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Title: Isolation System for NLOS Cannon Laser Firing System.

Abstract

Abstract not provided.

Authors:
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1267174
Report Number(s):
SAND2007-2486C
523137
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the Tri Labs Conference held May 7-10, 2007 in Albuquerque, NM.
Country of Publication:
United States
Language:
English

Citation Formats

Korellis, John S. Isolation System for NLOS Cannon Laser Firing System.. United States: N. p., 2007. Web.
Korellis, John S. Isolation System for NLOS Cannon Laser Firing System.. United States.
Korellis, John S. Sun . "Isolation System for NLOS Cannon Laser Firing System.". United States. doi:. https://www.osti.gov/servlets/purl/1267174.
@article{osti_1267174,
title = {Isolation System for NLOS Cannon Laser Firing System.},
author = {Korellis, John S.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}

Conference:
Other availability
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  • The design, assembly and characterization of the latest generation of a small, ruggedized laser-optical firing system will be discussed. This work builds upon earlier results in an effort to continue the development of robust fiber-coupled laseroptical firing systems.[1][2] This newest prototype strives to improve on earlier designs, while continuing to utilize many of the environmentally proven opto-mechanical sub-assemblies.[2][3] One area of improvement involves the implementation of a second optical safing and arming component. Several additional design improvements were also incorporated to address shortcomings uncovered during environmental testing.[4][5] These tests and the subsequent failure analysis were performed at the laser sub-systemmore » level. Four identical prototypes were assembled and characterized. The performance of the units were evaluated by comparing a number of parameters including laser output energy, slope efficiency, beam divergence, spatial intensity profile, fiber injection and splitter-coupler transmission efficiency. Other factors evaluated were the ease of alignment, repeatability of the alignment process and the fabrication of the fiberoptical cables. The experimentally obtained results will be compared and contrasted to the performance of earlier prototypes.« less
  • For the past decade, Cannon Boiler Works, Inc. has been developing a new low temperature process (LTO) for removing both nitrogen and sulfur oxides from exhaust gas streams. In this process, ozone is mixed with the exhaust gas and the NO and NO{sub 2} gas components are oxidized to higher oxides nitrogen in a plug-flow reactor. The exhaust gas stream is then fed to an absorber chamber where the nitrogen oxides are absorbed into an aqueous solution as soluble nitrates and the sulfur oxides as insoluble sulfites and sulfates. In order to answer questions about the suitability of the Cannonmore » LTO System for applications in the field of coal-fired Utility boilers, it was proposed to Duquesne Light Company that a slip stream test be carried out using gases from the main exhaust duct leaving the ESPs. The most serious questions to be answered were whether the system could operate at the normal exhaust gas temperatures of utility boilers, whether the fly ash and S02 gases would interfere, and whether the stations normal scrubber lime slurry could be used as the absorbent for both the nitrogen and sulfur oxides leaving the LTO System`s reactor. The slip stream test was performed at the Elrama Station with the financial support of Duquesne Light Company and members of PERC. Preliminary results of the slip stream tests have shown that: (1) The Cannon LTO System performs well with coal-fired exhaust gases -- as it did with those from natural gas-fired burners, (2) 100% NO{sub x} removal was achieved and (3) the absorption of the higher oxides of nitrogen was almost unaffected by the pH of the aqueous absorbent.« less
  • The Cannon system for removing NO{sub x}, originally designated as the Cannon NO{sub x} Digester, has recently been renamed the Low Temperature Oxidation (LTO) System for NO{sub x} and SO{sub x} Reduction. The influences of the presence of carbonaceous particulates, sulfur oxides and high levels of carbon monoxide had not been assessed in actual tests. The principal objectives of the slip stream test at the Elrama Power Station were: (1) to show that the Cannon LTO System, presently under developed for natural gas-fired equipment, is capable of removing all NO{sub x} pollutants from the exhaust gas stream of a coal-firedmore » utility boiler; (2) to provide the physical data needed for extending Cannon`s process simulation models to cover the processing of coal-fired equipment`s exhaust streams, this will permit the accurate design of scaled-up systems which can lead to a full scale demonstration of a Cannon LTO System installed in a coal-fired utility plant; (3) to provide the physical data needed for accurately predicting the economics for the Cannon LTO System as applied to a coal-fired utility plant, economic analyses which will provide realistic estimates of both capital and operating costs are critically necessary in making decisions about extensions of this proposed program to large-scale systems; (4) to provide estimates of the oxidation rates for NO{sub x} and CO with ozone at the temperatures found in the 501 Scrubber duct.« less
  • The composition and properties of ash formed during coal firing have a major impact on boiler performance. Higher ash content in the coal can mean higher costs associated with coal handling, transportation, ash removal and ash disposal along with higher costs due to the increased ash content`s deleterious effects on pulverizing, combustion and heat transfer. ABB C-E Services, Inc. has conducted research for many years on what might be done to minimize the adverse effects of ash on boiler performance. Recently, ABB C-E Services has studied the effects of firing system modifications on ash composition and properties and the effectmore » these firing system modifications have on overall furnace performance. The subject of this paper is the impact of the installation of the CFS Concentric Firing System on the propensity for boiler wall ash deposition. For this study, CFS yaw angles were varied and particle samples were collected at the waterwalls for the different yaw angles tested. These ash samples were analyzed for ash composition. The results showed that with a larger CFS yaw angle (the air stream directed more towards the boiler walls) the base/acid ratio, iron content and sulfur content of the particle samples collected at the waterwall were reduced. This effect is due to several contributing factors: (1) an oxidizing environment produced by injecting more air toward the walls; and (2) an aerodynamic change which impacts the particle combustion time/temperature history.« less
  • The composition and properties of ash formed during coal firing have a major impact on boiler performance. Higher ash content in the coal can mean higher costs associated with coal handling, transportation, ash removal and ash disposal along with higher costs due to the increased ash content's deleterious effects on pulverizing, combustion and heat transfer. ABB C-E Services, Inc. has conducted research what might be done to minimize the adverse effects of ash on boiler performance for many years. Recently, ABB C-E Services has studied the effects of firing system modifications on ash composition and properties and the effect thesemore » firing system modifications have on overall furnace performance. The subject of this paper is the impact of the installation of the CFS{trademark} yaw angles were varied and particle samples were collected at the waterwalls for the different yaw angles tested. These ash samples were analyzed for ash composition. The results showed that with a larger CFS{trademark} yaw angle (the air stream directed more towards the boiler walls) the base/acid ratio, iron content and sulfur content of the particle samples collected at the waterwall were reduced. This effect is due to several contributing factors: (1) an oxidizing environment produced by injecting more air toward the walls; and (2) an aerodynamic change which impacts the particle combustion time/temperature history.« less