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Published: 2015-03-30
Abstract Views: 72
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DOI: https://doi.org/10.53747/jnst.v5i1.178
Issue
Vol. 5 No. 1 (2015)
Section
Articles
How to Cite
Nguyen , T. K., Le , D. C., Do , X. A., Duong , D. T., Trinh , V. G., Nguyen Thi , T. H., Nguyen , Q. L., Nguyen , H. Q., Nguyen , N. G., Le Thi , H. H., & Nguyen , T. P. (2015). Assessment of radioactive gaseous effluent released from Ninh Thuan 1 nuclear power plant under scenario of INES-level 6 nuclear accident. Nuclear Science and Technology, 5(1), 1-7. https://doi.org/10.53747/jnst.v5i1.178

Assessment of radioactive gaseous effluent released from Ninh Thuan 1 nuclear power plant under scenario of INES-level 6 nuclear accident

Nguyen Tuan Khai1, Le Dinh Cuong1, Do Xuan Anh1, Duong Duc Thang1, Trinh Van Giap1, Nguyen Thi Thu Ha1, Nguyen Quang Long1, Nguyen Hao Quang2, Nguyen Nam Giang3, Le Thi Hong Hiep4, Nguyen The Phung5
1 Institute for Nuclear Science and Technology (INST), 179 Hoang Quoc Viet, Hanoi
2 Vietnam Atomic Energy Institute (VINATOM), 59 Ly ThuongKiet, Hanoi
3 Vietnam Agency for Radiation and Nuclear Safety (VARANS), 113 Tran Duy Hung, Hanoi
4 The University of Fire Fighting & Prevention (UFFP), 243 Khuat Duy Tien, Hanoi
5 School of nuclear Engineering and Environmental Physics, Hanoi University of science and Technology

Main Article Content

Abstract

Based on guides RG 1.109, RG 1.111 published by United States Nuclear Regulatory Commission (USNRC) our research concentrates on assessing radiation doses caused by radioactive substances released from the Ninh Thuan 1 nuclear power plant (NPP) to the environment under scenario of an INES-level 6 nuclear accident caused by the Station Black Out (SBO) incident and the loss of coolant accident (LOCA) phenomenon using software RASCAL4.3 provided by the Emergency Operations Center of USNRC. The NinhThuan 1 plant is assumed to use the VVER-1200 technology with a total power of 2400 MWe. The input data for the model calculations is based on building the accident scenario, the technical parameters of VVER-1200 technology and the meteorology. In this work the meteorological data on dry and rainy seasons which are typical for the NinhThuan region was considered. The maximum dose values were calculated within an area of 40 km radius from the NPP site. The obtained calculation results showed that the dose distributions affected by meteorological conditions. In the rainy season the dose values near the plant are higher than those in the dry season, especially at the distances less than 10 kilometers from the plant the total effective dose equivalence (TEDE) values can be from about 3.5 to 15 times higher than the dose limit for publics. As a result, it is requested to follow the evolution of the accident in order to issue timely the appropriate response measures based on the guidance specified by the Circular 25/2014/TT-BKHCN.

Article Details

Keywords

Loss of Coolant Accident (LOCA), Station Black Out (SBO), source term, radioactive release, maximum dose value, Ninh Thuan 1 nuclear power plant (NPP), VVER-1200, International Nuclear Event Scale (INES), RASCAL4.3

References

[1] Regulatory Guide 1.109 – Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10 CFR Part 50, Appendix I; U.S. Nuclear Regulatory Commission, 1977.
[2] INES, The international Nuclear and Radiological Event Scale, User’s Manual, 2008 Edition, IAEA.
[3] RASCAL42 – Workbook, August 2012
[4] J. F. Sagendorf, J. T. Goll, and W. F. Sandusky, XOQDOQ: Computer Program for the Meteorological Evaluation of Routine Releases at Nuclear Power Stations; NUREG/CR-2919; U.S. Nuclear Regulatory Commission; Washington, D.C; 1982.
[5] Status report 108-VVER-1200 (V-491).
[6] Jozef Misak, Generic Source Term and the Radiological Consequences of Severe Accidents, Safety Assessment Advisory Programme, Malaysia, 9-13, Dec. 2012.
[7] Subpart D-Radiation Dose Limits for Individual Members of the Public; Part 20-Standards for protection against radiation;NRC Regulations (10 CFR).
[8] Circular No. 19/2012/TT-BKHCN issued on 08/Nov./2012 by the Vietnam Ministry of Science and Technology (MOST) on controlling and ensuring the radiation safety for professional and public exposure.
[9] Circular No. 25/2014/TT-BKHCN issued on 08/Oct./2014 by the Vietnam Ministry of Science and Technology (MOST) on preparing and planning the emergency preparedness for radiation and nuclear accidents.