[en] The use of a solar energy facility for simulating the thermal environment (heat flux) produced as a result of hydrogen burns in a full-scale reactor containment building is described. Using a heat flux profile developed from calculations performed by the HECTR computer code, the Central Receiver Test Facility simulated the multiple burn thermal environment which HECTR predicted would result from the deliberate ignition of hydrogen generated by an S₂D accident. Functioning specimens of reactor monitoring and safety system equipment were exposed to this environment. Results of the equipment performance and temperature response are presented