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Featured researches published by A. C. Patra.


Radiation Protection Dosimetry | 2013

Age-dependent dose and health risk due to intake of uranium in drinking water from Jaduguda, India

A. C. Patra; S. Mohapatra; S. K. Sahoo; P. Lenka; J. S. Dubey; R. M. Tripathi; V. D. Puranik

Uranium is a heavy metal that is not only radiologically harmful but also a well-known nephrotoxic element. In this study, occurrence of uranium in drinking water samples from locations near the uranium mining site at Jaduguda, India, was studied by Laser-induced fluorimetry. Uranium concentrations range from 0.03 ± 0.01 to 11.6 ± 1.3 µg l(-l), being well within the US Environmental Protection Agency drinking water limit of 30 μg l(-1). The ingestion dose due to the presence of uranium in drinking water for various age groups varies from 0.03 to 28.3 μSv y(-1). The excess lifetime cancer risk varies from 4.3×10(-8) to 1.7×10(-5) with an average value of 4.8×10(-6), much less than the acceptable excess lifetime cancer risk of 10(-3) for radiological risk. The chemical risk (hazard quotient) has an average value of 0.15 indicating that the water is safe for drinking.


Radiation Protection Dosimetry | 2013

Ingestion dose from 238U, 232Th, 226Ra, 40K and 137Cs in cereals, pulses and drinking water to adult population in a high background radiation area, Odisha, India

P. Lenka; S. K. Sahoo; S. Mohapatra; A. C. Patra; J. S. Dubey; D. Vidyasagar; R. M. Tripathi; V. D. Puranik

A natural high background radiation area is located in Chhatrapur, Odisha in the eastern part of India. The inhabitants of this area are exposed to external radiation levels higher than the global average background values, due to the presence of uranium, thorium and its decay products in the monazite sands bearing placer deposits in its beaches. The concentrations of (232)Th, (238)U, (226)Ra, (40)K and (137)Cs were determined in cereals (rice and wheat), pulses and drinking water consumed by the population residing around this region and the corresponding annual ingestion dose was calculated. The annual ingestion doses from cereals, pulses and drinking water varied in the range of 109.4-936.8, 10.2-307.5 and 0.5-2.8 µSv y(-1), respectively. The estimated total annual average effective dose due to the ingestion of these radionuclides in cereals, pulses and drinking water was 530 µSv y(-1). The ingestion dose from cereals was the highest mainly due to a high consumption rate. The highest contribution of dose was found to be from (226)Ra for cereals and drinking water and (40)K was the major dose contributor from the intake of pulses. The contribution of man-made radionuclide (137)Cs to the total dose was found to be minimum. (226)Ra was found to be the largest contributor to ingestion dose from all sources.


Radiation Protection Dosimetry | 2013

Distribution of norm and 137Cs in soils of the Visakhapatnam region, Eastern India, and associated radiation dose

S. Mohapatra; S. K. Sahoo; A. Vinod Kumar; A. C. Patra; P. Lenka; J. S. Dubey; V. K. Thakur; R. M. Tripathi; V. D. Puranik

The specific activity of naturally occurring radioactive materials and (137)Cs in surface soils around the new Bhabha Atomic Research Centre site at Visakhapatnam region, Eastern India, has been determined using high-resolution gamma-ray spectrometry as part of a baseline radiological survey. Radiation hazard for the samples was assessed by radium equivalent activity (Raeq) and absorbed gamma dose rate (D). The mean absorbed gamma dose rate was found to be 104.9 nGy h(-1). The average annual effective dose equivalent was found to be 0.13 mSv y(-1).


