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  • #31
    VIENNA (AP) - A senior U.N. nuclear agency team will visit Tehran on Jan. 28 with Iran saying it is ready to discuss allegations that it was involved in secret nuclear weapons work after years of refusing to do so, diplomats said Thursday.

    Diplomats have previously said that International Atomic Energy Agency officials were discussing such a trip with their Iranian counterparts. But before the diplomats' comments Thursday, no date - or indication that Iran was ready to talk about the allegations - had been mentioned.

    Any follow-through on the part of Iran on its reported pledge to discuss nuclear arms suspicions would be significant.

    For more than three years, Tehran has blocked IAEA attempts to follow up on U.S. and other intelligence alleging covert Iranian work on nuclear arms, dismissing the charges as baseless and insisting all its nuclear activities were peaceful and under IAEA purview.


    Faced with Iranian stonewalling, the IAEA summarized its body of information in November, in a 13-page document drawing on 1,000 pages of intelligence. It stated then for the first time that some of the alleged experiments can have no other purpose than developing nuclear weapons.

    Iran continues to deny the charges and no change in its position is expected during the Tehran talks with IAEA officials. But even a decision to enter a discussion over the allegations would be a major departure from outright refusal to talk about them - and create hopes of future progress in the investigation.

    Two diplomats told The Associated Press that Iranian officials had suggested they were ready to talk about the issue during recent meetings with officials of the Vienna-based IAEA. They asked for anonymity because their information was confidential.

    Ali Asghar Soltanieh, Iran's chief IAEA delegate, declined to be drawn on what would be discussed in Tehran, indicating in comments to The AP that it was too early to go public with details.

    The composition of the IAEA team, as described by one of the diplomats, also reflects the significance the U.N. nuclear monitoring agency attaches to the visit, which is expected to conclude in the first few days of February.

    Normally such trips are made by Deputy Director General Herman Nackaerts, in charge of the Iran nuclear file, and more junior officials of his department. But the diplomat said that this time Nackaerts will be accompanied by Assistant Director General Rafael Grossi, the right-hand to IAEA chief Yukiya Amano, and Peri Lynne Johnson, the agency's senior legal official.

    Johnson is the only American among the three. While IAEA officials are formally neutral, her citizenship is of potential significance considering the high tension-level between Washington and Tehran.

    Beyond the dispute over Iran's nuclear intentions, U.S.-Iranian relations have been further burdened by an Iranian announcement that a joint U.S.-Iranian national will be executed after being found guilty of spying - a charge both he and Washington denies.

    Iran, in turn, sees possible U.S. complicity in a series of assassinations of its nuclear experts - the latest Wednesday, when scientist Mostafa Ahmadi Roshan was killed by a bomb attached to his car by a passing bicyclist.

    In a letter to the U.N. secretary-general on Thursday, Iran's U.N. Ambassador Mohammad Khazaee called on the U.N. to condemn the killing and two earlier attacks that left two nuclear scientists dead and another seriously injured.

    "There is firm evidence that certain foreign quarters are behind such assassinations. As has been claimed by these circles, such terrorist acts have been carried out as part of the efforts to disrupt Iran's peaceful nuclear program, under the false assumption that diplomacy alone would not be enough for that purpose," the letter read in part.

    U.S. Secretary of State Hillary Rodham Clinton denied any U.S. role in the slaying and the U.S administration condemned the attacks. Israeli officials, in contrast, have hinted at covert campaigns against Iran without directly admitting involvement.

    Beyond urging Iranian cooperation with the IAEA probe of the alleged weapons work, the U.S. and its allies are pressuring Iran to halt uranium enrichment, a key element of the nuclear program that dozens of nations suspect is aimed at producing atomic weapons. Uranium enriched to low levels can be used as nuclear fuel, but at higher levels it can be used as material for a nuclear warhead.

    Iran denies it is trying to make nuclear weapons, saying its program is for peaceful purposes only and is geared toward generating electricity.

