Temporal trends of 137Cs in an abandoned reactor cooling reservoir

Mohler, H. Justin; Whicker, F.W.; Hinton, Thomas G.

doi:10.1016/s0265-931x(97)00016-7

Cited by 16 publications

(7 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…). Presumably, it is related to the processes of sediment sloughing in some areas of the central deepest part of the lake due to rather steep slopes of the bottom relief [6,30]. As it was mentioned above, due to the processes of fine sediment resuspension by southern winds in the shallow zone of the northern terrace and further withdrawal of the resuspended substances with flushing waters, the density of surface sediments in that zone was elevated, Fig.…”

Section: Discussionmentioning

confidence: 81%

<sup>137</sup>Cs in Lake Tapeliai, Lithuania

Moisejenkova¹,

Tarasiuk²,

Koviazina³

et al. 2012

Lith. J. Phys.

View full text Add to dashboard Cite

The results of an integrated study of the radiocesium behaviour in Lake Tapeliai by using not only conventional data on radiocesium activity concentrations in lake water and sediments but also a complex data set on seasonal variations and vertical profiles of standard water variables are presented. Radiocesium activity concentrations in lake water and a vertical structure of the water column considerably depend on radiocesiumenriched inflows of the coloured waters from the lake's swampy watershed. The global fallouts are mainly responsible for radiocesium inventory in lake sediments, where maximum values of radiocesium are found in the upper part of the water column above the ~5.4 m depth. The maximum values of radiocesium inventories in lake sediments are consistent with the respective densities of its deposits in the nearest forest soils. The main process of sediment activation is a direct sorption of radiocesium onto the sediment surface. Sedimentation rates in the lake mainly vary in the range of 3.5-5 mm yr -1 . The lake bottom feeding sources located mainly on the southern terrace as well as their related near-bottom flows reduce respective sedimentation and radiocesium inventories in sediments. The thermal regime of the near-bottom water in Lake Tapeliai in winter strongly depends on the meteorological conditions in autumn and may be classified as varying from super warm to moderately warm. Under conditions of a super warm regime, the elevated radiocesium concentrations in the near-bottom waters may be partially due to the thermodynamic mechanism of its release from the bottom sediments.

show abstract

Section: Discussionmentioning

confidence: 81%

<sup>137</sup>Cs in Lake Tapeliai, Lithuania

Moisejenkova¹,

Tarasiuk²,

Koviazina³

et al. 2012

Lith. J. Phys.

View full text Add to dashboard Cite

show abstract

“…Pond B has been separated hydrologically from other parts of the SRS cooling reservoir system since 1964, and the water chemistry of this reservoir has been determined by local watershed properties since that time [13]. The water in Pond B is characterized by low concentrations of potassium, which result in relatively high concentration ratios for 137 Cs in fishes from this reservoir [11,14]. The limnological characteristics of Pond B have been summarized by Whicker et al [11].…”

Section: Methodsmentioning

confidence: 99%

Seasonal variation in radiocesium levels of largemouth bass (Micropterus salmoides): Implications for humans and sensitive wildlife species

Peles

Philippi

Smith

et al. 2000

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

To examine seasonal variation in levels of radiocesium ( 137 Cs) within largemouth bass (Micropterus salmoides; N ϭ 589), fish were collected monthly over a one-year period from an abandoned reactor cooling reservoir. Month of collection, sex, age, and body mass (log transformed) were all significant factors influencing 137 Cs concentrations. Levels of 137 Cs reached a peak in late winter/early spring (February/March), and minimum values occurred in the fall (October). An asymmetric sawtooth model with a four-month period of increase and an eight-month period of decrease fit the data for monthly 137 Cs values significantly better than symmetric sinusoidal and sawtooth models. The mean concentration of 137 Cs for bass collected during all months was 7.09 Bq/g wet mass. All individuals examined, regardless of month, sex, age, or body mass, had 137 Cs levels (2.95-12.60 Bq/g) that were much higher than the maximum level (0.60 Bq/g wet mass) generally considered safe for human consumption. Radiocesium is relatively long-lived within this reservoir and will continue to remain an important issue in risk assessments for both humans and wildlife species.

show abstract

“…Radiocesium vertical profiles in sediments of aquatic systems are widely used for reconstruction of the history of the radioactive pollution, the evaluation of the total inventory and estimation of sedimentation rates (Alberts et al, 1989;Comans et al, 1989;Davison et al, 1993;Whicker et al, 1994;Robbins and Jasinski, 1995;Mohler et al, 1997;Eades et al, 1998;Rubio et al, 2003;Eriksson et al, 2004). However, in organics-rich sediments, radiocesium dating is considered to be unreliable (Eades et al, 1998) owing to its relatively high mobility and weak bonds with organics (Avery, 1996).…”

Section: Introductionmentioning

confidence: 99%