Teknologi nuklir

[BlaCkwINg]

Hi! gua lagi pengen tau tentang Nuklir nih.. ada yang bisa bantu saya gak? :D
tolong ya ::maap::
o iya, menurut anda T semua, Teknologi nuklir lebih banyak untungnya apa ruginya?

[Luagefak Stalker]

Originally posted by BlaCkwINg
Hi! gua lagi pengen tau tentang Nuklir nih.. ada yang bisa bantu saya gak? :D
tolong ya ::maap::
o iya, menurut anda T semua, Teknologi nuklir lebih banyak untungnya apa ruginya?

bisa lebi spesifik teknologi apanya?

bom ato plt-nya?....

nuklir....powerful but dangerous......

btw...gelarnya Jedi Padawan tapi koq avatarnya....;D

[BlaCkwINg]

hmmmm.... sebagai permulaan bomnya dulu aja kali yah..;D
soal avatar & status... they don't have to match each other right? :)

[Luagefak Stalker]

ya deh....;D

How Nuclear Bombs Work
by Craig C. Freudenrich, Ph.D.

You have probably read in history books about the atomic bombs used in World War II. You may also have seen fictional movies where nuclear weapons were launched or detonated (Fail Safe, Dr. Strangelove, The Day After, Testament, Fat Man and Little Boy, The Peacemaker , just to name a few). In the news, while many countries have been negotiating to disarm their arsenals of nuclear weapons, other countries such as India and Pakistan have been developing nuclear weapons programs.

We have seen that these devices have incredible destructive power, but how do they work? In this edition of HowStuffWorks , you will learn about the physics that makes a nuclear bomb so powerful, how nuclear bombs are designed and what happens after a nuclear explosion.

Physics of Nuclear Devices
Nuclear bombs involve the forces, strong and weak, that hold the nucleus of an atom together, especially atoms with unstable nuclei (see How Nuclear Radiation Works for details). There are two basic ways that nuclear energy can be released from an atom:

* Nuclear fission - You can split the nucleus of an atom into two smaller fragments with a neutron. This method usually involves isotopes of uranium (uranium-235, uranium-233) or plutonium-239.
* Nuclear fusion -You can bring two smaller atoms, usually hydrogen or hydrogen isotopes (deuterium, tritium), together to form a larger one (helium or helium isotopes); this is how the sun produces energy.

In either process, fission or fusion, large amounts of heat energy and radiation are given off.

Designs of Nuclear Bombs
To build an atomic bomb, you need:

* A source of fissionable or fusionable fuel
* A triggering device
* A way to allow the majority of fuel to fission or fuse before the explosion occurs (otherwise the bomb will fizzle out)

The first nuclear bombs were fission devices, and the later fusion bombs required a fission-bomb trigger. We will discuss the designs of the following devices:

* Fission bombs (in general)
* Gun-triggered fission bomb (Little Boy), which was detonated over Hiroshima, Japan, in 1945
* Implosion-triggered fission bomb (Fat Man), which was detonated over Nagasaki, Japan, in 1945
* Fusion bombs (in general)
* Teller-Ulam design of a hydrogen fusion bomb, which was test-detonated on Elugelap Island in 1952

Fission Bombs
A fission bomb uses an element like uranium-235 to create a nuclear explosion. If you have read How Nuclear Radiation Works , then you understand the basic process behind radioactive decay and fission. Uranium-235 has an extra property that makes it useful for both nuclear-power production and nuclear-bomb production -- U-235 is one of the few materials that can undergo induced fission. If a free neutron runs into a U-235 nucleus, the nucleus will absorb the neutron without hesitation, become unstable and split immediately.

This figure shows a uranium-235 nucleus with a neutron approaching from the top. As soon as the nucleus captures the neutron, it splits into two lighter atoms and throws off two or three new neutrons (the number of ejected neutrons depends on how the U-235 atom happens to split). The two new atoms then emit gamma radiation as they settle into their new states (see How Nuclear Radiation Works). There are three things about this induced fission process that make it interesting:

* The probability of a U-235 atom capturing a neutron as it passes by is fairly high. In a bomb that is working properly, more than one neutron ejected from each fission causes another fission to occur. This condition is known as supercriticality.

* The process of capturing the neutron and splitting happens very quickly, on the order of picoseconds (1*10E-12 seconds).

* An incredible amount of energy is released, in the form of heat and gamma radiation, when an atom splits. The energy released by a single fission is due to the fact that the fission products and the neutrons, together, weigh less than the original U-235 atom.

The difference in weight is converted to energy at a rate governed by the equation e = m * c^2. A pound of highly enriched uranium as used in a nuclear bomb is equal to something on the order of a million gallons of gasoline. When you consider that a pound of uranium is smaller than a baseball and a million gallons of gasoline would fill a cube that is 50 feet per side (50 feet is as tall as a five-story building), you can get an idea of the amount of energy available in just a little bit of U-235.

In order for these properties of U-235 to work, a sample of uranium must be enriched . Weapons-grade uranium is composed of at least 90-percent U-235.

