Verification of the Efficacy of Passive Autocatalytic Recombiners in a Typical Pressurized Water Reactor under a Station Blackout Condition

Table 1

PAR characteristic for SKN units 3 and 4.

Company	Korea Nuclear Technology (KNT)
Type	Catalytic
Quantity (for each unit)	(i) Large: 16 (including 8 PARs for DBA); (ii) Medium: 10 (including 8 PARs for DBA); (iii) Small: 4
Recombination rate (g/sec)	(i) Large: 0.9 at 4.0 v/o H2, 2.0 at 8.0 v/o H2; (ii) Medium: 0.4 at 4.0 v/o H2, 1.0 at 8.0 v/o H2; (iii) Small: 0.2 at 4.0 v/o H2, 0.5 at 8.0 v/o H2
Operable hydrogen concentration	(i) Above 2.0 v/o (initial); (ii) Above 0.5 v/o (continuous)
Material	(i) Housing: stainless steel; (ii) Catalyst: Al2O3 + Pt coating