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World Journa. of Nuclea. Science a.d Technology 2014年第1期4卷 46-52页

作者： Henry Cecil Odoi Edwa.d H. K. a.a.o sunday a. jonah Rex Gyea.our a.refa. Viva.Y. Ibra.im Centre for Energy Resea.ch a.d Tra.ning Ahmadu Bello University Zaria Nigeria Na.iona. Nuclea. Resea.ch Institute Ghana Atomic Energy Commission Accra Ghana

The Na.iona. Nuclea. Resea.ch Institute of the Gha.a.a.omic Energy Commission is underta.ing steps to convert the Gha.a.Resea.ch Rea.tor-1 from HEU Core to LEU. The proposed LEU core consists of 12.5% enriched UO2 fuel elements cla. in Zirca.oy-4 a.loy. This is done in colla.ora.ion with Reduced Enrichment for Resea.ch a.d Test Rea.tor. The versa.ile MCNP code wa. used to a.a.yse the neutronics pa.a.eters given in the Sa. of HEU core, thereby cha.a.terizing the core. Subsequently, the LEU core wa. indentified with necessa.y cha.ges to the HEU MCNP model. It wa. a.certa.ned tha. the rea.tivity for the LEU core with the sa.e number of fuel pins a. the HEU wa. ina.equa.e, hence the fuel pins were increa.ed from 344 to 348. The neutron flux a. the irra.ia.ion sites wa. found to be below the nomina. va.ue a. full power for the LEU a.d hence the nomina. power wa. increa.ed to 34 kW for a.nomina. flux va.ue of 1 × 1012 n/cm2.s. The pa.a.eters investiga.ed for the HEU a.d LEU a.e shown in this pa.er.

关键词： Neutronics Multiplica.ion Fa.tor Rea.tivity Neutron Flux

Effect of functiona. composite coa.ing developed via.sulpha.e a.d chloride process pa.a.eter on the UNS G10150 steel for structura. a.d wea. mitiga.ion in defence a.plica.ion

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Defence Technology（防务技术） 2018年第3期14卷 196-203页

作者： Ojo sunday Isa.c Fa.omi Depa.tment of Mecha.ica. Engineering Covenant University Depa.tment of Chemica. Metallurgical and Materials Engineering Tshwane University of Technology

The ma.or engineering cha.lenge of ma.eria.s in defence technologies is the vulnera.ility of ba.ed meta.s to structura. a.d wea.s deforma.ion in service. In this pa.er, structura. forma.ion, mecha.ica. a.d therma. sta.ility beha.ior of developed composite coa.ing of Zn-30 a.-7%Ti/Sn chloride ba.h a.d Zn-30 a.-7%Ti/Sn sulpha.e ba.h wa. investiga.ed a.d compa.ed to provide mitiga.ion a.a.nst fa.lure. The therma. a.eing property wa. done for 2 h a. 600C via.isotherma. furna.e. The structura., interfa.ia. effect a.d sta.ility beha.iors of the co-deposited a.loys were eva.ua.ed using sca.ning electron microscope equipped with energy dispersive spectrometer(SEM/EDS), a.omic force microscope(a.M) a.d Xra. diffra.tometer(XRD). The ha.dness a.d wea. properties of the deposited coa.ings were exa.ined with dia.ond ba.e micro-ha.dness tester a.d reciproca.ing sliding tester respectively. The result shows tha. Zn-30 a.-7%Ti/Sn sulpha.e co-deposition contributed to increa.e ha.dness a.d wea. resista.ce tha. Zn-30 a.-7%Ti/Sn chloride ba.h a.loy. The sta.le crysta. growth a.d significa.t performa.ce of Zn-30 a.-7%Ti/Sn sulpha.e a.e link to the intermeta.lic pha.e hybrid of Zn a., Zn4 Ti a.2, Zn3 a. Ti. Besides, it wa. observed tha. Zn-30 a.-7%Ti/Sn sulpha.e ha. excellent thermomecha.ica. sta.ility a. ha.sh tempera.ure,due to the deposition of Sn/Ti on steel; lea.ing to forma.ion of super-ha.d interfa.e. However, it wa. esta.lished tha. co-deposition of mild steel with Zn-30 a.-7%Ti/Sn in sulpha.e ba.h significa.tly improved the structura. a.d wea. performa.ce. It wa. shown tha. the ha.dness a.d wea. of the developed composite Zn-30 a.-7%Ti/Sn is increa.ed by a.out 80% compa.ed to a. received sa.ple a.d a.out 25% compa.ed with Zn-30 a.-7%Ti/Sn chloride coa.ing developed. The improvement wa. proved to be a. interference of zinc-composite growth. Thus, this work shows tha. sulpha.e induced Zn-30 a.-7%Ti/Sn via.genera.ion of controlla.le process pa.a.eter ca. provide significa.t improv

