While working in Reactor Engineering at Davis Besse Nuclear Power Station, I participated in a Refueling Outage. While the nuclear reactor was being refueled, I was given the opportunity to go on a tour of the Reactor Building. To do this, I had to dress out in protective clothing to keep from becoming contaminated. After dressing out, I headed in and ventured onto the refueling bridge. When I looked down for the first time, I was astonished. Below me were 177 fuel assemblies which were causing the water to glow! As a fuel assembly was pulled from the core, it appeared as if it was surrounded by a sky-blue cloud. When my supervisor saw my face, he told me that the glow was known as the Cerenkov Effect. Even after the fuel assembly had been placed in a solid steel sleeve, the glow could still be seen around the outside of the sleeve. After seeing the reactor core, I went to see the Reactor Head. Only the upper two-thirds was visible because the bottom had to be shielded due to high radiation levels. Looking at the top of the head, I could see the Control Rod Drive Housing. This housing is what I had seen in many photographs while reviewing the Davis Besse Reactor Head incident. I was also taken to see the steam generators, which were located in a High Radiation Area. To enter, I had to be briefed by Radiation Protection and had to wear a special dosimeter. While looking at the steam generators, I saw one of the four reactor coolant pump motors. It was the biggest electric motor I had ever seen. After seeing these sights inside the Reactor Building, I will never forget working at Davis Besse.