Archive for the ‘Nucleonica’ Category

Application loading and running times

June 12th, 2019

Working with Nucleonica the user may notice differences in the loading times not only between different applications but also for the same application loaded at different times. Analogously the execution time of a given application and for the same calculation may vary over time.

In particular, after a maintenance or new deployment operation on the server the different memory caches are empty and the first call to an application may take significantly longer than a second or further calls to that application issued from the same or another user. The same is true for calculations involving intensive database operations such as gamma spectrum modelling or calculation of a large decay trees with lots of fission products.

Clearly different applications use more or less data generally retrieved from the underlying databases. The CPU time needed to prepare the data depends on the activity level on the server but can generally be neglected except when extensive calculations are involved. The transmission time over the net is proportional to the data amount to be transmitted and depends on many factors like the location of the client, the quality of the connection or the time of day. The time needed to load the data from the database in turn depends on whether the data are read from the disk or retrieved from the memory cache which is much faster than a disk operation.

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New publication on the Karlsruhe Nuclide Chart

May 27th, 2019

Obtaining nuclear data is an international activity with new and updated data constantly being determined by thousands of scientists at major research centres worldwide. Because of the large amounts of data generated and the formats used to store these data, the field of nuclear data is highly specialised. To make the most important key data more accessible to a wider audience, nuclide charts have been developed. In this publication, we present the scientific highlights of the new 10th Edition of the Karlsruhe Nuclide Chart.
Fig1epjn The main focus of this Chart is to provide structured, accurate information on the half-lives and decay modes, as well as energies of the emitted radiation for over 4000 experimentally observed ground states and isomer nuclides to an interdisciplinary audience.

More information…
Karlsruhe Nuclide Chart – New 10th edition 2018, EPJ Nuclear Sci. Technol.
Volume 5, 2019
(pdf)
New 10th Edition (2018) of the Karlsruhe Nuclide Chart
Karlsruhe Nuclide Chart Online Shop

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New Short Names for Nucleonica Apps

April 30th, 2019

Nucleonica applications are represented as “tiles” in the App Portal. For every application there is a tile consisting of a header “Short Name” and a body “Full Name”. As an example, in the image below, the short name GSG refers to the application Gamma Spectrum Generator++.
To make the tile names more intuitive, new “Short Names” have been introduced for many Apps. These are shown in the image below for the filter category “last used”.
NewShortNames2As can be seen the new short names are more intuitive than the older names e.g. Datasheet (old name NuDat++), Explorer (Expl++), decay (DE++), Search (NuS/RaS). It should be noted that the Radiological Converter and Mass Activity Converter new short names are Conv. Pro and Conv. respectively. The gamma library apps have also been renamed to gLib Pro and gLib. The gamma dosimetry and shielding apps have the new short names gH*(10) and gD&S.

More info…
App Portal wiki page

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Nuclear Security Exercises now available to all Nucleonica users

March 28th, 2019

In Nucleonica’s e-Learning center (e-Learn app), a series of nuclear security exercises has been released for all Nucleonica users.
eL-NSENucleonica’s e-Learning Centre showing the nuclear security exercises.

These exercises have been developed jointly with Dr. Emily Alice Kröger from the Federal Office for Radiation Protection (Bundesamt für Strahlenschutz) and the Nucleonica Team. The exercises were developed for use in BfS training courses on Nucleonica held on a regular basis. Because of the general interest in these presentations, we have released them for general use by Nucleonica users.

More info…
Nucleonica’s e-Learing Centre

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webKORIGEN and DELNuS updates

March 26th, 2019

WebKORIGEN is a Nucleonica application for the simulation of the time evolution of a nuclide inventory in power reactors. A related application, DELNuS (Decay Engine for Large Nuclide Sets), allows the user to make decay calculations for a large number of nuclides (typically present in a reactor).
Following a new compilation (2019), a number of updates and improvements in the webKORIGEN and DELNuS applications have been made:
webKORIGEN:
– it is now possible to make Ra226 irradations in the flux mode.
– new tabs show the cross section data (also burnup dependent ) and decay data used in the calculations for the various reactor types.
– in the results grid, nuclide half-lives have been added
wKOwebKORIGEN user interface

DELNuS
– a problem with using mixtures in DELNuS has been resolved.
– in the results grid, the nuclide half-lives have been added
– decay data used in the calculations are displayed
DELNuSDELNuS user interface

