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Uranium Ore and Concentrate Sampling; Echantillonnage des Minerais et des Concentres d'Uranium; Otbor prob uranovoj rudy i kontsentratov; Muestreo de Minerales y Concentrados de Uranio

Conference:

Abstract

The Grand Junction Office of the United States Atomic Energy Commission has been responsible for procuring large quantities of natural uranium in both ores and concentrates. The techniques used for sampling ores are necessarily different from those used for concentrates. Each step in the overall measurement and sampling systems for both ores and concentrates is discussed, giving particular attention to the accuracy and precision of that step. During the years 1948-1964, a total of 58 million tons of ore was sampled in about 40 different mechanical sampling plants in the western United States. All plants have been required to weigh, sample and analyse ore in accordance with practices satisfactory to the USAEC. The ordinary principles of ore sampling, as used for years in the mining industry, have been followed. However, sufficient check sampling and other tests were performed to ensure that the uranium content of the variety of ores sampled was as accurately determined as economically feasible. Concentrates containing about 129 000 t of U{sub 3}O{sub 8} were purchased from domestic producers during the last 17 years. This uranium was contained in approximately 10 000 lots, each of which was weighed, sampled, and analysed in accordance with carefully controlled procedures.  More>>
Authors:
McGinley, F. E.; Brown, D. L.; Langridge, R. W. [1] 
  1. United States Atomic Energy Commission, Grand Junction, CO (United States)
Publication Date:
Feb 15, 1966
Product Type:
Conference
Report Number:
IAEA-SM-67/30
Resource Relation:
Conference: Symposium on Nuclear Materials Management, Vienna (Austria), 30 Aug - 3 Sep 1965; Other Information: 5 refs., 6 tabs., 3 figs.; Related Information: In: Nuclear Materials Management. Proceedings of the Symposium on Nuclear Materials Management| 905 p.
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; ACCURACY; CONTRACTORS; NATURAL URANIUM; NUCLEAR MATERIALS MANAGEMENT; SAMPLE PREPARATION; SAMPLING; STATISTICS; URANIUM ORES; URANIUM OXIDES U3O8
OSTI ID:
22127236
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M2331082315
Submitting Site:
INIS
Size:
page(s) 375-391
Announcement Date:
Sep 12, 2013

Conference:

