- #1
xholicwriter
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Hi everyone,
I was reading the report about the Fukushima incident and I do not understand some concepts because of my limited understanding. Could you please help me?
Combustible Gas Control. <----- can you explain this concept in simpler language
The NRC regulations in 10 CFR 50.44, “Combustible Gas Control for Nuclear Power Reactors,” require reactors either to operate with their containment atmosphere inerted, resulting in the lack of oxygen to support combustion, or to have the capability for controlling combustible gas generated from a metal-water reaction involving approximately three-quarters of the fuel cladding so that there is no impact on the containment structural integrity. RG 1.7, “Control of Combustible Gas Concentrations In Containment,” provides further guidance on regulatory expectations for combustible gas control. pg 42
What happened fukushima
Information available at the time of this report indicates that, during the days following the Fukushima prolonged SBO event, Units 1, 3, and 4 experienced explosions, causing significant damage to the reactor buildings for those units. It is believed that the explosions in Units 1 and 3 resulted from hydrogen gas that was liberated inside the drywell during high-temperature zirconium fuel cladding reactions with water and that hydrogen gas migrated to the reactor building. The migration route of the hydrogen gas from the primary containment to reactor building has not yet been determined definitively; however, the failure to prevent, through containment venting, the primary containment pressure from significantly exceeding the design pressure likely contributed to the transport of hydrogen gas. It is believed that the explosion in the Unit 4 reactor building also resulted from hydrogen gas, but the source of the gas in Unit 4 is not yet clear. Unit 2 may also have experienced a hydrogen explosion in its suppression pool inside containment. However, the mechanism for suppression pool failure remains unclear. pg. 42
2. Containment Overpressure Protection pg.39 <----- could you explain this in simpler language?
can you explain what happened at fukushima pg. 40
3. Spent Fuel Pool Safety pg 43. <------ could you explain this in simpler language?
Can you explain what happened at fukushima pg. 45
http://www.nrc.gov/reactors/operating/ops-experience/japan-info.html
Thank you very much,
xholic
I was reading the report about the Fukushima incident and I do not understand some concepts because of my limited understanding. Could you please help me?
Combustible Gas Control. <----- can you explain this concept in simpler language
The NRC regulations in 10 CFR 50.44, “Combustible Gas Control for Nuclear Power Reactors,” require reactors either to operate with their containment atmosphere inerted, resulting in the lack of oxygen to support combustion, or to have the capability for controlling combustible gas generated from a metal-water reaction involving approximately three-quarters of the fuel cladding so that there is no impact on the containment structural integrity. RG 1.7, “Control of Combustible Gas Concentrations In Containment,” provides further guidance on regulatory expectations for combustible gas control. pg 42
What happened fukushima
Information available at the time of this report indicates that, during the days following the Fukushima prolonged SBO event, Units 1, 3, and 4 experienced explosions, causing significant damage to the reactor buildings for those units. It is believed that the explosions in Units 1 and 3 resulted from hydrogen gas that was liberated inside the drywell during high-temperature zirconium fuel cladding reactions with water and that hydrogen gas migrated to the reactor building. The migration route of the hydrogen gas from the primary containment to reactor building has not yet been determined definitively; however, the failure to prevent, through containment venting, the primary containment pressure from significantly exceeding the design pressure likely contributed to the transport of hydrogen gas. It is believed that the explosion in the Unit 4 reactor building also resulted from hydrogen gas, but the source of the gas in Unit 4 is not yet clear. Unit 2 may also have experienced a hydrogen explosion in its suppression pool inside containment. However, the mechanism for suppression pool failure remains unclear. pg. 42
2. Containment Overpressure Protection pg.39 <----- could you explain this in simpler language?
can you explain what happened at fukushima pg. 40
3. Spent Fuel Pool Safety pg 43. <------ could you explain this in simpler language?
Can you explain what happened at fukushima pg. 45
http://www.nrc.gov/reactors/operating/ops-experience/japan-info.html
Thank you very much,
xholic