In a fission bomb, the fuel must be kept in separate subcritical masses, which will not support fission, to prevent premature detonation. Critical mass is the minimum mass of fissionable material required to sustain a nuclear fission reaction. This separation brings about several problems in the design of a fission bomb that must be solved:

* The two or more subcritical masses must be brought together to form a supercritical mass, which will provide more than enough neutrons to sustain a fission reaction, at the time of detonation.
* Free neutrons must be introduced into the supercritical mass to start the fission.
* As much of the material as possible must be fissioned before the bomb explodes to prevent fizzle.

To bring the subcritical masses together into a supercritical mass, two techniques are used:

* Gun-triggered
* Implosion

Neutrons are introduced by making a neutron generator . This generator is a small pellet of polonium and beryllium, separated by foil within the fissionable fuel core. In this generator:

1. The foil is broken when the subcritical masses come together and polonium spontaneously emits alpha particles.
2. These alpha particles then collide with beryllium-9 to produce beryllium-8 and free neutrons.
3. The neutrons then initiate fission.

Finally, the fission reaction is confined within a dense material called a tamper , which is usually made of uranium-238. The tamper gets heated and expanded by the fission core. This expansion of the tamper exerts pressure back on the fission core and slows the core's expansion. The tamper also reflects neutrons back into the fission core, increasing the efficiency of the fission reaction.

Gun-Triggered Fission Bomb
The simplest way to bring the subcritical masses together is to make a gun that fires one mass into the other. A sphere of U-235 is made around the neutron generator and a small bullet of U-235 is removed. The bullet is placed at the one end of a long tube with explosives behind it, while the sphere is placed at the other end. A barometric-pressure sensor determines the appropriate altitude for detonation and triggers the following sequence of events:

1. The explosives fire and propel the bullet down the barrel.
2. The bullet strikes the sphere and generator, initiating the fission reaction.
3. The fission reaction begins.
4. The bomb explodes.

Little Boy was this type of bomb and had a 14.5-kiloton yield (equal to 14,500 tons of dynamite) with an efficiency of about 1.5 percent. That is, 1.5 percent of the material was fissioned before the explosion carried the material away.

Implosion-Triggered Fission Bomb
Early in the Manhattan Project , the secret U.S. program to develop the atomic bomb, scientists working on the project recognized that compressing the subcritical masses together into a sphere by implosion might be a good way to make a supercritical mass. There were several problems with this idea, particularly how to control and direct the shock wave uniformly across the sphere. But the Manhattan Project team solved the problems. The implosion device consisted of several subcritical masses of plutonium-239 surrounded by high explosives within a sphere of uranium-238 (tamper). When the bomb was detonated, this is what happened:

* The explosives fired, creating a shock wave.
* The shock wave propelled the plutonium pieces together into a sphere.
* The plutonium pieces struck a pellet of beryllium/polonium at the center.
* The fission reaction began.
* The bomb exploded.

Fat Man was this type of bomb and had a 23-kiloton yield with an efficiency of 17 percent. These bombs exploded in fractions of a second. The fission usually occurred in 560 billionths of a second.

Fusion Bombs
Fission bombs worked, but they weren't very efficient. Fusion bombs, also called thermonuclear bombs, have higher kiloton yields and greater efficiencies than fission bombs. To design a fusion bomb, some problems have to be solved:

* Deuterium and tritium, the fuel for fusion, are both gases, which are hard to store.
* Tritium is in short supply and has a short half-life, so the fuel in the bomb would have to be continuously replenished.
* Deuterium or tritium has to be highly compressed at high temperature to initiate the fusion reaction.

First, to store deuterium, the gas could be chemically combined with lithium to make a solid lithium-deuterate compound. To overcome the tritium problem, the bomb designers recognized that the neutrons from a fission reaction could produce tritium from lithium (lithium-6 plus a neutron yields tritium and helium-4; lithium-7 plus a neutron yields tritium, helium-4 and a neutron). That meant that tritium would not have to be stored in the bomb. Finally, Stanislaw Ulam recognized that the majority of radiation given off in a fission reaction was X-rays and that these X-rays could provide the high temperatures and pressures necessary to initiate fusion. Therefore, by encasing a fission bomb within a fusion bomb, several problems could be solved.

[Luagefak Stalker]

Teller-Ulam Design of a Fusion Bomb
To understand this bomb design, imagine that within a bomb casing you have an implosion fission bomb and a cylinder casing of uranium-238 (tamper). Within the tamper is the lithium deuterate (fuel) and a hollow rod of plutonium-239 in the center of the cylinder. Separating the cylinder from the implosion bomb is a shield of uranium-238 and plastic foam that fills the remaining spaces in the bomb casing. Detonation of the bomb caused the following sequence of events:

1. The fission bomb imploded, giving off X-rays.
2. These X-rays heated the interior of the bomb and the tamper; the shield prevented premature detonation of the fuel.
3. The heat caused the tamper to expand and burn away, exerting pressure inward against the lithium deuterate.
4. The lithium deuterate was squeezed by about 30-fold.
5. The compression shock waves initiated fission in the plutonium rod.
6. The fissioning rod gave off radiation, heat and neutrons.
7. The neutrons went into the lithium deuterate, combined with the lithium and made tritium.
8. The combination of high temperature and pressure were sufficient for tritium-deuterium and deuterium-deuterium fusion reactions to occur, producing more heat, radiation and neutrons.
9. The neutrons from the fusion reactions induced fission in the uranium-238 pieces from the tamper and shield.
10. Fission of the tamper and shield pieces produced even more radiation and heat.
11. The bomb exploded.

