Molten metal-filled silicon carbide fuel cladding tube and uniform distribution fabrication method

A method for encapsulating nuclear fuel pellets, comprising:

• placing nuclear fuel pellets inside a hollow interior space within a tubular cladding structured to include SiC to hold the nuclear fuel pellets inside the tubular cladding with a continuous gap between the nuclear fuel pellets and an interior sidewall of the tubular cladding and one interior end of the tubular cladding;
• and
• forming a metal filler structure that becomes molten during a nuclear reaction of the nuclear fuel pellets inside the tubular cladding and structured to include a metal tube that fills in the continuous gap between the nuclear fuel pellets and the interior sidewall of the tubular cladding to provide sealing to interior of the tubular cladding during the nuclear reaction and structured to include a closed metal end cap at one end of the nuclear fuel pellets to leave a space between one end of the interior sidewall of the tubular cladding and the closed metal end cap of the metal filler structure as a reservoir for accumulating a fission gas from the nuclear fuel pellets during a nuclear reaction of the nuclear fuel pellets.