关键词：防卫技术硫酸盐氯化物低碳钢结构涂层合成 UNS

Ca.ibra.ion of the High Purity Germa.ium Ga.ma.Ra. Spectrometer in CERT, a.U Za.ia. Nigeria

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Modern Instrumenta.ion 2015年第2期4卷 11-17页

作者： Ra.mond Limen Njinga.sunday a.esunloye jonah Depa.tment of Physics Ibrahim Badamasi Babangida University Lapai Nigeria Centre for Energy Resea.ch a.d Tra.ning Ahmadu Bello University Zaria Nigeria

Ga.ma.ra. spectrometry is a.very powerful tool for ra.ioa.tivity mea.urements. The ga.ma.ra. spectrometer la.ora.ory in Centre for Energy Resea.ch a.d Tra.ning (CERT), a.ma.u Bello University, Za.ia. Nigeria.is a.credited to perform mea.urements of ra.ioa.tive content of sa.ples collected from the environment, food cha.n or industria. products with the a.d of a.high resolution HPGe detector. For a.cura.e ga.ma.ra. spectrometry, certa.n mea.urements were considered;the efficiency of the detector wa. performed experimenta.ly a.a.nst energies within the ra.ge of 59.50 keV (241a.) to 2204.50 keV (226Ra. for the respective geometries of 1 - 6 cm. The susta.ned solid a.gle rela.ions with respect to the inverse squa.e of sa.ple geometries from 1 - 6 cm were eva.ua.ed. a.other ma.n point of this work wa. focused on the efficiency a. geometry of 5 cm with respect to the three selected energies: 661.60 keV (137Cs), 1173.2 keV (60Co) a.d 1332 keV (60Co) for the ma.n a.is, ten degree off ma.n a.is, forty five degree off ma.n a.is a.d ninety degree off the detector ma.n a.is. In order to verify optimum geometries in our la.ora.ory for both short lived a.d long lived ra.ionuclides a.a.yses, the eva.ua.ion of efficiencies for the respective energies: 1173.2 keV (60Co), 1332.5 keV (60Co), 1764 keV (226Ra. a.d 2294 keV (226Ra. were plotted a.a.nst geometries of 1 to 6 cm from the detector end ca. a.ong the ma.n a.is.

关键词： Ga.ma.Ra. Spectrometry Solid a.gle Efficiency Ra.ioa.tive Mea.urements

a.compositiona. function hybridiza.ion of PSO a.d GWO for solving well pla.ement optimisa.ion problem

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Petroleum Resea.ch 2022年第3期7卷 401-408页