All of these events happened in about 600 billionths of a second (550 billionths of a second for the fission bomb implosion, 50 billionths of a second for the fusion events). The result was an immense explosion that was more than 700 times greater than the Little Boy explosion: It had a 10,000-kiloton yield.

Consequences of Nuclear Explosions
The detonation of a nuclear bomb over a target such as a populated city causes immense damage. The degree of damage depends upon the distance from the center of the bomb blast, which is called the hypocenter or ground zero. The closer one is to the hypocenter, the more severe the damage. The damage is caused by several things:

* A wave of intense heat from the explosion
* Pressure from the shock wave created by the blast
* Radiation
* Radioactive fallout (clouds of fine radioactive particles of dust and bomb debris that fall back to the ground)

At the hypocenter, everything is immediately vaporized by the high temperature (up to 500 million degrees Fahrenheit or 300 million degrees Celsius). Outward from the hypocenter, most casualties are caused by burns from the heat, injuries from the flying debris of buildings collapsed by the shock wave, and acute exposure to the high radiation. Beyond the immediate blast area, casualties are caused from the heat, radiation, and fires spawned from the heat wave. In the long-term, radioactive fallout occurs over a wider area because of prevailing winds. The radioactive fallout particles enter the water supply and are inhaled and ingested by people at a distance from the blast.

Scientists have studied survivors of the Hiroshima and Nagasaki bombings to understand the short-term and long-term effects of nuclear explosions on human health. Radiation and radioactive fallout affect those cells in the body that actively divide (hair, intestine, bone marrow, reproductive organs). Some of the resulting health conditions include:

* Nausea, vomiting and diarrhea
* Cataracts
* Hair loss
* Loss of blood cells

These conditions often increase the risk of:

* Leukemia
* Cancer
* Infertility
* Birth defects

Scientists and physicians are still studying the survivors of the bombs dropped on Japan and expect more results to appear over time.

In the 1980s, scientists assessed the possible effects of nuclear warfare (many nuclear bombs exploding in different parts of the world) and proposed the theory that a nuclear winter could occur. In the nuclear-winter scenario, the explosion of many bombs would raise great clouds of dust and radioactive material that would travel high into Earth's atmosphere. These clouds would block out sunlight. The reduced level of sunlight would lower the surface temperature of the planet and reduce photosynthesis by plants and bacteria. The reduction in photosynthesis would disrupt the food chain, causing mass extinction of life (including humans). This scenario is similar to the asteroid hypothesis that has been proposed to explain the extinction of the dinosaurs. Proponents of the nuclear-winter scenario pointed to the clouds of dust and debris that traveled far across the planet after the volcanic eruptions of Mount St. Helens in the United States and Mount Pinatubo in the Philippines.

Nuclear weapons have incredible, long-term destructive power that travels far beyond the original target. This is why the world's governments are trying to control the spread of nuclear-bomb-making technology and materials and reduce the arsenal of nuclear weapons deployed during the Cold War.

[E121F]

ada yang lebih singkatnya, panjang banget ;D

[Windy Reed]

bom meledak
orang mati cepet atau lambat

there you go, singkat dan padat :D

[E121F]

wo..
thx a lot ;D

[ImPala]

yang gak terlalu singkat:
1. Sebagai pembangkit tenaga, Nuklir itu sangat ngebantu. Tapi ya resikonya itu kena radiasi... buntut-buntutnya ... gep...
2. Sebagai bom... ya menguntungkan.. bagi yang ngelepas.. tapi rugi banget bagi yang kena... ;D...

[E121F]

hehehe, besok ulg fisika tentang penggunaan teknologi nuklir nih ;D
doain gue biar dapet perfect yah :D
ulg ke 2 gue jelek sih ;D

[Windy Reed]

ganti dengan Uenon, satu jenis partikel yang bisa memancarkan energi terus tanpa henti, bisa buat sumber tenaga. Masalahnya waktu transisi jadi bentuk terbuka -semacam hyperspace gate- efeknya itu bisa nimbulin ledakan
*efek lagi gila Seikai no Monshou*

[E121F]

WR : ngeyel ya? ;D

[Ztar Kraftz]

Originally posted by BlaCkwINg
Hi! gua lagi pengen tau tentang Nuklir nih.. ada yang bisa bantu saya gak? :D
tolong ya ::maap::
o iya, menurut anda T semua, Teknologi nuklir lebih banyak untungnya apa ruginya?

jika dilihat bukan dari sisi perang, pasti jelas banyakan untungnya

[Ztar Kraftz]

Originally posted by Windy Reed
ganti dengan Uenon, satu jenis partikel yang bisa memancarkan energi terus tanpa henti, bisa buat sumber tenaga. Masalahnya waktu transisi jadi bentuk terbuka -semacam hyperspace gate- efeknya itu bisa nimbulin ledakan
*efek lagi gila Seikai no Monshou*

WTF ??! apaan tuh ?

