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Chitra N, Chandrasekaran S, Venkata Srinivas C, Athmalingam S, Venkatraman B. Track detector based discriminative thoron measurement – An optimization study through experiments and modelling. Radiat Phys Chem Oxf Engl 1993 2023. [DOI: 10.1016/j.radphyschem.2022.110755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Karmakar S, Srinivas CV, Rakesh PT, Gopalakrishnan V, Chandrasekaran S, Athmalingam S, Venkatraman B. Development of a numerical model for sector-average plume gamma dose and its validation with dose rate measurements at Kalpakkam NPP site, India. J Environ Radioact 2022; 255:107029. [PMID: 36265399 DOI: 10.1016/j.jenvrad.2022.107029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 09/15/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
A Gaussian Plume based simple numerical model, named DIFFUSE is developed to simulate the long-term sector-average plume gamma dose due to radioactive plume released during normal operation of nuclear facilities. DIFFUSE calculates site specific joint frequency distributions of wind speed, wind direction and atmospheric stability using micrometeorological observations. It performs the finite sector-average dose integration for any stack height and gamma energy using Simpson's 1/3rd method with sufficient computational efficiency within the site boundary up to 2 km. Plume dose contribution to the main plume sector from nearest and next nearest side plume sectors is also calculated. DIFFUSE is validated with a 3-month long, starting from February 2021 to April 2021, dose rate observation data during operational releases from 100 m stack of Madras Atomic Power Station, Kalpakkam, India. Meteorological data from onsite 50 m tower and continuous dose rate observation from two sets of Autonomous Gamma Dose Logger (AGDL) detectors, namely n-AGDLs and r-AGDLs, placed in two different configurations along the geometric arcs of wind sectors around the stack are used. Simulated doses are compared with look-up table based dose estimates by Hukkoo et al. (1988). Linear spatial averaging of cumulative AGDL doses on a sector arc is used as measured sector-average dose for model validation. Simulations performed for both n-AGDL and r-AGDL configurations show DIFFUSE estimated doses are ∼37% lower and Hukkoo estimated doses are at least ∼50% lower than the measured doses. Statistical analysis of DIFFUSE simulated doses shows a statistical correlation of R2∼98.3%, slope of the fit ∼1.36 for n-AGDL setup and R2∼75.3%, slope of the fit ∼1.57 for r-AGDL setup. Overall, DIFFUSE produces conservative doses compared to look-up table based doses as required by regulatory bodies.
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Affiliation(s)
- Shanu Karmakar
- Environmental Assessment Division, Safety Quality & Resource Management Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India.
| | - C V Srinivas
- Environmental Assessment Division, Safety Quality & Resource Management Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India
| | - P T Rakesh
- Environmental Assessment Division, Safety Quality & Resource Management Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India
| | - V Gopalakrishnan
- Environmental Assessment Division, Safety Quality & Resource Management Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India
| | - S Chandrasekaran
- Environmental Assessment Division, Safety Quality & Resource Management Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India
| | - S Athmalingam
- Environmental Assessment Division, Safety Quality & Resource Management Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India
| | - B Venkatraman
- Environmental Assessment Division, Safety Quality & Resource Management Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India
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Kumar MC, Sudha AJ, Subramanian V, Athmalingam S, Venkatraman B. Effect of Internal Decay Power and Surface Cooling on Nuclear Fuel Droplet Solidification during MFCI in a SFR – A Numerical Study. NUCL SCI ENG 2022. [DOI: 10.1080/00295639.2022.2103338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- M. Chandra Kumar
- Indira Gandhi Centre for Atomic Research, Constituent Institution of Homi Bhabha National Institute, Kalpakkam 603102, India
| | - A. Jasmin Sudha
- Indira Gandhi Centre for Atomic Research, Constituent Institution of Homi Bhabha National Institute, Kalpakkam 603102, India
- Indira Gandhi Centre for Atomic Research, Safety, Quality and Resource Management Group, Kalpakkam 603102, India
| | - V. Subramanian
- Indira Gandhi Centre for Atomic Research, Safety, Quality and Resource Management Group, Kalpakkam 603102, India
| | - S. Athmalingam
- Indira Gandhi Centre for Atomic Research, Safety, Quality and Resource Management Group, Kalpakkam 603102, India
| | - B. Venkatraman
- Indira Gandhi Centre for Atomic Research, Safety, Quality and Resource Management Group, Kalpakkam 603102, India
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Avinash C, Singh K, Rao EH, Malarvizhi B, Das SK, Kumar RS, Lydia G, Ponraju D, Nashine B, Athmalingam S, Venkatraman B. Out-of-pile experiments for design validation of material irradiation test loop. ANN NUCL ENERGY 2022. [DOI: 10.1016/j.anucene.2021.108925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Chitra N, Chandrasekaran S, Srinivas CV, Athmalingam S, Venkatraman B. Determination of soil porosity by a simple and novel technique of fusing thoron diffusion experiment and modeling. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08312-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hemanth Rao E, Shukla PK, Venkat Reddy G, Murthy S, Kumaresan M, Das SK, Lydia G, Ponraju D, Athmalingam S, Venkatraman B. Generation of simulated corium using thermite process. ANN NUCL ENERGY 2021. [DOI: 10.1016/j.anucene.2021.108558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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John Arul A, Senthil Kumar C, Athmalingam S, Singh OP, Suryaprakasa Rao K. Reliability analysis of safety grade decay heat removal system of Indian prototype fast breeder reactor. ANN NUCL ENERGY 2006. [DOI: 10.1016/j.anucene.2005.08.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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