What are V1 and V2? How they are connected? What is the harm in openin

1.	What are V1 and V2? How they are connected? What is the harm in opening F/M vault door during reactor operation?
Answer» The reactor building is divided into two areas. They are V₁ and V₂. V₁ – Dry volume area. V₂ – Wet volume area. V₁ area includes F/M vault, boiler room, and entire dome area. Rest of the areas in the reactor building is V₂ area. V₁ and V₂ are connected by vent shaft through suppression pool. F/M vault is a V₁ area and F/M maintenance bay is a V₂ area. Usually when there is an accident in F/M vault the pressure is relieved through boiler room through suppression pool and the uncondensed gases to V₂ area. When the reactor is in operation and if we open the F/M vault door, suppose of there is an accident in F/M vault the pressure released directly goes to F/M maintenance area, which is a V₂ area. Thus pressurizing the entire building.

What are V1 and V2? How they are connected? What is the harm in opening F/M vault door during reactor operation?

Answer»

The reactor building is divided into two areas. They are V₁ and V₂.

V₁ – Dry volume area.

V₂ – Wet volume area.

V₁ area includes F/M vault, boiler room, and entire dome area. Rest of the areas in the reactor building is V₂ area. V₁ and V₂ are connected by vent shaft through suppression pool.

F/M vault is a V₁ area and F/M maintenance bay is a V₂ area. Usually when there is an accident in F/M vault the pressure is relieved through boiler room through suppression pool and the uncondensed gases to V₂ area. When the reactor is in operation and if we open the F/M vault door, suppose of there is an accident in F/M vault the pressure released directly goes to F/M maintenance area, which is a V₂ area. Thus pressurizing the entire building.

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