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Movement of Radioactive Effluents in Natural Waters at Hanford; Le Mouvement des Effluents Radioactifs dans les Eaux Naturelles a Hanford; 0414 0412 0418 0416 0414 ; Movimiento de los Efluentes Radiactivos en Aguas Naturales en Hanford

Conference:

Abstract

The Hanford plant is located in a semi-arid region on a very thick bed of unconsolidated water-deposited sediments resting on the basalt bedrock. This material may be considered in two geologic units, the lower bed being much less permeable than the upper. The Columbia River flows through the plant area and it is first used for human consumption about 55 km downstream from the last reactor plant. Low-level effluent from the reactors is discharged into the Columbia River after a one-to-three hours' hold-up period in retention basins. More than 60 radioisotopes have been identified in the effluent, nearly all of very short half-life. Depletion of various radioisotopes in river water by mechanisms other than decay is observed. This averages about 40% in the 55 km between the reactors and Pasco and is ascribed to biological assimilation and sedimentation processes. Low-level waste solutions from chemical processing plants are discharged into the ground where they seep through 70 to 120 m of sediments before reaching the local water table. Most of the radioactive material is immobilized by adsorption or other reactions during passage through the soil. The water and the few contaminants that reach the water-table move with the ground water towards  More>>
Authors:
Honstead, J. F.; Foster, R. F.; Bierschenk, W. H. [1] 
  1. Hanford Laboratories Operation, Hanford Atomic Products Operation, General Electric Company, Richland, WA (United States)
Publication Date:
Jul 01, 1960
Product Type:
Conference
Resource Relation:
Conference: Scientific Conference on the Disposal of Radioactive Wastes, Monaco (Monaco), 16-21 Nov 1959; Other Information: 33 refs., 5 figs., 1 tab.; Related Information: In: Disposal of Radioactive Wastes. Vol. II. Proceedings of the Scientific Conference on the Disposal of Radioactive Wastes| 586 p.
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; ADSORPTION; BASALT; COLUMBIA RIVER; FISSION PRODUCTS; GROUND WATER; LOW-LEVEL RADIOACTIVE WASTES; RADIOACTIVE EFFLUENTS; RADIOECOLOGICAL CONCENTRATION; RADIOISOTOPES; RADIONUCLIDE MIGRATION; WATER TABLES
OSTI ID:
22192429
Research Organizations:
International Atomic Energy Agency, Vienna (Austria); United Nations Educational, Scientific and Cultural Organization, Paris (France); Food and Agriculture Organization, Rome (Italy)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M3553016918
Submitting Site:
INIS
Size:
page(s) 385-399
Announcement Date:
Feb 20, 2014

Conference:

