There are also two other residential structures, a large dairy barn and several auxiliary buildings.
The second auxiliary building was not constructed until 1950.
Most auxiliary buildings at the first three reactors have been demolished, as well.
Sections of the reactor's auxiliary building were painted earlier this week, he said.
The auxiliary buildings were reworked from the 18th century facilities.
A couple of the auxiliary buildings remained intact until the mid-1970s.
Around the courtyard, four wings of auxiliary buildings were planned out but never built.
However, each castle can only support a certain number of auxiliary buildings.
In 19th century military barracks, sheds were used as auxiliary buildings for various purposes.
Graves's hospital base was the east wing of an auxiliary building across the street from the hospital.