Holtec International said that it successfully loaded its 1,500th spent fuel canister last week as part of the ongoing dry storage campaign at Ameren Missouri’s Callaway Energy Center. Holtec’s HI-STORM UMAX subterranean dry storage system has been in service at Callaway since 2015. The MPC-37 multipurpose canister is used to place 37 pressurized water reactor spent fuel assemblies into each HI-STORM UMAX vertical ventilated module.
“There has been a strong collaboration between our teams, and I truly appreciate the strong focus on doing the work safely, correctly, and to the highest standards of excellence,” said Fadi Diya, senior vice president and chief nuclear officer of Ameren Missouri, in a March 17 announcement.
“Just as we shared the milestone in 2015 of deploying the world’s first subterranean dry storage system under a general license, we are proud to share this milestone with Ameren,” said Pierre Oneid, Holtec’s senior vice president and chief nuclear officer.
Other firsts: First deployed at Callaway, the subterranean storage system is the successor of the Holtec’s underground system installed at PG&E’s Humboldt Bay in 2008. The HI-STORM UMAX system is also installed at Southern California Edison’s San Onofre nuclear power plant, where the 73rd and final canister of spent fuel was placed into storage in 2020.
Holtec said that its dry storage activities include the industry’s first multipurpose canister, the first dual-purpose metal cask, the first transport cask qualified for high burn-up and mixed-oxide fuel, and the first double-wall canister.
Consolidated storage: Holtec also intends to use its HI-STORM UMAX system at its HI-STORE consolidated interim storage facility, currently undergoing licensing for deployment in New Mexico. The company expects a licensing decision by the Nuclear Regulatory Commission by the middle of this summer. HI-STORE would provide a centralized facility for storing spent nuclear fuel for an interim period instead of the dispersed storage at multiple nuclear plant sites around the country.