2.2.9 Program 19, Nuclear Vulnerability a. Objective To determine the damaging effecta of neutron heating incurred when a nuclear weapon is exposed to the flux from a nuclear explosion. b. Technique BRB2:01: 1000 ft and 1300 ft fro 3/4 in. thick steel shells. for thermal damage. th real and dummy pits were placed at about etonation and protected from blast by After detonation they were recovered and checked - 48 -