double-flash

Noun

double flash (plural double flashes)

1. The characteristic visual phenomenon produced by the atmospheric detonation of a nuclear weapon, consisting of a very brief, bright flash of light which dims rapidly, followed by a second, gradually brightening flash.
   • On 22 September 1979 at about 1 a.m. GMT, a US Vela satellite passing over the South Atlantic detected a double flash of light in the vicinity of Prince Edward Island.2010 May, Norman Dombey, “Double Flash”, in London Review of Books (blog), London: LRB Limited
2. A system using two flash separators to separate phases of a working fluid.
   • Dipippo, in 2008, reported that the double-flash plant increased power output by 15-25% compared to a single flash plant under the same geothermal fluid conditions [9, 10].2018, A Rachmat, Nasruddin, A S Wibowo, A Surachman, “Exergoeconomic analysis and optimization of a combined double flash–binary cycle for Ulubelu geothermal power plant in Indonesia”, in IOP...