More info…
webKORIGEN
Neutron irradiation with webKORIGEN
DELNuS

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World’s oldest periodic table chart found in St Andrews

January 22nd, 2019

A periodic table discovered at the University of St Andrews is thought to be the oldest in the world. Following Menedleev’s famous discovery of periodicity in the chemical elements in 1869, a number of such periodic tables were created. The St. Andrews periodic table is similar to Mendeleev’s second table from 1871. Original_PT2Periodic Table discovered at St. Andrews University, Scotland (Courtesy St. Andrews University).
The United Nations has designated 2019 as the international year of the Periodic Table of chemical elements, recognizing it as an instrument ‘central to linking cultural, economic and political aspects of the global society through a common language’.

More info…
St. Andrews University News
Article in Der Spiegel (in German)
United Nations Year of the Periodic Table

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Karlsruhe Nuclide Chart (Contour Chart) at URENCO, Netherlands

January 14th, 2019

Nucleonica has arranged the installation of a “contour” version of the Karlsruhe Nuclide Chart at the URENCO premises in Almelo, Netherlands.
The Chart was produced using a 4mm Dibond aluminium plate “cut-out” to fit in a space of height 2m and width 5m and assembled a small distance from the wall. The text is cut from adhesive foil and glued directly on the wall.
UERENCO_KNC_2018Karlsruhe Nuclide Chart (Contour Chart) at the URENCO premises in the Netherlands, Courtesy URENCO. For further information, contact info@nucleonica.com.

More information…
Other print versions of the Karlsruhe Nuclide Chart
Nuclide Charts
Contour Nuclide Chart for European Dialogue Centre

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Nucleonica Newsletter 2019

January 6th, 2019

Dear Nucleonica Users,
Hopefully you had a great start into the New Year, and we wish you every success in 2019. For the Nucleonica Team, a major focus over the past year was the development and improvement of new and existing applications. Detailed information on these activities is described in this Newsletter.
A highlight in 2018 was the launch of the new 10th Edition of the Karlsruhe Nuclide Chart in early 2018. You can order your copy here.
A further highlight was the development of a new online e-Learning Training Centre, making the Nucleonica product knowledge more transparent and accessible.
NN2019The Nucleonica Team would like to thank you for your continued support.
Best wishes for 2019, Sincerely yours,
Joseph Magill, Managing Director

More information…
Nucleonica Newsletter 2019
Previous Newsletters
Nucleonica Newsletter 2018
Nucleonica Newsletter 2017
Nucleonica Newsletter 2016
Nucleonica Newsletter 2015
Nucleonica Newsletter 2014
Nucleonica Newsletter 2013
Nucleonica Newsletter 2012

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Neutron dose rate app extended to reference neutron sources

December 13th, 2018

The neutron dose rate application, previously restricted to monoenergetic neutrons, has been extended to include the spectrum averaged ambient dose equivalent coefficients for common neutron sources. This allows the user to calculate ambient dose rates for the following reference radionuclide neutron sources:
– Cf252;
– Cf252 (D2O moderated);
– Am241-B; and
– Am241-Be
NDR_2 In the example above, the neutron dose rate for 1 g Cf-252 at 1 m is 2.65e7 µSv/h and results from a neutron source strength of 2.40e12 neutrons s-1 at the source and 1.91e7 neutrons cm-2 s-1 at 1 m distance from the source.

More information…
– Neutron Dose Rate application wiki page
– Reference neutron radiations — Part 1: Characteristics and methods of production, ISO 8529-1:2001, 2001. Link. See also … link
– Neutron Shielding for a 252Cf Source. Link

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ENDF/B-VIII.0 (2018) decay data now available in Nucleonica

November 30th, 2018

On February 2, 2018, CSEWG released its latest revision of the ENDF/B library, ENDF/B-VIII.0.
The ENDF/B-VIII.0 (2018) decay data sublibrary is now available in Nucleonica in addition to the previously used decay data library JEFF3.1, and EBDF/B-VII.1. It is now possible to compare and contrast the main European (JEFF3.1) and American (ENDF/BVII.1, ENDF/B-VIII.0) data libraries for differences in half-lives, branching ratios, energies and emission probabilities of the emitted radiations, etc. using Nucleonica’s user friendly tools. This data comparison can be accessed through the Options tab of the Nuclide Datasheets++ application.ENDFB8

More info…
ENDF/B-VIII.0
ENDF/B-VIII.0 Evaluated Nuclear Data Library

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