Kashiwazaki-Kariwa nuclear plant is in Japan’s Niigata Prefecture.

A week right after Japanese regulators postponed the restart of the world’s largest nuclear energy plant due to security lapses, a careless employee functioning from house added to the company’s woes.

Tokyo Electric Energy Co., which operates the Kashiwazaki-Kariwa nuclear energy plant in Japan’s Niigata prefecture, stated an employee placed a stack of documents on top rated of a auto prior to driving off and losing them.

The mishap is the newest in a string of errors for the utility and is probably to additional erode the regulator’s self-confidence in Tepco. Security lapses and a strict regulatory approach have stopped Japan from restarting most of its nuclear reactors shut in the wake of the 2011 Fukushima disaster.

The nation’s Nuclear Regulation Authority, which oversees security protocols of Japan’s remaining 33 reactors, decided just final week to retain a de facto ban on the energy station from resuming operations, saying that the utility’s preventative measures are inadequate.

The utility found the breach when a regional resident located some of the papers, which have been connected to dealing with fires and floods. The organization is nonetheless attempting to recover 38 pages of documents. Each the employee and their manager have been provided warnings and Tepco stated it would make confident all employees adhere to stringent guidelines on taking documents and data off-web-site.