Nuclear safety 101

by Jaakko Nissiat 2011-03-12 22:28:49

About two days ago a magnitude 8.8(8.9?) earthquake, a tsunami and a number of aftershocks hit the east coast of japan. Among the sheer amount of human tradegy there was one event that really stood out.

The Fukushima Dai-ichi nuclear power plant suffered a power failure as the tsunami cut off-site power and apparently made the on-site diesel generators be counted as off-site power source as well. This led to the coolant circulation system failure, temperature buildup in the core and currently some kind of explosion, some radiation leak but apparently no core meltdown at least. This has had me pondering all day...

  • Why is the plant cooling dependent of off-site power?
  • Why is the on-site power off-site power when seen from the generator room?
  • Why is there no non-electric emergency cooling?

I thought maybe the following system could be considered:

  1. An array of stirling engines is connected to both the hot and the cold side of the coolant channels and they all generate on-site electricity.
  2. Another array of stirlings is connected to the hot coolant channels and an external cold source(sea water?) and also generate electricity.
  3. Third array of stirlings pump "manually" i.e. they are connected to pumps and when the plant operates normally are disconnected by clutch discs kept open by electric magnets connected to the both off-site and on-site power and only operate if both power sources are lost.

This would make me think there would always be sufficient cooling power even if all possibilities of getting electricity to run the pumps is lost. The most reliable version of stirling should be used, about one half of any array should be enough to cool the reactor and at most one third of an array should be taken offline for maintenance at any point in time.

Disclaimer: I am not any kind of professional on all things nucular and this is just off the top of my head. If there is a patent for this type of safety, I am not associated with it and if there is not, there won't be now. =)

Nuclear power Safety Japan Earthquake Tsunami
I hope you'll soon be able to afford a bukacp system and possibly a generator with an ATS. Thanks for being there on all the other days (especially Night Rythms) and good luck getting back online again.-kps: Any prospects for streaming your programs online? I have some friends out of the area to whom I'd recommend your station.
by: Rosana
I disagree. BMW has cnhaged their products in later years and have switched to cheaper plastic in their cooling systems which has resulted in many, many catastrophic overheats. The E39 models are notorious for cooling system failures, especially the V-8 models. I'm considering changing to an all aluminum Zionsville radiator and expansion tank in my E39 so that I don't have to constantly worry about overheating as I have no confidence in the BMW plastic cooling components.
by: Vikash
Thank you very much for all your videos and help. I have oriaingl radiators on my 1997 528iA with 223000 km and 1998 M3 with 128000 km. Generally, the 6 cyl BMW cooling is good (except for the plastic pump impeller, which in case of my 1997 was metal as I pulled it out and checked), What this video didn't cover is the electric AC fan. I had the resistor for the first speed failed so it was always off when AC was working and which may have resulted in the overheating. [url=]pkvkgyuto[/url] [link=]rfhoppzt[/link]
by: KekeziinhOo
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by: Etty
統一教会だから何をやっても認めない すばらしくカルトチックな記事です カルト脳全開といったところだね アメリカじゃSeijin君のことは 他でも記事にされています 統一教会だからというバイアスなしでダメなものはダメ 良いものは良いと云えなければダメダメ記者と新聞もどきでしょう そういえば統一教会に関する良いことは書かない それが藤倉のポリシーでしたね すばらしい英語力でSeijin君の記事でも読んでくださいな Dallas, TX) Salutations from Dallas Mayor Mike Rawlings will be read at the Faith, Freedom and Family Rally at Dallas City Hall Plaza at 10:00 a.m. Monday, Jan. 2, 2012. Mayor Rawlings' welcoming remrkas will be read by talk-show host Ester Davis, who joins local civic and religious leaders, as well as Japanese-Americans wearing kimonos, to welcome two university students who have embarked on a 2,300-mile bicycle ride to raise awareness of religious freedom in Japan and other countries. The cyclists began the tour at Atlanta's Gold Dome State Capitol on Dec. 15, 2012. The keynote speaker at the rally will be Bishop Harold Edwards, leader of the Church of the Living God in Dallas. Organizers say the goal of the tour is to raise public awareness of the fact that since 1966 more than 4,000 Unification Church members in Japan, as well as significant numbers of members of other faiths, have been abducted and confined for months or years of psychological and physical abuse in an effort to break their faith. Houston resident Mrs. Taeko White will recount her experience of abduction and deprogramming in 1981. Jeffrey White, 24, her son, will read a tribute to his mother. Mr. Luke Higuchi, a Japanese survivor of abduction and forced conversion, will report his experience at the rally.Advertisement Mr. Seijin Tranberg and Mr. Joshua Wildman, both 22, began their Freedom Ride on December 15, 2011 in Atlanta, the birthplace of the U.S. Civil Rights Movement, under the banner of Faith, Freedom, and Family. Prior to starting their tour, Mr. Tranberg briefed twelve congressmen at their offices on Capitol Hill. All 12, representing states from Georgia to California, expressed support for persecuted religious people of the world by signing Mr. Tranberg's route map and posing with him for photographs. Mr. Tranberg also is calling the rally to raise awareness of the rights abuses against religious minorities the world over, including Baptists in Russia, Coptic Christians in Egypt, Bahai's in Iran, and many others. Representatives of several persecuted minority groups, including African Christians, Hindus, Muslims, and others will be on hand. The rally has sparked supportive comment from local leaders. Rev. Don E. Peavy, Sr., Associate Minister, New Vision Christian Church in Fort Worth has written: We wish Seijin and Joshua Godspeed in their momentous adventure to spread the Gospel of the common bond we all share as children of God. Their mission is particularly critical at this moment given the mass killings in Nigeria on Christmas Day and the religious insensitivity and intolerance which continue to keep far too many people from living the abundant life for which Jesus the Christ came into the world. Contact: Laura Lea media relations HSA UWC Unification Church of Texas [url=]drssooaaz[/url] [link=]bwoxubsq[/link]
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