SPECIAL ANALYSIS: PRODUCTION TPBAR WASTE CONTAINER DISPOSAL WITHIN THE INTERMEDIATE LEVEL VAULT

Extended periods of interim storage are more relevant in Germany due to delays in the siting procedure to establish a deep geological repository for spent nuclear fuel, high level radioactive waste and in low/intermediate level waste container storage designated for the Konrad repository. BAM is involved in national cask licensing procedures and responsible for the evaluation of cask-related long-term safety issues. The long-term performance of elastomer seals for lid systems of transport and storage casks, whether used as auxiliary seals in spent fuel casks or as primary seals for low and intermediate level waste packages, is an important issue in this context. The polymeric structure of these seals causes a complex mechanical behavior with time-dependent sealing force reduction. The results of a comprehensive purpose-designed test program consisting of basic compression and tension tests as well as relaxation tests on unaged specimens of representative types of elastomers (fluorocarbon rubber (FKM) and ethylene propylene diene rubber (EPDM)) at different temperatures and strain rates are presented. They were used to identify the constitutive behavior and to obtain parameters for finite element material models provided by the computer code ABAQUS®. After estimating the influence of parameters such as Poisson’s ratio and friction coefficient by sensitivity analyses, the chosen values for the finite element simulation were validated by comparison with specimen test results. Based on this preliminary work the simulation of a specific laboratory test configuration containing a typical elastomer seal with circular cross section is presented. The chosen finite element material model and the related parameters had to show that they are able to represent not only the specimen behavior under predominantly uniaxial load but also the more complex stress states in real components. Deviations between the measured and calculated results are pointed out and discussed. The results from this work will be utilized in future simulations of aged elastomer behavior.

Disposability of the UK's Intermediate Level Wastes

MRS Proceedings ◽

10.1557/proc-1107-35 ◽

2008 ◽

Vol 1107 ◽

Cited By ~ 1

Author(s):

Paul K. Abraitis ◽

Glyn Davies

Keyword(s):

Chemical Properties ◽

Intermediate Level ◽

System A ◽

Waste Container ◽

Heterogeneous Nature ◽

Engineered Barriers ◽

Physical And Chemical ◽

Reactive Properties ◽

And Chemical Properties

AbstractThe UK's intermediate level waste (ILW) comprises a range of waste types, which vary widely in terms of physical and chemical properties, radionuclide content (including fissile) and half-life. ILW needs to be conditioned in such a way as to provide confidence that a future disposal facility for such wastes will be able to meet or exceed the basic long-term safety and environmental protection standards. The reactive properties and heterogeneous nature of certain ILW can present waste immobilisation challenges and, depending on the waste conditioning process that is adopted, may ultimately preclude the production of truly passive wasteforms. Of considerable interest is the extent of long-term containment likely to be afforded by the waste container, the wasteform and any engineered barriers within the disposal system. A regulatory view of the current uncertainties is provided and areas where further understanding would be beneficial are identified.

SPECIAL ANALYSIS: REVISION OF INTERMEDIATE LEVEL VAULT DISPOSAL LIMITS

10.2172/833396 ◽

2004 ◽

Author(s):

GREGORY FLACH

Keyword(s):

Intermediate Level ◽

Special Analysis

Facilitation and Inhibition From Intermediate-Level Semantic Role Features During Online Comprehension

PsycEXTRA Dataset ◽

10.1037/e527312012-277 ◽

2008 ◽

Author(s):

Gail Mauner ◽

Jeanpierre Koenig

Keyword(s):

Intermediate Level ◽

Semantic Role

Development of an ergonomic waste container for hospitals

PsycEXTRA Dataset ◽

10.1037/e578222012-006 ◽

2008 ◽

Author(s):

Rosa Padilla ◽

Jennifer Baltich ◽

Fadi Fathallah

Keyword(s):

Waste Container

119. A Grassroots Ergonomics Approach to Waste Container Handling

10.3320/1.2762949 ◽

1999 ◽

Author(s):

D. Zalk ◽

T. Biggs ◽

C. Perry ◽

P. Tittiranonda ◽

S. Burastero ◽

...

Keyword(s):

Waste Container ◽

Container Handling