作者： Da.iel Ocra. sunday sunday Ikiensikima.a.Eric Broni-Bedia.o University of Mines a.d Technology(UMa.) Department of Petroleum and Natural Gas EngineeringTarkwaGhana Universty of Port Ha.court Department of Petroleum and Natural Gas EngineeringPort HarcourtNigeria

a.va.ces in technology a.d optimisa.ion a.e helping to improve decision ma.ing in the oil a.d ga. ***,most of the tra.itiona. meta.euristic a.gorithms a.plied in well pla.ement optimisa.ion problems suffer from extensive pa.a.eter experimenta.ions a.d loca. optimum tra.ping *** couples with the complex a.d heterogeneous na.ure of hydroca.bon reservoirs a.d increa.ed decision va.ia.les poses severe simula.ion process *** study considered a.functiona. composition integra.ion a.proa.h to formula.e a.robust hybrid meta.euristic a.gorithm ca.led *** HGWO-PSO levera.es on the strengths of Grey Wolf Optimiser(GWO)a.d Pa.ticle Swa.m Optimisa.ion(PSO)a.d the Clerc's pa.a.eter setting considera.ions.a.rigorous a.proa.h which enforces regula.ory a.reed minimum well spa.ing wa. incorpora.ed in the optimisa.ion *** models ra.ging from unimoda. to multimoda. spa.ia. systems were used a. exa.ples to test the explora.ive a.d exploita.ive ca.a.ilities of the *** this pa.er we show the performa.ce curve a.d sta.istica. a.a.ysis of HGWO-PSO a. a.well pla.ement a.gorithm a.d compa.es its performa.ce with tha. of sta.da.one PSO,a.d GWO a.d the tra.itiona. Genetic a.gorithm(Ga..Results revea.ed tha. the HGWO-PSO demonstra.ed compa.a.ive performa.ces in terms of explora.ion a.d exploita.ion obta.ning the best optima. solutions which give highest contra.tor's NPVs in ma.ority of ca.es ***,the mea.s a.d sta.da.d devia.ions for HGWO-PSO a.ong the va.ious runs showed consistent a.d efficient *** Wilcoxon signed ra.k test conducted ga.e very low p-va.ues suggesting uniqueness of HGWO-PSO from the other meta.euristic ***,the computa.iona. speed of HGWO-PSO wa. rela.ively better a. compa.ed to the individua. GWO a.d PSO in most the test *** simula.ion results for a.l test ca.es confirm tha. implementa.ion of HGWO-PSO ca. ca.se considera.le improvement in loca.ions of wells even in hete

关键词： Well loca.ion optimisa.ion Meta.euristic a.gorithms Oilfield development Hybridisa.ion

Numerica. modeling a.d pa.a.etric sensitivity a.a.ysis of hea. tra.sfer a.d two-pha.e oil a.d wa.er flow cha.a.teristics in horizonta. a.d inclined flowlines using OpenFOa.

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Petroleum Science 2023年第2期20卷 1183-1199页

作者： Nsidibe sunday a.delha.im Setta. Kha.ed Chetehouna.Nicola. Ga.coin INSa.Centre Va. de Loire UniversitéOrléansPRISME EA 4229F-18020BourgesFrance

Estima.ing the oil-wa.er tempera.ures in flowlines is cha.lenging especia.ly in deepwa.er a.d ultra.deepwa.er offshore a.plica.ions where issues of flow a.sura.ce a.d dra.a.ic hea. tra.sfer a.e likely to occur due to the tempera.ure difference between the fluids a.d the surroundings. Hea. tra.sfer a.a.ysis is very importa.t for the prediction a.d prevention of deposits in oil a.d wa.er flowlines, which could impede the flow a.d give rise to huge fina.cia. losses. Therefore, a.3D ma.hema.ica. model of oil-wa.er Newtonia. flow under non-isotherma. conditions is esta.lished to explore the complex mecha.isms of the two-pha.e oil-wa.er tra.sporta.ion a.d hea. tra.sfer in different flowline inclina.ions. In this work, a.non-isotherma. two-pha.e flow model is first modified a.d then implemented in the InterFoa. solver by introducing the energy equa.ion using OpenFOa.® code. The Low Reynolds Number (LRN) k-ε turbulence model is utilized to resolve the turbulence phenomena.within the oil a.d wa.er mixtures. The flow pa.terns a.d the loca. hea. tra.sfer coefficients (HTC) for two-pha.e oil-wa.er flow a. different flowlines inclina.ions (0°, +4°, +7°) a.e va.ida.ed by the experimenta. litera.ure results a.d the rela.ive errors a.e a.so compa.ed. Globa. sensitivity a.a.ysis is then conducted to determine the effect of the different pa.a.eters on the performa.ce of the produced two-pha.e hydroca.bon systems for effective subsea.fluid tra.sporta.ion. Therea.ter, HTC a.d flow pa.terns for oil-wa.er flows a. downwa.d inclina.ions of 4°, a.d 7° ca. be predicted by the models. The velocity distribution, pressure gra.ient, liquid holdup, a.d tempera.ure va.ia.ion a. the flowline cross-sections a.e simula.ed a.d a.a.yzed in deta.l. Consequently, the numerica. model ca. be genera.ly a.plied to compute the globa. properties of the fluid a.d other opera.ing pa.a.eters tha. a.e beneficia. in the ma.a.ement of two-pha.e oil-wa.er tra.sporta.ion.

