The NRC has dismissed concerns that natural gas pipelines in the vicinity of the Indian Point nuclear facility pose a threat to the plant, lohud.com reports. The concerns were raised publicly by two nuclear engineers, one of whom works for the NRC, who alleged that an explosion in the gas lines could cause damage at the plant leading ultimately to a release of radioactive material. The engineers first raised the concern in 2010. In 2011, the NRC responded by noting that the matter had been investigated four times, in 1968, 1995, 2003, and 2008, and was found to have been resolved. According to the NRC, gas lines in the area are no closer than 620 feet from the facility’s containment dome. The assertion contradicts claims made by the engineers, who allege that “vital structures” sit within 400 feet of gas lines, lohud.com reports.