A diagram describing pressurized thermal shock in a nuclear reactor. Credit: Japan Atomic Energy Agency. Japan's worst embrittled RPV, at Genkai 1, has been permanently closed in the aftermath of Fukushima.Citing the risks of reactor pressure vessel (RPV) fracture, core meltdown, and catastrophic release of hazardous radioactivity at Entergy's Palisades atomic reactor in southwest Michigan, an environmental coalition (Beyond Nuclear, Don't Waste MI, MI Safe Energy Future, and Nuclear Energy Info. Service of IL) has appealed an Atomic Safety and Licensing Board (ASLB) panel's adverse ruling to the full U.S. Nuclear Regulatory Commission (NRC).

The coalition's legal counsel, Toledo-based attorney Terry Lodge, filed the appeal on June 2nd.

Arnie Gundersen, Chief Engineer at Fairewinds Associates, Inc. in Burlington, VT, serves as the coalition's expert witness on the risks of pressurized thermal shock (PTS) causing "brittle fracture" in the Palisades RPV. Gundersen and Fairewinds Energy Education have produced a short, humorous, educational video about PTS risks entitled "Nuclear Crack Down?"

NRC has admitted on numerous occassions that Palisades has the worst neutron radiation embrittled RPV in the country. Palisades first surpassed embrittlement safety standards in 1981, just ten short years into its operations. NRC, and/or the nuclear utilities owning and operating Palisades, have previously predicted various "End of Life" dates for the problem-plagued atomic reactor, the earliest being 1995. However, as reported by Jeff Donn of AP in 2011, NRC has weakened safety regulations time after time, to accommodate the age-degraded nuclear power plant, one of the oldest still operating in the U.S.

See updates on Beyond Nuclear et al.'s intervention against Entergy Palisades' License Amendment Request for regulatory relief dating back to Dec. 1, 2014 at the Reactor Safety website section.