376 / | HD | INDUCED NUCLEAR REACTIONS: PROCESSES, SYSTEMS, AND ELEMENTS |
245 | DF | TESTING, SENSING, MEASURING, OR DETECTING A FISSION REACTOR CONDITION {10} |
250 | DF | .~ Leak detection {1} |
251 | DF | .~.~ Fuel element leak detection {2} |
252 | .~.~.~ By acoustic or ultrasonic wave energy |