The 143 meter long, 10300 dwt cargo vessel Thorco Celebration caught fire while moored at São Sebastião, Brazil.   The fire started in one of the cargo holds while repairs were being done  from a welder.  Sparks from the welder caught wooden packages ablaze and quickly got out of control.  The crew requested local firefighters who arrived along with a fire tug.   The firefighters were able to extinguish the fire a short time later.   No reports of injuries or pollution released.