Core spray upper T-box clamp

This invention relates generally to nuclear reactors and more particularly, to apparatus and methods for repairing piping within reactor pressure vessels of such reactors. A T-box clamp apparatus which applies compressive forces to a T-box in a boiling water nuclear reactor pressure vessel is described. The T-box clamp apparatus clamps to the T-box and distribution header pipes to hold the distribution headers in place and in contact with the T-box. The T-box clamp apparatus includes a first and a second of clamp assembly and a clamp strong-back assembly coupled to the first and second clamp assemblies. Each clamp assembly includes upper and lower clamp bodies that are coupled to a distribution header pipe. The strong-back assembly includes an upper and a lower strong-back body configured to engage the T-box, with the upper strong-back body coupled to the upper clamp bodies of the first and second clamp assemblies, and the lower strong-back body is coupled to the lower clamp bodies of the first and second clamp assemblies.