Many of the items of information requested for chapter 3 are also relevant to chapter 4. The list below is of additional information requested for chapter 4, except for the first three items (which were requested for
In the event that chapter 3) which are reproduced again for emphasis. fully adequate information is not provided, default information will be used on the same basis as in chapter 3.
1.
2.
Specification of the containment free volume, design pressure and (if available) ultimate pressure capability.
Description of any special arrangements (e.g. controlled venting) which vary from the normal arrangement of a large, dry, non-vented PWR
containment.
3.
4.
5.
Information (as requested for chapter 3) on the containment spray system and the containment fan cooler system.
A diagram showing the dimensions of the primary containment and the layout of, at least, the pressure vessel and the reactor cavity.
The volume and surface area of the main passive heat sinks in the primary containment (i.e. all significant masses of concrete).
6.
7.
The location of the containment sumps.
The mass of uranium dioxide in the core and the mass of zirconium in
the core.
8.
9.
The nature of any special design measures (e.g. kerbing or piping) taken with the intention of ensuring that the reactor cavity is wet (or dry) in the event that molten core material should enter the
cavity.
The composition of the basemat concrete (if decided).