xmlns:fb="https://www.facebook.com/2008/fbml"> Voice Of Myanmar: Fukushima ႏွင့္ Chernobyl ႏိႈင္းယွဥ္ခ်က္

Thursday, April 21, 2011

Fukushima ႏွင့္ Chernobyl ႏိႈင္းယွဥ္ခ်က္


မတ္လ ၁၁ ရက္ေန႕ကဂ်ပန္ႏိုင္ငံတြင္ ျဖစ္ပြားခဲ့ေသာ အင္အားျပင္းငလ်င္ႏွင့္ ေနာက္ဆက္တြဲ ဆူနာမီေရလိႈင္း မ်ားေၾကာင့္ ဖူကူရွီးမားေဒသရွိ ႏ်ဴကလီးယားဓါတ္အားေပးစက္ရံု ထိခိုက္ပ်က္စီးသြားျပီး ေရဒီယို ဓါတ္သတၱိၾကြ အႏၱရာယ္ပ်ံ႕ႏွံ႕ ျဖစ္ေပၚလ်က္ရွိရာ ထိုသို႕ျပန္႔ႏွံ႕မႈကို ၁၉၈၆ ခုႏွစ္က ရုရွားႏိုင္ငံ ခ်ာႏိုလ္ဘိုင္း ဓါတ္ေပါင္းဖိုေပါက္ကြဲကာ ေရဒီယိုသတၱိၾကြ ဓါတ္ေရာင္ျခည္ ပ်ံ႕ႏွံ႕မႈႏွင့္ ႏႈိင္းယွဥ္ ေျပာဆိုေလ့ရွိပါသည္ ။ အခ်ိဳ႕က ဖူကူရွီးမားစက္ရံုမွ ေရဒီယိုသတၱိၾကြ ဓါတ္ေရာင္ျခည္ပ်ံ႕ ႏွံ႕မႈသည္ ခ်ာႏိုဘိုင္းေလာက္မဆိုးဟု ဆိုၾကသည္ ။ အခ်ိဳ႕က အတူတူပင္ျဖစ္သည္ဟု ေျပာၾကျပန္ေလသည္ ။အခ်ိဳ႔ကမူ ဂ်ပန္ႏိုင္ငံ ဖူကူရွီးမားစက္ရံုက လူေနထူထပ္ေသာေနရာ ျဖစ္ေသာေၾကာင့္ ပိုဆိုးသည္ဟု ေျပာၾကျပန္ေလသည္ ။ထိုသို႕ ေျပာၾကဆိုၾကသူမ်ားမွာ ပညာရွင္မ်ားခ်ည္း ျဖစ္ေနေပရာ Voice Of Myanmar ပရိတ္သတ္အေနျဖင့္ ႏိႈင္းယွဥ္သိရွိႏိုင္ပါရန္ ေဖၚျပအပ္ပါသည္။


Fukushima ႏွင့္ Chernobyl ႏိႈင္းယွဥ္ခ်က္ဇယား

Category Fukushima Daiichi Chernobyl
Source: Nuclear and Industrial Safety Agency, Japanese authorities, UNSCEAR. *Becquerels are a measurement of radiation
Date of accident 11 March 2011 26 April 1986
Accident details A magnitude-9.0 earthquake and resulting tsunami damaged the plant's power systems, causing cooling systems to fail. A series of gas explosions followed A sudden power output surge during a systems test caused a reactor vessel to rupture, leading to a series of blasts. An intense fire burned for 10 days
Severity rating Level 7 - major accident Level 7 - major accident
Number of reactors Six; but only three of concern, plus pools storing spent fuel Four; but only one reactor involved
Type of reactors Boiling-water reactors. Japanese authorities stress that unlike at Chernobyl, the containment vessels at Fukushima remain intact. Also, unlike Chernobyl, the reactors at Fukushima do not have a combustible graphite core Graphite-moderated boiling water reactor. The graphite made it highly combustible. The reactor also had no containment structure and nothing stopped the trajectory of radioactive materials into the air
Radiation released 370,000 terabecquerels* (as of 12 April) 5.2 million terabecquerels*
Area affected Officials say areas extending more than 60km (36 miles) to the north-west of the plant and about 40km to the south-southwest have seen radiation levels exceed annual limits Contamination of an area as far as 500 km (300 miles) from the plant, according to the UN. But animals and plants were also affected much further away
Evacuation zone 20km; 20-30km voluntary zone. Five communities beyond the existing evacuation zone have also been evacuated 30km
People evacuated Tens of thousands The authorities evacuated, in 1986, about 115,000 people from areas surrounding the reactor and subsequently relocated, after 1986, about 220,000 people from Belarus, the Russian Federation and Ukraine
Related deaths No deaths so far due to radiation A UN report places the total confirmed deaths from radiation at 64 as of 2008. Disputes continue about how many will eventually die
Long-term health damage Not yet known, but risks to human health are thought to be low Among the residents of Belarus, the Russian Federation and Ukraine, there had been up to the year 2005 more than 6,000 cases of thyroid cancer reported in children and adolescents who were exposed at the time of the accident, and more cases can be expected during the next decades
Current status Officials say radiation leaks are continuing and could eventually exceed those at Chernobyl. The priority is restoring adequate coolant to the fuel ponds and the reactors themselves The damaged reactor is now encased in a concrete shell. A new containment structure is due to be