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Applying Human Factors during the SIS Life Cycle
Safety Instrumented Systems (SIS) are widely used in U.S. Department of Energy's (DOE) nonreactor nuclear facilities for safety-critical applications. Although use of the SIS technology and computer-based digital controls, can improve performance and safety, it potentially introduces additional complexities, such as failure modes that are not readily detectable. Either automated actions or manual (operator) actions may be required to complete the safety instrumented function to place the process in a safe state or mitigate a hazard in response to an alarm or indication. DOE will issue a new standard, Application of Safety Instrumented Systems Used at DOE Nonreactor Nuclear Facilities, to provide guidance for the design, procurement, installation, testing, maintenance, operation, and quality assurance of SIS used in safety significant functions at DOE nonreactor nuclear facilities. The DOE standard focuses on utilizing the process industry consensus standard, American National Standards Institute/ International Society of Automation (ANSI/ISA) 84.00.01, Functional Safety: Safety Instrumented Systems for the Process Industry Sector, to support reliable SIS design throughout the DOE complex. SIS design must take into account human-machine interfaces and their limitations and follow good human factors engineering (HFE) practices. HFE encompasses many diverse areas (e.g., information display, user-system interaction, alarm management, operator response, control …
Date:
May 5, 2010
Creator:
Avery, K.
Object Type:
Article
System:
The UNT Digital Library
Aquifer Testing and Rebound Study in Support of the 100-H Deep Chromium Investigation
The 100-HR-3 Groundwater Operable Unit (OU) second Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) 5-year review (DOEIRL-2006-20, The Second CERCLA Five-Year Review Report for the Hanford Site) set a milestone to conduct an investigation of deep hexavalent chromium contamination in the sediments of the Ringold upper mud (RUM) unit, which underlies the unconfined aquifer in the 100-H Area. The 5-year review noted that groundwater samples from one deep well extending below the aquitard (i.e., RUM) exceeded both the groundwater standard of 48 parts per billion (ppb) (Ecology Publication 94-06, Model Toxics Control Act Cleanup Statute and Regulation) and the federal drinking water standard of 100 {mu}g/L for hexavalent chromium. The extent of hexavalent chromium contamination in this zone is not well understood. Action 12-1 from the 5-year review is to perform additional characterization of the aquifer below the initial aquitard. Field characterization and aquifer testing were performed in the Hanford Site's 100-H Area to address this milestone. The aquifer tests were conducted to gather data to answer several fundamental questions regarding the presence of the hexavalent chromium in the deep sediments of the RUM and to determine the extent and magnitude of deeper contamination. The pumping tests …
Date:
November 5, 2010
Creator:
Smoot, J. L.
Object Type:
Report
System:
The UNT Digital Library
Archer County News (Archer City, Tex.), No. 31, Ed. 1 Thursday, August 5, 2010
Weekly newspaper from Archer City, Texas that includes local, state, and national news along with advertising.
Date:
August 5, 2010
Creator:
Lewis, Shelley
Object Type:
Newspaper
System:
The Portal to Texas History
Attrition Resistant Fischer-Tropsch Catalysts Based on FCC Supports
Commercial spent fluid catalytic cracking (FCC) catalysts provided by Engelhard and Albemarle were used as supports for Fe-based catalysts with the goal of improving the attrition resistance of typical F-T catalysts. Catalysts with the Ruhrchemie composition (100 Fe/5 Cu/4.2 K/25 spent FCC on mass basis) were prepared by wet impregnation. XRD and XANES analysis showed the presence of Fe{sub 2}O{sub 3} in calcined catalysts. FeC{sub x} and Fe{sub 3}O{sub 4} were present in the activated catalysts. The metal composition of the catalysts was analyzed by ICP-MS. F-T activity of the catalysts activated in situ in CO at the same conditions as used prior to the attrition tests was measured using a fixed bed reactor at T = 573 K, P = 1.38 MPa and H{sub 2}:CO ratio of 0.67. Cu and K promoted Fe supported over Engelhard provided spent FCC catalyst shows relatively good attrition resistance (8.2 wt% fines lost), high CO conversion (81%) and C{sub 5}+ hydrocarbons selectivity (18.3%).
Date:
February 5, 2010
Creator:
Adeyiga, Adeyinka
Object Type:
Report
System:
The UNT Digital Library
[Audience and spotlight on curtain doorway]
Photograph of audience and spotlight on curtain doorway.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience looking on at performer speaking on stage]
Photograph of audience looking on at performer speaking on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience looking on at performer speaking on stage]
Photograph of audience looking on at performer speaking on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience looks on at performer speaking]
Photograph of audience looking on at performer speaking.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience members watch a performer on stage]
Photograph of audience members watching the performer speak.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Photograph of audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Photograph of audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Photograph of audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Photograph of audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Photograph of audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Photograph of audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Photograph of audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Photograph of audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Photograph of audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Photograph of audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library
[Audience watching performer on stage]
Audience watching performer on stage.
Date:
[2010-11-05..2010-11-06]
Creator:
Brown, Jirard
Object Type:
Photograph
System:
The UNT Digital Library