Citation Formats

McGinley, F. E., Brown, D. L., and Langridge, R. W. Uranium Ore and Concentrate Sampling; Echantillonnage des Minerais et des Concentres d'Uranium; Otbor prob uranovoj rudy i kontsentratov; Muestreo de Minerales y Concentrados de Uranio. IAEA: N. p., 1966. Web.
McGinley, F. E., Brown, D. L., & Langridge, R. W. Uranium Ore and Concentrate Sampling; Echantillonnage des Minerais et des Concentres d'Uranium; Otbor prob uranovoj rudy i kontsentratov; Muestreo de Minerales y Concentrados de Uranio. IAEA.
McGinley, F. E., Brown, D. L., and Langridge, R. W. 1966. "Uranium Ore and Concentrate Sampling; Echantillonnage des Minerais et des Concentres d'Uranium; Otbor prob uranovoj rudy i kontsentratov; Muestreo de Minerales y Concentrados de Uranio." IAEA.
@misc{etde_22127236,
title = {Uranium Ore and Concentrate Sampling; Echantillonnage des Minerais et des Concentres d'Uranium; Otbor prob uranovoj rudy i kontsentratov; Muestreo de Minerales y Concentrados de Uranio}
author = {McGinley, F. E., Brown, D. L., and Langridge, R. W.}
abstractNote = {The Grand Junction Office of the United States Atomic Energy Commission has been responsible for procuring large quantities of natural uranium in both ores and concentrates. The techniques used for sampling ores are necessarily different from those used for concentrates. Each step in the overall measurement and sampling systems for both ores and concentrates is discussed, giving particular attention to the accuracy and precision of that step. During the years 1948-1964, a total of 58 million tons of ore was sampled in about 40 different mechanical sampling plants in the western United States. All plants have been required to weigh, sample and analyse ore in accordance with practices satisfactory to the USAEC. The ordinary principles of ore sampling, as used for years in the mining industry, have been followed. However, sufficient check sampling and other tests were performed to ensure that the uranium content of the variety of ores sampled was as accurately determined as economically feasible. Concentrates containing about 129 000 t of U{sub 3}O{sub 8} were purchased from domestic producers during the last 17 years. This uranium was contained in approximately 10 000 lots, each of which was weighed, sampled, and analysed in accordance with carefully controlled procedures. These lots were received at USAEC-owned sampling facilities at Grand Junction or Weldon Spring, Missouri, both of which are contractor operated. The average lot consists of about 50 drums (55-gallon size) and weighs approximately 35 000 lb. Because concentrate varies so much in both physical and chemical characteristics, it is necessary to sample each drum. Through the years, various sampling systems were used, such as pipes, open auger, enclosed augers, and falling stream sampling. Falling stream sampling is the most accurate, provided precautions are taken to prevent changes in weight due to exposure to the atmosphere. Because of the tendency of concentrates to sorb or desorb moisture, depending upon the atmosphere to which they are exposed, special sub-sampling, drying, and sample preparation procedures were continuously developed to improve the accuracy and precision of the overall purchase sampling. Extensive use was made of statistics to analyse and interpret measurement and sampling evaluation data. (author) [French] Les services de la Commission de l'energie atomique situes a Grand Junction (Colorado) sont charges de fournir de grandes quantites d'uranium naturel sous forme de minerais ou de concentres. Les methodes utilisees pour echantillonner les minerais sont necessairement differentes de celles utilisees pour les concentres. Les auteurs etudient les differentes operations de mesure et d'echantillonnage pour les minerais et les concentres, en tenant plus particulierement compte de l'exactitude et de la precision de ces operations. Entre 1948 et 1964, 58 millions de tonnes de minerais au total ont ete echantillonnees dans 40 installations differentes d echantillonnage mecanique situees dans l'ouest des Etats-Unis. Toutes ces installations ont du peser, echantillonner et analyser le minerai selon des methodes agreees par la Commission de l'energie atomique. Les principes courants d'echantillonnage de minerai utilises depuis des annees dans l'industrie miniere sont appliques. Il est toutefois procede a des echantillonnages de controle et a d'autres essais pour s'assurer que la teneur en uranium des differents minerais echantillonnes est determinee avec toute la precision economiquement possible. Au cours des 17 dernieres annees, des concentres contenant environ 129 000 tonnes d'U{sub 3}O{sub 8} ont ete achetes a des producteurs du pays. Cet uranium se trouvait dans 10 000 lots environ, dont chacun a ete pese, echantillonne et analyse selon des methodes soigneusement controlees. Ces lots ont ete expedies aux installations d'echantillonnage de Grand Junction ou de Weldon Spring (Missouri), toutes deux propriete de la Commission de l'energie atomique mais dirigees par des exploitants sous contrat. Un lot moyen comprend environ 50 futs (de 210 litres) et pese environ 16 tonnes. Comme les caracteristiques physiques et chimiques de ces concentres varient considerablement d'un fut a l'autre, il est necessaire d'echantillonner chaque fut. Au cours de ces annees, on a eu recours a differents procedes d'echantillonnage - tubes, sondes ouvertes, sondes fermees ou ecoulement du minerai. Ce dernier procede est le plus precis a condition que l'on prenne les precautions requises pour prevenir les changements de poids resultant de l'exposition a l'atmosphere. Comme les concentres ont tendance a absorber l'humidite ambiante ou a perdre leur humidite selon les conditions