[Windy Reed]

udah, jangan dianggap serius, cuman fiktif kok ;D

[sukalada]

bahaya atau enggaknya tergantung yg make..
contohnya pisau yg dipake buat didapur bisa bahaya klo dipake buat ngebunuh atau dipegang ama anak kecil.. bisa ngebahayain diri sendiri dan orang laen...

nuklir selain buat senjata dan pembangkit listrik juga bisa dipake buat kesehatan.. biasanya untuk diagnosa penyakit (sekarang udah banyak dipake di indo)...

klo buat pembangkit listrik kayaknya masih banyak yg nentang tuh...

[Ztar Kraftz]

kenapa banyak yang nentang, padahal nuklir adalah sumber energi yang paling bagus dan tenaga yang dikeluarkan bisa berlipat lipat kali dari pada PLTA/U/G/... dll.

trus soal sampah nuklir, sekarang telah dikembangkan teknologi fusi nuklir, yaitu proses penggabungan inti nuklir yang terkendali. hasil keluarannya bisa 2x lebih besar daripada teknologi fisi nuklir. bahannya bersih yaitu Hidrogen, banyak lagi, gakbakal abis2 sampe kapanpun. jadi kenapa gak setuju ?

[Luagefak Stalker]

alasan ngaa setuju?
salah satunya: CHERNOBYL

[MightyAbrams]

salah satunya: CHERNOBYL

ah itu kan gara2 orang Rusia rada ndablek njaga reaktornya.. Lagian sekarang udah gak ada masalah kan?

namanya juga teknologi kan sekali2 rada kacau kan gak pa pa.. Makanya kalau bikin reaktor cari lokasi yg kalo meledug bikin gembira masyarakat..

Kantor Pusat PDI Perjuangan ato Gedung MPR/DPR contohnya.. Jgn diKantor Pusat RCTI.. soalnya kalo meledug kita semua gak bisa nonton World Cup.


nb: eh.. caranya bikin ikon aneh2 itu gimana sih?

[Windy Reed]

Originally posted by MightyAbrams

ah itu kan gara2 orang Rusia rada ndablek njaga reaktornya.. Lagian sekarang udah gak ada masalah kan?

namanya juga teknologi kan sekali2 rada kacau kan gak pa pa.. Makanya kalau bikin reaktor cari lokasi yg kalo meledug bikin gembira masyarakat..

Kantor Pusat PDI Perjuangan ato Gedung MPR/DPR contohnya.. Jgn diKantor Pusat RCTI.. soalnya kalo meledug kita semua gak bisa nonton World Cup.

nb: eh.. caranya bikin ikon aneh2 itu gimana sih?
nila setitik rusak susu sebelanga

satu kali Chernobyl ama Hiroshima udah cukup buat bikin orang merasa mereka bisa mati sengsara sampe 7 turunan kalo ada reaktor nuklir :D

[sukalada]

iya betul kondisi keamanan di indo... takutnya ada kerusuhan dan ada yg iseng ngebakar reaktor.. ;D

FYI.. reaktor nuklir di indo udah cukup banyak lho.. di serpong ama di Batan bandung.. ga tau tuh yg Batan kota laen tapi kayaknya punya..

[Ztar Kraftz]

Originally posted by Luagefak Stalker
alasan ngaa setuju?
salah satunya: CHERNOBYL

itu karena pusat pembangkit nuklirnya dijadiin dwi fungsi, satu buat keperluan militer dan pembangkit listrk. jadinya ya mbledug karena gak stabil

[Ztar Kraftz]

Originally posted by sukalada
iya betul kondisi keamanan di indo... takutnya ada kerusuhan dan ada yg iseng ngebakar reaktor.. ;D

FYI.. reaktor nuklir di indo udah cukup banyak lho.. di serpong ama di Batan bandung.. ga tau tuh yg Batan kota laen tapi kayaknya punya..

itumah reaktor maenan, gak bisa buat apa-apaan dibanding di luar negeri. trus kalo mao aman, reaktornya taroh di tengah2 hutan irian aja, perusuh gak bakalan nyampe deh, matek duluan digigit macan

[Windy Reed]

Originally posted by sukalada
FYI.. reaktor nuklir di indo udah cukup banyak lho.. di serpong ama di Batan bandung.. ga tau tuh yg Batan kota laen tapi kayaknya punya..
OMG! ternyata selama 3 tahun ini saya sekolah satu kota ama reaktor nuklir ;D

[MightyAbrams]

Ada alternatif energi yg (mungkin gak sekuat nuklir) lain?

Kalo gua pernah baca diwebsite tentang tank masa depan Amerika, FCS (Future Combat System). Aduh gua lupa gmn.. tapi mereka bakal make batere sel matahari.

