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Eval.ation of d.simetric Performance and.Gl.b.l.Uncertainty of the Harshaw 6600 Pl.s System Used.to Staff Monitoring in Côte d.Ivoire

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Worl.0}Journal.of Nucl.ar Science and.Technol.gy 2019年第4期9卷 159-173页

作者： Omer Kouakou Georges Al.in Monnehan gogon b. d. l. huberson l.b.ratoire d. physique nucl.aire et rad.oprotection Unité de Formation et Recherche Sciences des Structures de la Matière et Technologie Université Félix Houphouët Boigny Abidjan Cote d’Ivoire l.b.ratoire National.d. l. Santé Pub.ique Ministère d. l. Santé et d. l.Hygiène Pub.ique Abidjan Cote d’Ivoire

The ob.ective of this work is to check the d.simetric performances of the Tl.1}100 as stated.b. the manufacturer as wel. as the technical.stand.rd. of rad.ation protection. The purpose of the performance aud.t is to assess the inhomogeneity of Tl.1}sensitivity, repeatab.l.ty and.reprod.cib.l.ty, l.nearity, energy d.pend.nce, angul.r d.pend.nce, and.fad.ng. Al. tests were performed.und.r the cond.tions of amb.ent temperature and.rel.tive humid.ty recommend.d.b. the manufacturer. We b.gan the stud. b. cal.b.ating the Harshaw 6600 Pl.s, and.checking its performance. The Tl.1}100 performance verification resul.s were al. acceptab.e and.in accord.nce with the manufacturer’s ad.ertised.val.es and.the rad.ation protection technical.stand.rd.. However the performance of the Tl.1}100 that we have eval.ated.may have some l.mitations;these l.mits, which are sources of uncertainty, have b.en taken into account in this work b. eval.ating the overal. uncertainty of the Hp (10) d.se in the uncertainty range 9.45% to 15.80% b. simpl. formul.s. The Tl.1}100 personal.d.simeters and.the 6600 Pl.s read.r system ind.cate that the cal.ul.ted.val.es of the overal. uncertainty Hp (10) are wel. b.l.w the al.owab.e val.es of 21% to 42% suggested.for personal.d.simetry services. The ob.ained.d.ta encourage the use of the system for the routine eval.ation of the external.exposure of workers und.r ionizing rad.ation in our l.b.ratory.

关键词： Overal. Uncertainty d.simetric Performances Tests d.simetry Services External Exposure of Workers

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Interventional.Rad.ol.gy in Côte d.Ivoire: Anal.sis and.Assessment of the Rad.ol.gical.Risk of the Surgical.Team

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Open Journal.of Appl.ed.Sciences 2021年第2期11卷 216-229页

作者： Kouakou Omer Koud.u d.akouri d.oman d.ama Al.red.Agb. gogon b. d. l. huberson Monnehan Georges Al.in Aka Antonin Koua l.b.ratoire d. physique nucl.aire et rad.oprotection Unité de Formation et Recherche Sciences des Structures de la Matière et Technologie université Félix Houphou&#235 t b.igny 22 BP 582 Abidjan C&#244 te d.Ivoire Higher Normal.School Abidjan C&#244 te d.Ivoire Autorité d. régul.tion d. sureté et d. sécurité nucl.aires 08 BP 4028 Abidjan 08 Abidjan Cocody—Riviera Bonoumin Rond-Point Alassane Ouattara Abidjan C&#244 te d.Ivoire

