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30/01/15 The fourth ARCHER Newsletter was released on 30 January 2015. Read online here

21/01/15 The second ARCHER EUROCOURSE, hosted by NRG, was held in Petten from 19-20 January 2015. Click here for more info

26/11/14 The third ARCHER Newsletter was released on 26 November 2014. Read online here

28/10/14 The ARCHER final meeting was held on 21-22 Jan 2015 at NRG in Petten (NL).

27/10/14 The High Temperature Reactor (HTR) Conference was held from 27-31 October 2014 in Weihai, Shandong Province, China. Click here for more info

29/03/14 The second Newsletter was released on 28 March 2014. Read online here

Supported by

European Commission


Portrait of a young scientist

Steven KnolSteven Knol, Consultant at NRG, was awarded with the "Outstanding Presentation Award for Young Researcher” at the HTR 2012 Conference in Tokyo, Japan. This prize is given to young researchers for their excellent presentation during the technical sessions.

We spoke with Steven about his role and involvement in the ARCHER project.

1. Could you briefly describe your role and responsabilities in the Archer project ?

Within ARCHER I am involved in Work Package 3 of the project. In this work package we investigate the behaviour of fuel both at the level of TRISO fuel particles and at the whole pebble level. It is all experimental work that we perform on particles and pebbles, which  have been irradiated in ARCHER's predecessor, the RAPHAEL project.

I mostly work on the PYCASSO post-irradiation examinations. The PYCASSO I and II experiments study the swelling behaviour of TRISO particle coating layers. A large number of surrogate coated particles (without UO2 kernels) have been irradiated, and now we will investigate them by using X-Ray Tomography. With this technique, you can study the thickness of the different coating layers while keeping the particles intact.

This will tell us something about the stresses that occur in the coatings during irradiation and will provide data that can be used for fuel performance codes. We will also prepare some particles for the University of Manchester for additional measurements.

2. What have you enjoyed most about your involvement in Archer ?

Collaboration with other institutes is very nice. It is interesting to cooperate and support each other in areas where we can add to each other’s capabilities. Next to that, I like the fact that HTR technology is quite close to industry and that the project is actually looking for end users or possible industrial interest. This is very motivating and makes you aware that the work we do is of real interest.

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