As part of up gradation a supplementary control room was introduced in RAPS & MAPS so that whenever the main control room become inaccessible followings functions can be carried out.

• shut down of the reactor

• monitor critical plant parameters like PHT system pressure & temperature, reactor power, moderator level etc.

Civil structures

The following mechanisms of ageing related degradation / ageing effect have been identified for buildings and structures. (Ref. AERB /SG /O-14)

• Concrete structures Leaching and efflorescence

• Abrasion, erosion, cavitation

• Chemical attack

• Fatigue, vibration caused by equipment etc.

• Carbonation

• Settlement

• Cracking and spalling

• Reinforcing steel Corrosion

• Pre-stressing steel Corrosion

• Loss of pre-stressing force