Journal of Radioanalytical and Nuclear Chemistry | 2015

Applying INAA to assess dietary intake of elements through fish from coastal areas near Vishakhapatnam, India

A. C. Patra; S. Mohapatra; Amit Kumar; P. M. Ravi; R. M. Tripathi

Essential and toxic element concentrations were measured in fish from coastal areas of Pudimadaka near Vishakhapatnam by neutron activation analysis. Elemental concentrations were observed to be within guideline values fit for human consumption. Correlation among elements suggests similar biogeochemical properties and possibly similar sources. The daily dietary intake values were comparable with reported literature from India and ICRP reference man. Hazard Quotients for all elements were <1. These data will serve as baseline values of elemental concentrations that can be compared with future elemental levels during the operational and post-operational stages of the nuclear facility to be set up at this location. They can also be useful for further studies to identify the spatial and seasonal variations of elements in fish species and monitor the concentration level of elements in this region.


Environmental Monitoring and Assessment | 2013

Distribution of radionuclides in surface soils, Singhbhum Shear Zone, India and associated dose

A. C. Patra; S. K. Sahoo; R. M. Tripathi; V. D. Puranik


Journal of Radioanalytical and Nuclear Chemistry | 2014

On the radiological assessment of natural and fallout radioactivity in a natural high background radiation area at Odisha, India

S. Mohapatra; S. K. Sahoo; J. S. Dubey; A. C. Patra; V. K. Thakur; S. K. Tripathy; D. Vidyasagar; S.V. Godbole; P. M. Ravi; R. M. Tripathi


Archive | 2011

Proposed visible emission line space solar coronagraph

Jagdev Singh; Raghavendra B Prasad; P. Venkatakrishnan; K. Sankarasubramanian; Dipankar Banerjee; Raja Bayanna; Shibu K. Mathew; Jayant Murthy; Prasad Subramaniam; R. Ramesh; S. Kathiravan; S. Nagabhushana; P. K. Mahesh; P. K. Manoharan; Wahab Uddin; S. Sriram; Amit Kumar; Nandita Srivastava; Koteswara Rao; Cl Nagendra; P Chakraborthy; K. Sriram; R. Venkateswaran; T. N. Krishnamurthy; P Sreekumar; Ks Sarma; Raghava Murthy; Kh Navalgund; Drm Samudraiah; Narayan P Babu


Journal of Radioanalytical and Nuclear Chemistry | 2013

Natural radioactivity in surface marine sediments near the shore of Vizag, South East India and associated radiological risk

R. M. Tripathi; A. C. Patra; S. Mohapatra; S. K. Sahoo; Amit Kumar; V. D. Puranik


Journal of Radioanalytical and Nuclear Chemistry | 2015

Characterization of uranium and its progenies in drinking water and assessment of dose to public around a NHBRA, Odisha, India

S. Mohapatra; S. K. Sahoo; J. S. Dubey; A. C. Patra; V. K. Thakur; S. K. Tripathy; D. V. Sagar; S.V. Godbole; P. M. Ravi; R. M. Tripathi


Current Science | 2017

Visible Emission Line Coronagraph on Aditya-L1

B. Raghavendra Prasad; Dipankar Banerjee; Jagdev Singh; S. Nagabhushana; Amit Kumar; P. U. Kamath; S. Kathiravan; Suresh Venkata; N. Rajkumar; Vishwanath Natarajan; Madhur Juneja; Pawan Somu; Vaibhav Pant; Nigar Shaji; K. Sankarsubramanian; A. C. Patra; R. Venkateswaran; Abhijit Avinash Adoni; S. Narendra; T. R. Haridas; Shibu K. Mathew; R. Mohan Krishna; K. Amareswari; Bhavesh Jaiswal

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R. M. Tripathi

Bhabha Atomic Research Centre

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S. K. Sahoo

Bhabha Atomic Research Centre

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S. Mohapatra

Bhabha Atomic Research Centre

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J. S. Dubey

Bhabha Atomic Research Centre

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V. D. Puranik

Bhabha Atomic Research Centre

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P. M. Ravi

Bhabha Atomic Research Centre

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P. Lenka

Bhabha Atomic Research Centre

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S. K. Tripathy

Bhabha Atomic Research Centre

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V. K. Thakur

Bhabha Atomic Research Centre

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Amit Kumar

Indian Institutes of Technology

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