As the nuclear industry grows around the globe, it brings with
it a need for more safeguards and proliferation resistant
technologies. Tags and seals are an area where innovation has been
relatively stagnant for the past fifteen years.
Seals are used to maintain the integrity of monitoring
enclosures, containers, or perhaps a point of entry. A gap analysis
has been completed for passive and active seals currently being
used by the IAEA. Several shortcomings of various seals were
identified as areas where improvements could be made. In addition,
technologies not previously applied to the areas of tags and seals
were evaluated for potential use in these applications. These "new"
technologies must meet the existing functional requirements and
also fill the voids found in current devices. Several of these
"new" technologies were selected for further evaluation of
implementation feasibility. A promising material to be used in the
next generation of seals is stressed glass due to its relatively
inexpensive cost, high strength, and potential use in a variety of
applications. Furthermore, using ion exchange, complex shapes of
glass can be chemically stressed for specific applications.
This process is being considered to be used in conjunction with
already existing technologies such as reflective particles. These
particles can be contained in adhesive between two pieces of glass,
or in the glass matrix if they are added during the fabrication
process. This allows for the glass to be cut into the correct shape
and then undergo the ion-exchange process. This process increases
the strength of the glass and gives it unique fracture
characteristics when subjected to a point load. The final product
will have both identification and authentication features difficult
for an adversary to replicate or defeat. The feasibility of
combining these two technologies into an inexpensive and secure
seal technology will be demonstrated with a proof of concept
- R. Ghanbari, K.M. Tolk, W.S. Charlton,
"Exploration of Ion-Exchanged Glass for Seals Applications,"
Proceedings of the INMM 52nd Annual Meeting, Palm Desert, CA, July 17-21, 2011. See Document
- R. Ghanbari, K. Tolk, and W.S. Charlton,
"Exploration of Ion-Exchanged Glass for Seals Application,"
33rd ESARDA Annual Meeting: Symposium on Safeguards and Nuclear Material Management, May 16–20, 2011, Budapest, Hungary. See Document
Semitransparent overlay of two fracture pattern images created using the MATLAB