Strategy evaluation for fire spray system on Advanced Passive PWR Severe Accident Management Guideline |
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Affiliation: | 1. Department of Physics, Air University, PAF Complex, E-9, Islamabad 44000, Pakistan;2. Department of Nuclear Engineering, Pakistan Institute of Engineering & Applied Sciences (PIEAS), Post Office Nilore, Islamabad 45650, Pakistan;3. Department of Physics & Applied Mathematics, Pakistan Institute of Engineering & Applied Sciences (PIEAS), Post Office Nilore, Islamabad 45650, Pakistan;1. Lithuanian Energy Institute, Nuclear Engineering Laboratory, 3 Breslaujos St., Kaunas LT-44403, Lithuania;2. Kaunas University of Technology, Department of Thermal and Nuclear Energy, 56 – 438 Studentu St., Kaunas LT-51424, Lithuania;1. Nuclear Science and Technology Research Institute, Tehran 14399-51113, Iran;2. Department of Energy Engineering, Sharif University of Technology, Tehran 8639-11365, Iran;3. Faculty of Engineering, Science and Research Branch, Islamic Azad University of Tehran, Tehran, Iran;1. Department of Nuclear Energy Science and Engineering, Naval University of Engineering, Wuhan 430033, China;2. Institute of Thermal Science and Power Engineering, Naval University of Engineering, Wuhan 430033, China |
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Abstract: | The fire spray system (FSS) of the Advanced Passive PWR, as a part of the fire protection system, can provide a non-safety related containment spraying function for severe accident mitigation which is included in the Severe Accident Management Guidelines (SAMG) of the Advanced Passive PWR when dealing with severe accidents. The effectiveness of the FSS is investigated on three effects for severe accident mitigation which are controlling the containment condition, washing out fission product and injecting into the containment through three representative severe accident scenarios analysis with integral accident analysis code since there is no sufficient data support, besides the negative impact is also discussed. Results show that the FSS can be effective for controlling the containment condition, washing out fission product and injecting into the containment, however the effect is limited due to system limitation: the FSS can only cool the containment atmosphere for a short term; the flow rate of FSS cannot fulfill the success criteria given in the PRA report of the Advanced Passive PWR. Meanwhile, the hydrogen concentration and the containment water level should be the long-term monitored because actuating the FSS may cause hydrogen risk in the containment and containment flooding. Despite its limitation and negative impact, the FSS can be effective as an alternative severe accident mitigation measurement for postponing the process of accidents for safety system recovery. |
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Keywords: | Fire spray system Severe accident mitigation Severe Accident Management Guideline ACC" },{" #name" :" keyword" ," $" :{" id" :" kwrd0030" }," $$" :[{" #name" :" text" ," _" :" Accumulator ADS" },{" #name" :" keyword" ," $" :{" id" :" kwrd0040" }," $$" :[{" #name" :" text" ," _" :" Automatic Depressurization System CA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0050" }," $$" :[{" #name" :" text" ," _" :" Computational Aid CMT" },{" #name" :" keyword" ," $" :{" id" :" kwrd0060" }," $$" :[{" #name" :" text" ," _" :" Core Makeup Tank CSE" },{" #name" :" keyword" ," $" :{" id" :" kwrd0070" }," $$" :[{" #name" :" text" ," _" :" Containment Systems Experiment CSS" },{" #name" :" keyword" ," $" :{" id" :" kwrd0080" }," $$" :[{" #name" :" text" ," _" :" Containment Spray System DCD" },{" #name" :" keyword" ," $" :{" id" :" kwrd0090" }," $$" :[{" #name" :" text" ," _" :" Design control document DVI" },{" #name" :" keyword" ," $" :{" id" :" kwrd0100" }," $$" :[{" #name" :" text" ," _" :" Direct Vessel Injection EOP" },{" #name" :" keyword" ," $" :{" id" :" kwrd0110" }," $$" :[{" #name" :" text" ," _" :" Emergency Operating Procedures FPS" },{" #name" :" keyword" ," $" :{" id" :" kwrd0120" }," $$" :[{" #name" :" text" ," _" :" Fire Protection System FSS" },{" #name" :" keyword" ," $" :{" id" :" kwrd0130" }," $$" :[{" #name" :" text" ," _" :" Fire Spray System IRWST" },{" #name" :" keyword" ," $" :{" id" :" kwrd0140" }," $$" :[{" #name" :" text" ," _" :" In-containment Refueling Water Tank LOCA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0150" }," $$" :[{" #name" :" text" ," _" :" Loss Of Coolant Accident PCCS" },{" #name" :" keyword" ," $" :{" id" :" kwrd0160" }," $$" :[{" #name" :" text" ," _" :" Passive Containment Cooling System PRA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0170" }," $$" :[{" #name" :" text" ," _" :" Probabilistic Risk Assessment PRZ" },{" #name" :" keyword" ," $" :{" id" :" kwrd0180" }," $$" :[{" #name" :" text" ," _" :" Pressurizer PRHR HX" },{" #name" :" keyword" ," $" :{" id" :" kwrd0190" }," $$" :[{" #name" :" text" ," _" :" Passive Residual Heat Removal Heat Exchanger PWR" },{" #name" :" keyword" ," $" :{" id" :" kwrd0200" }," $$" :[{" #name" :" text" ," _" :" Pressure Water Reactor RPV" },{" #name" :" keyword" ," $" :{" id" :" kwrd0210" }," $$" :[{" #name" :" text" ," _" :" Reactor Pressure Vessel SAMG" },{" #name" :" keyword" ," $" :{" id" :" kwrd0220" }," $$" :[{" #name" :" text" ," _" :" Severe Accident Management Guideline SG" },{" #name" :" keyword" ," $" :{" id" :" kwrd0230" }," $$" :[{" #name" :" text" ," _" :" Steam Generator |
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