Tapi yg lucu, batere itu sangat kuat dan diisi ulangnya bukan dijemur diterik matahari. Tapi diisi ama stasiun pengisi tenaga matahari dari angkasa. Jadi diluar angkasa sana ada semacam satelit (Solar Power SAttelite-SPS) penyerap energi matahari diketinggian 36.000km (geostasioner), dan bisa menyerap 4 kali lipat lebih besar sinar matahari daripada tempat paling terik dibumi.

utk ngisinya, energi itu dirubah menjadi microwave (sumpah gua bingung maksudnya gimana ini..), terus di-beam-kan ke arah tank FCS dibumi sana. Dan oleh FCS gelombang microwave itu ditangkap dan dirubah menjadi energi listrik.

Kalo mau baca lebih lengkap ada di..
http://www.fas.org/man/dod-101/sys/land/docs/1fcs98.pdf

[Luagefak Stalker]

Originally posted by Ztar Kraftz


itu karena pusat pembangkit nuklirnya dijadiin dwi fungsi, satu buat keperluan militer dan pembangkit listrk. jadinya ya mbledug karena gak stabil

apakah meskipun hanya dijadiin pembangkit tenaga listrik menjamin reaktor itu ngaa akan meledak?

Originally posted by MightyAbrams


ah itu kan gara2 orang Rusia rada ndablek njaga reaktornya.. Lagian sekarang udah gak ada masalah kan?

namanya juga teknologi kan sekali2 rada kacau kan gak pa pa.. Makanya kalau bikin reaktor cari lokasi yg kalo meledug bikin gembira masyarakat..

Kantor Pusat PDI Perjuangan ato Gedung MPR/DPR contohnya.. Jgn diKantor Pusat RCTI.. soalnya kalo meledug kita semua gak bisa nonton World Cup.


nb: eh.. caranya bikin ikon aneh2 itu gimana sih?

yep itu pure human error setau gwa.....dan karena human error itu bisa terjadi setiap saat makanya gwa bilang ini bahaya....blom lagi kalo ada technical error?...siapa yg bisa menjamin kalo reaktor nuklir itu bebas error 100%...? meskipun ngaa meledak...ada leaknya kecil aja dah bahaya....

dan sapa bilang bekas ledakannya sekarang dah ngaa papa?....yg namanya radiasinya itu ngaa bakal bisa ilang....semakin kecil iyah....tapi dihapus 100% itu ngaa mungkin....

[Windy Reed]

Originally posted by MightyAbrams
utk ngisinya, energi itu dirubah menjadi microwave (sumpah gua bingung maksudnya gimana ini..), terus di-beam-kan ke arah tank FCS dibumi sana. Dan oleh FCS gelombang microwave itu ditangkap dan dirubah menjadi energi listrik.

Kalo mau baca lebih lengkap ada di..
http://www.fas.org/man/dod-101/sys/land/docs/1fcs98.pdf
yang ini, bukannya bisa ngakibatkan ionisasi atmosfir ? kalo gak salah malah bisa lebih serem daripada nuklir kan ?

bisa gini mah nggak usah pake tanknya lagi, tembakin aja microwave ke markas musuh, biar orangnya dimasak idup^2 didalem

[sukalada]

Originally posted by Luagefak Stalker


apakah meskipun hanya dijadiin pembangkit tenaga listrik menjamin reaktor itu ngaa akan meledak?



yep itu pure human error setau gwa.....dan karena human error itu bisa terjadi setiap saat makanya gwa bilang ini bahaya....blom lagi kalo ada technical error?...siapa yg bisa menjamin kalo reaktor nuklir itu bebas error 100%...? meskipun ngaa meledak...ada leaknya kecil aja dah bahaya....

dan sapa bilang bekas ledakannya sekarang dah ngaa papa?....yg namanya radiasinya itu ngaa bakal bisa ilang....semakin kecil iyah....tapi dihapus 100% itu ngaa mungkin....

apapun bisa berbahaya klo ditangani ama yg ga bisa...
dan emang bener ga semudah itu sisa ledakan nuklir ngilang tergantung dari waktu paruh bahannya (ada yg nyampe puluhan taun untuk jadi abis)

dan klo ga salah udah lumayan banyak negara di asia yg make PLTN...

[sukalada]

Originally posted by Ztar Kraftz


itumah reaktor maenan, gak bisa buat apa-apaan dibanding di luar negeri. trus kalo mao aman, reaktornya taroh di tengah2 hutan irian aja, perusuh gak bakalan nyampe deh, matek duluan digigit macan

hayah.. iseng banget bikin rektor maenan ;D...

reaktor itu banyak gunanya lho...kayak buat kedokteran, pertanian dan kapasitasnya masih kecil baru...
tapi klo yg di Serpong reaktornya gede banget (mirip danau katanya sih ;D)

[pegasus]

Originally posted by Windy Reed

OMG! ternyata selama 3 tahun ini saya sekolah satu kota ama reaktor nuklir ;D

lah,
kampus gua tetanggaan langsung ama BATAN,
;D

tapi, masa tempat sekecil itu ada reaktornya ?
atau jangan2 reaktornya ada di bawah tanah kali yah ?
;(

