Aiming at economical optimization, the characterisation of the biological shield of the Belgian Reactor 3 is one of the three use cases intended to validate the integrated characterization methodology developed within the INSIDER project. | INSIDER UC2 the BR3 biological shield preliminary results and future work EPJ Nuclear Sci. Technol. 6 14 2020 Nuclear Sciences W. Broeckx et al. published by EDP Sciences 2020 amp Technologies https epjn 2019054 Available online at https REGULAR ARTICLE INSIDER UC2 the BR3 biological shield preliminary results and future work Wouter Broeckx Bart Rogiers Nico Mangelschots Ronny Vandyck Greet Verstrepen and Sven Boden Belgian Nuclear Research Centre SCK CEN Boeretang 200 2400 Mol Belgium Received 15 May 2019 Received in final form 24 October 2019 Accepted 6 November 2019 Abstract. Aiming at economical optimization the characterisation of the biological shield of the Belgian Reactor 3 is one of the three use cases intended to validate the integrated characterization methodology developed within the INSIDER project. Pre-existing data were used to define the sampling design strategy. The additional sampling and analysis program consisted of total gamma measurements at the inner surface of the biological shield secondary data and gamma spectrometry measurements on drill core samples primary data . The newly acquired data is supplemented with the historical available data. The full data set currently consists of a total of 283 secondary and 379 primary data points. Preliminary calculations already provide a clear-cut representation of the three different end-stage classes unconditional clearance conditional clearance and radioactive waste. On the short term the current model will be further refined and completed with proper risk evaluation. On the longer term we envisage a global uncertainty calculation and sensitivity analysis of the entire process. 1 Introduction Constraints are related to typical nuclear safety issues radiation and contamination hazards and in addition to The EURATOM work program project INSIDER Im- access limitations and classical safety hazards. Due to proved Nuclear SIte characterization for waste minimiza- planning and
