European Nuclear Society
e-news Issue 48 Spring 2015
http://www.euronuclear.org/e-news/e-news-48/sck-cen.htm

Important update for reactor BR2

SCK•CEN’s research reactor BR2 is to undergo a thorough maintenance and modernisation operation that will last until mid-2016. To guarantee its continued safe and efficient operation, various systems and components will be replaced as a precaution.

Like with any other major nuclear infrastructure in Belgium, reactor BR2 is subject to decennial safety assessments. In preparation for the upcoming assessment we started a systematic screening of the installation three years ago. During this screening, a risk analysis of all structures, systems and components of the BR2 was carried out, with particular attention given to the impact of ageing on safety. In addition, the impact of ageing on the availability and efficiency of BR2 was also screened.

In order to be able to use the reactor safely and efficiently in the coming period of 10 years, a preventive replacement of the beryllium matrix was required (see illustration). This matrix forms the heart of the reactor, and is composed of 79 channels, in which nuclear fuel elements, control rods and various experiments can be placed. At the same time, a number of preventive maintenance and modernisation activities have been defined. If we include the upgrade that took place in the late 1960s, this is now the fourth major maintenance and renovation of BR2 and the third replacement of the BR2 matrix to have taken place.

The discharge of the reactor will start in mid-March. This essentially means the removal of the fuel and the experimental set-ups. The current beryllium matrix will then be discharged. This operation will last until August 2015. After all the required inspections and verifications have taken place, the new matrix will be installed in the reactor at the start of 2016. The work that is necessary to make the reactor operational again will take a total of 16 months (until mid-2016), which marks the start-up date for the next operational period.

The BR2 reactor is an important producer of medical radioisotopes. SCK•CEN announced this operation in a timely way in order to give the international community of producers time to adapt their production planning accordingly. It is, therefore, unlikely that there will be any notable supply problems. The timing of the BR2 update has also been prompted by an expected drop in worldwide productive capacity from 2016, which means that SCK•CEN will be able to ensure a sustainable production of medical radioisotopes from then on.

More information about BR2: www.sckcen.be/nl/Research/Infrastructure/BR2

© European Nuclear Society, 2015