    Those claims were called into question on Monday when the IAEA confirmed Iran had begun enriching uranium to 20 percent. That's a significantly higher concentration than the nation's main stockpile - and can be turned into weapons grade material more quickly than the lower enriched uranium

    iWon News - APNewsBreak: UN visit to Tehran set for Jan 28
    Fortitude.....The strength to persist...The courage to endure.

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    • #32
      LEU
      Low-enriched uranium. Uranium enriched to an assay of less than 20 percent. LEU typically has a 3 to 5 percent assay when used as fuel for nuclear reactors.


      HEU
      Highly enriched uranium. Uranium enriched to an assay of 20 percent or more. For military application, this enrichment level may exceed 90 percent.


      http://www.usec.com/glossary.htm
      Fortitude.....The strength to persist...The courage to endure.

      Comment


      • #33
        The 5MW research reactor in Teheran needs ~20 % purity. It used to run on 93% stuff..

        ISIS NuclearIran › Nuclear Sites › Facilities › Tehran Research Reactor (TRR)

        Originally posted by Dreadnought View Post
        No, the problem is Iran stated it was for medical isotopes and power generation. What they are claiming to produce at 20% enrichment is weapons grade not medical grade which would not require no where near that amount of enrichment.

        That is the problem and their vlagrant violation of the NPT.

        Comment


        • #34
          Originally posted by mustavaris View Post
          The 5MW research reactor in Teheran needs ~20 % purity. It used to run on 93% stuff..

          ISIS NuclearIran › Nuclear Sites › Facilities › Tehran Research Reactor (TRR)
          It still does not take away from the fact that medical isotopes require alot less as they stated themselves that was the purpose of their enrichment. Iran had deals to exchange its reactor fuel rods safely and openly with Russia. The ones that built their reactors and blew it off. It is the Iranians and their regime that caused this suspicion and it is the Iraninas that barred the IAEA from inspection views while they continued to build enrichment facilities.

          They signed the Treaty and chose not to honor it. They caused this problem and their regimes rhetoric over wiping countries off the globe only led to the postion they are in now. That and thinking for a moment the could close the Straits and deny international traffic access without meeting a certain and swift reply from world naval forces. One which they WILL no doubt lose.

          Yeah, they can be trusted.

          And for all we know that scientist might not even be dead but claimed to be to further support Iran being attacked by "outside" nations.
          Last edited by Dreadnought; 12 Jan 12,, 23:00.
          Fortitude.....The strength to persist...The courage to endure.

          Comment


          • #35
            It was ross.

            Comment


            • #36
              It was me, I admitted it! Why won't anyone take me seriously?! :pari:
              Meddle not in the affairs of dragons, for you are crunchy and taste good with ketchup.

              Abusing Yellow is meant to be a labor of love, not something you sell to the highest bidder.

              Comment


              • #37
                Originally posted by bigross86 View Post
                It was me, I admitted it! Why won't anyone take me seriously?! :pari:
                Can't be you. You are too busy fighting Orthodox Jews.
                No such thing as a good tax - Churchill

                To make mistakes is human. To blame someone else for your mistake, is strategic.

                Comment


                • #38
                  I'm good at multitasking?
                  Meddle not in the affairs of dragons, for you are crunchy and taste good with ketchup.

                  Abusing Yellow is meant to be a labor of love, not something you sell to the highest bidder.

                  Comment


                  • #39
                    You should master at multiplying.
                    No such thing as a good tax - Churchill

                    To make mistakes is human. To blame someone else for your mistake, is strategic.

                    Comment


                    • #40
                      I'm allergic to numbers...
                      Meddle not in the affairs of dragons, for you are crunchy and taste good with ketchup.

                      Abusing Yellow is meant to be a labor of love, not something you sell to the highest bidder.

                      Comment


                      • #41
                        Originally posted by Doktor View Post
                        What is the life expactancy of nuclear engineer in Iran these days?
                        Longer on Friday evening at home than on Monday morning on their way to work apparently.

