Calculation examination of the Baneberry event: addendum

Baneberry, a 42-TJ (10-kt) nuclear device, was detonated at a depth of 278 m in hole U8d at the Nevada Test Site on December 18, 1970. Approximately 3.5 min following the nuclear explosion, radioactive gases and debris began venting through a shock-induced fissure that had opened earlier near ground zero. This report describes three computer calculations that supplement an earlier study of the sequence of dynamic phenomena associated with the Baneberry event. In the earlier study, the BANE 1 calculations provided results in reasonable agreement with all the measurements and observations made on Baneberry. This report and the earlier study clearly indicate that all three undesirable geologic features identified at the Baneberry site contributed to the open fracture path between the cavity and surface. This study also provides new insight into the explosive phenomenology following the nuclear detonation.