The releases of soluble radionuclides from the nuclear fuel reprocessing plant at Windscale represent for some artificial radionuclides a major addition to the inventories due to nuclear test fallout on the northern hemisphere….
Livingston, Hugh D., Vaughan T. Bowen, and Stuart L. Kupferman. 1982. "Radionuclides from Windscale discharges I: Nonequilibrium tracer experiments in high-latitude oceanography." Journal of Marine Research 40, (1). https://elischolar.library.yale.edu/journal_of_marine_research/1583