Investigations of Dual-Purpose Canister Direct Disposal Feasibility (FY14)

Hardin, Ernest; Bryan, Charles R.; Ilgen, Anastasia Gennadyevna; Kalinina, Elena Arkadievna; Banerjee, Kaushik; Clarity, Justin B.; Howard, Robert; Jubin, Robert Thomas; Scaglione, John M; Perry, Frank V.; Zheng, Liange; Rutqvist, Jonny; Birkhölzer, Jens; Greenberg, H R; Carter, Joe; Severynse, Thomas F.

doi:10.2172/1594714

Cited by 14 publications

(25 citation statements)

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“…To address the apparent importance of saline groundwaters to postclosure criticality control, a survey of groundwater composition in different types of potential host media was undertaken by Frank Perry of Los Alamos National Laboratory (Hardin et al 2014a). The following discussion focuses first on crystalline and clay/shale media, then on saliniferous formations such as the evaporite sequence at the WIPP.…”

Section: Occurrence Of Saline Groundwatersmentioning

confidence: 99%

Summary of Investigations on Technical Feasibility of Direct Disposal of Dual-Purpose Canisters

Hardin

Price

Kalinina

et al. 2015

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Revision History Revision Description FCRD-UFD-2015-000129 Rev. 0 Sandia programmatic review (for DOE/NE-53 policy review and possible international peer review; SNL tracking number 275569) FCRD-UFD-2015-000129 Rev. 1 Sandia formal review (SAND2015-8712 R) for unclassified, unlimited release. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. CONTEXT FOR THIS STUDY This is a technical presentation that does not take into account the contractual limitations under the Standard Contract. Under the provisions of the Standard Contract, DOE does not consider spent fuel in canisters to be an acceptable waste form, absent a mutually agreed to contract modification. DISCLAIMER This information was prepared as an account of work sponsored by an agency of the U.S. Government. Neither the U.S.

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Section: Occurrence Of Saline Groundwatersmentioning

confidence: 99%

Summary of Investigations on Technical Feasibility of Direct Disposal of Dual-Purpose Canisters

Hardin

Price

Kalinina

et al. 2015

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“…Postclosure Criticality in a Salt Repository -Certain neutronic calculations performed evaluating the feasibility of direct disposal of dual-purpose canisters (DPCs) (most of which have readily degraded, aluminum based, absorbers), are applicable to STAD canisters. In particular, a high-reactivity model was formulated to study the effect of flooding ground waters of different composition (Hardin et al 2014). The model and results for sodium chloride brine over a range of chloride concentrations are shown in Fig.…”

Section: Page Intentionallymentioning

confidence: 99%

Rationale for the Performance Specification for Standardized Transportation, Aging, and Disposal Canister Systems (Rev.1)

Alsaed¹,

Blink²,

Nutt

et al. 2015

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This document provides the rationale for the specifications for the standardized transportation, aging, and disposal (STAD) canister systems provided in Performance Specification for Standardized Transportation, Aging, and Disposal Canister Systems, FCRD-NFST-2014-000579, Rev. 2, referred to as STAD Spec herein. The STAD Spec was developed to support STAD canister system studies and potential research, development, and demonstration activities. Requirements in the specification may evolve with time based on results from analyses, experiments, design studies, system evaluations and demonstrations, as well as other factors. The STAD canister system consists of a canister, together with a storage or aging overpack/module/vault, a shielded transfer cask (STC), a site transporter, a transportation overpack, and a transportation skid. Three sizes of circular cross section STAD canister variants are specified. The small STAD canister capacity is four pressurized water reactor (PWR) or nine boiling water reactor (BWR) spent nuclear fuel (SNF) assemblies. The medium STAD canister capacity is 12 PWR or 32 BWR SNF assemblies. The large STAD canister capacity is 21 PWR or 44 BWR SNF assemblies. There are 60 specifications in the STAD Spec that cover the STAD canister general design attributes, canister safety functional requirements, operational considerations, materials, storage and aging system requirements, and transportation system requirements. The 60 specifications are derived from regulatory requirements, regulatory guidance, STAD canister disposability considerations, and interim storage facility (ISF) and geologic repository handling facility considerations. The specifications and their respective rationales are guided by the following two questions: • If a specification were included, would it influence the design and analyses to meet a desired objective? • If a specification were omitted, could its omission influence the design and analyses in a way that would compromise a desired objective?

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“…Depending upon the types of fuel assemblies contained, the loss of neutron absorber from even a single cell could result in criticality. Aluminum-based neutron absorbers may not be appropriate for use in disposal systems, unless a strategy can be identified that does not rely on these absorbers, for how the canisters will remain subcritical when flooded (Hardin et al 2014). Alternatively, such a strategy could be based on evaluations that breach of the disposal overpack and subsequent flooding are sufficiently unlikely (Hardin 2013).…”

Section: Neutron Absorber Materialsmentioning

confidence: 99%

“…However, repository conditions in a clay or granite repository could be considerably different than those tested. For a salt repository, analyses have shown that flooding with chloride brine would likely provide enough natural chlorine to ensure subcriticality (Hardin et al 2014). Date…”

Section: Neutron Absorber Materialsmentioning

confidence: 99%