Research Article Emergency Planning Zones Estimation for Karachi-2 and Karachi-3 Nuclear Power Plants using Gaussian Puff Model Sümer Fahin 1 and Muhammad Ali 2,3 1 Near East University, Faculty of Engineering, Turkish Republic of Northern Cyprus, Yakın Do˘ gu Bulvarı, PK:99138 Lefos ¸a/KKTC, Mersin 10, Turkey 2 ATILIM University, Faculty of Engineering, Department of Mechanical Engineering, 06836 ˙ Incek, G¨ olbas ¸ı, Ankara, Turkey 3 Directorate of Nuclear Power Engineering-Reactor (DNPER), Directorate of Nuclear Safety (DNS), P.O. Box 3140, Islamabad, Pakistan Correspondence should be addressed to S¨ umer S ¸ahin; sumer.sahin@neu.edu.tr Received 6 May 2016; Revised 25 June 2016; Accepted 5 July 2016 Academic Editor: Arkady Serikov Copyright © 2016 S. S ¸ahin and M. Ali. Tis is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Emergency planning zones (PAZ and UPZ) around the Karachi-2 and Karachi-3 nuclear power plants (K-2/K-3 NPPs) have been realistically determined by employing Gaussian puf model and Gaussian plume model together for atmospheric transport, difusion, and deposition of radioactive material using onsite and regional data related to meteorology, topography, and land- use along with latest IAEA Post-Fukushima Guidelines. Te analysis work has been carried out using U.S.NRC computer code RASCAL 4.2. Te assumed environmental radioactive releases provide the sound theoretical and practical bases for the estimation of emergency planning zones covering most expected scenario of severe accident and most recent multiunit Fukushima Accident. Sheltering could be used as protective action for longer period of about 04 days. Te area about 3 km of K-2/K-3 NPPs site should be evacuated and an iodine thyroid blocking agent should be taken before release up to about 14 km to prevent severe deterministic efects. Stochastic efects may be avoided or minimized by evacuating the area within about 8 km of the K-2/K-3 NPPs site. Protective actions may become more efective and cost benefcial by using current methodology as Gaussian puf model realistically represents atmospheric transport, dispersion, and disposition processes in contrast to straight-line Gaussian plume model explicitly in study area. Te estimated PAZ and UPZ were found 3 km and 8 km, respectively, around K-2/K-3 NPPs which are in well agreement with IAEA Post-Fukushima Study. Terefore, current study results could be used in the establishment of emergency planning zones around K-2/K-3 NPPs. 1. Introduction Emergency planning zones (EPZs) are established around nuclear power plants in order to implement prompt and efective protective actions and other response actions to protect the public during nuclear emergency situation at nuclear power plant(s). Te emergency situation arises due to damage of nuclear fuel present in nuclear reactor core or in spent fuel pool of nuclear power plants. Such emer- gency situations may have severe health efects (deterministic and stochastic) which afect public in diferent ways, for example, prompt causalities, reducing their life quality, and causing physiological and socioeconomic problems. Tese consequences can be prevented or mitigated by implementing protective actions promptly in the designated areas, that is, emergency planning zones. Te designated areas include precautionary action zone (PAZ) to reduce substantially the risk of severe deterministic efects and urgent protective action planning zone (UPZ) and to reduce substantially the risk of stochastic efects. Te importance of EPZs has been demonstrated in Fukushima Accident as protective actions; that is, evacuation of public within 20 km and sheltering within 20–30 km (later on advised to evacuate voluntarily) prevented radiological consequences efectively [1, 2]. Emergency planning zones are estimated considering spectrum of accidents, environmental releases of radioactive materials, meteorology, and radiological doses from difer- ent exposure pathways. Te consideration of spectrum of Hindawi Publishing Corporation Science and Technology of Nuclear Installations Volume 2016, Article ID 8549498, 8 pages http://dx.doi.org/10.1155/2016/8549498