atmospheriques auxquelles ils sont exposes, on a constamment mis au point des methodes speciales de sous-echantillonnage, de sechage et de preparation des echantillons en vue de rendre l'echantillonnage de tous les lots plus exact et plus precis. On a eu beaucoup recours a la statistique pour analyser et interpreter les mesures et les donnees pour l'evaluation des echantillonnages. (author) [Spanish] La oficina de Grand Junction de la Comision de Energia Atomica de los Estados Unidos ha tenido que adquirir grandes cantidades de uranio natural, tanto en forma de mineral como en forma de concentrado. Las tecnicas empleadas para el muestreo de minerales difieren necesariamente de las empleadas para los concentrados. Los autores de la memoria analizan las operaciones que integran los sistemas generales de medicion y muestreo de minerales y concentrados, prestando atencion especial a la exactitud y precision de cada una de ellas. Entre 1948 y 1964 se sacaron muestras de 58 millones de toneladas de mineral en unas 40 plantas de muestreo mecanico situadas en la parte occidental de los Estados Unidos. En todas estas plantas el mineral fue pesado, muestreado y analizado segun practicas aprobadas por la AEC de los Estados Unidos. Para las muestras se siguieron los principios normalmente aplicados en la industria minera; se efectuaron ademas, muestreos de verificacion y otras pruebas para garantizar que la determinacion del contenido de uranio de los diversos minerales se realizaba con toda la precision que permitian las consideraciones de orden economico. Durante los diecisiete ultimos anos se han adquirido de productores de los Estados Unidos unas 10 000 partidas de concentrados con un contenido total de 129 000 t de U{sub 3}O{sub 8}; cada una de estas partidas ha sido pesada, muestreada y analizada, con procedimientos cuidadosamente controlados, en las instalaciones de muestreo que la AEC posee en Grand Junction y en Weldon Spring (Missouri), ambas explotadas por contratistas. La partida tipica consiste en unos 50 barriles, con una capacidad de 209 litros cada uno, y pesa aproximadamente 16000kg. Como las caracteristicas fisicas y quimicas de los concentrados varian sobremanera es necesario tomar muestras. de cada barril. Durante estos anos se han empleado diversos sistemas de muestreo: por tubos, barrenas abiertas, barrenas cerradas, mueatreo en comente libre. Este ultimo es el mas exacto, a condicion de que se tomen las precauciones necesarias para impedir los cambios de peso debidos a la exposicion a los factores atmosfericos. Teniendo en cuenta la tendencia de los concentrados a perder o absorber humedad segun la atmosfera a que se hallan expuestos, se han ideado procedimientos especiales de submuestreo, secado y preparacion de muestras con objeto de aumentar la precision de las operaciones. Pata analizar e interpretar los datos proporcionados por las mediciones y el muestreo se recurre en gran medida a la estadistica. (author) [Russian] Otdelenie Komissii po atomnoj jenergii v Grand-Dzhankshin otvechaet za proizvodstvo bol'shih kolichestv prirodnogo urana v vide rud i koncentratov. Metody otbora prob rud objazatel'no otlichajutsja ot metodov, primenjaemyh v otnoshenii koncentratov. V doklade obsuzhdaetsja kazhdaja stupen' v obshhih sistemah izmerenija j otbora prob rud i koncentratov, pri jetom osoboe vnimanie udeljaetsja verojatnosti i tochnosti kazhdoj stupeni. V techenie 1948 - 1964 gg. bylo otobrano prob v obshhej slozhnosti iz 58 millionov tonn rudy priblizitel'no na 40 razlichnyh mehanicheskih analiticheskih ustanovkah na zapade Soedinennyh Shtatov. Na vseh jetih ustanovkah neobhodimo bylo vzvesit', otobrat' proby i proanalizirovat' rudu v sootvetstvii s praktikoj, priemlemoj dlja Komissii po atomnoj jenergii. Sobljudalis' obychnye principy otbora prob rudy, kotorye uzhe v techenie mnogih let ispol'zujutsja v gornorudnoj promyshlennosti. Odnako bylo proizvedeno dostatochnoe kolichestvo kontrol'nyh otborov prob i drugih ispytanij s tem, chtoby soderzhanie urana v razlichnyh otobrannyh probah rudy opredeljalos' s takoj stepen'ju tochnosti, kotoraja javljaetsja jekonomicheski osushhestvimoj. . Za poslednie 17 let u otechestvennyh proizvoditelej byli priobreteny koncentraty, soderzhashhie okolo 129 000 t U{sub O8}. Jetot uran soderzhalsja priblizitel'no v 10000 partijah, kazhdaja iz kotoryh byla vzveshena, oprobovana i proanalizirovana v sootvetstvii s tshhatel'no kontroliruemymi procedurami. Jeti partii postupali na ustanovki dlja otbora prob, kotorye prinadlezhat Komissii po atomnoj jenergii i jekspluatirujutsja po kontraktu, i nahodjatsja v Grand-Dzhankshine i Ujelden-Springe (shtat Missuri). Srednjaja partija sostoit priblizitel'no iz 50 metallicheskih bochek (ob'emom v 55 gallonov) i vesit okolo 35 000 funtov. Poskol'ku fizicheskie i himicheskie svojstva koncentrata sil'no razlichajutsja, neobhodimo vzjat' probu iz kazhdoj metallicheskoj bochki. Na protjazhenii mnogih let ispol'zovalis' razlichnye sistemy otbora prob, naprimer s pomoshh'ju trub,otkrytyh i zakrytyh burov i putem oprobovanija padajushhego potoka. Metod oprobovanija padajushhego potoka javljaetsja samym tochnym pri uslovii, chto predprinjaty mery predostorozhnosti dlja predotvrashhenija izmenenija vesa v rezul'tate atmosfernogo vlijanija. Vvidu tendencii koncentratov adssrbirovat' i terjat' vlagu v zavisimosti ot atmosfery, vlijaniju kotoroj oni podverzheny, postojanno razrabatyvalis' special'nye procedury vzjatija chasti iz proby, sushki i prigotovlenija prob s cel'ju povyshenija tochnosti i vernosti obshhego oprobovanija pokupaemyh rud. Shiroko ispol'zovalis' statisticheskie dannye dlja analiza i interpretacii dannyh izmerenija i ocenki otbora prob. (author)}
place = {IAEA}
year = {1966}
month = {Feb}
}