- Email: [email protected]
00418 Viscosity of base-treated asphaltene solutions
05
Nuclear fuels (scientific,technical)
Q5/00411 Structural grads concreta wlth high fly ash contents Patodiya, S. C. Proc. 1992 Nat ConjI Gem.Build. Mater. Ind. Wastes, Tara McGraw-Hill Publications, New Delhi, India, 111-116. It is commonly known that fly ash can be substituted for ordinary portland cement in concrete to the extent of 15% to 20%. But now it is established that such replacement can be even up to 50% in structural-grade concrete without adversely affecting any of its important properties. The properties and performance of concrete improves with the addition of fly ash in it. In hot climate countries like India, the fly ash concrete gives many advantages over no fly ash concrete. Q5/W412 Surface chrmlatry control for ?? elactlve foul1 rraln flotatlon Miller, J. D. et al., US Pat. US.5,318,185, Jun. 1994. A froth flotation process for separating fihe particles of fossil resin by using frothing reagents which include an aliphatic organic compound with a polar group and containing up to 4 carbon atoms. Butanol is an effective reagent in this method. Thrrmogravlmetrlc Invratlgatlon on some ItallanQ5/00413 made bltumena Santarelli, M. L. and Giavarini, C. La Rivista dei Combustibili, May 1994, 48, (S), 191-198. (In Italian) Thermogravimetric analysis (TGA) carried out on some straight run (SR) and visbreaking (VB) bitumens shows three different ranges of temperature where the oxidation of the bitumen components occurs. For comparison oumoses. other fractions were studied: thev were semuated from the same bit;mens previously analysed; industkal pioducts obtained by treatment of a bitument with propane were also analysed. The experimental work shows that TGA generally allows evaluation of the bitumen source (SR or VB) and the ageing rewstance; however, other analytical techniques should be used to support TGA results. Tranalsnt klnetlc ?? tudlea of the partial oxldatlon of Q5lQQ414 methane on V,OdSlO, Chen, S. Y. and Willcox, D. Ind. Eng. Chem. Res., Apr. 1994, 33, (4), 832-839. In this study, the authors attempt to determine the mechanism for the selective oxidation of methane directly to methanol and formaldehyde on vanadium oxide supported on silica and to examine the differences between the activities of nitrous oxide and molecular oxygen. Uae of fly ash from a cogeneratlon plant In Q5/00415 concrete Lin, S. H. and Lin, C. M. Environ. Technol., 1994, 15, (S), 477-483. The paper describes how fly ash from a coal-burning cogeneration plant was used to prepare concrete specimens by partially replacing cement. The compressive strength and chloride diffusion coefficient of those fly ash concrete specimens were measured. It was’found that for ~38 days of curing, the concrete with up to 30% cogeneration plant fly ash can have a compressive strength 10% lower than the conventional concrete. Q5100416 The uae of low rank coal-baaed adsorbent8 for the removal of nltrophanol from aqueous aolutlon Hobday, M. D. et al., Fuel, Dec. 1994, 73, (12), 1848-1854. A range of Victorian brown coal based materials (Yalloum brown coal, grus, briquette char, power station char and an activated carbon) have been assessed as potential adsorbents for the removal of organics from aqueous waste. The compound 4-nitrophenol has been used as the adsorbate. The influence of adsorbent dosage levels, particle size, and the presence of buffer solution components, other electrolytes, and pH on the kinetics of adsorption of nitrophenol has been investigated. Utlllzatlon of coal ash In the manufacture of bulldQ5loo417 Ing materlala Johnson, W. B. PCT. Int WO,94,10,099, May 1994. Q5100416 Vlacoalty of base-treated aaphaltena aolutlona Sheu, E. Y. er al., Fuel, Nov. 1994, 73, (ll), 1766-1771. The viscosity behaviour of base-treated Ratawi asphaltene-toluene solutions was compared with that of untreated solutions. NaOH solutions (1,3 and 6 M) were used to treat the asphaltene solutions by mechanical mixing followed by overnight two-phase equilibrium. The treatment noticeably affected the viscosity, particularly for asphaltene volume fractions (phi) ~0.12. The simple Pal-Rhodes analysis indicated that the systems became very non-ideal,.phi eO.1, robably owing to the charges introducted into the asphaltene colloids. A e Dougherty-Krieger formula failed to explain the data. The Mooney equation qualitatively characterized the particle polydispersity but not the interactions. The interaction was interpreted by a two-fltud model.
