NEW : Commander : `` We are being very conservative in our recommendations '' The Navy is limiting outdoor activities and securing ventilation systems . " NARRATOR: In the days after Katrina, many people were still trying to get back on their feet. The USS George Washington was docked for maintenance in Yokosuka , about 175 miles ( 280 kilometers ) from the plant in Okuma , when instruments detected the radiation at 7 a.m. Tuesday ( 6 p.m . ET Monday ) , the Navy said in a statement . Workers at the plant are scrambling to prevent a full meltdown .
NEW : Commander : `` We are being very conservative in our recommendations '' The Navy is limiting outdoor activities and securing ventilation systems . " NARRATOR: In the days after Katrina, many people were still trying to get back on their feet. Workers at the plant are scrambling to prevent a full meltdown .