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Title: Effect of spray parameter on containment depressurization during LOCA in KAPP 3 and 4, 700 MWE IPHWR

Abstract

KAPP 3 and 4 is an Indian Pressurized Heavy Water Reactor (IPHWR) of 700 MWe capacities. It is a pressure tube type reactor with heavy water as moderator and coolant and natural Uranium Dioxide as fuel. It consists of 392 horizontal fuel channel assemblies and surrounded by three separate water systems i.e. primary coolant, moderator and calandria vault water system. Containment of Indian PHWR is an ultimate barrier, which is designed to envelope whole reactor systems, to prevent the spread of active air-borne fission products in accident condition. Containment Spray System has been provided for energy as well as activity removal from the Containment system. This paper discusses about the studies done to assess the effect of spray parameters such as spray flow rate, droplets diameter and height of fall on containment peak pressure and temperature, long term containment depressurization and energy removal from the containment during Loss of Coolant Accident (LOCA). The spray flow rate and droplets diameter play an important role in removing residual energy from containment atmosphere, which influences depressurization of containment. It is obvious that faster depressurization of containment during postulated LOCA helps in limiting radiological consequences. From radiological considerations, droplets diameter is required to bemore » kept to the lowest practically possible value and flow rate of spray should be high. Spray water droplets fall height governs the exposure time of droplets, which is the direct indication of energy removal rate. However, it is observed from the sensitivity studies that for a height of spray droplet fall more than 16.5 m, for the range of spray water flow rate and droplets sizes considered in the analyses, there is no significant change in heat removal. (authors)« less

Authors:
; ; ; ;  [1]
  1. Directorate of Reactor Safety and Analysis, Nuclear Power Corporation of India Limited, C-3,Nabhikiya Urja Bhavan, Anushaktinagar,, Mumbai 400094 (India)
Publication Date:
Research Org.:
American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
OSTI Identifier:
22106060
Resource Type:
Conference
Resource Relation:
Conference: ICAPP '12: 2012 International Congress on Advances in Nuclear Power Plants, Chicago, IL (United States), 24-28 Jun 2012; Other Information: Country of input: France; 12 refs.; Related Information: In: Proceedings of the 2012 International Congress on Advances in Nuclear Power Plants - ICAPP '12| 2799 p.
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; AFTER-HEAT REMOVAL; CONTAINMENT SPRAY SYSTEMS; COOLANTS; DEPRESSURIZATION; DROPLETS; FISSION PRODUCTS; FLOW RATE; INDIA; LOSS OF COOLANT; MODERATORS; NATURAL URANIUM; PHWR TYPE REACTORS; PRESSURE TUBES; PRIMARY COOLANT CIRCUITS; SENSITIVITY ANALYSIS; URANIUM DIOXIDE

Citation Formats

Sharma, S. K., Bhartia, D. K., Mohan, N., Malhotra, P. K., and Ghadge, S. G. Effect of spray parameter on containment depressurization during LOCA in KAPP 3 and 4, 700 MWE IPHWR. United States: N. p., 2012. Web.
Sharma, S. K., Bhartia, D. K., Mohan, N., Malhotra, P. K., & Ghadge, S. G. Effect of spray parameter on containment depressurization during LOCA in KAPP 3 and 4, 700 MWE IPHWR. United States.
Sharma, S. K., Bhartia, D. K., Mohan, N., Malhotra, P. K., and Ghadge, S. G. Sun . "Effect of spray parameter on containment depressurization during LOCA in KAPP 3 and 4, 700 MWE IPHWR". United States.
@article{osti_22106060,
title = {Effect of spray parameter on containment depressurization during LOCA in KAPP 3 and 4, 700 MWE IPHWR},
author = {Sharma, S. K. and Bhartia, D. K. and Mohan, N. and Malhotra, P. K. and Ghadge, S. G.},
abstractNote = {KAPP 3 and 4 is an Indian Pressurized Heavy Water Reactor (IPHWR) of 700 MWe capacities. It is a pressure tube type reactor with heavy water as moderator and coolant and natural Uranium Dioxide as fuel. It consists of 392 horizontal fuel channel assemblies and surrounded by three separate water systems i.e. primary coolant, moderator and calandria vault water system. Containment of Indian PHWR is an ultimate barrier, which is designed to envelope whole reactor systems, to prevent the spread of active air-borne fission products in accident condition. Containment Spray System has been provided for energy as well as activity removal from the Containment system. This paper discusses about the studies done to assess the effect of spray parameters such as spray flow rate, droplets diameter and height of fall on containment peak pressure and temperature, long term containment depressurization and energy removal from the containment during Loss of Coolant Accident (LOCA). The spray flow rate and droplets diameter play an important role in removing residual energy from containment atmosphere, which influences depressurization of containment. It is obvious that faster depressurization of containment during postulated LOCA helps in limiting radiological consequences. From radiological considerations, droplets diameter is required to be kept to the lowest practically possible value and flow rate of spray should be high. Spray water droplets fall height governs the exposure time of droplets, which is the direct indication of energy removal rate. However, it is observed from the sensitivity studies that for a height of spray droplet fall more than 16.5 m, for the range of spray water flow rate and droplets sizes considered in the analyses, there is no significant change in heat removal. (authors)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {7}
}

Conference:
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