24
Fuel and Energy Abstracts January lQQ5
05 NUCLEAR FUELS Scientific, Technical Q5/00419 Artlflclal neural networka In nuclear power plants Uhrig, R. E. Nuclear News, Jul. 1994, 37, (9), 38-40. Discusses artificial neural networks which are computer processing systems that are often capable of doing things that humans do well, but that conventional computers often do poorly. Historically, utilities and other operators of nuclear power plants have relied on human management to monitor the plants and diagnose problems that occur. With the notable exceptions of Three Mile Island in the USA and Chernobyl, this approach appears to have worked reasonably well. Over the years, however, there has been evidence linking these accidents and a number of troublesome operational incidents, or near accidents, to ‘operator errors’. Q5/00420 ComEd OK’d to run unlta wlth core shroud cracka Nuclear News, Sep. 1994, 37, (ll), 24-25. Reports that the Nuclear Regulatory Commission in the USA has concluded that despite the circumferential cracks in their core shrouds. the reactors at Corn-monwealth Edison’s (ComEd) Dresden-3 and Quad Cities1 can safety operate for another 15 months before repairs are made. Q5JOQ421 Comment from Europe. Prlvatlzatlo+Panacea nuclear future Rippon, S. Nuclear News, Aug. 1994, 37, (lo), p. 41. The author discusses the energy policies in the United Kingdom.
for a
Contractors continua through commlaalonlng 95100422 Atom, Aug.-Sep. 1994, (435), p.31. Reports that many of the construction and supply contracts for Sizewell B go way beyond a delivery deadline, and some companies have been involved in the commissioning stages. Q5lOo423 Contractors were, and are, committed to Slaewell Atom, Aug.-Sep. 1994, (435), 28-29. Several hundred companies were contracted to Sizewell B. Many have invested in new plant and techniques specifically for the Sizewell project. For some, Sizewell was an incentive to invest in new capabilities. Between 1987 and 1994, Babcock Energy was instrumental in improving engineering, manufacturing, and inspection techniques, and now Sizewell B is probably the most advanced and highest quality nuclear power station in the world. Sizewell B is probably the first PWR where both the manufacturing and pre-service inspections of the reactor pressure vessel and incredibility of failure components, have been independently validated. The validation was performed at AEA Technology’ purpose-built Inspection -_ s _ _ Validation Cenire. 95100424 The course of true outage never ran ao smooth Harberts, C. Atom, Aug.-Sep. 1994, (435), 42-45. The author discusses how the outage performance has become a key issue at San Onofre when outages were identified as an area the station could improve in after they benchmarked themselves against other good performing nuclear plants. To improve the performance of outages the working structure of the entire organisation had to be radically changed. Effect of buoyancy on forced convection In a 95100425 cuaped duct Dong, 2. F. and Ebadian, M. A. Numerical Hear Transfer, Parr A, Applications. Jun. 1994. 25. (61. 743-755. In the event of a loss of coolant accident in a pressurized water reactor, swelling of the fuel rod cladding will lead to reduction of the subchannel flow area and worsening of the core heat transfer in the region of the blockage. The four-cusped duct is an ideal geometry for the simulation of such a channel blockage. Understanding the characteristics of flow and heat transfer in the cusped duct is essential for better design of the emergency core cooling system. Thus, in this paper, combined natural and forced convection in a vertical cusped duct has been investigated in the region of both hydrodynamically and thermally fully developed flow. Embedded Topical. 11th Topical Meeting on the 95100426 Technology of Fualon Energy Zeyher, A. Nuclear News, Aug. 1994, 37, (lo), 75-78. A report on the 11th Topical Meeting on the Technology of Fusion Energy held 20-23 June during the 1994 American Nuclear Society Annual Meeting in New Orleans. The lenary session on ‘New Develo ments in the U.S. Fusion Program’ pro s uced a very interesting talk by d tephen Dean, president of Fusion Power Associates, about applications of fusion technology outside the field of fusion reactors. The topices covered in ‘Near-Term Ap lication of Fusion Technologies’ included such subjects as plasma etcR.mg of semi-conductor integrated circuits. 95100427 Europe: The nuclear scene In the mld-19908. Weatem Europa Rippon, S. Nuclear News, Sep. 1994, 37, (ll), 52-54, 78, 80, 82-87. A review of the nuclear scene m Western Europe in the mid-1990s.
