The Nuclear Safety and Security Commission (NSSC) said it had shut down two reactors – one at the Gori nuclear complex and another at the Wolseong plant – after learning that both had used parts supplied with forged quality warranties. The scheduled resumption of another reactor under maintenance at Gori, and the start of a new reactor at Wolseong were postponed for the same reason. All parts supplied for use in South Korean reactors require quality and safety warranties from one of 12 international organizations designated by Seoul. Last year, officials said eight suppliers were found to have faked warranties covering thousands of items used in a number of reactors. Although they were "non-core" components that presented no public safety risk, the authorities instigated an inspection of all reactors nationwide and ordered the replacement of any parts supplied with forged documentation.