Consideration of aging mechanism influence on transport safety of dual purpose casks for spent nuclear fuel or HLW

Droste, Bernhard; Komann, Steffen; Wille, Frank; Rolle, Annette; Probst, Ulrich; Schubert, Sven

doi:10.1179/1746510914y.0000000070

Cited by 3 publications

(11 citation statements)

References 6 publications

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“…The current level of safety in the transport of radioactive material has been achieved on a worldwide basis through adoption of the Transport Regulations in international, regional and modal regulations for the transport of all dangerous goods, in which radioactive material is just one (Class 7) of the nine classes of dangerous goods. Related publications explain the Transport Regulations and provide advice on how they may be applied and cover topics such as emergency response, compliance assurance, management system and schedules of provisions in greater detail in Refs [5][6][7][8].…”

Section: List Of Tablesmentioning

confidence: 99%

“…228.1. The term 'management system' is defined in the IAEA Safety Glossary [7] and reflects and includes the concept of 'quality control' (controlling the quality of products) and its evolution through 'quality assurance' (the system for ensuring the quality of products) and 'quality management system' (the system for managing quality). The management system is aimed at providing adequate confidence that the standard of safety prescribed in the Transport Regulations is achieved in practice.…”

Section: Management Systemmentioning

confidence: 99%

See 1 more Smart Citation

Advisory Material for the IAEA Regulations for the Safe Transport of Radioactive Material (2018 Edition)

2022

IAEA Safety Standards Series

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This Safety Guide provides recommendations and guidance on achieving and demonstrating compliance with IAEA Safety Standards Series No. SSR-6 (Rev. 1), Regulations for the Safe Transport of Radioactive Material (2018 Edition), which establishes the requirements to be applied to the national and international transport of radioactive material. Transport is deemed to comprise all operations and conditions associated with and involved in the movement of radioactive material, including the design, fabrication and maintenance of packaging, and the preparation, consigning, handling, carriage, storage in transit, shipment after storage and receipt at the final destination of packages. The Advisory Material is not a stand-alone text. It is to be used concurrently as a companion to the IAEA Safety Standards Series No. SSR-6 (Rev. 1) and each paragraph of this guide is numbered correspondingly to the paragraph of the Regulations to which it most directly relates.

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Section: List Of Tablesmentioning

confidence: 99%

Section: Management Systemmentioning

confidence: 99%

Advisory Material for the IAEA Regulations for the Safe Transport of Radioactive Material (2018 Edition)

2022

IAEA Safety Standards Series

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“…The cask's outer part has a high mechanical durability and shields ionizing radiation. A dual lid system guarantees the secure closure of the spent fuel assemblies (Droste et al, 2014). Inside the cask, there are gaps even in the closed state due to manufacturing, assembly and use.…”

Section: Dual Purpose Casksmentioning

confidence: 99%

Accelerated Parameterized Computation of the Thermal Behaviour of Dual Purpose Casks

et al. 2021

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One of the fundamental requirements for dual purpose casks, which are used for the transport and interim storage of spent fuel assemblies, is the safe removal of the resulting decay heat. To ensure this the temperature fields are determined using numerical methods. However, their modelling is complex and the computation time-consuming.In order to accelerate this thermal assessment, we have developed z88ENSI, an independent simulation tool based on finite element analysis. With regard to the modelling, various parameters can be varied quickly with our newly designed mesh manipulation procedure. Concerning the computation time, we developed and implemented an approach for calculating three-dimensional temperature fields, based on an already existing two-dimensional method which lacked precision. We accelerate the calculation by using extended thermal gap constraints, which depict the thermal behaviour of the non-meshed, gas-filled gaps inside the cask. We validate the results of our calculation tool by comparing them with those generated with Ansys. The results of the comparison temperatures differ between −0.8% and 3.7%. The speedup of z88ENSI for the specific validation setting is between 6.9 and 15.0.

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“…At the same time, thermal stresses due to different thermal expansion occur. Basically, the fuel elements within dual purpose casks are positioned in the basket, which represents the inner cask part (Droste et al, 2014). This part is surrounded by a cylindrical shell, which ensures subcriticality due to the use of neutron-absorbing materials (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…resins) and high mechanical strength. At the top, a dual lid system seals the cask, whereas a plate is usually welded to the cask at its bottom (Droste et al, 2014), (Ziegler and Allelein, 2013). A loaded cask is about six meters in length, has a diameter of about 2.5 to 3 meters and a weight of about 140 tons (Ziegler and Allelein, 2013).…”

Section: Introductionmentioning

confidence: 99%

Influence of Gas-Filled Gaps on the Thermal Behaviour of Dual Purpose Casks

Dinkel

Billenstein

Rieg

et al. 2019

Proc. Int. Conf. Eng. Des.

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Basically, the safe dissipation of heat is among others an important protection objective of dual purpose casks. Gas-filled gaps within such casks can play a major role for the thermal behavior as they act as thermal barriers due to the lower heat conductivity of gaseous fluids in comparison to metallic materials. However, additional heat transmission mechanisms, such as natural convection and radiation can also occur in a gaseous medium. This leads to both an expanded modelling and a prolonged computing time in numerical simulations. Within the scope of a research project in cooperation with Swiss Federal Nuclear Safety Inspectorate ENSI a simulation tool for the fast thermal evaluation of dual purpose casks is developed which combines analytical methods and FEA. The innovation is that the thermal effects of gas-filled gaps are considered by using analytical equations. Main focus lies on the implementation of heat radiation as a non-linear transfer mechanism. Therefore, an iterative calculation process is used and the effects of the iteration number is investigated. Furthermore, the influence of radiation in comparison to pure conduction is examined depending on the gap width.

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Consideration of aging mechanism influence on transport safety of dual purpose casks for spent nuclear fuel or HLW

Cited by 3 publications

References 6 publications

Advisory Material for the IAEA Regulations for the Safe Transport of Radioactive Material (2018 Edition)

Advisory Material for the IAEA Regulations for the Safe Transport of Radioactive Material (2018 Edition)

Accelerated Parameterized Computation of the Thermal Behaviour of Dual Purpose Casks

Influence of Gas-Filled Gaps on the Thermal Behaviour of Dual Purpose Casks

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