3
Support systems
Main AC electric power system
Emergency AC electric power system
Safety related DC power system
Component cooling system ( safety related features ).
Safety equipment room cooling arrangements
Instrument air system
Ultimate heat sink arrangements + interfaces with component cooling.
General safety provisions
Provisions against internal fires Provisions against internal floods Provisions against external events
cable segregation etc
safe shutdown earthquake level
external flood
any others
Containment capability
Specification of the containment free volume, design pressure and (if available ) ultimate pressure capability.
Description of any special arrangements (eg controlled venting ) which vary from the normal arrangement of a large dry, non-vented PWR
containment.
Initiating Events
Information on initiating events if it is thought that the PWR
generic event frequencies would not be applicable to the Daya Bay plant. (for example different steam generator tube design )
Information detail
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There is no exact specification of the information required on each system or general provision mentioned above. However, the following indications are given as to the level required to make full use of the pilot study capability.
Frontline systems
Information on the success criteria for standard accident situations (eg large LOCA, small LOCA, loss of feed) and the total system
capability (number of redundant pumps etc ).
Simple line diagrams of the essential process routes (Fig 1 gives an example of the level of detail which would be appropriate )
Description ( or diagram ) of the dependency upon support systems.
Requirements for manual actions in support of functions.
Support systems
Simple diagrams of main process/supply routes.
Redundancy vs success criteria information (where applicable ) Description of dependency on other support systems