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Fusion Science and Technology
Penfield and Enos: Outage planning in the COVID-19 era
Energy Harbor’s Beaver Valley plant, located about 34 miles northwest of Pittsburgh, Pa., was one of many nuclear sites preparing for a scheduled outage as the coronavirus pandemic intensified in March. The baseline objective of any planned outage—to complete refueling on time and get back to producing power—was complicated by the need to prevent the transmission of COVID-19.
While over 200 of the plant’s 850 staff members worked from home to support the outage, about 800 contractors were brought in for jobs that could only be done on-site. Nuclear News Staff Writer Susan Gallier talked with Beaver Valley Site Vice President Rod Penfield and General Plant Manager Matt Enos about the planning and communication required.
Beaver Valley can look forward to several more outages in the future, now that plans to shut down the two Westinghouse pressurized water reactors, each rated at about 960 MWe, were reversed in March. “The deactivation announcement happened in the middle of all our planning,” Enos said. “It’s a shame we haven’t had a chance to get together as a large group and celebrate that yet.”
While the focus remains on safe pandemic operations, the site now has two causes for celebration: an outage success and a long future ahead.
Luis E. Aparicio F., Satoshi Ito, Hidetoshi Hashizume
Fusion Science and Technology | Volume 72 | Number 4 | November 2017 | Pages 789-795
Technical Note | dx.doi.org/10.1080/15361055.2017.1350522
Articles are hosted by Taylor and Francis Online.
This study evaluates the mechanical strength, failure mechanism and change in electrical resistance under shear stress of a mechanical lap joint of Rare-Earth Barium Copper Oxide high-temperature superconducting (HTS) tapes using indium as bonding material, which has been proposed for “remountable” (demountable) or segmented HTS magnet in future fusion reactors. Results from tensile shear tests using reinforced REBCO tapes along with an analysis on the failure mode demonstrated that contact conductivity is the critical parameter that defines joint’s shear strength rather than joint pressure. Additionally, it was concluded that change in joint resistance when failure occur is not abrupt and its behavior as joint displaces depends on the failure mode of the joint.