                        Comment


                        • #42
                          Originally posted by Aryajet View Post
                          Dave,
                          Newly established and elected Muslim Arab Iraqi Gov. was/is in IRI sphere of influence and would never give clearance to IDF to over fly their aerospace and if U.S wanted to by pass that major obstacle then had no choice but dissolve a Gov. which had sacrificed 1000's of American lives on top of spending over $ trillion to establish.

                          In case of IDF the passage over Iraq and KSA northern borders would make the best route.
                          No, I understand. I was alluding to the time frame where we had control of the entire airspace over Iraq before the new goverment took over.

                          I think at the current time with the way Iran and the new Iraqi government have been getting along I think it would cause more harm then good all the way around.

                          I figured a sea approach. What say you brother!

                          Comment


                          • #43
                            Those little research reactors normally used HEU as built, they are quite simple as far as reactors go - downgrading to 20% would have made the core a lot bigger (the original 93% core was probably similar in size to a 40 gallon garbage can), and essentially would have been a whole new reactor. These were not power reactors, they were used mainly to produce isotopes or do neutron studies or neutron materials analysis. The power was normally disappated with heat exchangers operating like big radiators - just dumping the energy into the air as heat. I doubt there was any kind of electrical generator associated with the reactor. After operating for years, the spent uranium core would not have been weapons grade, but would be loaded with impurities which would make it useless for weapons. Normal power reactors use LEU, so making HEU does not fit with their story - the medical isotopes are not even uranium - they are fission products - any reactor can produce them. They either want to produce nuclear weapons or nuclear submarine reactors if they are making HEU. I would bet on the weapons plan.
                            sigpic"If your plan is for one year, plant rice. If your plan is for ten years, plant trees.
                            If your plan is for one hundred years, educate children."

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                            • #44
                              So to summarize for us non-nuclear scientists... ;)

                              4% U-235 is good for power plants
                              20% is used to make radioisotopes and for general research

                              Neither of the above can make a bomb

                              90% HEU and up can make a Little Boy bomb, yet the Iranian reactor cannot work with less than 90%? What's up with that? What kind of idiots would make a reactor that requires bomb-grade material?

                              Comment


                              • #45
                                Originally posted by Chogy View Post
                                So to summarize for us non-nuclear scientists... ;)

                                4% U-235 is good for power plants
                                20% is used to make radioisotopes and for general research

                                Neither of the above can make a bomb

                                90% HEU and up can make a Little Boy bomb, yet the Iranian reactor cannot work with less than 90%? What's up with that? What kind of idiots would make a reactor that requires bomb-grade material?
                                It seems that a very small installation was desired for universities - the HEU research reactor was the solution - one type was called TRIGA. We had one in Madison, the core was rectanglar and about the size of a 40 gallon garbage can - it was clearly visible at the bottom of the cooling pool and had blade type control plates that segregated it into 4 sections. At full power it had an unearthly blue Cherenkov radiation glow - that lit up the entire containment building. These reactors were built in the late 50's and 60's. Appearently proliferation was not a concern? I often wondered about this myself - it was scary to think of the possibilities.

                                TRIGA® Nuclear Reactors
                                This picture shows what the glow looked like, but has different control mechanisms- the more common rod types (the black things protruding from the top, they can be gravity operated in the event of a power failure - provided the core isn't too hot and hasn't expanded to exclude them). These serve to absorb neutrons and supress the reactions.

                                This is the outside of the reactor - it is essentially a concrete silo filled with water, the core is at the bottom.
                                Nuclear Reactor Laboratory « UW-Madison Photo Library
                                Attached Files
                                Last edited by USSWisconsin; 13 Jan 12,, 16:15.
                                sigpic"If your plan is for one year, plant rice. If your plan is for ten years, plant trees.
                                If your plan is for one hundred years, educate children."

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