Around 14:00 The work was finished. Although nitrogen injection was stopped for approx. 10 minutes during the work, there were no significant changes in the parameters
11/3 16:50 Since some increase at the hydrogen density (hydrogen density of 2.9% [As of 16:30 on 11/3]) in the exhaust gas from PCV was observed from the last time of nitrogen injection amount change (hydrogen density of 2.7% [As of 18:10 on 10/30]), nitrogen injection amount was changed from 21m3/h to 26m3/h.
- Masashi Goto – Nuclear Reactor Designer teams up with ex-Hitachi Engineer Tanaka – PCV/RPV pipes broke after EQ not IC shutdown (enformable.com)
- Hydrogen accumulates in pipes at Fukushima’s No. 1 reactor – Possibility hydrogen also accumulated in Number 2 and Number 3 Reactors (enformable.com)
- Unit 1 containment, detection of more than 10,000ppm of hydrogen (enformable.com)