Observers from Earth can see two types of eclipses â eclipses of the Sun (solar eclipses), and eclipses of the Moon (lunar eclipses). These occur when the Sun, Earth and Moon align in a straight or almost straight configuration.
The Tehran Research Reactor (TRR) is a 5 megawatt-thermal (MWth) pool-type light water research reactor. The United States supplied the TRR to Iran in 1967 and weapon-grade uranium fuel for the reactor.The International Atomic Energy Agency (IAEA) inspects this reactor.ithout notifying the IAEA Iran irradiated uranium oxide (UO2) targets in the TRR and separated plutonium in glove boxes at Tehran Nuclear Research Center (TNRC) laboratories. Iran also admitted to producing small amounts of polonium-210 in the TRR in the early 1990s through the irradiation of bismuth targets.
Transuranic waste (TRU) is, as stated by U.S. regulations and independent of state or origin, waste which has been contaminated with alpha emitting transuranic radionuclides possessing half-lives greater than 20 years and in concentrations greater than 100 nCi /g (3.7 MBq /kg).H TRU has a surface dose rate not greater than 2 mSv per hour (200 mrem /h), whereas RH TRU has rates of 2 mSv/h or higher. CH TRU has neither the high radioactivity of high level waste, nor its high heat generation.