[Luagefak Stalker]

Originally posted by sukalada


apapun bisa berbahaya klo ditangani ama yg ga bisa...
dan emang bener ga semudah itu sisa ledakan nuklir ngilang tergantung dari waktu paruh bahannya (ada yg nyampe puluhan taun untuk jadi abis)

dan klo ga salah udah lumayan banyak negara di asia yg make PLTN...

ngaa mungkin bisa abis....
dari yg namanya paruh waktu itu adalah waktu yg dibutuhkan sampe radiasi itu tinggal setengah....
misal paruh waktunya sepuluh taun...
setelah 10 taun tersisa 50%
setelah 20 taun masi ada 25%
setelah 30 taun masi ada 12.5%
setelah 40 taun masi ada 6.25%
setelah 50 taun masi ada 3.125%
dan ini ngaa akan mungkin menjadi 0%
mendekati 0% iyah tapi ngaa mungkin jadi 0%....cobain aja bagi setengah terus....;D

[Ztar Kraftz]

Originally posted by Luagefak Stalker


ngaa mungkin bisa abis....
dari yg namanya paruh waktu itu adalah waktu yg dibutuhkan sampe radiasi itu tinggal setengah....
misal paruh waktunya sepuluh taun...
setelah 10 taun tersisa 50%
setelah 20 taun masi ada 25%
setelah 30 taun masi ada 12.5%
setelah 40 taun masi ada 6.25%
setelah 50 taun masi ada 3.125%
dan ini ngaa akan mungkin menjadi 0%
mendekati 0% iyah tapi ngaa mungkin jadi 0%....cobain aja bagi setengah terus....;D

abis sih emang kagak, tapi daya pancar radiasinya juga semakin mengecil sampai tidak berbahaya lagi bagi kesehatan manusia.

tapi kena radiasi sih ok juga, siapa tau bisa jadi x men sial sialnya jadi batman juga keren

[Ztar Kraftz]

Originally posted by Windy Reed

OMG! ternyata selama 3 tahun ini saya sekolah satu kota ama reaktor nuklir ;D

lu tenang aja lah, reaktor batan mah kaga bisa matiin orang. paling sial ya jadi mandul, kalo enggak lahirin anak camen

[Windy Reed]

Originally posted by Ztar Kraftz


abis sih emang kagak, tapi daya pancar radiasinya juga semakin mengecil sampai tidak berbahaya lagi bagi kesehatan manusia.

tapi kena radiasi sih ok juga, siapa tau bisa jadi x men sial sialnya jadi batman juga keren
ngomongin tuh di thread yang "making of a superhero" :D

kena radiasi mah paling cacat, kalo di komik keliatannya enak banget ya, kena radiasi jadi gitu, terusnya kenapa gak semua orang dievolusi paksa aja

[Luagefak Stalker]

Originally posted by Ztar Kraftz


abis sih emang kagak, tapi daya pancar radiasinya juga semakin mengecil sampai tidak berbahaya lagi bagi kesehatan manusia.

tapi kena radiasi sih ok juga, siapa tau bisa jadi x men sial sialnya jadi batman juga keren


berapa tahunkan itu?.....

Summary of Uranium Isotopes
(Isotope)(Percent in natural uranium) (No. of Protons) (No. of Neutrons) (Half-Life (in years))
Uranium-238 | 99.284 | 92 | 146 | 4.46 billion
Uranium-235 | 0.711 | 92 | 143 | 704 million
Uranium-234 | 0.0055 | 92 | 142 | 245,000

[Luagefak Stalker]

Bibliographic Entry Result
(w/surrounding text) Standardized
Result
Cutnell, John D. and Johnson, Kenneth W. Physics, 3rd edition. New York: Wiley, 1995, 1013. "Plutonium is the final product and has half-life of 24,100 yr" 24,100 year

"Plutonium" Microsoft Encarta 97 Encyclopedia. CD-ROM. Microsoft. 1993-1996. "The most important isotope, Pu-239, has a half life of 24,360 years" 24,360 year

Knapp, Brian. Nuclear Physics. United States: Atlantic Europe, 1996, 26. "Plutonium, a silvery metal with a half-life of 24,000 years" 24,000 year

Cleveland, J. M. The Chemistry of Plutonium. New York: Gordon & Beach, 1970: 57. "Pu-239, the more common isotope of Plutonium has a half life of 24,000 years" 24,000 year

IEER Plutonium Factsheet.
Institute for Energy and Environmental Research. "For instance, plutonium-239 has a half-life of 24, 110 years while plutonium-241 has a half-life of 14.4 years." 24,110 year
(Pu-239)

14.4 year
(Pu-241)

[E121F]

Originally posted by Luagefak Stalker



berapa tahunkan itu?.....

