A SEDIMENT HISTORY OF SELLAFIELD DISCHARGES

被引：58

作者：

KERSHAW, PJ

WOODHEAD, DS

MALCOLM, SJ

ALLINGTON, DJ

LOVETT, MB

机构：

[1] Ministry of Agriculture, Fisheries and Food, Dicrectorate of Fisheries Research, Lowestoft

来源：

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY | 1990年 / 12卷 / 03期

关键词：

D O I：

10.1016/0265-931X(90)90024-P

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A suite of artificial radionuclides, discharged from the BNFL Sellafield works into the Irish Sea, has been measured in sediment cores taken from a nearby disused and undisturbed dock basin (Senhouse Dock, Maryport). This has provided a comprehensive record of Sellafield discharges from the early 1960s, including radionuclides for which discharge data are in incomplete A chronology was established by comparing a variety of radionuclide concentrations and isotope ratios in the core with the available information on decay-corrected discharges. This allowed an estimate to be made of the quantity of 238Pu discharged in the period 1959-1977 (94 ± 8 TBq) for which no discharge data exist. The transit time from discharge to incorporation in the surface sediment was in the order of 1-1·.5 y. Attempts to verify the sediment chronology with conventional 210Pbexcess dating met with difficulties because of uncertainties in the flux of 210Pb, linked to a local, anthropogenic source of 210Pb/226Ra. © 1990.

引用

页码：201 / 241

页数：41

共 69 条

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