Skip to content


Ice wall at Fukushima plant switched on, but will it work? via AP

Q. WHAT IS AN ICE WALL?

A. Engineers installed 1,550 underground refrigeration pipes designed to create a 1.5-kilometer (0.9-mile) barrier of frozen soil around four damaged reactor buildings and their turbines to control groundwater flowing into the area and prevent radioactive water from seeping out. The pipes are 30 meters (100 feet) deep, the equivalent of a 10-story building. Engineers say coolant in the pipes will freeze the surrounding soil to minus 30 degrees Celsius (minus 22 Fahrenheit), creating the wall over several months.

Q. WHY IS AN ICE WALL NEEDED?

A. The cores of three of the damaged reactors melted during the accident and must be cooled constantly with water to keep them from overheating again. The cooling water becomes radioactive and leaks out through damaged areas into the building basements, where it mixes with groundwater, increasing the volume of contaminated water. Nearly 800,000 tons of radioactive water have been pumped out, treated and stored in 1,000 tanks that now occupy virtually every corner of the Fukushima plant, interfering with its decontamination and decommissioning and adding to the risk of further leaks of water into the nearby ocean.

Q. ARE THERE RISKS?

A. Construction officials say the coolant is environmentally safe. There were doubts that the huge refrigeration system could effectively freeze the soil while groundwater continues to flow in the area. The operator, Tokyo Electric Power Co., says results from a test of part of the wall last summer were mixed but suggest the system has sufficient capability. Experts are also concerned that an ice wall cannot be adjusted quickly in an emergency situation, such as a sudden increase in the flow of contaminated water, because it takes several weeks to freeze or melt. Electrical costs for running the refrigeration system could be steep. TEPCO says the wall, once formed, can remain frozen for up to two months in the event of a power failure.[…]

Read more.

Posted in *English.

Tagged with , .


3 Responses

Stay in touch with the conversation, subscribe to the RSS feed for comments on this post.

  1. zkseo786 says

    Harden’s current contract at the end of this season has a player option of 47.3 million to choose from for the 2022-23 season. will have an unrestricted status Free agents enter the market.link alternatif sbobet

  2. zkseo786 says

    Thanks!!! obliged for the update and fast answer. I’ll make certain to watch out for this string. Searching for a similar issue. Caught your string. A debt of gratitude is in order for making it. Searching forward for arrangement. A debt of gratitude is in order for the information I will attempt to sort it out for additional On account of this article I can find out additional. Grow my insight and capacities. As a matter of fact the article is genuine.poker uang asli

  3. leily says

    آب شیرین کن صنعتی RO از روش اسمز معکوس استفاده نموده و به کمک غشاهای نیمه تراوا املاح و فلزات سنگین و آلودگی های موجود در آب را با فشار زیاد حذف می کند. در واقع اسمز معکوس فرآیندی است که در آن از فشار براي معکوس نمودن جریان اسمزي آب از درون یک غشای نیمه تراوا استفاده میشود. اگر یک غشاي نیمه تراوا بین دو محلول آب خالص و آب ناخالص قرار گیرد آب به گونه ای طبیعی و تحت خاصیت اسمزی از غلظت پایین تر به غلظت بالاتر جریان می یابد.
    https://www.farabtadbir.com/%d8%a2%d8%a8-%d8%b4%db%8c%d8%b1%db%8c%d9%86-%da%a9%d9%86-%d8%b5%d9%86%d8%b9%d8%aa%db%8c-ro/



Some HTML is OK

or, reply to this post via trackback.