Review of the Technical Basis of the Hydrogen Control Limit for Operations in Hanford Tank Farms

Thumbnail image of item number 1 in: 'Review of the Technical Basis of the Hydrogen Control Limit for Operations in Hanford Tank Farms'.
Thumbnail image of item number 2 in: 'Review of the Technical Basis of the Hydrogen Control Limit for Operations in Hanford Tank Farms'.
Thumbnail image of item number 3 in: 'Review of the Technical Basis of the Hydrogen Control Limit for Operations in Hanford Tank Farms'.
Thumbnail image of item number 4 in: 'Review of the Technical Basis of the Hydrogen Control Limit for Operations in Hanford Tank Farms'.
Showing 1-4 of 45 pages in this report.

PDF Version Also Available for Download.

Description

The waste in Hanford tanks generates a mixture of flammable gases and releases it into the tank headspace. The potential hazard resulting from flammable gas generation requires that controls be established to prevent ignition and halt operations if gas concentrations reach levels of concern. In cases where only hydrogen is monitored, a control limit of 6,250 ppm hydrogen has been in use at Hanford for several years. The hydrogen-based control limit is intended to conservatively represent 25% of the lower flammability limit of a gas mixture, accounting for the presence of flammable gases other than hydrogen, with ammonia being the … continued below

Physical Description

vp.

Creation Information

Mahoney, Lenna A. & Stewart, Charles W. November 30, 2002.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by the UNT Libraries Government Documents Department to the UNT Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 17 times. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Authors

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

About | Browse this Partner

Contact Us

Corrections Questions

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

The waste in Hanford tanks generates a mixture of flammable gases and releases it into the tank headspace. The potential hazard resulting from flammable gas generation requires that controls be established to prevent ignition and halt operations if gas concentrations reach levels of concern. In cases where only hydrogen is monitored, a control limit of 6,250 ppm hydrogen has been in use at Hanford for several years. The hydrogen-based control limit is intended to conservatively represent 25% of the lower flammability limit of a gas mixture, accounting for the presence of flammable gases other than hydrogen, with ammonia being the primary concern. This report reviews the technical basis of the current control limit based on observed and projected concentrations of hydrogen and ammonia representing a range of gas release scenarios. The conclusion supports the continued use of the current 6,250 ppm hydrogen control limit

Physical Description

vp.

Source

  • Other Information: PBD: 30 Nov 2002

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

About | Browse this Collection

What responsibilities do I have when using this report?

Digital Files

When

Dates and time periods associated with this report.

Creation Date

  • November 30, 2002

Added to The UNT Digital Library

  • Jan. 12, 2019, 4:41 p.m.

Description Last Updated

  • Feb. 4, 2019, 4:56 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 17
More Statistics

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

Thumbnail image of item number 1 in: 'Review of the Technical Basis of the Hydrogen Control Limit for Operations in Hanford Tank Farms'.
Thumbnail image of item number 2 in: 'Review of the Technical Basis of the Hydrogen Control Limit for Operations in Hanford Tank Farms'.
Thumbnail image of item number 3 in: 'Review of the Technical Basis of the Hydrogen Control Limit for Operations in Hanford Tank Farms'.
Thumbnail image of item number 4 in: 'Review of the Technical Basis of the Hydrogen Control Limit for Operations in Hanford Tank Farms'.

PDF Version Also Available for Download.

Citations, Rights, Re-Use

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Links for Robots

Helpful links in machine-readable formats.

Archival Resource Key (ARK)

International Image Interoperability Framework (IIIF)

Metadata Formats

Images

URLs

Stats

Mahoney, Lenna A. & Stewart, Charles W. Review of the Technical Basis of the Hydrogen Control Limit for Operations in Hanford Tank Farms, report, November 30, 2002; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1396882/: accessed July 17, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

Back to Top of Screen