e-Ship++ application has been extended to monitor the transport security threshold of high consequence dangerous goods. A warning is generated in the transport report when the threshod is exceeded.
The transport of high consequence dangerous goods needs special attention as described in the ADR section 1.10.3 (pp. 100 – 103)
High consequence dangerous goods are those which have the potential for misuse in a terrorist event and which may, as a result, produce serious consequences … particularly for goods in Class 7
For Class 7 goods, high consequence radioactive material is that with an activity equal to or greater than a transport security threshold of 3000 A2 per single package except for specific radionuclides.
TST5Example of the warning shown when a package reaches the threshold for high consequence radioactive material.

More information…
High consequence dangerous goods
– e-Ship++ wiki page on Transport Security Threshold

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Gamma Spectrum Generator for large nuclide inventories?

October 15th, 2019

(Qu.) AM, Linköping University, Sweden
Dear Nucleonica Team,
We work with a mixture of about 900 radionuclides. We would like to generate corresponding gamma spectra using the Gamma Spectrum Generator++, but the generator allows to work with no more than 20 nuclides in the mixture. Is there a way how to increase this number? Would a standalone application help? It would be a bit laborious to split the 900 nuclides to 45 groups, process each group individually and then combine the results.

(Ans. Nucleonica Team)
Depending on your requirements, it may not be necessary to use the Gamma Spectrum Generator, GSG (which is as you say restricted to 20 nuclides). A spectrum can be obtained using the Gamma Dosimetry & Shielding, D&S H*(10) application. This line spectrum is obtained using the activities, emission probabilities and the energies of the emitted radiation. This may be sufficient for your purposes. It does not include peak broadening, Compton scattering and background scattering as in the GSG. The advantage of using the D&S H*(10) is that it is can handle 900 nuclides with a reasonable calculation time (typically a few seconds).
If you require the full GSG spectrum with line broadening, Compton scattering etc. You will need to use one of our test servers for this purpose. There a GSG spectrum for approx. 900 nuclides (with around 28000 gamma lines) will require a calculation time of approx. 20 mins. The Nucleonica Team can provide more information on our test servers.

Once you have the GSG spectrum for the 900 nuclides, you can save this in XML format. This xml file can then be uploaded into the webGraph application. Using the xml files in webGraph provides therefore an “Active” graph which can be used for later viewing and examination. With the Active graph the user can zoom in and out and use the mouse cursor to identify the underlying nuclides.

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