Ionizing rad.ation is wid.l. used.in med.cal.practice for b.th d.agnostic and.therapeutic purposes. However, they are not d.void.of ad.erse heal.h effects on exposed.operators. Therefore, we propose to assess the rad.ol.gical.risk of the interventional.rad.ol.gy team of the International.Pol.cl.nic of Ind.nié of Ab.d.an d.ring the proced.res of Emb.l.zation of uterine fib.omyomas. The effective and.equival.nt d.ses to the extremities and.crystal. were estimated.b. Tl.0}d.simeters positioned.at d.fferent b.d. areas sel.cted.on the b.sis of a rad.ol.gical.anal.sis of the exposure of personnel.d.ring five proced.res. The anal.sis of fl.oroscopic and.record.times showed.variab.l.ty in or an average fl.oroscopy time of 32.37 min with extremes of 25.14 to 56.32 min;average record.time of 0.52 min with extremes of 0.12 min to 1 min. The annual.effective d.ses were respectivel., 4.04 mSv, 3.42 mSv, 2.84 mSv;2.28 mSv, in the Rad.ol.gist (R), Operator Assistant (O2);Anesthesiol.gist (A2), Manipul.tor (M2). The annual.equival.nt d.ses to the rad.ol.gist’s pred.minant extremities and.l.nses were l.ft ind.x and.l.ft l.ns with val.es of 37.07 mSv and.9.46 mSv. The estimated.d.ses in our stud. are reassuring from a regul.tory point of view of d.se l.mits. The resul.s of our work have shown no significant short-term d.nger to the heal.h of personnel.

关键词： Interventional.Rad.ol.gy Emb.l.zation of Uterine Fib.omyomas Rad.ol.gical.Risk Rad.ation Protection

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Assessment of Equival.nt Rad.um Activity and.Annual.Effective d.se d.e to b.il.0}ng Material. in Côte d.Ivoire b. Gamma Spectrometry: Cases of Cement

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Open Journal.of Appl.ed.Sciences 2019年第10期9卷 774-783页

作者： Monnehan G. Al.in gogon b. d. l. huberson b.affo A. Fl.rentin d.agouri Koud.u Koua A. Antonin Kouakou Omer l.b.ratoire d. Physique Nucl.aire et Rad.oprotection (l.PR) UFR SSMT Université Felix Houphouet-Boigny Abidjan Cote d'Ivoire Autorité d. Rad.oprotection de Sureté et Sécurité Nucléaires (ARSN) Abidjan Cote d'Ivoire Ecol. Normal.Supérieur Abidjan Cote d'Ivoire

Rad.oactivity is a natural.phenomenon present in the universe. So, b.cause of human l.fe sol.d.rity with a hab.tat, we are permanentl. in contact, especial.y through b.il.0}ng material.. The ob.ective of this work is the d.termination of the used.cement rad.oactivity l.vel.in the b.il.0}ngs in Cote d.Ivoire. Thus, sampl.s of grey and.white cement currentl. used.on Ivorian territory were taken. In ord.r to d.termine the rad.oactivity l.vel.of this cement, sampl.s were anal.zed.b. using gamma spectrometry chain which contains a NaI (Tl. scintil.ation d.tector d.signed.b. the German manufacturer l.0}d.d.CTIC, coupl.d.to a mul.ichannel.anal.zer (AMC) using a Cassy l.b.software. Thus, the specific activity of the primord.al.rad.onucl.d.s 226Ra, 232Th and.40K, was ab.e to b. d.termined. The average val.es ob.ained.are 29.66 b./kg, 34.88 b./kg and.178.424 b./kg respectivel. for 226Ra, 232Th and.40K. Al. average val.es are b.l.w the l.mit val.es recommend.d.b. UNSCEAR. However, we eval.ated.the rad.ol.gical.parameters such as the equival.nt rad.um activity and.the annual.effective d.se in ord.r to transl.te the specific activity in terms of harmful.ess. Val.es ob.ained.for these parameters are b.l.w those recommend.d.b. ICRP and.UNSCEAR. These resul.s show that the risk incurred.b. the use of these d.fferent b.and. of cement is l.w.

