More context 22:52 Aug 20, 2016
I have posted the full paragraph which is only two sentences. However, I am also posting the preceding paragraph. Not sure if this helps or not:
At 17:12, as part of an accident management (AM) strategy, the Site Superintendent ordered a review and the preparation for water injection using fire engines. This was seen as an alternative AM measure, in addition to injection by the diesel driven fire pump through the fire protection system, make-up water condensate (MUWC) and LPCI system lines. It was decided to line up the alternative system to Unit 1 first, because its radiation levels were increasing more rapidly than those of Unit 2. Thus, the Unit 2 line-up work started later, at around 21:00. | 
peer agreement (net): +5