Since 1989 the nuclear-powered icebreakers have also been used for tourist purposes carrying passengers to the North Pole. Each participant pays up to US$ 25,000 for a cruise lasting three weeks. The NS Sibir was used for the first two tourist cruises in 1989 and 1990. In 1991 and 1992, the tourist trips to the North Pole were undertaken by NS Sovyetski Soyuz . During the summer of 1993 the NS Yamal was used for three tourist expeditions in the Arctic . The NS Yamal has a separate accommodation section for tourists. The nuclear-powered icebreaker 50 Let Pobedy (known in English as the 50 Years of Victory ) contains an accommodation deck customised for tourists.
The International Atomic Energy Agency (IAEA) commenced a review and revision cycle in 2015 for the regulations and advisory material concerning the transport of radioactive material. Following notification from the IAEA ( Note Verbale ) and in consultation with the GB Stakeholders, we put forward the following UK proposals and formed a GB position on each of the other Member State’s proposals. We also produced a position paper on two specific proposals that seek to change IAEA SSR-6  with respect to dose rate allowable increases following Normal Conditions of Transport
It was shown, in fungi that undergo closed mitosis (where the nucleus does not disassemble), that the change of the permeability barrier of the NE was due to changes within the NPC and is what allows the entry of mitotic regulators. In Aspergillus nidulans NPC composition appears to be effected by the mitotic kinase NIMA, possibly by phosphorylating the nucleoporins Nup98 and Gle2/Rae1. This remodelling seems to allow the protein complex cdc2/cyclinB to enter the nucleus as well as many other proteins, such as soluble tubulin. The NPC scaffold remains intact throughout the whole closed mitosis. This seems to preserve the integrity of the NE.