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UC1 sampling plan, liquid waste storage tanks, JRC Ispra

In this paper, deliverable 3.4 (D 3.4) is presented for WP 3, where the strategy developed in deliverables 3.1 (D 3.1) to 3.3 (D 3.3) is applied to the first of three reference use cases representative of existing decommissioning scenarios. | UC1 sampling plan liquid waste storage tanks JRC Ispra EPJ Nuclear Sci. Technol. 6 15 2020 Nuclear Sciences G. von Oertzen et al. published by EDP Sciences 2020 amp Technologies https doi.org 10.1051 epjn 2019043 Available online at https www.epj-n.org REGULAR ARTICLE UC1 sampling plan liquid waste storage tanks JRC Ispra Gunhild von Oertzen1 Olaf Nitzsche1 and Artur Hashymov2 1 Brenk Systemplanung GmbH Heider-Hof-Weg 23 52080 Aachen Germany 2 Energorisk Ltd. 141 No7 Simyi Steshenkiv str. Kiev Ukraine Received 21 June 2019 Received in final form 23 September 2019 Accepted 9 October 2019 Abstract. The objective of INSIDER work package 3 WP 3 is to draft a sampling guide for initial nuclear site characterization in constrained environments based on a statistical approach. In this paper deliverable 3.4 D 3.4 is presented for WP 3 where the strategy developed in deliverables 3.1 D 3.1 to 3.3 D 3.3 is applied to the first of three reference use cases representative of existing decommissioning scenarios. The present discussion focuses on use case 1 UC1 the liquid waste storage facility at the JRC site of Ispra Italy . The proposed characterization strategy developed in D 3.2 is applied in a step by step approach to analyse the pre-existing information obtained through the use of a pre-sampling questionnaire and to utilise the available inputs towards the development of a sampling plan sufficient for allowing radiological characterization. The proposed sampling plan follows a three-step approach i.e. determination of possible elevation in activity concentration by non-destructive testing biased sampling of layers identified and finally unbiased sampling after mixing of tank contents. 1 Introduction 1.2 Pre-characterisation questionnaire 1.1 Background A pre-characterisation questionnaire was used to deter- mine the historical background scope purpose and end The facility selected for the case study UC1 is the liquid points of the characterisation. This was sent to the Ispra