Advanced searches left 3/3

Hazard - OSTI GOV

Summarized by Plex Scholar
Last Updated: 05 August 2022

* If you want to update the article please login/register

Idaho National Laboratory CY 2021 National Emission Standards for Hazardous Air Pollutants Analysis, Methodology and Results for Radionuclides

During calendar year 2021, radionuclides were found to be in use and potentially discharged from INL facilities around the Idaho National Laboratory Site boundary, and INL in-town facilities, according to this study. INL Report on Radionuclides, u201d The information in this paper supports the u201cNational Emission Standards for Hazardous Air Pollutants. The estimated annual potential dose at the INL Site MEI location in CY 2021 was 6. 67E-02 mrem/yr, up marginally from the previous year but less than the minimum requirement of 10 mrem/yr. Approximately 97% of the total dose to the INL Site MEI came from MFC sources. The INL in-town facility's annual potential dose of 6. 21E-03 mrem/yr to the MEI was down 40% from the CY 2020 average dose.

Source link: https://www.osti.gov/biblio/1876903


REMOVABLE, SEQUESTRATION COATINGS FOR MITIGATING HAZARDOUS CONTAMINANTS RELATED TO DEACTIVATION AND DECOMMISSIONING ACTIVITIES

InnoSense LLC and Oak Ridge National Laboratory collaborated on this project, with InnoSense LLC and InnoSense LLC aimed at minimizing the mercury contamination issue at the Y-12 National Security Complex, which is undergraduate research. ISL has produced a water-based reactive strippable coating to sequester elemental Hg and mercuric Hg species in the coating. The team successfully demonstrated the Trap & See-Hg technology to accurately determine the presence of Hg on concrete, soil, and drywall surfaces, resulting in the absence of Hg from lab-generated and ex-situ soil and syetu soil and fibrous coatings, sequester Hg from walls in the alpha-2 building basement at Y-12 during a small scale in-situ field trial. The ORNL team began identifying three to four potential locations for demonstrations in Y-12 and ORNL. Hg paints in the peeled paints range from 12 b5g Hg of paint to 1. 2 mg Hg/g of paint in the metal substrates, while soil samples could have a total Hg from 2. 3 mg Hg to 66 mg/g paint, according to a characterization of total Hg.

Source link: https://www.osti.gov/biblio/1878703


Limitations of traditional tools for beyond design basis external hazard PRA

Probabilistic risk assessment is increasingly used by the nuclear industry for safety during normal operations as well as for protection against external risks. The computation of the total risk in an external hazard PRA is based on hazard identification, fragility assessment, and system analysis. The event and fault trees for a real power plant can be quite large, posing computational challenges. The traditional PRA methods based on these assumptions are also widely used to perform risk analysis in the context of other than design basis scenarios. BDB risk assessment is also shown by case studies with CCF events across several fault trees to show the consequences of these assumptions when the more traditional approach is used in BDB risk analysis. The assumptions are valid for the case of DB conditions, according to the authors, but they can lead to excessively optimistic risk estimates in the case of BDB conditions.

Source link: https://www.osti.gov/biblio/1848325


Enhancement of risk informed validation framework for external hazard scenario

In recent years, the United States Nuclear Regulatory Commission and the International Atomic Energy Agency have developed tools to determine nuclear plants' vulnerabilities against site specific extreme risks. Based on a formal verification, validation, and uncertainty quantification procedure, the credibility of advanced simulation tools is determined. The lack of valid experimental results at system-level is one of the main reasons for validation. To formalize the confidence in advanced simulation results' predictive capabilities, a robust validation framework is required. In addition, this report expands the existing risk informed validation procedure, first introduced by Kwag et al. Both the system-level simulation and experimental models are tested for completeness and consistency by comparing the critical path for both the system-level simulation and experimental models. The applicability of the code for an intended application is shown in terms of various maturity levels and aids in the decision making process.

Source link: https://www.osti.gov/biblio/1850493


Work Plan for the Site-wide SSHAC Level 3 Probabilistic Seismic Hazard Analysis at INL

The probabilistic seismic hazard analysis will replicate the methods and procedures appropriate for the Senior Seismic Hazard Analysis Committee Level 3 report, which is included in NUREG-2213, the United States Nuclear Regulatory Commission's guidance. As an INL site-wide initiative, the SSHAC Level 3 probabilistic seismic hazard analysis is being conducted. The design nuclear facilities under the U. S. Department of Energy and the United States Nuclear Regulatory Commission's 2008/2009 Addendum to the work plan also includes quality assurance standards commensurate with the American Society of Mechanical Engineers. The Participatory Peer Review Panel will oversee the SSHAC Level 3 report from start to finish, including the initial and final INL Site-wide PSHA reports, so they can send a closing letter certifying the study's compliance with SSHAC procedures and technological adequacy of the final products.

Source link: https://www.osti.gov/biblio/1678686


High-pressure equipment: Hazards, operation, and safety, with emphasis on the haskel air intensifier pressure system

High pressure "high pressure" can take various meanings, and today, high-pressure techniques are used in a variety of industries. The term 'high pressure' can have many connotations, and today, high-pressure technology is used in a variety of industries. Pressure systems can be risky because electricity is stored, but pressure systems can be risky. Although the pressure vessel is the single source of potential energy within a process chain, and its failure may be extremely catastropic, failures in system components such as piping, valves, compressors, and pumps could result in similarly catastrophic failures.

Source link: https://www.osti.gov/biblio/5305026


Seismic hazard characterization of the eastern United States: Comparative evaluation of the LLNL and EPRI studies

The Lawrence Livermore National Laboratory LLNL developed a method to map seismic risk for all areas of the eastern United States east of the Rocky Mountains in 1982. This research was designed to aid in investigating the reasons for differences in results between the LLNL and the EPRI study, according to the EPRI study's goals. The value of m/sub o/, the ground motion simulations, and the fact that LLNL planned a local site update, where EPRI did not.

Source link: https://www.osti.gov/biblio/6519711

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions