Proposal for a Skilled Veterans Corps to install an alternative cooling system at the Fukushima-Daiichi Nuclear Power Plant
- In general, industrial plants are equipped with “FAIL-SAFE SYSTEMS” to stop operations safely if and when unexpected malfunctions occur by shutting off the energy or fuel supply to the system or otherwise disengaging power mechanisms.
- In the case of nuclear power plants, however, it is impossible to turn-off the fuel supply as the system is like “an operating burner inside a fuel tank”. The only means to averting a “meltdown” is to suppress the nuclear chain reaction by inserting control rods into the reactor core and to gradually cool the fuel rods with constantly circulating water.
- This means that a nuclear power plant cooling system SHOULD NEVER BE STOPPED, which is why the cooling system is robustly designed to provide double, triple or more redundant backup. Unfortunately, the recent tsunami was much more forceful than anticipated by the plant operators, and all of the back-up systems were destroyed or incapacitated.
- After the nuclear chain reaction is controlled, it is critical that the damaged cooling system be repaired or replaced with a new system, which should be designed to operate reliably on the scale of ten years or more. Cooling the system by hosing it with water is a temporary and unsustainable short-term measure.
- Repair or installation of the cooling system will unavoidably be conducted in an environment highly contaminated with radioactive elements with serious risk of future health complications. As such, young people with a long future should not have to be placed in a position of having to undertake such a task. Radiation exposure of a generation which may reproduce the next generation should be avoided, regardless of the amount.
- Our generation who has, consciously or unconsciously, approved the construction of the Fukushima nuclear power plants and enjoyed the benefits of the vast supply of electricity generated, in particular those of us who hailed the slogan that “Nuclear Power is Safe” should be the first to join the Skilled Veteran Corps to install or repair the cooling system. This is the duty of our generation to the next generation and the one thereafter.
- Currently, many of the workers engaged at the nuclear power plants are being employed without consideration of age, knowledge, skill or experience. The Skilled Veterans Corps shall consist of volunteers of veteran technicians and engineers who are much more qualified to carry out the work with much better on-site judgment.
Naka-kasai 5-chome 11-25-707, Edogawa-ku, Tokyo 134-0083, Japan
Tel & Fax: +81-(0)3-5659-3063 Mobile phone: +81-(0)90-5659-3063
Y. Yamda’s Biodata
Born in 1939
B. Sc. From Faculty of Engineering, Tokyo University
Employed by Sumitomo Metal Industries, Co. Ltd. 1962 – 1989. Worked in the field of metallurgical engineering, plant engineering, environment engineering, etc.
Since retirement worked independently as business consultant till 2005
Presently working as volunteer with NGO, etc. in several field
©2011 Fukushima nuclea power plant accidental discharge obstruction action project
Institute for Energy and Environmental Research’s president Arjun Makhijani made the following proposal to the situation at the Fukushima Daiichi Nuclear Power Plant.
Light and Water in Fukushima Back
Mar. 29, 2011:
Issues of Water and Light in the Turbine Buildings at Fukushima Daiichi
Workers at the Fukushima Daiichi plant have been trying to reestablish electricity connections to pumps so as to restart the cooling system for the reactors at the plant. According to news reports, two of the major obstacles have been
• a high radiation environment (on the order of 1,000 millisieverts per hour) due to contaminated water on the floor of the turbine buildings, and
• a lack of light in the turbine buildings, which has forced the electricians to work in the dark.
A former nuclear power plant designer Yuzo Uehara tweeted the following:
Proposal 290130: To recover with equipment you have right now is very unlikely without having protection against radiation exposure. You need to know how much tsunami and hydrogen explosion pressure had. You need to have big picture thinking. Get closer from the buildings and access from the outside. To drain contaminated water, don’t you have a plan to bring a 1000-ton-class tanker, and send and stock the water there?
Proposal 291430: In my culvert method plan, stop discharge and remove the debris in the first stage. The minimum recovery. The forefront has a movable pipe nozzle to inject water, and remove contaminated water and debris. It is remote controlled by a crane from the inside of the culvert. The targeted period to complete this is a week. In the second stage, the full-scale recovery’s main objective is expansion. It’s like having a space station on the ground.
Proposal 291500: In the first stage, if we had an 1km-culvert, transportation, heavy machinery, resources, processing, and manpower cost about 2 billion yen. If we had 2km one, then 30% increase. In the second stage, the cost is about the same, but it gets increased by making the forefront more sophisticated. By publicizing the cost, I’d like to make it as the commitment to the public.
A former nuclear power plant designer with 36-year-experience Yuzo Uehara sent his proposal with the diagrams to this blog. Thank you, Mr. Uehara.
The Culvert Prefabrication Method System to cool down Fukushima Daiichi nuclear reactors while minimizing radiation exposure
(Some texts have not been translated since most of them have been already covered by his tweets. So, please refer to the translated texts on this blog.)
(click the images to enlarge)
The original diagrams are here and here.
A former nuclear power plant designer Yuzo Uehara raises some questions that are out of his field.
261720: I think those who are related to river hydraulics in Japan have been already working, but we already know that the path of the radiation contaminated water goes like this: rain > mountains underground water channels > rivers > dams > rivers > sea. After using underground pools with cascade to dilute, you can estimate where the best place to discharge is. Propose the solution for Japan!
261740: To all experts in meteorology. Please estimate where wind blocking walls should be installed around the site and how large and high they should be. And, when it rains or snows, radiation goes up at the site ground, but can the walls prevent radiation from spreading out?