Citation Formats

Honstead, J. F., Foster, R. F., and Bierschenk, W. H. Movement of Radioactive Effluents in Natural Waters at Hanford; Le Mouvement des Effluents Radioactifs dans les Eaux Naturelles a Hanford; 0414 0412 0418 0416 0414 ; Movimiento de los Efluentes Radiactivos en Aguas Naturales en Hanford. IAEA: N. p., 1960. Web.
Honstead, J. F., Foster, R. F., & Bierschenk, W. H. Movement of Radioactive Effluents in Natural Waters at Hanford; Le Mouvement des Effluents Radioactifs dans les Eaux Naturelles a Hanford; 0414 0412 0418 0416 0414 ; Movimiento de los Efluentes Radiactivos en Aguas Naturales en Hanford. IAEA.
Honstead, J. F., Foster, R. F., and Bierschenk, W. H. 1960. "Movement of Radioactive Effluents in Natural Waters at Hanford; Le Mouvement des Effluents Radioactifs dans les Eaux Naturelles a Hanford; 0414 0412 0418 0416 0414 ; Movimiento de los Efluentes Radiactivos en Aguas Naturales en Hanford." IAEA.
@misc{etde_22192429,
title = {Movement of Radioactive Effluents in Natural Waters at Hanford; Le Mouvement des Effluents Radioactifs dans les Eaux Naturelles a Hanford; 0414 0412 0418 0416 0414 ; Movimiento de los Efluentes Radiactivos en Aguas Naturales en Hanford}
author = {Honstead, J. F., Foster, R. F., and Bierschenk, W. H.}
abstractNote = {The Hanford plant is located in a semi-arid region on a very thick bed of unconsolidated water-deposited sediments resting on the basalt bedrock. This material may be considered in two geologic units, the lower bed being much less permeable than the upper. The Columbia River flows through the plant area and it is first used for human consumption about 55 km downstream from the last reactor plant. Low-level effluent from the reactors is discharged into the Columbia River after a one-to-three hours' hold-up period in retention basins. More than 60 radioisotopes have been identified in the effluent, nearly all of very short half-life. Depletion of various radioisotopes in river water by mechanisms other than decay is observed. This averages about 40% in the 55 km between the reactors and Pasco and is ascribed to biological assimilation and sedimentation processes. Low-level waste solutions from chemical processing plants are discharged into the ground where they seep through 70 to 120 m of sediments before reaching the local water table. Most of the radioactive material is immobilized by adsorption or other reactions during passage through the soil. The water and the few contaminants that reach the water-table move with the ground water towards the Columbia River. The rate and direction of travel are determined by the form of the water-table surface and the hydraulic characteristics of the transmitting aquifers. The local water-table configuration has been radically affected by the disposal of large volumes of water. From the gradient and the measured permeabilities of the aquifers an average 'travel time' for water of 180 years is estimated. Is is recognized that the maximum velocity may be several times the average. However, the effect of adsorption or other reactions is to greatly slow down the movement of dissolved material relative to the rate of movement of the water. No movement of fission products from the disposal sites to the river has been detected. (author) [French] L'installation de Hanford se trouve dans une region semi-aride-de sediments non consolides en couche tres epaisse, qui ont ete deposes par les eaux et reposent sur un lit rocheux basaltique. Ces roches forment deux couches geologiques, la couche inferieure etant beaucoup moins permeable que la couche superieure. La Columbia traverse les terrains de l'installation et ce n'est qu'a environ 55 kilometres en aval du dernier reacteur qu'on commence a utiliser les eaux pour la consommation humaine. Les effluents de faible intensite provenant des reacteurs sont evacues dans la Columbia apres un sejour d'une a trqis heuges dans des reservoirs. Dans les effluents, on a pu identifier plus de 60 radioisotopes, qui, pour la plupart, ont y une tres courte periode. On a observe l'appauvrissement de l'eau fluviale en plusieurs radioisotopes par suite de mecanismes autres que la desintegration. Cet appauvrissement atteint 40% en moyenne sur les 55 kilometres qui separent les reacteurs et Pasco; il serait du a des processus d'assimilation biologique et de sedimentation. Les solutions de dechets de faible intensite provenant des usines de traitement chimique sont evacuees dans le sol ou elles filtrent a travers les sediments sur une profondeur de 70 a 120 metres avant d'atteindre la nappe aquifere. Pendant leur passage a travers le sol, la plupart des substances radioactives sont retenues par adsorption ou par d'autres reactions. L'eau et les quelques contaminants qui atteignent le niveau hydrostatique se deplacent avec les eaux souterraines en direction de la Columbia. La vitesse et la direction de ce deplacement sont determines par la forme de la surface piezometrique et les caracteristiques hydrauliques de l'aquifere. La configuration locale de la nappe a ete fortement influencee par l'evacuation de grandes quantites d'eau. Compte tenu du gradient hydraulique et