Radioactive Spike in Ocean off Fukushima: Highest Cs-137 levels at location since 2011 — 22,000 Bq/m³ in Pacific outside port — Japan notifies IAEA of ‘elevated’ readings (MAP)

Published: April 14th, 2014 at 9:22 am ET
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IAEA, Apr. 8, 2014: Japan Reports on Conditions at TEPCO’s Fukushima Daiichi Nuclear Power Station — On 8 April 2014, Japan provided the IAEA with an update to current information on radioactivity in seawater at TEPCO’s Fukushima Daiichi Nuclear Power Station (NPS). Japan’s Nuclear Regulatory Authority (NRA) continues to closely monitor the radioactivity levels in seawater and reports that levels of Cs-134 and Cs-137 at T-1 and T-2-1, and total Beta at T-2-1 are likely to be elevated temporarily on 4 April 2014. These sampling points near Fukushima NPS are sentinels to assess effects on the environment by incidents including a leakage of contaminated water.

Nuclear Regulation Authority (Japan) pdf, Apr. 8, 2014: The sampling points T-1 and T-2-1 near Fukushima Daiichi Nuclear Power Station are sentinels to assess effects on the environment by incidents including a leakage of contaminated water. The NRA is watching closely the radioactivity levels in seawater as usual, although the levels of Cs-134 and Cs-137 at T-1 and T-2-1 and total Beta at T-2-1 on 4 April are likely to be elevated temporarily.

Apr. 4, 2014 — Current Information on Radioactivity in Seawater(pdf):

  • 1.1km northern point (T-1) — Cs-134 @ 8,700 Bq/m³; Cs-137 @ 22,000 Bq/m³
  • 1.3km southern point (T-2-1) — Cs-134 @ 4,400 Bq/m³; Cs-137 @ 12,000 Bq/m³

See all results from these 2 sampling locations dating back to March 2011 here (csv)

Published: April 14th, 2014 at 9:22 am ET
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Fukushima Daiichi, Japan (Fukushima)
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