Summary of Uranium Isotopes
(Isotope)(Percent in natural uranium) (No. of Protons) (No. of Neutrons) (Half-Life (in years))
Uranium-238 | 99.284 | 92 | 146 | 4.46 billion
Uranium-235 | 0.711 | 92 | 143 | 704 million
Uranium-234 | 0.0055 | 92 | 142 | 245,000
hm...
cukup sampai umat manusia musnah ;D

[Ztar Kraftz]

Originally posted by Luagefak Stalker



berapa tahunkan itu?.....

Summary of Uranium Isotopes
(Isotope)(Percent in natural uranium) (No. of Protons) (No. of Neutrons) (Half-Life (in years))
Uranium-238 | 99.284 | 92 | 146 | 4.46 billion
Uranium-235 | 0.711 | 92 | 143 | 704 million
Uranium-234 | 0.0055 | 92 | 142 | 245,000

sabar aja deh, lagian nanti kalo udeh pake teknologi fusi nuklir, sampah radioaktivnya hampir nggak ada

[sukalada]

Originally posted by Luagefak Stalker



berapa tahunkan itu?.....

Summary of Uranium Isotopes
(Isotope)(Percent in natural uranium) (No. of Protons) (No. of Neutrons) (Half-Life (in years))
Uranium-238 | 99.284 | 92 | 146 | 4.46 billion
Uranium-235 | 0.711 | 92 | 143 | 704 million
Uranium-234 | 0.0055 | 92 | 142 | 245,000

makanya kalo saya pakenya yg irit-irit aja waktunya.. kayak:
Tecnetium-99m : 360 minutes

atau isotop sejenis carbon 13 yg T setengahnya dlm itungan detik... :D

[Windy Reed]

kalo yang half life-nya sesingkat itu, apa ada yang unsurnya juga cukup efisien buat dipake di reaktor ?
yang saya inget, dipake U-235 (bukan U-236 yang lebih banyak) itu karena lebih stabil jadinya gampang kebeleh kan ? kalo kayak C-13 apa bisa gampang ? sama^2 radioaktif sih

[Luagefak Stalker]

Originally posted by Ztar Kraftz


sabar aja deh, lagian nanti kalo udeh pake teknologi fusi nuklir, sampah radioaktivnya hampir nggak ada

koq gwa ngebaca kata "hampir" itu ngaa begitu seneng yah...;D

[sukalada]

Originally posted by Windy Reed
kalo yang half life-nya sesingkat itu, apa ada yang unsurnya juga cukup efisien buat dipake di reaktor ?
yang saya inget, dipake U-235 (bukan U-236 yang lebih banyak) itu karena lebih stabil jadinya gampang kebeleh kan ? kalo kayak C-13 apa bisa gampang ? sama^2 radioaktif sih

kayaknya enggak tuh.. rugi lah kalo musti beli bahan terus menerus... enaknya kan sekali beli bisa tahan cukup lama...

yg halflife singkat biasanya dipakai buat penanda doang...

[Windy Reed]

karena tahan lama toh ? ;D

[E121F]

C 13? apa nggak terlalu ringan untuk reaksi fisi?

[bébé]

Originally posted by Luagefak Stalker


apakah meskipun hanya dijadiin pembangkit tenaga listrik menjamin reaktor itu ngaa akan meledak?



yep itu pure human error setau gwa.....dan karena human error itu bisa terjadi setiap saat makanya gwa bilang ini bahaya....blom lagi kalo ada technical error?...siapa yg bisa menjamin kalo reaktor nuklir itu bebas error 100%...? meskipun ngaa meledak...ada leaknya kecil aja dah bahaya....

dan sapa bilang bekas ledakannya sekarang dah ngaa papa?....yg namanya radiasinya itu ngaa bakal bisa ilang....semakin kecil iyah....tapi dihapus 100% itu ngaa mungkin....

Mungkin belon pernah denger akibat ledakan chernobyl ya...sekitar 15000 scientist Rusia yang ikut pembersihan reaktor pada tahun 1986 itu , hampir separuhnya meninggal 4 tahun kemudian....tidak ada data resmi karena rusia gak mengakui...
pembersihan itu terjadi untuk mencari bekas-bekas uraniumnya....
yang ternyata sudah membeku..

Teknologi Nuklir ternyata udah dibayar sangat mahal oleh jiwa manusia

[Ztar Kraftz]

Originally posted by Luagefak Stalker


koq gwa ngebaca kata "hampir" itu ngaa begitu seneng yah...;D

hahaha, di dunia ini mana ada yang sempurna

[Windy Reed]

karena "hampir" tuh kan jawaban aman seandainya ada yang meleset

[E121F]

bukannya lebih tepat dijawab :
"semua itu relatif"

[Ztar Kraftz]

Originally posted by Windy Reed
karena "hampir" tuh kan jawaban aman seandainya ada yang meleset

hahahahaha, betul sekali pendapatlu itu. sip . tapi karena "hampir", maka yang meleset juga kecil

[Luagefak Stalker]

Originally posted by Ztar Kraftz


hahahahaha, betul sekali pendapatlu itu. sip . tapi karena "hampir", maka yang meleset juga kecil

meskipun kecil tapi kalo lawannya nuklir yah tetep aja fatal.....