du degre de permeabilite des aquiferes, on estime a 180 annees la duree moyenne du deplacement de J'eau. On reconnait que la vitesse maximum peut etre plusieurs fois superieure a cette moyenne. Cependant, l'adsorption ou les autres reactions ont pour effet de ralentir considerablement le mouvement des matieres dissoutes par rapport a la vitesse de deplacement de l'eau. On n'a decele aucun mouvement de produits de fissino entre les lieux d'evacuation et le fleuve. (author) [Spanish] La instalacion atomica de Hanford esta situada en un terreno semiarido asentado sobre una capa muy espesa de sedimentos sin consolidar depositados por el agua, que descansa sobre un lecho rocoso de basalto. Estos materiales pueden considerarse como dos formaciones geologicas distintas, pues la capa inferior es mucho menos permeable que la superior. El rio Columbia atraviesa los terrenos de la instalacion y el primer lugar donde sus aguas se utilizan para el consumo humano se encuentra a unos 55 km, rio abajo, del ultimo reactor. El efluente de baja actividad originado por los reactores se descarga en el rio despues de retenerlo de una a tres horas en estanques dispuestos al efecto. En el efluente se han detectado mas de 60 radioisotopos, casi todos ellos de periodo muy corto. Se ha observado que el agotamiento de algunos radioisotopos en las aguas del rio no solo se debe a procesos de desintegracion. Este agotamiento alcanza un valor medio del 40 por ciento en los 55 km que hay de los reactores a Pasco, y se supone que es el. efecto de procesos biologicos de asimilacion y sedimentacion. Los desechos liquidos de baja 'actividad procedentes de las plantas de tratamiento quimico se descargan en el terreno, donde se filtran a traves de sedimentos de 70 a 120 metros de espesor antes de alcanzar el manto freatico de la localidad. La mayor parte de las sustancias radiactivas quedan inmovilizadas por adsorcion u otras reacciones que tienen lugar a su paso a traves del terreno. El agua y las escasas sustancias contaminantes que llegan al manto freatico se desplazan con las aguas subterraneas hacia el rio Columbia. La velocidad y direccion de desplazamiento dependen de la forma de la superficie del manto y de las caracteristicas hidraulicas de las capas acuiferas portadoras. La forma del manto freatico ha sufrido una profunda modificacion debido a la evacuacion de grandes cantidades de agua. Basandose en la pendiente de las capas acuiferas y en las mediciones de su permeabilidad, se ha calculado que el desplazamiento dura por termino medio 180 anos. Se admite que la velocidad maxima puede ser varias veces superior a la media senalada. Sin embargo, el efecto de la adsorcion o de otras reacciones es disminuir considerablemente la velocidad de desplazamiento de las sustancias radiactivas, en relacion con la velocidad de las aguas. No hay indicios de que los productos de fision se esten desplazando desde los lugares de evacuacion hacia el rio. (author) [Russian] Hjenfordskij zavod raspolozhen v poluzasushlivom rajone na ochen' tolstom sloe netverdyh, soderzhashhih vodu otlozhenij, na korennoj bazal'tovoj porode. Takim obrazom mozhno rassmatrivat' dve geologicheskih porody, iz kotoryh nizhnjaja znachitel'no menee pronicaema. Reka Kolumbija protekaet cherez territoriju zavoda, i ee voda ispol'zuetsja dlja potreblenija tol'ko v 55 km vniz po techeniju ot poslednej ustanovki. Nizkoaktivnye zhidkie othody iz reaktorov slivajutsja v reku Kolumbiju posle 1-3 chasov vyderzhki v special'nyh bassejnah-otstojnikah. V takih othodah obnaruzheno bolee 60 radioizotopov, prichem pochti vse iz nih imejut ochen' korotkij period poluraspada. Rassmatrivajutsja voprosy obednenija, ne vkljuchaja obychnyj raspad, razlichnyh radioizotopov v rechnoj vode pomimo obychnogo raspada. Na rasstojanii 55 km mezhdu reaktorami i Pasko takoe obednenie v srednem sostavljaet 40% i ob{sup j}asnjaetsja processami biologicheskogo pogloshhenija i osazhdenija. Nizkoaktivnye rastvory zhidkih othodov s himicheskih zavodov po obrabotke topliva udaljajutsja v zemlju; oni dolzhny prosochit'sja cherez 70-120 metrov osadochnyh porod, prezhde chem dostignut podzemnyh vod. Bol'shinstvo radioaktivnyh materialov zaderzhivaetsja putem pogloshhenija ili drugih reakcij pri prohozhdenii cherez pochvu. Ochishhennaja takim obrazom voda i neznachitel'nye othody, dostigajushhie podzemnyh vod, napravljajutsja vmeste s nimi k reke Kolumbii. Skorost' i napravlenie opredeljajutsja formoj vodnogo gorizonta i gidravlicheskimi harakteristikami vodonosnyh plastov. Bol'shie ob{sup e}my vody, slivaemye v grunt, okazali korjonnoe izmenenie na harakter gorizonta podzemnyh vod. Ishodja iz izmerennoj pronicaemosti vodonosnyh plastov, srednee vremja prohozhdenija vody ocenivaetsja v 180 let. Priznaetsja takzhe to, chto maksimal'naja skorost' mozhet znachitel'no prevyshat' srednjuju velichinu. Odnako, vlijanie pogloshhenija ili drugih reakcij ochen' sil'no zamedljajut dvizhenie rastvorennogo materiala po otnosheniju k skorosti dvizhenija vody. Ne bylo obnaruzheno proniknovenija produktov delenija iz rajonov udalenija v rechnuju vodu. (author)}
place = {IAEA}
year = {1960}
month = {Jul}
}