Speaker
Description
In 2018 ENSI, as Swiss competent authority for the transport of class 7 material and the licencing of storage casks, received a proposal for a new package design of a Dual Purpose Cask (DPC). This proposal comprises the request for a package approval and the request for a specific storage approval. The fulfilment of the requirements for transports according to SSR-6 and storage, which is described in the Swiss guideline ENSI-G05, is addressed in only one safety file in compliance with the IAEA TECDOC-1938. Therefore, the safety file was called integrated safety case (ISC) and the content is based on the PDSR-Guide as per IAEA SSG-66.
Following points were considered by ENSI for the first time in this way:
- The complete assessment of a Type B package according to SSR-6 Edition 2018. Usually, ENSI has issued package approvals based on the assessment and the licence of a foreign competent authority (country of origin). Therefore, a strategy for the assessment was created, considering the situation of ENSI.
- The new storage guideline ENSI-G05 was used the first time to issue a storage licence. The new guideline includes new requirements for the handling of the DPC.
- The fulfilment of all requirements on transport and storage was documented in only one safety case (ISC). Therefore, the strategy for the assessment was adapted and optimised.
During the project, ENSI identified several points and collected experience, especially the review and assessment of the integrated safety case, for example the dealing with the different criteria of transport and storage, the interaction of the different safety analysis for transport and storage, the optimisation of the assessment for both requirements, the assessment strategy including the integration of independent technical experts. The paper describes these aspects from the view of a competent authority.