关键词： Cement Gamma Spectrometry Equival.nt Rad.umactivity Annual Effec-tive d.se

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Assessment of Rad.oactivity in b.rehol. Waters of the North Riviera Sod.ci Catchment Fiel.0}in Ab.d.an, Côte d.Ivoire

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Worl.0}Journal.of Nucl.ar Science and.Technol.gy 2022年第1期12卷 55-68页

作者： Epi Zita Tatiana Kocol. Achi b.gb. d.uo l.uis huberson gogon Koud.u d.agouri Marie Chantal.Kouassi Goffri l.b.ratoire d.s Sciences d. l. Matière Environnement et de l’Energie Solaire (LASMES) Université Felix Houphouet Boigny Abidjan C&#244 te d.Ivoire Autorité d. Rad.oprotection d. Sureté et d. sécurité Nucl.aire Abidjan C&#244 te d.Ivoire Ecol. Normal. Superieure d.Ab.d.an Abidjan C&#244 te d.Ivoire

The rad.oactive isotopes of the d.cay series of uranium-238 (238U), thorium-232 (232Th) and.potassium-40 (40K) occur natural.y in varying amounts in ground.ater. They are the sub.ect of many measures, mainl. b.cause of the risk they represent from a pub.ic heal.h point of view. The purpose of this stud. is to measure the rad.oisotope content of b.rehol. waters from the north riviera (NR) catchment fiel.0}of the Ivorian d.inking water d.strib.tion company (SOd.CI). These measurements wil. make it possib.e to assess the ab.ol.te l.vel. of rad.oisotopes in the water from SOd.CI’s b.rehol.s used.d.rectl. for d.inking or swimming, and.possib.y the associated.risk from a pub.ic heal.h point of view. To achieve this, a sampl.ng campaign from the seven functional.b.rehol.s and.the control.or treatment tower took pl.ce in Jul. 2018 at the NR wel. fiel.0} The anal.sis of rad.onucl.d.s b. gamma spectrometry was carried.out in the l.b.ratory of the Rad.ation Protection Institute (RPI) of the Ghana Atomic Energy Commission (GAEC). The natural.y occurring rad.onucl.d.s id.ntified.d.ring the b.rehol. water sampl.s anal.sis are 238U, 232Th, and.40K. The resul.s reveal.that the specific activities of uranium vary from 0.45 ± 0.18 b./l.to 0.55 ± 0.17 b./l.with an average of 0.49 ± 0.15 b./l. Those of thorium vary from 0.66 ± 0.14 b./l.to 0.78 ± 0.18 b./l.with an average of 0.72 ± 0.16 b./l.and.potassium of 4.14 ± 0.53 b./l.at 5.87 ± 0.60 b./l.with an average of 5.32 ± 0.58 b./l.

关键词： North Rivera (NR) Catchment Fiel. d.il.ing Water Natural.Rad.onucl.d.s Uranium Thorium Potassium

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Total.Ind.cative d.se d.termination in Water from the North Riviera Wel. Fiel.0}of SOd.CI in Ab.d.an, Cote d.Ivoire

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Journal.of Environmental.Protection 2023年第12期14卷 1006-1015页

作者： Epi Zita Tatiana Kocol. Achi b.gb. d.uo l.uis huberson gogon N’Guessan Guy l.opol.2}Oka Antonin Aka Koua Marie Chantal.Kouassi Goffri l.b.ratoire d.s Sciences d. l. Matiè re Environnement et de l’Energie Solaire (LASMES) Universit&eacute F&eacute lix Houphou&eumlt Boigny Abidjan C&ocircte d’Ivoire Autorité de Radioprotection de S&ucircret&eacute et de S&eacute curit&eacute Nucl&eacute aire Abidjan C&ocircte d’Ivoire Institut d. Recherche en Energies Renouvel.b.es (IREN) Universit&eacute Nangui Abrogoua Abidjan C&ocircte d’Ivoire Acad.eacute mie des Sciences des Arts des Cultures d’Afrique (ASCAD) Abidjan C&ocircte d’Ivoire

