I'm looking to find a short story that takes place on the moon (I believe) and involves workers responsible for taking care of a power plant (nuclear, I think) that powers the entire earth.
Due to its instability, the workers must concentrate intensely while on the job lest the whole thing explode. The stress of constantly living on the edge of disaster leads to men cracking and even attempting to trigger an explosion.
A prominent psychologist (who may be a recurring character by this author?) is brought in to assess the situation but concludes there is nothing that can be done relieve the stress. In the end, however, the power plant is stabilized and the stress removed, saving everyone.
What story is this?