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Nuclear Risk Assessment 2019 Update for the Mars 2020 Mission Environmental Impact Statement

Clayton, Daniel J.; Wilkes, John; Starr, Michael J.; Ehrhart, Brian D.; Mendoza, Hector M.; Ricks, Allen J.; Villa, Daniel V.; Potter, Donald L.; Dinzl, Derek J.; Fulton, John F.; Laros, James H.; Cochran, Lainy D.; Brooks, Dusty M.

In the summer of 2020, the National Aeronautics and Space Administration (NASA) plans to launch a spacecraft as part of the Mars 2020 mission. The rover on the proposed spacecraft will use a Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) to provide continuous electrical and thermal power for the mission. The MMRTG uses radioactive plutonium dioxide. NASA is preparing a Supplemental Environmental Impact Statement (SEIS) for the mission in accordance with the National Environmental Policy Act. This Nuclear Risk Assessment addresses the responses of the MMRTG option to potential accident and abort conditions during the launch opportunity for the Mars 2020 mission and the associated consequences. This information provides the technical basis for the radiological risks discussed in the SEIS.

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TYPE SAND Report YEAR 2019
DOIOSTI

HyRAM V2.0 User Guide

Feliciano, Guillermo F.; Ehrhart, Brian D.; Muna, Alice B.

Hydrogen Risk Assessment Models (HyRAM) is a software toolkit that provides a basis for quantitative risk assessment and consequence modeling for hydrogen infrastructure and transportation systems. HyRAM integrates validated, analytical models of hydrogen behavior, statistics, and a standardized QRA approach to generate useful, repeatable data for the safety analysis of various hydrogen systems. HyRAM is a software developed by Sandia National Laboratories for the U.S. Department of Energy. This document demonstrates how to use HyRAM to recreate a hydrogen system and obtain relevant data regarding potential risk. Specific examples are utilized throughout this document, providing detailed tutorials of HyRAM features with respect to hydrogen system safety analysis and risk assessment.

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TYPE SAND Report YEAR 2019
DOIOSTI

Identification of Hydrogen Material Risk Research Areas

Ehrhart, Brian D.; Muna, Alice B.

This report presents a research framework for the application of quantitative risk assessment to hydrogen materials, based on the identification of potential areas of research, a literature review, and a plan for future work in the area of hydrogen materials risk. After outlining basics on hydrogen infrastructure, with a focus on pressure vessels, a number of materials risk topics are identified and discussed. Of these, four important areas of risk application to hydrogen materials are highlighted and discussed in further detail. The four topics are initial crack distribution in metals, damage and stress rupture in composites, and polymer behavior in high pressure hydrogen. These topics vary in scope, specificity, level of anticipated resources required, and potential impact to the field. Finally, recommendations are made for future research on the highest priority topics.

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TYPE SAND Report YEAR 2019
DOIOSTI
Results 76–100 of 133
Results 76–100 of 133