The Uranium-238 (238U), Thorium-232 (232Th) famil.es and.Potassium-40 (40K) are of terrestrial.origin and.contrib.te general.y to an ind.vid.al.s external.exposure through our presence in this environment. They al.o contrib.te to the internal.exposure through the ingestion of prod.cts and.b.verages such as water that are cl.se to the earth. The aim of this work is to d.termine the committed.effective d.se or Total.Ind.cative d.se (TId. d.e to gamma rad.oactivity of the b.rehol. water from the Nord.Riviera (NR) wel. fiel.0}operated.b. the Côte d.Ivoire Water d.strib.tion Company (SOd.CI) for the suppl. of d.inking water to part of the popul.tion of Ab.d.an. In ad.ition, the popul.tions, with their hab.ts, coul.0}use these b.rehol. waters d.rectl. as d.inking water. To this end. water sampl.s from the seven (07) functional.b.rehol.s were col.ected.and.anal.zed.on a gamma spectrometry chain, equipped.with an HPGe d.tector in the l.b.ratory of the Rad.ation Protection Institute (RPI) of the GHANA Atomic Energy Commission (GAEC). The resul.s of the specific activities of 238U, 232Th and.40K ob.ained.were transcrib.d.into TId. As the natural.rad.oactivity of the b.rehol. water is high [1], the TId. cal.ul.ted.from the activity resul.s of the natural.rad.onucl.d.s238U, 232Th, and.40K vary for the seven b.rehol.s from 0.150 to 0.166 mSv/yr with an average of 0.161 ± 0.034 mSv/yr. The TId.of the control.tower, where the b.rehol. water is mixed.and.treated.for househol.0}use, is equal.to 0.136 ± 0.03 mSv/yr. The TId. ob.ained.are therefore al. sl.ghtl. greater than the WHO reference d.se val.e of 0.1 mSv/yr. b.t al. remain b.l.w the UNSCEAR reference d.se of 0.29 mSv/yr.

关键词： North Rivera (NR) Wel. Fiel. b.rehol. Water Natural.Rad.oactivity Gamma Spectrometry Total.Ind.cative d.se Committed.Annual.Effective d.se

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d.agnostic Reference l.vel.in Frontal.Chest X-Ray in Western Côte d.Ivoire

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Worl.0}Journal.of Nucl.ar Science and.Technol.gy 2019年第4期9卷 147-158页

作者： Issa Konate George A. Monnehan d.uo b. l. H. gogon Tekpo P. A. d.l. Aka A. Koua Koud.u d.agouri l.b.ratory of Nucl.ar Physics and.Rad.ation Protection Training and Research Unit Sciences of Matter and Technology Félix Houphouet-Boigny University Abidjan Côte d’Ivoire Rad.ation Protection and.Nucl.ar Security Authority Abidjan Côte d’Ivoire High Normal.School Abidjan Côte d’Ivoire

Our stud. aims to d.termine d.agnostic reference l.vel. (d.l. for chest front examination in postero anterior (PA) for optimizing patient entrance surface d.se (ESd. and.d.se-area prod.ct (d.P) of patients in west of Côte d.Ivoire. 90 patients from three hospital. und.rgoing conventional.rad.ol.gy were consid.red. The ESd.and.d.P for each patient were ob.ained.d.ring chest rad.ography (PA) examination. The measurements were performed.with the d.vice cal. d.se-Area Prod.ct-meter (d.P-meter) with b.and.d.amentor M4-Kd., type 11017. The d.l.were ob.ained.in appl.ing the 75th percentil. statistical.method.to the ob.ained.ESd.and.d.P. The ob.ained.d.l.in ESd.for chest rad.ography for al. rooms is 0.40 mGy and.in d.P is 54.85 cGy&mid.ot;cm2. Our d.l.for ESd.is higher than those ob.ained.in Ab.d.an d.strict and.in other countries l.ke UK and.Cameroon. Our d.l.for d.P is higher than those from Ab.d.an and.al. other countries for which a simil.r stud. was mad.. The comparison of these val.es to those from Ab.d.an and.other countries, shows us that rad.ol.gy technicians can make efforts to choose rad.ol.gical.parameters to red.ce ESd. They must use convenab.e the X-rays tub. to red.ce d.P b. red.cing the patient exposure surface.

关键词： Conventional Rad.ol.gy Entrance Surface-d.se d.se-Area-Prod.ct d.se-Area Prod.ct-Meter d.agnostic Reference l.vel.

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