An analysis device (10) for the detection of fission products by measurement of a radioactivity includes a first line (12) for carrying a liquid sample, a first detector (17) connected to the first line (12) and designed for measuring the radioactivity of fission products contained in the liquid sample, a second line (23) for carrying a gas sample and a second detector (29) connected to the second line (23) and designed for measuring the radioactivity of fission products contained in the gas sample. The analysis device includes a separation device (18) for separating gas from the first line (12) carrying the liquid sample, which line has an outlet opening into the second line (23) for removed gas in such a manner that the removed gas can be supplied as a gas sample to the first detector (17) for measuring the radioactivity of fission products contained therein.

An analysis device (10) for the detection of fission products by measurement of a radioactivity includes a first line (12) for carrying a liquid sample, a first detector (17) connected to the first line (12) and designed for measuring the radioactivity of fission products contained in the liquid sample, a second line (23) for carrying a gas sample and a second detector (29) connected to the second line (23) and designed for measuring the radioactivity of fission products contained in the gas sample. The analysis device includes a separation device (18) for separating gas from the first line (12) carrying the liquid sample, which line has an outlet opening into the second line (23) for removed gas in such a manner that the removed gas can be supplied as a gas sample to the first detector (17) for measuring the radioactivity of fission products contained therein.

A head module for a large-scale container, a large-scale container having the head module, and methods for manufacturing the head module and the large-scale container. The method for manufacturing a head module comprises providing a head having an annular opening, the head being composed of a plurality of petals, providing a plurality of cylinder plates, and forming a head cylindrical ring, connecting in order the plurality of cylinder plates to the end surface of the annular opening and joining facing sides of all adjacent cylinder plates. Based on the unfitness of the petals at the annular opening of the head, gaps between adjacent cylinder plates may be adjusted, and/or the positions of the cylinder plates on the end surface of the annular opening of the head may be adjusted radially inwards or outwards.

A head module for a large-scale container, a large-scale container having the head module, and methods for manufacturing the head module and the large-scale container. The method for manufacturing a head module comprises providing a head having an annular opening, the head being composed of a plurality of petals, providing a plurality of cylinder plates, and forming a head cylindrical ring, connecting in order the plurality of cylinder plates to the end surface of the annular opening and joining facing sides of all adjacent cylinder plates. Based on the unfitness of the petals at the annular opening of the head, gaps between adjacent cylinder plates may be adjusted, and/or the positions of the cylinder plates on the end surface of the annular opening of the head may be adjusted radially inwards or outwards.

A material (e.g., an alloy) comprises molybdenum, rhenium, and at least one element selected from the group consisting of tellurium, iodine, selenium, chromium, nickel, copper, titanium, zirconium, tungsten, vanadium, and niobium. Methods of forming the material (e.g., the alloy) comprise mixing molybdenum powder, rhenium powder, and a powder comprising at least one element selected from the group consisting of tellurium, iodine, selenium, chromium, nickel, copper, titanium, zirconium, tungsten, vanadium, and niobium. The mixed powders may be coalesced to form the material (e.g., the alloy).

A method for guaranteeing fast reactor core subcriticality under conditions of uncertainty involves, after assembling the reactor core, conducting physical measurements of reactor core subcriticality and comparing the obtained characteristics with design values; then, if there is a discrepancy between the values of the obtained characteristics and the design values, installing adjustable reactivity rods in the reactor at the level of a fuel portion of the reactor core, wherein the level of boron-B10 isotope enrichment of the adjustable reactivity rods is selected to be higher than the level of boron-B10 isotope enrichment of compensating rods of the reactor core. The technical result consists in improving the operating conditions of absorbing elements of a compensating group of rods, eliminating the need for increasing the movement thereof, simplifying monitoring technologies used during production, and simplifying the algorithm for safe reactor control.

A migration prevention system for radioactive wastewater from an underground nuclear power plant. The underground nuclear power plant includes a nuclear island including an underground cavern group including a reactor cavity and auxiliary cavities. The migration prevention system includes a protective layer coating the reactor cavity and an impermeable layer surrounding the nuclear island. The protective layer includes an inner liner, a drainage layer, and a filling layer of rock fractures in that order. The inner liner is configured to prevent exosmosis of the radioactive wastewater of the reactor cavity. The drainage layer is configured to gather and drain seepage water. The impermeable layer is disposed in the periphery of the underground cavern group including the reactor cavity and the auxiliary cavities, and is configured to isolate the underground cavern group from natural underground water.

A migration prevention system for radioactive wastewater from an underground nuclear power plant. The underground nuclear power plant includes a nuclear island including an underground cavern group including a reactor cavity and auxiliary cavities. The migration prevention system includes a protective layer coating the reactor cavity and an impermeable layer surrounding the nuclear island. The protective layer includes an inner liner, a drainage layer, and a filling layer of rock fractures in that order. The inner liner is configured to prevent exosmosis of the radioactive wastewater of the reactor cavity. The drainage layer is configured to gather and drain seepage water. The impermeable layer is disposed in the periphery of the underground cavern group including the reactor cavity and the auxiliary cavities, and is configured to isolate the underground cavern group from natural underground water.

A super plant comprises absolute technologies an ultra-transport system, an ultra-cycling light fluids bulk power electromagnetic fluids creep, stiffness precise balancing displacements energy, minimum energy balancing, minimal energy displacements for cosmological global gravitational dynamics conforming nullities relativity energy cycles to energy relativity structures comprising: means for opposing global air warming, affecting Heat Rate maximum efficiencies of the ultra-transport system, Regions 1-5 ultra-longevity boundaries ultra-fluxing, ultra-conserving the bulk power, the mega bulk power, boundaries perfections, and the magnetosphere mega bulk power Regions 4 portions mega bulk power portion.

A lift head for a reactor pressure vessel comprising a lift head which can be coupled and removed to a reactor pressure vessel head, and radiation shielding. The radiation shielding is connectable to the lift head such that the lift head and the radiation shield encase the reactor pressure vessel head and any head package contents removed from a reactor pressure vessel with the reactor pressure vessel head. The radiation shield may be of a clam shell construction. The lift head may be provided with a mechanism for fastening and unfastening the bolts connecting the reactor pressure vessel head to the reactor pressure vessel. The lift head may be provided with monitoring equipment to monitor the core internals.