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US/EURATOM I-NERI 2019 Annual Review Assessing

Sorrenson, Ken; Teague, Melissa C.; Saltzstein, Sylvia J.; Papaioannou, Dimitri; Hanson, Brady; Caruso, Stefano; Linnemann, Konrad

This project addresses the important issue of validating the integrity of spent nuclear fuel storage for extended periods of time, followed by transportation. While it is believed that this fuel is safe in its current condition for long periods of time, confirmatory data and analyses need to be obtained to validate our understanding of used fuel degradation mechanisms that may impinge on the integrity of the fuel to withstand long term storage and transportation conditions. This is especially true for high burnup fuel (> 45 GWD/MTU) that is currently being discharged. The international community recognizes the importance of these issues. Moreover, several European countries now envisage to subject mixed oxide (MOX) fuel to extended storage and direct disposal. The institutes collaborating on this proposal all have active programs focused on resolving these very issues. Collaborating together provides a leverage of programs and funding that will benefit each program individually as well as the commercial nuclear industry, as a whole.

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TYPE Other Report YEAR 2019
DOIOSTI

Visualization of the High-Burnup Spent Fuel Rod Phase 1 Test Plan: Technical Memo - Spent Fuel and Waste Disposition (Technical Memo)

Saltzstein, Sylvia J.

Twenty-five high-burnup fuel rods were extracted from seven different fuel assemblies used for power production at the North Anna nuclear power plant and shipped to Oak Ridge National Laboratory (ORNL) in 2016 for detailed non-destructive examination (NDE) and destructive examination (DE). The spent fuel rods were from 17×17 lattices and consist of four cladding types—Zirlo®, M5®, Zircaloy-4, and low tin Zircaloy-4 (Zirc-4). These spent fuel rods are being tested to provide: (a) baseline characterization and mechanical property data that can be used as a comparison to fuel that was loaded into a modified TN-32B cask in November 2017, as part of the high-burnup confirmatory data project and (b) data applicable to high-burnup fuel rods (>45 GWd/MTU) currently stored and to be stored in the dry-cask fleet. The TN-32B cask is referred to as the “Demo” cask and is currently expected to be transported to a separate location and the internal contents inspected in approximately ten years. ORNL has completed the NDE of the twenty-five fuel rods. The purpose of this technical memorandum is to present a simplified summary of the first phase of destructive examinations and test conditions that will be used for communicating with various stakeholders. The destructive examinations will leverage the expertise and capabilities from multiple national laboratories for performing independent measurements of relevant data. Close coordination is required to ensure that all examinations follow well documented procedures and are performed so that measured data and characteristics can be readily compared. Pacific Northwest National Laboratory (PNNL) has published a detailed overview of the test program. ORNL and PNNL developed detailed draft test plans for testing to be performed at their facilities. ORNL and PNNL are in the process of refining these test plans to apply specifically to the testing described in this memorandum. Argonne National Laboratory (ANL) contributed to the ORNL test plan by describing tests to be conducted at ANL. Testing will be based on continuous learning. If a test produces results that are inconsistent with expectations or current trends, further testing will be paused until a path forward is established to understand the results and to identify follow-on testing.

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TYPE Presentation YEAR 2018
DOIOSTIDOIOSTI
Results 51–75 of 146
Results 51–75 of 146