scholarly journals Studies on the Rain Scavenging Process of Tritium in a Tropical Site at Narora in India

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Y. P. Gautam ◽  
Saivajay Sharma ◽  
A. K. Sharma ◽  
Aviansh Kumar ◽  
P. M. Ravi ◽  
...  
Keyword(s):  
Wet Deposition ◽  
Activity Ratio ◽  
Specific Activity ◽  
Deposition Velocity ◽  
Ground Level ◽  
Atomic Power Station ◽  
Tropical Region ◽  
Power Station ◽  
Data Set ◽  
Average Value

This study presents the results of systematic experiments on tritium (3H) concentrations in ground level air against those in rainwater near a pressurized heavy water reactor in a tropical region. The samples were collected over the rainy season of year 2011 from eight locations in the environment around Narora Atomic Power Station. The specific activity ratio of 3H between rainwater and air moisture at ground level was calculated for each data set. The average specific activity ratio was found to be ranged from 0.12 to 1.1. A correlation ( to 0.76, ) was observed between the total rain hours in a day and the rainwater 3H activity. Higher rain duration with slower rain rate yielded higher 3H concentrations as more time was available for the scavenging/wash-out process to take effect together with lower dilution. Annual tritium (HTO) wet deposition has been measured and calculated for the year 2011 within 0.8 km distance from 145 m high stack of Narora Atomic Power Station (NAPS) at nine locations in different directions. The range of deposition velocity, (m·s−1), at nine locations for the years 2011 is found to be from 4.43E − 04 to 6.42E − 03. The average value for wet deposition velocity for NAPS site is estimated as 3.17E − 03 m·s−1.

SPATIAL MAPPING OF URANIUM IN GROUNDWATER AND RISK ASSESSMENT AROUND AN ATOMIC POWER STATION IN INDIA

2016 ◽  
Vol 15 (4) ◽  
pp. 783-790 ◽  
Author(s):  
Vinod Kumar Garg ◽  
Manbir Singh ◽  
Yogendra Prakash Gautam ◽  
Avinash Kumar
Keyword(s):  
Risk Assessment ◽  
Atomic Power Station ◽  
Spatial Mapping ◽  
Power Station

Investigation of irradiated fuel elements from the first atomic power station

1964 ◽  
Vol 18 (2) ◽  
pp. 85-88
Author(s):  
A.P. Smirnov-Averin ◽  
V.I. Galkov ◽  
V.I. Ivanov ◽  
V.P. Meshcheryakov ◽  
I.G. Sheynker ◽  
...  
Keyword(s):  
Atomic Power Station ◽  
Power Station ◽  
Fuel Elements ◽  
Irradiated Fuel

scholarly journals On the Spectral and Polarimetric Signatures of a Bright Scatterer before and after Hardware Replacement

2021 ◽  
Vol 13 (5) ◽  
pp. 919
Author(s):  
Marco Gabella
Keyword(s):  
Low Noise ◽  
Low Noise Amplifiers ◽  
Doppler Velocity ◽  
Data Set ◽  
Differential Phase Shift ◽  
Spectral Signatures ◽  
Average Value ◽  
Before And After ◽  
Radar Calibration ◽  
Small Dispersion

A previous study has used the stable and peculiar echoes backscattered by a single “bright scatterer” (BS) during five winter days to characterize the hardware of C-band, the dual-polarization radar located at Monte Lema (1625 m altitude) in Southern Switzerland. The BS is the 90 m tall metallic tower on Cimetta (1633 m altitude, 18 km range). In this note, the statistics of the echoes from the BS were derived from other ten dry days with normal propagation conditions in winter 2015 and January 2019. The study confirms that spectral signatures, such as spectrum width, wideband noise and Doppler velocity, were persistently stable. Regarding the polarimetric signatures, the large values (with small dispersion) of the copolar correlation coefficient between horizontal and vertical polarization were also confirmed: the average value was 0.9961 (0.9982) in winter 2015 (January 2019); the daily standard deviations were very small, ranging from 0.0007 to 0.0030. The dispersion of the differential phase shift was also confirmed to be quite small: the daily standard deviation ranged from a minimum of 2.5° to a maximum of 5.3°. Radar reflectivities in both polarizations were typically around 80 dBz and were confirmed to be among the largest values observed in the surveillance volume of the Monte Lema radar. Finally, another recent 5-day data set from January 2020 was analyzed after the replacement of the radar calibration unit that includes low noise amplifiers: these five days show poorer characteristics of the polarimetric signatures and a few outliers affecting the spectral signatures. It was shown that the “historical” polarimetric and spectral signatures of a bright scatterer could represent a benchmark for an in-depth comparison after hardware replacements.

Gamma-spectrometric determination of106Ru,134Cs,137Cs and144Ce in the fuel from the Czechoslovak atomic power station A-1

1979 ◽  
Vol 51 (1) ◽  
pp. 153-160 ◽  
Author(s):  
V. Bulovič ◽  
J. Krtil ◽  
F. Sus ◽  
Z. Maksimovič ◽  
E. Klosová
Keyword(s):  
Atomic Power Station ◽  
Power Station

Rates of de novo Synthesis of Malate Synthase and Albumins during the Very Early Phase of Germination

1979 ◽  
Vol 34 (12) ◽  
pp. 1237-1242 ◽  
Author(s):  
Wolfram Köller ◽  
Helmut Kindl
Keyword(s):  
Early Phase ◽  
De Novo ◽  
Specific Activity ◽  
Specific Radioactivity ◽  
Malate Synthase ◽  
Polyacrylamide Gel ◽  
De Novo Synthesis ◽  
Albumin Fraction ◽  
Average Value ◽  
Large Pool

Abstract Malate synthase is synthesized de novo in the very early phase of germination. Its molecular and immunological properties do not differ from those of malate synthase from fully developed cotyledons. Radioactive leucine was administered to dry seeds of cucumber, and its incorporation into proteins of cotyledons was examined after 2 days of germination. The specific radioactivity of malate synthase, purified by immunoprecipitation and electrophoresis on polyacrylamide gel, was only 1/20 the average value of the total albumin fraction. The minimal incorporation documented by the comparatively low specific activity of isolated malate synthase is discussed in relation to the large pool of malate synthase already present in dry seeds.

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