Iran runs simulations on bomb that would dwarf Hiroshima
VIENNA — Iranian scientists have run computer simulations for a nuclear weapon that would produce more than triple the explosive force of the World War II bomb that destroyed Hiroshima, according to a diagram obtained by The Associated Press.
The diagram was leaked by officials from a country critical of Iran's atomic program to bolster their arguments that Iran's nuclear program must be halted before it produces a weapon. The officials provided the diagram only on condition that they and their country not be named.
The International Atomic Energy Agency — the Vienna-based U.N. nuclear watchdog — reported last year that it had obtained diagrams indicating that Iran was calculating the “nuclear explosive yield” of potential weapons. A senior diplomat who is considered neutral on the issue confirmed that the graph obtained by the AP was indeed one of those cited by the IAEA in that report. He spoke only on condition of anonymity.
The IAEA report mentioning the diagrams last year did not give details of what they showed. But the diagram seen by the AP shows a bell curve — with variables of time in micro-seconds, and power and energy both in kilotons — the traditional measurement of the energy output, and hence the destructive power of nuclear weapons. The curve peaks at just above 50 kilotons at around 2 microseconds, reflecting the full force of the weapon being modeled.
The bomb that the United States dropped on Hiroshima in Japan during World War II, in comparison, had a force of about 15 kilotons. Modern nuclear weapons have yields hundreds of times higher than that.
The diagram has a caption in Farsi: “Changes in output and in energy released as a function of time through power pulse.” The number “5” is part of the title, suggesting it is part of a series.
David Albright, whose Institute for Science and International Security is used by the U.S. government as a go-to source on Iran's nuclear program, said the diagram looks genuine but seems to be designed more “to understand the process” than as part of a blueprint for an actual weapon in the making.
“The yield is too big,” Albright said, noting that North Korea's first tests of a nuclear weapon were only a few kilotons. Because the graph appears to be only one in a series, others might show lower yields, closer to what a test explosion might produce, he said.
The senior diplomat said the diagram was part of a series of Iranian computer-generated models provided to the IAEA by the intelligence services of member nations for use in its investigations of suspicions that Iran is trying to produce a nuclear weapon. Iran denies any interest in such a weapon and has accused the United States and Israel of fabricating evidence that suggests it is trying to build a bomb.
Asked about the project, Iran's chief IAEA delegate, Ali Asghar Soltanieh, said he had not heard of it. IAEA spokeswoman Gill Tudor said the agency had no comment.
Iran has refused to halt uranium enrichment, despite offers of reactor fuel from abroad, saying it is producing nuclear fuel for civilian uses. It has refused for years to cooperate with the U.N. nuclear agency's efforts to investigate its program.
Iran's critics fear it could use the enriched uranium for military purposes. Such concerns grew this month when the IAEA said Iran is poised to double its output of higher-enriched uranium at its fortified underground facility — a development that could put Tehran within months of being able to make the core of a nuclear warhead.
In reporting on the existence of the diagrams last year, the IAEA said it had obtained them from two member nations that it did not identify. Other diplomats have said that Israel and the United States — the countries most concerned about Iran's nuclear program — have supplied the bulk of intelligence being used by the IAEA in its investigation.
“The application of such studies to anything other than a nuclear explosive is unclear to the agency,” the IAEA said at the time.
The models were allegedly created in 2008 and 2009 — well after 2003, the year that the United States said Tehran had suspended such work in any meaningful way. That date has been questioned by Britain, France, Germany and Israel, and the IAEA now believes that — although Iran shut down some of its work back then — other tests and experiments continue today.
With both the IAEA probe and international attempts to engage Iran stalled, there are fears that Israel may opt to strike at Tehran's nuclear program.
An intelligence summary provided with the drawing linked it to other alleged nuclear weapons work — significant because it would indicate that Iran is working not on isolated experiments, but rather on a single program aimed at mastering all aspects of nuclear arms development.
Show commenting policy
TribLive commenting policy
You are solely responsible for your comments and by using TribLive.com you agree to our Terms of Service.
We moderate comments. Our goal is to provide substantive commentary for a general readership. By screening submissions, we provide a space where readers can share intelligent and informed commentary that enhances the quality of our news and information.
While most comments will be posted if they are on-topic and not abusive, moderating decisions are subjective. We will make them as carefully and consistently as we can. Because of the volume of reader comments, we cannot review individual moderation decisions with readers.
We value thoughtful comments representing a range of views that make their point quickly and politely. We make an effort to protect discussions from repeated comments either by the same reader or different readers.
We follow the same standards for taste as the daily newspaper. A few things we won't tolerate: personal attacks, obscenity, vulgarity, profanity (including expletives and letters followed by dashes), commercial promotion, impersonations, incoherence, proselytizing and SHOUTING. Don't include URLs to Web sites.
We do not edit comments. They are either approved or deleted. We reserve the right to edit a comment that is quoted or excerpted in an article. In this case, we may fix spelling and punctuation.
We welcome strong opinions and criticism of our work, but we don't want comments to become bogged down with discussions of our policies and we will moderate accordingly.
We appreciate it when readers and people quoted in articles or blog posts point out errors of fact or emphasis and will investigate all assertions. But these suggestions should be sent via e-mail. To avoid distracting other readers, we won't publish comments that suggest a correction. Instead, corrections will be made in a blog post or in an article.
- Pirates’ outfield may have few defensive peers
- Penguins’ Letang leaves hospital, out with concussion
- Penguins slip past Sharks, 3-2, in shootout
- Sex-soaked culture faulted for fraternity house parties
- Carnegie Mellon University’s Speck device monitors indoor pollution
- Hempfield infant fights rare disease
- Researchers uncover details to help get GOP candidates elected
- NFL coaches weigh in on Polamalu’s legacy
- LaBar: WrestleMania 31 one of the best ever
- Penguins notebook: Five defensemen dress against San Jose
- New Kensington resident looks to transform city