Nuclear fuels (scientific,technical)
Q5/00411 Structural grads concreta wlth high fly ash contents Patodiya, S. C. Proc. 1992 Nat ConjI Gem.Build. Mater. Ind. Wastes, Tara McGraw-Hill Publications, New Delhi, India, 111-116. It is commonly known that fly ash can be substituted for ordinary portland cement in concrete to the extent of 15% to 20%. But now it is established that such replacement can be even up to 50% in structural-grade concrete without adversely affecting any of its important properties. The properties and performance of concrete improves with the addition of fly ash in it. In hot climate countries like India, the fly ash concrete gives many advantages over no fly ash concrete. Q5/W412 Surface chrmlatry control for ?? elactlve foul1 rraln flotatlon Miller, J. D. et al., US Pat. US.5,318,185, Jun. 1994. A froth flotation process for separating fihe particles of fossil resin by using frothing reagents which include an aliphatic organic compound with a polar group and containing up to 4 carbon atoms. Butanol is an effective reagent in this method. Thrrmogravlmetrlc Invratlgatlon on some ItallanQ5/00413 made bltumena Santarelli, M. L. and Giavarini, C. La Rivista dei Combustibili, May 1994, 48, (S), 191-198. (In Italian) Thermogravimetric analysis (TGA) carried out on some straight run (SR) and visbreaking (VB) bitumens shows three different ranges of temperature where the oxidation of the bitumen components occurs. For comparison oumoses. other fractions were studied: thev were semuated from the same bit;mens previously analysed; industkal pioducts obtained by treatment of a bitument with propane were also analysed. The experimental work shows that TGA generally allows evaluation of the bitumen source (SR or VB) and the ageing rewstance; however, other analytical techniques should be used to support TGA results. Tranalsnt klnetlc ?? tudlea of the partial oxldatlon of Q5lQQ414 methane on V,OdSlO, Chen, S. Y. and Willcox, D. Ind. Eng. Chem. Res., Apr. 1994, 33, (4), 832-839. In this study, the authors attempt to determine the mechanism for the selective oxidation of methane directly to methanol and formaldehyde on vanadium oxide supported on silica and to examine the differences between the activities of nitrous oxide and molecular oxygen. Uae of fly ash from a cogeneratlon plant In Q5/00415 concrete Lin, S. H. and Lin, C. M. Environ. Technol., 1994, 15, (S), 477-483. The paper describes how fly ash from a coal-burning cogeneration plant was used to prepare concrete specimens by partially replacing cement. The compressive strength and chloride diffusion coefficient of those fly ash concrete specimens were measured. It was’found that for ~38 days of curing, the concrete with up to 30% cogeneration plant fly ash can have a compressive strength 10% lower than the conventional concrete. Q5100416 The uae of low rank coal-baaed adsorbent8 for the removal of nltrophanol from aqueous aolutlon Hobday, M. D. et al., Fuel, Dec. 1994, 73, (12), 1848-1854. A range of Victorian brown coal based materials (Yalloum brown coal, grus, briquette char, power station char and an activated carbon) have been assessed as potential adsorbents for the removal of organics from aqueous waste. The compound 4-nitrophenol has been used as the adsorbate. The influence of adsorbent dosage levels, particle size, and the presence of buffer solution components, other electrolytes, and pH on the kinetics of adsorption of nitrophenol has been investigated. Utlllzatlon of coal ash In the manufacture of bulldQ5loo417 Ing materlala Johnson, W. B. PCT. Int WO,94,10,099, May 1994. Q5100416 Vlacoalty of base-treated aaphaltena aolutlona Sheu, E. Y. er al., Fuel, Nov. 1994, 73, (ll), 1766-1771. The viscosity behaviour of base-treated Ratawi asphaltene-toluene solutions was compared with that of untreated solutions. NaOH solutions (1,3 and 6 M) were used to treat the asphaltene solutions by mechanical mixing followed by overnight two-phase equilibrium. The treatment noticeably affected the viscosity, particularly for asphaltene volume fractions (phi) ~0.12. The simple Pal-Rhodes analysis indicated that the systems became very non-ideal,.phi eO.1, robably owing to the charges introducted into the asphaltene colloids. A e Dougherty-Krieger formula failed to explain the data. The Mooney equation qualitatively characterized the particle polydispersity but not the interactions. The interaction was interpreted by a two-fltud model.
