Description
The idea is to produce ZERO defective products.
Location Strategy and PokaYoke in Nuclear Power Plant
BY Chetanya Rajput A27
Major concern faced by designers of Nuclear Power Plant
? Seismic risks that can have major consequence on
human life and environment ? Opposition by public on siting such plants near their communities.
Major concern of a nuclear power plant
? Performance of that facility during an emergency
when undesirable effects are felt at its worst. ? The location should be away from the population centers due to actual or perceived risks.
Factors involved while formulating a location strategy
? Facility
? Feasibility
? Logistics ? Community and Site ? Political Risk ? Governmental Regulation ? Environmental Regulation.
Poka Yoke
? First adopted in the Toyota Production System.
? A mechanism that helps an equipment operator
avoid mistake as it also known as fail-safing ? Eliminates product defects by preventing, correcting, or drawing attention to human errors as they occur. ? The idea is to produce ZERO defective products.
Chernobyl Power Plant (Design Flaws)
? The reactor was unsafe at low power levels.
? The roof was made of Bitumen which is ignitable.
? Inadequate mechanism for steam, graphite and
oxygen driven hydrogen explosion. ? The water boxes could not sustain high pressure failure of the pipes.
Fukushima Daiichi Power Plant (Design Flaws)
? The plant was designed for 8 mtrs. of Tsunami, while
the tsunami was 14 mtrs. high. ? Insufficient battery power in units 1 and 3 which drove the cooling pumps. ? Since systems were inadequate, an evacuation had to be ordered. ? Insufficient Fire safety mechanism.
Human Errors
? At Three Mile Island(another major disaster),
operators refused to believe a dial that told them the reactor was boiling dry, preferring to trust another dial that was giving a different (and incorrect) interpretation. One solution to this is proper training, greater vigilance and creative thinking about what might go wrong.
Safety measures in Nuclear Power Plants
? Generators should be located at a minimum height. ? Emergency water reservoir should be in place. ? Passive safety methods should be installed requiring
no signal inputs, no external power sources, no moving mechanical parts. ? Helium or liquid sodium are better alternatives to water. These can be used as coolant. ? Fast breeder reactors should be immersed into the pool of liquid metal. ? Walkaway safe - Even if all power is lost and the coolant leaks and the operators flee the scene, there will be no meltdown of the core, no fire in the spent fuel rods, and no bursts of radioactive steam into the
Daily Life Applications
THANKYOU
doc_319479941.pptx
The idea is to produce ZERO defective products.
Location Strategy and PokaYoke in Nuclear Power Plant
BY Chetanya Rajput A27
Major concern faced by designers of Nuclear Power Plant
? Seismic risks that can have major consequence on
human life and environment ? Opposition by public on siting such plants near their communities.
Major concern of a nuclear power plant
? Performance of that facility during an emergency
when undesirable effects are felt at its worst. ? The location should be away from the population centers due to actual or perceived risks.
Factors involved while formulating a location strategy
? Facility
? Feasibility
? Logistics ? Community and Site ? Political Risk ? Governmental Regulation ? Environmental Regulation.
Poka Yoke
? First adopted in the Toyota Production System.
? A mechanism that helps an equipment operator
avoid mistake as it also known as fail-safing ? Eliminates product defects by preventing, correcting, or drawing attention to human errors as they occur. ? The idea is to produce ZERO defective products.
Chernobyl Power Plant (Design Flaws)
? The reactor was unsafe at low power levels.
? The roof was made of Bitumen which is ignitable.
? Inadequate mechanism for steam, graphite and
oxygen driven hydrogen explosion. ? The water boxes could not sustain high pressure failure of the pipes.
Fukushima Daiichi Power Plant (Design Flaws)
? The plant was designed for 8 mtrs. of Tsunami, while
the tsunami was 14 mtrs. high. ? Insufficient battery power in units 1 and 3 which drove the cooling pumps. ? Since systems were inadequate, an evacuation had to be ordered. ? Insufficient Fire safety mechanism.
Human Errors
? At Three Mile Island(another major disaster),
operators refused to believe a dial that told them the reactor was boiling dry, preferring to trust another dial that was giving a different (and incorrect) interpretation. One solution to this is proper training, greater vigilance and creative thinking about what might go wrong.
Safety measures in Nuclear Power Plants
? Generators should be located at a minimum height. ? Emergency water reservoir should be in place. ? Passive safety methods should be installed requiring
no signal inputs, no external power sources, no moving mechanical parts. ? Helium or liquid sodium are better alternatives to water. These can be used as coolant. ? Fast breeder reactors should be immersed into the pool of liquid metal. ? Walkaway safe - Even if all power is lost and the coolant leaks and the operators flee the scene, there will be no meltdown of the core, no fire in the spent fuel rods, and no bursts of radioactive steam into the
Daily Life Applications
THANKYOU
doc_319479941.pptx