R-Matrix Evaluation of Cl Neutron Cross Sections up to 1.2 MeV

Sayer, R.O.

doi:10.2172/814066

Cited by 6 publications

(5 citation statements)

References 17 publications

(57 reference statements)

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“…The nuclear data library considered in this study is the ENDF/B-VII.1 (Chadwick et al 2011). The resolved resonance region evaluation for both isotopes of chlorine, which also governs the thermal energy region, was completed in 2003 by Oak Ridge National Laboratory (Sayer et al 2003). The evaluation was subsequently updated in 2007.…”

Section: Summary Of Investigations On Technical Feasibility Of Direct...mentioning

confidence: 99%

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

Liljenfeldt

Banerjee

Clarity

et al. 2017

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This report is a revision of the Fiscal Year (FY)-15 summary report on the investigations on technical feasibility of direct disposal of dual-purpose canisters (DPCs) in a geological repository. Notable progress has been made in the postclosure criticality area supporting direct disposal of DPCs in As such, this revision updates the postclosure criticality related studies to capture the advances made over the last two FYs.This study has evaluated the technical feasibility of direct disposal in a geologic repository, of commercial spent nuclear fuel (SNF) in dual-purpose canisters (DPCs) of existing designs. The authors, representing several national laboratories, considered waste isolation safety, engineering feasibility, thermal management, and postclosure criticality control. The 5-year study concludes that direct disposal is technically feasible for most DPCs, depending on the repository host geology. Postclosure criticality control, and thermal management strategies that allow permanent disposal within 150 years, are two of the most challenging aspects. This document summarizes technical results from a series of previous reports, and describes additional studies that can be done especially if site-specific information becomes available from one or more prospective repository sites.Generic (non-site specific) performance assessments have been conducted for generalized disposal concepts in different host media as part of the used fuel disposal and Spent Fuel and Waste Science and Technology research and development (R&D) programs. These show how regulatory performance objectives on individual protection and groundwater protection could be met; however, they are not detailed enough to discern differences in performance between DPC direct disposal and disposal of the same SNF in purpose-designed packaging. Such differences could arise because of the quantity of waste in each package, the duration of elevated temperature, and/or the internal design of the canisters. More detailed simulation of postclosure waste isolation is an important area that can be advanced when sitespecific information becomes available. Another area is the R&D needed to incorporate cementitious materials into repository design, which could be beneficial for any disposal concept but more important for disposal of DPC-based packages because of their size and weight. Postclosure criticality control is essentially also a safety question but is addressed below in a separate discussion.Handling and packaging of DPCs are within the state-of-the-practice in the U.S. nuclear industry, so engineering feasibility and preclosure safety can be assured. The means of transporting DPC-based waste packages underground and emplacing them in disposal tunnels are more developmental, but the equipment would be similar to existing designs for shielded DPC handling equipment. Designs and relevant experience exist for shafts, ramps, and funicular options to transport waste packages underground. In most cases, such systems would be largest of their kinds and could...

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Section: Summary Of Investigations On Technical Feasibility Of Direct...mentioning

confidence: 99%

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

Liljenfeldt

Banerjee

Clarity

et al. 2017

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Section: Summary Of Investigations On Technical Feasibility Of Directmentioning

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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“…The thermal cross sections and their uncertainties calculated with the RPCM are shown in Table VIII Resonance evaluations for 35 Cl and 37 Cl were carried out in the energy region from thermal to 1.2 MeV [25]. The expansion of the ENDF format with the LRF=7 option allowed inclusion of charged particle exit channels in the evaluation for 35 Cl.…”

Section: Nickel 58 Ni and 60 Ni Evaluation And Covariancementioning

confidence: 99%

“…A detailed discussion of the analysis methods used to determine parameter values and uncertainties are given in Ref. [25]. For capture and neutron width uncertainties, for example, for each resonance several SAMMY calculations with different width values were overlaid with the data.…”

Section: Nickel 58 Ni and 60 Ni Evaluation And Covariancementioning

confidence: 99%