The blast is thought to have taken place at the converter plant run by Scottish Power next to the Hunterston B nuclear facility. Emergency services have raced to Hunterston power station after reports of an explosion at the Ayrshire electricity-generating facility. Fire crews rushed to the site near the nuclear plant on Thursday afternoon. It's understood an onsight assessment is being carried out to establish the cause of the blast. No one has been hurt in the blast and it it believed there is no danger to the public. Locals in the area took to Twitter to report the incident. The explosion is thought to have taken place at the converter plant operated by Scottish Power next to the Hunterston B nuclear facility. The converter station switches the direct current (DC) electricity to alternating current (AC) so that it can be used within the existing electricity transmission system. Buildings near to the site of the explosion were evacuated but work at the nuclear station was unaffected. The converter plant is not part of the nuclear facility. Hunterston B power station has generated electricity since 1976. It is currently operated by EDF Energy and is due to run until 2023. Hunterston A nuclear power station was adjacent to Hunterston B and is currently being decommissioned.