July 10, 2017
NORCROSS, GA — NAC International Inc. (NAC) is pleased to announce the safe and successful completion of the Kewaunee Power Station (KPS) dry fuel storage campaign. Placement of the 24th and final MAGNASTOR® dry fuel storage system on the Independent Spent Fuel Storage Installation (ISFSI) pad at Kewaunee occurred on June 15, 2017. This project was completed approximately four years after the station, owned by Dominion Energy Kewaunee (DEK), was permanently closed and 3.5 years after contract execution – an impressive new benchmark for the complete transfer of all spent fuel to dry storage after shutdown.

The turnkey project was awarded in December of 2013 and included site engineering, an ISFSI expansion, 24 MAGNASTOR systems, pool to pad (PtP) equipment and loading services. It was a key element of DEK’s strategy of achieving an accelerated transition to Phase 3 SAFSTOR decommissioning status. SAFSTOR is a Nuclear Regulatory Commission option allows up to 60 years for completion of decommissioning activities a site.

Key information about the project:

  • All remaining spent fuel – 887 assemblies – packaged into 24 MAGNASTOR casks
  • A licensed regional loading pattern allowed spent fuel with cool times as low as 2.5 years to be loaded on an accelerated schedule
  • PtP loading services were completed in 23 weeks, with planned five-day work weeks
  • Industry best loading durations averaging 3.2 days per cask system
  • Exceptional ALARA performance with total operational doses (combined gamma and neutron) of ~ 136 mR per MAGNASTOR system loaded
  • ZERO OSHA recordable events with nearly 100,000 on-site work hours
  • 24 MAGNASTOR systems and 14 legacy NUHOMS® systems represent the complete spent fuel inventory from almost 40 years of power generation at KPS

“The safe completion of this project demonstrates the MAGNASTOR system’s capabilities to enable prompt defueling, record-setting loading durations and low operational dose performance, which can be achieved with a strong project team, high standards of performance, and excellent partnership with your customer. The successful result at KPS is due in large measure to the unwavering support we received from the Kewaunee site personnel who maintained an environment of professionalism and teamwork from the start,” said Kent Cole, NAC President and CEO.

NAC continues to set new standards in dry storage decommissioning performance. NAC’s cask systems are the preferred technology at decommissioning defueling campaigns including the largest prior decommissioning spent nuclear fuel dry storage campaign at Zion in Illinois, where 61 systems were loaded within a 52-week record-setting schedule.

NAC’s leading-edge MAGNASTOR system (US Patent No.: 8,630,384 B2) was the first and is the most widely deployed ultra-high capacity (37PWR / 87BWR) canister system installed at commercial nuclear power plants. To date, more than 110 MAGNASTOR systems have been loaded and are in service storing more than 1,800 tons of spent fuel. NAC’s transportable spent fuel storage technologies are among the most widely deployed multipurpose canister systems in the United States. To date, 627 NAC systems have been ordered, and 550 have been fabricated, constructed, and delivered to commercial operating or decommissioning nuclear plants.

NAC is a diversified company specializing in nuclear fuel transport, used fuel management technology and fuel cycle consulting. Since 1968, NAC has been a global leader in providing solutions and services to the nuclear industry, working with both government and commercial organizations. NAC maintains its corporate headquarters in Norcross, Georgia. NAC is a wholly-owned subsidiary of Hitachi Zosen Corporation, a global leader in design and construction of environmental systems, industrial plants, industrial machinery, process equipment, infrastructure-related equipment, disaster prevention systems, and precision machinery.