in the contaminated water that leaked from underneath the pit near the Reactor 2 water intake.
Remember that one? TEPCO tried bath salt as a tracer to figure out where the water was coming from, until they finally figured out how to stop the leak.
Assuming the leak started on April 1 and lasted until April 6, TEPCO says 4,700 terabecquerels of radioactive materials were released from the crack into the ocean.
From TEPCO's press release (in Japanese):
- Iodine-131: 2.8 x 10^15 becquerels (2,800 terabecquerels)
- Cesium-134: 9.4 x 10^14 becquerels (940 terabecquerels)
- Cesium-137: 9.4 x 10^14 becquerels (940 terabecquerels)
- Total: 4.7 x 10^15 becquerels (4,700 terabecquerels)