A method for at least one of pre-startup and post-shutdown preparations of a solar operated power plant , the solar operated power plant comprising a solar receiver and at least one of a turbine and a heat exchanger , the solar receiver having a superheater section comprising a plurality of superheater panel arrangements , the method comprising: circulating working fluid flow in a first direction through a working fluid circuit , the first direction defined from the solar receiver to the at least one of the turbine and the heat exchanger, through the plurality of superheater panel arrangements , the working fluid from the solar receiver at least operates the turbine or transfer its heat through the heat exchanger ; and circulating an auxiliary fluid flow at predetermined parameters in a second direction, opposite to the first direction, through an auxiliary fluid circuit via the plurality of superheater panel arrangements to attain predetermined conditions thereof, the auxiliary fluid circuit being activated for a predetermined time: former to activation of the working fluid circuit , as the pre-startup preparation of the solar operated power plant, and after cessation of the working fluid circuit , as the post-shutdown preparation of the solar operated power plant; wherein the predetermined parameters is a variable of at least one of a predetermined temperature, a predetermined pressure and a predetermined flow rate of the auxiliary fluid, characterized in that the at least one predetermined parameter of the auxiliary fluid flow is varied to attain a desired temperature distribution along the plurality of superheater panel arrangements to minimize thermal stress thereon. circulating working fluid flow in a first direction through a working fluid circuit , the first direction defined from the solar receiver to the at least one of the turbine and the heat exchanger, through the plurality of superheater panel arrangements , the working fluid from the solar receiver at least operates the turbine or transfer its heat through the heat exchanger ; and circulating an auxiliary fluid flow at predetermined parameters in a second direction, opposite to the first direction, through an auxiliary fluid circuit via the plurality of superheater panel arrangements to attain predetermined conditions thereof, the auxiliary fluid circuit being activated for a predetermined time: former to activation of the working fluid circuit , as the pre-startup preparation of the solar operated power plant, and after cessation of the working fluid circuit , as the post-shutdown preparation of the solar operated power plant; former to activation of the working fluid circuit , as the pre-startup preparation of the solar operated power plant, and after cessation of the working fluid circuit , as the post-shutdown preparation of the solar operated power plant; wherein the predetermined parameters is a variable of at least one of a predetermined temperature, a predetermined pressure and a predetermined flow rate of the auxiliary fluid, characterized in that the at least one predetermined parameter of the auxiliary fluid flow is varied to attain a desired temperature distribution along the plurality of superheater panel arrangements to minimize thermal stress thereon. <EOS>