It appears from a preliminary investigation on the Hampton that sailors in Submarine Squadron 11 had skipped the required analysis of the chemical and radiological properties of the submarine's reactor for more than a month, even though a daily check is required.
It is always the radcon! People who aren't Navy Nukes probably won't understand this but radcon (radiological controls) is one of the most tedious jobs on a nuclear reactor. Probably half of the Navy Nukes who have been to Captain's Mast (UCMJ Art 15) have been there due to falsified radcon logs. I remember 2 in my last two years at my old command--and one would have made Chief but was busted down to E-5 (and would have been denuked if his record wasn't spotless)!
The problem with reactor chemistry and radcon logs is that even though the job is tedious, if you start to make something up and aren't extremely smart about it, the logs will always give you away. Always. On my old boat those logs were reviewed over and over again before giving them to the CO to review just to make sure that some dumb ELT (Engineering Laboratory Technician--Navy Nuke who does Radcon work) didn't screw something up. Reading those logs and looking for discrepancies was about as much fun as watching paint dry, but without the fun fumes to distract you.
And if the CO doesn't catch errors in radcon logs, the Squadron will always put their nose in and check things out and the ORSE board, Naval Reactors Inspectors, and the Shipyards. Those logs that a tired ELT scribbles down at O'dark thirty will probably be reviewed by 10-15 people eventually. Someone will eventually find the error. I don't think even reactor operation logs are reviewed as religiously.
We didn't have radcon problems on my boat.
Programs have been made to overcome that. Input what you want the numbers to be and it will output the raw data you need.