Workers conduct operations to construct an underground ice wall at Tokyo Electric Power Co.'s (Tepco) tsunami-crippled Fukushima Daiichi nuclear power plant in Fukushima Prefecture July 9, 2014. The media were shown on Tuesday the site where Tepco is
Workers conduct operations to construct an underground ice wall at Tokyo Electric Power Co.'s (Tepco) tsunami-crippled Fukushima Daiichi nuclear power plant in Fukushima Prefecture July 9, 2014. The media were shown on Tuesday the site where Tepco is building a massive underground ice wall to contain leaking radioactive water. The utility is planning to build a 1.4-kilometre underground wall of ice around four reactor buildings at Fukushima to prevent underground water from flowing in, and stop radioactive water seeping into the Pacific Ocean. In the three years since a massive earthquake and tsunami set off nuclear meltdowns at Fukushima, Tepco has been fighting a constant battle to pump out, treat and store hundreds of thousands of tonnes of contaminated water. REUTERS/Kimimasa Mayama/Pool REUTERS/Kimimasa Mayama/Pool

Radiation levels of the waters at crippled Fukushima Daiichi nuclear plant have surged to an all-time high, monitoring tests revealed.

According to state media outlet NHK, the back-to-back weather disturbance Typhoons VongFong and Phanfone had triggered the elevated radiation quantities at the plant. Samples taken by Tepco Electric Power Company (TEPCO) on Oct 8 and 9 had revealed the levels of radioactive isotope cesium, a cancer-causing agent, are now at 251,000 becquerels per litre, three times higher over the figures maintained in records.

Typhoon Phanfone had dropped excessive rainfall on Oct 6. The operator said this had leaked into the sub-soil and then mixed with the corrupted fluid from the damaged reactors.

Levels of tritium, another radioactive isotope of hydrogen, were also found to be remarkably high based on Oct 9 samples which indicated 150,000 becquerels of tritium per litre in the groundwater near Fukushima, Japan's JIJI agency said. It noted the latest figures was over 10 times higher from the last samples that was taken only last week.

Authorities have been highly monitoring the contaminated waters in the nuclear power plant facility in Fukushima that was crippled by a tsunami in March 2011, triggered by a massive 9.0 magnitude earthquake. Authorities as much as possible don't want both radioactive substances cesium and tritium to be discharged into the Pacific Ocean in high quantities.

Strontium-90, materials that emit beta rays and causes bone cancer, likewise hit 1.2 million becquerels, JIJI said, citing TEPCO. Cobalt-60 and manganese-54 both also struck record-high figures.

Meantime, TEPCO has announced plans of removing the canopy installed over Fukushima No. 1 nuclear plant's No. 1 reactor building. The company said it needed to do the procedure to get rid of the huge amounts of highly contaminated debris, rubble and dust that had remained inside the building since the accident three years ago.

According to the detailed work scope TEPCO had given to the Fukushima prefectural government 13 nearby municipalities, 48 holes will be drilled on the roof of the cover, about 30-centimetre squares. Synthetic resin will then be sprayed from the holes. It said the synthetic resin will act as anti-scattering agents that will lessen the chances of rising radioactive materials.