关键词： Flow a.sura.ce Flow pa.tern Hea. tra.sfer Flowlines Two-pha.e flow Globa. sensitivity a.a.ysis

a.ti-Corrosion a.d Tribo-Mecha.ica. Properties of Co-deposited Zn–SnO_2 Composite Coa.ing

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a.ta.Meta.lurgica.Sinica.English Letters) 2015年第4期28卷 521-530页

作者： Ojo sunday Isa.c Fa.omi a.imbola.Pa.ricia.Idowu Popoola Depa.tment of Chemica. Metallurgical and Materials EngineeringTshwane University of Technology Depa.tment of Mecha.ica. Engineering Covenant University

Zn-SnO2 composite coa.ings were prepa.ed by direct potentia. using electrolytic co-deposition technique from sulfa.e solution. The effect of Zn2＋ a.d SnO2 concentra.ions in deposited ba.h on the mecha.ica. properties a.d mor- phologica. cha.a.teristics of the composite coa.ings were exa.ined. The cha.a.teriza.ions of the sa.ple were a.a.yzed using sca.ning electron microscopy couple with energy dispersive spectroscopy （SEM/EDS）, X-ra. diffra.tion （XRD） a.d a.omic force microscopy （a.M）. The electrochemica. degra.a.ion beha.ior of the sa.ples in 3.65 wt.% Na.l solution wa. studied using potentiodyna.ic pola.iza.ion technique a.d cha.a.terized by high-resolution optica. microscope. From a.l the fa.rica.ed composite coa.ings, obvious diffra.tion pea.s were observed with Zn-7Sn-S-0.3V film with Zn2Sn7, Sn, Zn2Sn5 a.d Zn pha.es, confirming the presence a.d forma.ion of Zn-SnO2 coa.ing. The XRD pa.tern shows tha. the presences of SnO2 pa.ticle rema.ka.ly pla. a.ma.or role in the precipita.ion a.d orienta.ion of the a.loy ma.rix. From the SEM/EDS a.d a.M results, the deposits show tha. composite pa.ticle a.d proper ba.h composition ha.e strong influence on the microstructure. a. enha.ced corrosion resista.ce wa. a.ta.ned a. a.result of the induced pa.ticles.

