Title: Survey on Distribution of Debris in Unit 4 Spent Fuel Pool, Fukushima Daiichi
Nuclear Power Station
Date: March 12, 2012
ROV*, which is controlled remotely and whose underwater camera is a self propelling is used for the survey on the distribution of debris in the spent fuel pool.
We will through ROV in SPF through the slit of floats covering the pool. We operate it from the operating floor.
We are considering to move control rods currently stored in the cask pit to the bottom of Reactor in the future when we take out the fuel in SPF [sic]. We will survey debris fallen down to the bottom of Reactor to organize the plan.
Read the report here
Published: March 12th, 2012 at 12:09 pm ET
- Tepco prepares to film Spent Fuel Pool No. 4 — “You can vaguely discern the fuel rods” says worker February 10, 2012
- Tepco releases video of Spent Fuel Pool No. 4: Debris that fell on racks of fuel rods “apparently” caused no damage (VIDEO) February 10, 2012
- Japan Nuclear Expert: There are known to be broken fuel rod assemblies in Spent Fuel Pool No. 4 — Large amount of radioactive material has fallen to bottom — “Many years” to get fuel out (VIDEO) May 7, 2012
- Canadian Nuclear Scientist: Another, even more dangerous possibility than fire at Spent Fuel Pool No. 4 — Re-initiation of chain reaction can occur if fuel rods move slightly, an “accidental criticality” April 29, 2012
- Ex-Fukushima Worker: High risk they’ll break fuel rods in Unit 4 pool — Gundersen: Moving fuel risks nuclear chain reaction; You can’t stop it, no control rods to control it August 14, 2013