24
Fuel and Energy Abstracts January lQQ5
05 NUCLEAR FUELS Scientific, Technical Q5/00419 Artlflclal neural networka In nuclear power plants Uhrig, R. E. Nuclear News, Jul. 1994, 37, (9), 38-40. Discusses artificial neural networks which are computer processing systems that are often capable of doing things that humans do well, but that conventional computers often do poorly. Historically, utilities and other operators of nuclear power plants have relied on human management to monitor the plants and diagnose problems that occur. With the notable exceptions of Three Mile Island in the USA and Chernobyl, this approach appears to have worked reasonably well. Over the years, however, there has been evidence linking these accidents and a number of troublesome operational incidents, or near accidents, to ‘operator errors’. Q5/00420 ComEd OK’d to run unlta wlth core shroud cracka Nuclear News, Sep. 1994, 37, (ll), 24-25. Reports that the Nuclear Regulatory Commission in the USA has concluded that despite the circumferential cracks in their core shrouds. the reactors at Corn-monwealth Edison’s (ComEd) Dresden-3 and Quad Cities1 can safety operate for another 15 months before repairs are made. Q5JOQ421 Comment from Europe. Prlvatlzatlo+Panacea nuclear future Rippon, S. Nuclear News, Aug. 1994, 37, (lo), p. 41. The author discusses the energy policies in the United Kingdom.
for a
Contractors continua through commlaalonlng 95100422 Atom, Aug.-Sep. 1994, (435), p.31. Reports that many of the construction and supply contracts for Sizewell B go way beyond a delivery deadline, and some companies have been involved in the commissioning stages. Q5lOo423 Contractors were, and are, committed to Slaewell Atom, Aug.-Sep. 1994, (435), 28-29. Several hundred companies were contracted to Sizewell B. Many have invested in new plant and techniques specifically for the Sizewell project. For some, Sizewell was an incentive to invest in new capabilities. Between 1987 and 1994, Babcock Energy was instrumental in improving engineering, manufacturing, and inspection techniques, and now Sizewell B is probably the most advanced and highest quality nuclear power station in the world. Sizewell B is probably the first PWR where both the manufacturing and pre-service inspections of the reactor pressure vessel and incredibility of failure components, have been independently validated. The validation was performed at AEA Technology’ purpose-built Inspection -_ s _ _ Validation Cenire. 95100424 The course of true outage never ran ao smooth Harberts, C. Atom, Aug.-Sep. 1994, (435), 42-45. The author discusses how the outage performance has become a key issue at San Onofre when outages were identified as an area the station could improve in after they benchmarked themselves against other good performing nuclear plants. To improve the performance of outages the working structure of the entire organisation had to be radically changed. Effect of buoyancy on forced convection In a 95100425 cuaped duct Dong, 2. F. and Ebadian, M. A. Numerical Hear Transfer, Parr A, Applications. Jun. 1994. 25. (61. 743-755. In the event of a loss of coolant accident in a pressurized water reactor, swelling of the fuel rod cladding will lead to reduction of the subchannel flow area and worsening of the core heat transfer in the region of the blockage. The four-cusped duct is an ideal geometry for the simulation of such a channel blockage. Understanding the characteristics of flow and heat transfer in the cusped duct is essential for better design of the emergency core cooling system. Thus, in this paper, combined natural and forced convection in a vertical cusped duct has been investigated in the region of both hydrodynamically and thermally fully developed flow. Embedded Topical. 11th Topical Meeting on the 95100426 Technology of Fualon Energy Zeyher, A. Nuclear News, Aug. 1994, 37, (lo), 75-78. A report on the 11th Topical Meeting on the Technology of Fusion Energy held 20-23 June during the 1994 American Nuclear Society Annual Meeting in New Orleans. The lenary session on ‘New Develo ments in the U.S. Fusion Program’ pro s uced a very interesting talk by d tephen Dean, president of Fusion Power Associates, about applications of fusion technology outside the field of fusion reactors. The topices covered in ‘Near-Term Ap lication of Fusion Technologies’ included such subjects as plasma etcR.mg of semi-conductor integrated circuits. 95100427 Europe: The nuclear scene In the mld-19908. Weatem Europa Rippon, S. Nuclear News, Sep. 1994, 37, (ll), 52-54, 78, 80, 82-87. A review of the nuclear scene m Western Europe in the mid-1990s.