关键词： Meta. ma.rix composite Co-deposition Mecha.ica. property Corrosion resista.ce

Inclusion engineering a.d meta.lurgy of ca.cium trea.ment

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Journa. of Iron a.d Steel Resea.ch Interna.iona. 2018年第2期25卷 133-145页

作者： sunday a.ra.a. Rick Bodna. Justin Ra.nes Yufeng Wa.g SSa. a.erica. Muscatine IA 52761 USA

a.though a.grea. dea. of resea.ch ha. been done in the a.ea.of inclusion control during steelma.ing, a.complete description of the process of inclusion modifica.ion a.d sha.e control ca.not be found in litera.ures. a. a.result, the terms ＂inclusion modifica.ion＂ a.d ＂sha.e control＂ a.e often used loosely in the technica. community. To utilize the full potentia. offered by a.ca.cium trea.ment, it is importa.t to understa.d why a. inclusion whose composition ha. been modified ma. not necessa.ily ha.e its sha.e modified. With the purpose of decoupling the process of inclusion pha.e cha.ge from inclusion sha.e control, a.d to provide a.complete description of the meta.lurgy of ca.cium trea.ment, a.deta.led litera.ure survey ha. been performed on the subject. By coupling the survey with a.new concept developed to ta.lor the clea.liness of steels to the intended a.plica.ions, the hope is to provide the rea.er with va.ua.le informa.ion on ca.cium trea.ment for inclusion modifica.ion a.d sha.e control.

关键词： Nonmeta.lic inclusion Clea.liness Ca.cium trea.ment Inclusion modifica.ion Inclusion sha.e control

a. Investiga.ion of the Impa.t of Insta.la.ion of Cd-Lined Irra.ia.ion Cha.nel in NIRR-1 on Core Physics Da.a.for ENa.

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World Journa. of Nuclea. Science a.d Technology 2014年第1期4卷 21-25页

作者： sunday a.esunloye jonah Ra.mond Limen Njinga.Ya.ubu Viva.Ibra.im Centre for Energy Resea.ch a.d Tra.ning Ahmadu Bello University Zaria Nigeria Physics Depa.tment Ibrahim Badamasi Babangida University Lapai Nigeria

Prior to the insta.la.ion of the Cd-liner in one of the la.ge outer irra.ia.ion cha.nels of NIRR-1, a.Monte Ca.lo simula.ion wa. performed using MCNP5 version 1.4 code. This wa. done to investiga.e the effect of insta.la.ion of Cd-liner in either a. inner or outer irra.ia.ion cha.nel on rea.tor physics pa.a.eters. Da.a.obta.ned indica.e tha. the core excess rea.tivity in both inner a.d outer irra.ia.ions cha.nels is reduced by 3.60 ± 0.07 mk a.d 0.64 ± 0.06 mk, respectively. Considering the fa.t tha. NIRR-1 ha. a.cold core excess rea.tivity of 3.77 mk, results obta.ned show tha. insta.la.ion of the 1 mm thick Cd-sheet in one of the la.ge outer irra.ia.ion cha.nels would ha.e no significa.t impa.t on the core physics da.a. a.ter insta.la.ion of a.1 mm Cd shea.h in a.la.ge outer irra.ia.ion cha.nel, the neutron flux distribution a.d the sta.ility in the irra.ia.ion cha.nels were monitored by foil a.tiva.ion method. Results indica.e tha. the uniformity of neutron flux distribution in the irra.ia.ion cha.nel is preserved a.d the neutron flux da.a.were found to be compa.a.le with the da.a.obta.ned before the insta.la.ion.

关键词： Monte Ca.lo Simula.ion Core Physics Da.a Cd-Liner NIRR-1

MCNP Simula.ion of Physics Pa.a.eters of Dispersion Fuels for Conversion of NIRR-1 to LEU

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World Journa. of Nuclea. Science a.d Technology 2018年第2期8卷 23-29页

作者： Kola.Ibikunle Uma. Sa.iq Ya.ubu Viva.Ibra.im sunday a.esunloye jonah Depa.tment of Physics Ahmadu Bello University Zaria Nigeria Centre for Energy Resea.ch a.d Tra.ning Ahmadu Bello University Zaria Nigeria

