2. Index
● How much radiation is dangerous?
● Warning of food radiation.
● CT scan radiation.
● Japan emergency workers.
● Tokyo water radiation.
3. How much radiation is dangerous?
● People are constantly exposed to some level of
natural radiation. But the change appears when the
definite value is exceeded.
For example
● 50-100: changes in blood chemistry
● 500: nausea, within hours
● 700: vomiting
● 900: diarrhoea
● 1,000: haemorrhage
● 4,000: possible death within 2 months, if no treatment
4. Warning of food radiation
● Cases of contaminated vegetables and milk have
already stoked anxiety despite assurances from
officials that the levels are not dangerous.
● The government has prohibited the sale of
spinach from all four prefectures near the plant
and also banned selling of raw milk from
Fukushima prefecture.
5. CT scan radiation
● Old times, CT scans done in 2007 alone will
cause about 29,000 cancers and kill nearly
15,000 Americans.
● The radiation dosage from one scan typically
ranges from a few millisieverts comparable to the
yearly background radiation from natural sources
to tens of millisieverts.
6. Japan emergency workers
● Nuclear power plant may give emergency
workers "lethal doses" of radiation.
● It would be very difficult for emergency workers to
get near the reactors.
● The doses they could experience would
potentially be lethal doses in a very short period of
time.
7. Tokyo water radiation
● The radiation levels in Tokyo city tapwater has
dropped back below the safety limit for infants.
● The concern about radiation in water comes as
workers try to prevent leaks of radiation from an
earthquake-damaged nuclear power plant 150
miles north of Tokyo.
