Abstract: A method for treating a tumor, comprising identifying a tumor as a prostate cancer tumor and implanting in the tumor identified as a prostate cancer tumor, at least one diffusing alpha-emitter radiation therapy (DaRT) source with a suitable radon release rate and for a given duration, such that the source provides during the given duration a cumulated activity of released radon between 7 Mega becquerel (MBq) hour and 14.7 MBq hour, per centimeter length.

Abstract: A startup system for a solar boiler includes a main fluid circuit having a plurality of solar boiler panels for generating power from solar energy. An auxiliary fluid circuit is selectively connected in fluid communication with the main fluid circuit by a plurality of valves. An auxiliary boiler is operatively connected to the auxiliary fluid circuit. The valves connecting the auxiliary fluid circuit to the main fluid circuit are configured to be opened and closed to selectively place the auxiliary boiler in fluid communication with portions of the main fluid circuit to supply heat to the portions of the main fluid circuit in preparation to produce power from solar energy.

Abstract: In a startup period for a solar thermal electricity generating system, a non-solar source of steam heats a downstream receiver (for example, a superheating receiver) prior to insolation being available. Insolation, once available, heats an upstream receiver (for example, an evaporator). The upstream receiver can be arranged in a recirculation loop with a steam separation drum, which may be bypassed during the initial heating of the upstream receiver by insolation. Once sufficient temperature and pressure have been reached, steam from the upstream receiver is directed to the downstream receiver by way of the steam separation drum to replace the non-solar source of steam. Heating of the downstream receiver using steam from the upstream receiver continues until a threshold temperature and pressure are reached. Insolation is then directed at both the upstream and downstream receivers to generate steam for electricity production by a turbine.

Abstract: Thermal energy can be stored in a fluid-based thermal storage system for later use. The stored thermal energy may be derived from steam generated using insolation in a steam-based solar power system. The thermal storage system can store energy when insolation is generally available. Alternatively or additionally, the thermal energy may be derived from electricity from the electrical grid. For example, the thermal energy can store energy when the electrical grid has excess electricity available for storage. At a later time, the energy stored in the thermal storage system can be released to heat pressurized water or steam in addition to or in place of steam generated by the insolation. For example, the stored thermal energy may be used in preheating the solar power system during startup, in supplementing steam output of the solar power system, or to replace steam generation during low insolation periods.

Abstract: A startup system for a solar boiler includes a main fluid circuit having a plurality of solar boiler panels for generating power from solar energy. An auxiliary fluid circuit is selectively connected in fluid communication with the main fluid circuit by a plurality of valves. An auxiliary boiler is operatively connected to the auxiliary fluid circuit. The valves connecting the auxiliary fluid circuit to the main fluid circuit are configured to be opened and closed to selectively place the auxiliary boiler in fluid communication with portions of the main fluid circuit to supply heat to the portions of the main fluid circuit in preparation to produce power from solar energy.

Abstract: A startup system for a solar boiler includes a main fluid circuit having a plurality of solar boiler panels for generating power from solar energy. An auxiliary fluid circuit is selectively connected in fluid communication with the main fluid circuit by a plurality of valves. An auxiliary boiler is operatively connected to the auxiliary fluid circuit. The valves connecting the auxiliary fluid circuit to the main fluid circuit are configured to be opened and closed to selectively place the auxiliary boiler in fluid communication with portions of the main fluid circuit to supply heat to the portions of the main fluid circuit in preparation to produce power from solar energy.

Abstract: In a startup period for a solar thermal electricity generating system, a non-solar source of steam heats a downstream receiver (for example, a superheating receiver) prior to insolation being available. Insolation, once available, heats an upstream receiver (for example, an evaporator). The upstream receiver can be arranged in a recirculation loop with a steam separation drum, which may be bypassed during the initial heating of the upstream receiver by insolation. Once sufficient temperature and pressure have been reached, steam from the upstream receiver is directed to the downstream receiver by way of the steam separation drum to replace the non-solar source of steam. Heating of the downstream receiver using steam from the upstream receiver continues until a threshold temperature and pressure are reached. Insolation is then directed at both the upstream and downstream receivers to generate steam for electricity production by a turbine.

Abstract: Thermal energy can be stored in a fluid-based thermal storage system for later use. The stored thermal energy may be derived from steam generated using insolation in a steam-based solar power system. The thermal storage system can store energy when insolation is generally available. Alternatively or additionally, the thermal energy may be derived from electricity from the electrical grid. For example, the thermal energy can store energy when the electrical grid has excess electricity available for storage. At a later time, the energy stored in the thermal storage system can be released to heat pressurized water or steam in addition to or in place of steam generated by the insolation. For example, the stored thermal energy may be used in preheating the solar power system during startup, in supplementing steam output of the solar power system, or to replace steam generation during low insolation periods.

Abstract: A boiler for a solar receiver includes a first boiler panel having a plurality of tubes fluidly connecting an inlet header of the first boiler panel to an outlet header of the first boiler panel. The first boiler panel tubes form a first solar receiver surface. A second boiler panel has a plurality of tubes fluidly connecting an inlet header of the second boiler panel to an outlet header of the second boiler panel. The second boiler panel tubes form a second solar receiver surface. The first and second boiler panels are adjacent one another, a portion of the first boiler panel and an end of the first solar receiver surface overlapping an end of the second boiler panel to reduce solar radiation passing between the first and second solar receiver surfaces. A plurality of boiler panels may be arranged in rectangular or cylindrical orientation about a boiler central axis.