[Ztar Kraftz]

tenang aja, gak bakalan kerasa deh, lu pasti langsung game over

[Luagefak Stalker]

yee.......makanya......

[E121F]

death in T - x second, where limit x -> 0 :D

[Ztar Kraftz]

Originally posted by E121F
death in T - x second, where limit x -> 0 :D

apa maksud lu ?

[Windy Reed]

in common language: mati dalam sekejap

[Ztar Kraftz]

mending tau, daripada mati perlahan lahan karena radiasi

[E121F]

yup!

[4nd1]

kenapa ngga dimasukkin ke roket, trus arahin ke matahari. Lenyap semua sampahnya (kecuali kalau something goes wrong waktu peluncurannya ;D)

[sukalada]

Originally posted by 4nd1
kenapa ngga dimasukkin ke roket, trus arahin ke matahari. Lenyap semua sampahnya (kecuali kalau something goes wrong waktu peluncurannya ;D)

wah ga mungkin tuh kayaknya..
biaya ngebuangnya lebih mahal dibanding keuntungannya... ;D

[Windy Reed]

kenapa gak buang ke yang kayak gunung berapi aja ?
taunya ntar planet kita tambah panas karena tambah fungsi jadi tempat pembakaran sampah ;D

[Ztar Kraftz]

Originally posted by sukalada


wah ga mungkin tuh kayaknya..
biaya ngebuangnya lebih mahal dibanding keuntungannya... ;D

kalo mau lebih murah sih bisa aja tinggalin sampahnya di luar angkasa, biar melayang2 sendiri, kan lama 2 ilang sendiri

[omi]

gimana kl secara tidak sengaja bertabrkan dengan satelit buatan?
Atau bertabrakan dengan meteorit nyasar misalnya?

[Windy Reed]

mending kalau meledak, gimana kalo waktu lagi kebakar itu limbahnya kedorong ke atmosfir ? apa gak global disaster ;D

air pendingin reaktor yang bekas itu buangnya gimana sih ?

[E121F]

Originally posted by Windy Reed
mending kalau meledak, gimana kalo waktu lagi kebakar itu limbahnya kedorong ke atmosfir ? apa gak global disaster ;D

air pendingin reaktor yang bekas itu buangnya gimana sih ?
air pendingin bukannya ntar dimasukin kompresor, terus jadi dingin lagi? ::bentar2:

[Ztar Kraftz]

Originally posted by Windy Reed
mending kalau meledak, gimana kalo waktu lagi kebakar itu limbahnya kedorong ke atmosfir ? apa gak global disaster ;D

air pendingin reaktor yang bekas itu buangnya gimana sih ?

betul juga ya

[Ztar Kraftz]

Originally posted by E121F

air pendingin bukannya ntar dimasukin kompresor, terus jadi dingin lagi? ::bentar2:

emang begitu ya ? gue baru tau tuh

[E121F]

Originally posted by Ztar Kraftz


emang begitu ya ? gue baru tau tuh
maksudnya reaktor nuklir kan?
ya emang begitu
masih *fresh* di otak gue :D, baru aja cawu 3 ini ulg radioaktifitas

[Windy Reed]

emang air pendingin itu dipake terus sepanjang umur reaktor ?

terus kalo mau perawatan bagian dalam itu gimana sih ? musti ada maintenance juga kan reaktor nuklir, biar gak cepet rusak. Kayaknya onderdil ada yang musti diganti. Itu barang bekas dibuang gimana ?

[E121F]

Originally posted by Windy Reed
emang air pendingin itu dipake terus sepanjang umur reaktor ?

terus kalo mau perawatan bagian dalam itu gimana sih ? musti ada maintenance juga kan reaktor nuklir, biar gak cepet rusak. Kayaknya onderdil ada yang musti diganti. Itu barang bekas dibuang gimana ?
errrr
syarat2 air pendingin gue gak tau banyak ;D
IMO airnya bisa dipake terus tuh, asal volumenya kagak berkurang aja

perawatan dalemnya? masukin aja semua batang pengendalinya kedalem supaya semua neutron 'peluru' diserap
abis itu nggak ada pembelahan fisi lagi kan?

abis itu....
maybe it save to enter it ;D
gue gak tau uraniumnya itu sendiri radio aktif gak ;D

[Ztar Kraftz]

Originally posted by E121F

maksudnya reaktor nuklir kan?
ya emang begitu
masih *fresh* di otak gue :D, baru aja cawu 3 ini ulg radioaktifitas

hahaha, lu ma masuk teknik nuklir ya ?

[E121F]

nggak
baru mo masuk 3 ipa koq :P

[Ztar Kraftz]

Originally posted by E121F
nggak
baru mo masuk 3 ipa koq :P

bukannya radioaktifitas awal kelas 3 ipa ??

[E121F]

Originally posted by Ztar Kraftz


bukannya radioaktifitas awal kelas 3 ipa ??
gue belom liat buku kls 3
tapi yang pasti radioaktifitas juga ada di pelajaran fisika dan kimia akhir cawu 3

[Ztar Kraftz]

berarti gue yang lupa hahahaha