A Western diplomat and an independent nuclear expert who follow the Vienna-based U.N. International Atomic Energy Agency (IAEA) told Reuters the radiation detection device -- called a ``whole body counter'' -- was identified as having been made by the Connecticut-based firm Canberra Industries, Inc. The disclosure could prove embarrassing to Washington which has accused Iran of pursuing a nuclear weapons program and has called on countries to crack down on exports of even seemingly innocent machinery that could be used in weapons programs. Tehran says it only wants nuclear power for electricity. ``There is no doubt that the whole-body counter came from Canberra Industries and under a legal export,'' said the nuclear science expert, who has analyzed satellite images of the site taken by the U.S. firm DigitalGlobe's Quickbird satellite. The counter, used to measure radiation contamination in humans, was sold directly to a university or hospital in Iran in the early 1990s with a U.S. export license, the sources said. The device was seen at Lavizan, situated near a military installation in Tehran. Satellite images of Lavizan show Tehran razed buildings and removed a significant amount of topsoil. Ironically, the U.S.-made device is the reason U.S. officials are convinced Iran pursued undeclared atomic activity there. ``The presence of the whole body counter there is weird and out of place, but it doesn't prove that there was any weapons activity going on at Lavizan,'' said David Albright, president of the Institute for Science and International Securityand a former U.N. weapons inspector. ``We need to know how it got there (from the hospital or university) and why,'' he added. Lavizan was first mentioned in May 2003, when a group of Iranian exiles said it was a biological weapons research site. Iran vehemently denied that it has conducted any undeclared nuclear or weapons-related activities at Lavizan. But a diplomat close to the IAEA said inspectors would go there ``very soon.'' NEW DEMOLITION WORK AT SUSPECT SITE Canberra Industries declined to comment, but an industry source familiar with devices like whole-body counter said it was a ``totally innocuous'' device designed for peaceful activity. Asked if the counter could be modified to detect plutonium or other substances to make it usable in weapons-related activity, the source, who declined to be identified, said: ``Very theoretically speaking, all kinds of things can be done,'' the source said. Last week, Reuters obtained from ISIS and GlobalDigital two satellite photos taken in August 2003 and March 2004 that showed Iran had dismantled buildings and removed rubble and topsoil at the site, called the Lavizan-Shiyan Technical Research Center. The U.S. ambassador to the IAEA, Kenneth Brill, accused Iran of using ``the wrecking ball and bulldozer'' to sanitize Lavizan prior to the arrival of U.N. inspectors. ``This destruction at the site raised concerns because it is the type of measure Iran would need to take if it was trying to defeat the powerful environmental sampling capabilities of IAEA inspectors,'' ISIS said in an analysis of the images. Last week the IAEA Board of Governors unanimously passed a resolution that sharply rebuked Iran for not cooperating fully with a U.N. investigation of Tehran's nuclear program. The IAEA began investigating Iran after an Iranian exile group reported in August 2002 that Tehran was hiding a massive uranium enrichment facility and other sites from the IAEA.

The disclosure could prove embarrassing to Washington which has accused Iran of pursuing a nuclear weapons program and has called on countries to crack down on exports of even seemingly innocent machinery that could be used in weapons programs.

Tehran says it only wants nuclear power for electricity.

``There is no doubt that the whole-body counter came from Canberra Industries and under a legal export,'' said the nuclear science expert, who has analyzed satellite images of the site taken by the U.S. firm DigitalGlobe's Quickbird satellite.

The counter, used to measure radiation contamination in humans, was sold directly to a university or hospital in Iran in the early 1990s with a U.S. export license, the sources said.

The device was seen at Lavizan, situated near a military installation in Tehran. Satellite images of Lavizan show Tehran razed buildings and removed a significant amount of topsoil. Ironically, the U.S.-made device is the reason U.S. officials are convinced Iran pursued undeclared atomic activity there.

``The presence of the whole body counter there is weird and out of place, but it doesn't prove that there was any weapons activity going on at Lavizan,'' said David Albright, president of the Institute for Science and International Securityand a former U.N. weapons inspector.

``We need to know how it got there (from the hospital or university) and why,'' he added.

Lavizan was first mentioned in May 2003, when a group of Iranian exiles said it was a biological weapons research site.

Iran vehemently denied that it has conducted any undeclared nuclear or weapons-related activities at Lavizan. But a diplomat close to the IAEA said inspectors would go there ``very soon.''

NEW DEMOLITION WORK AT SUSPECT SITE

Canberra Industries declined to comment, but an industry source familiar with devices like whole-body counter said it was a ``totally innocuous'' device designed for peaceful activity.

Asked if the counter could be modified to detect plutonium or other substances to make it usable in weapons-related activity, the source, who declined to be identified, said:

``Very theoretically speaking, all kinds of things can be done,'' the source said.

Last week, Reuters obtained from ISIS and GlobalDigital two satellite photos taken in August 2003 and March 2004 that showed Iran had dismantled buildings and removed rubble and topsoil at the site, called the Lavizan-Shiyan Technical Research Center.

The U.S. ambassador to the IAEA, Kenneth Brill, accused Iran of using ``the wrecking ball and bulldozer'' to sanitize Lavizan prior to the arrival of U.N. inspectors.

``This destruction at the site raised concerns because it is the type of measure Iran would need to take if it was trying to defeat the powerful environmental sampling capabilities of IAEA inspectors,'' ISIS said in an analysis of the images.

Last week the IAEA Board of Governors unanimously passed a resolution that sharply rebuked Iran for not cooperating fully with a U.N. investigation of Tehran's nuclear program.

The IAEA began investigating Iran after an Iranian exile group reported in August 2002 that Tehran was hiding a massive uranium enrichment facility and other sites from the IAEA.