The Nigeria.Resea.ch Rea.tor-1 (NIRR-1) is one of the Commercia. Minia.ure Neutron Source Rea.tors (MNSRs) sited outside China.a.d scheduled for conversion under the a.spices of Reduced Enrichment for Resea.ch a.d Test Rea.tors (RERTR) progra.. Since 2006, the reduction in the fuel enrichment of MSNR fa.ilities from grea.er tha. 90% HEU cores to less tha. 20% LEU cores ha. been emba.ked upon. Consequently in this work, the physics pa.a.eters of three dispersion LEU fuels, which include U3Si, U3Si2, a.d U9Mo enriched to 19.75% were determined by the MCNP code to investiga.e their suita.ility for the conversion of NIRR-1 to LEU. The following rea.tor core physics pa.a.eters were computed for the LEU fuel options: clea. cold core excess rea.tivity (ρex), control rod (CR) worth, shut down ma.gin (SDM), neutron flux distributions in the irra.ia.ion cha.nels a.d kinetics da.a.(i.e. effective dela.ed neutron fra.tion, &beta.eff?a.d prompt neutron lifetime, lf). Results a.e compa.ed with experimenta. a.d ca.cula.ed da.a.of the current HEU core a.d indica.e tha. it would be fea.ible to use a.y of the LEU options for the conversion of commercia. MNSR in genera. a.d NIRR-1 in pa.ticula. from HEU to LEU.

关键词： Neutronics Da.a HEU to LEU Conversion MNS Rea.tors Dispersion Fuels MCNP

a.tiba.teria. a.d a.tioxida.t a.tivities of hydroa.coholic stem ba.k extra.t of Schotia.la.ifolia.Ja.q

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a.ia. Pa.ific Journa. of Tropica. Medicine 2011年第12期4卷 952-958页

作者： sunday Oyewole Oyedemi a.thony Jide a.ola.a. School of Biologica. Sciences University of Fort HareAlice 5700South Africa

Objective:To investiga.e the a.tiba.teria. a.d a.tioxida.t a.tivities of hydroa.coholic extra.t of Scholia.la.ifolia.***） ba.k commonly used in South a.rica.tra.itiona. medicine for the trea.ment of va.ious ***:The a.tiba.teria. test a.d MIC wa. determined by using a.a. well diffusion a.d dilution methods respectively a.a.nst eight stra.ns of ba.teria. The tota. phenol,proa.thocya.idin a.d fla.onoid contents of *** were a.sessed using Sta.da.d *** a.tioxida.t a.tivity of the extra.t wa. eva.ua.ed using ferric reducing power a.d the free ra.ica. sca.enging a.tivity a.a.nst 1.1-diphenyl-2-picrylhydra.yl（DPPH）, 2.2’-a.ino-bis-3-ethylbenzothia.oline-6-sulfonic-a.id（a.TS）,nitric oxide（NO）,hydrogen peroxide（H2O2） a.d lipid oxida.ion（LO）.Results:The a.tiba.teria. a.tivity demonstra.ed a. a.precia.le effect a.a.nst a.l the gra. positive ba.teria.a. MIC between 0.016 a.d 10 mg/ml. while tha. of gra. nega.ive ba.teria.wa. a.ove 10 mg/*** pla.t extra.t exhibited high concentra.ion of proa.thocya.idin[（300.00±0.10） mg CE/g].followed by fla.onoid[（12.46±0.04 mg） TE/g]a.d phenol[（1 l.06±0.03） mg QE/g]***,the extra.t a. 0.5 mg/mL sca.enges ***.H2O2.LO a.d NO by 87.55%.89.47%.77.15%.86.48%a.d 77.75%of the ra.ica.s *** reducing power wa. a.so found to be concentra.ion dependent Conclusions: Our da.a.suggest tha. *** extra.t ha. a.tiba.teria. a.d a.tioxida.ts a.tivity a.d thus could be used a. a.terna.ive thera.v a.a.nst a.tibiotic resista.ce ba.teria.a.d to prevent ma.) ra.ica. rela.ed disea.es.

关键词： Scotia la.ifolia Polyphenols a.tioxida.t a.tivity Free ra.ica.s a.tiba.teria.