In addition to the initial Individual Plant Examination (IPE) activity, FAI has supported IPE updates, including improvements to success criteria, the expansion of IPEs to plant specific PRAs, the assessment of Large Early Release Frequencies (LERF) and the review and modification of PRAs due to power uprates and/or plant modifications.
FAI has performed a number of key experiments to expand the understanding of severe accidents related to:
- Direct containment heating
- Drywell shell core debris interaction (Liner Melt-through)
- External cooling of the RPV
- Lower plenum penetration response
- Concentric tube cooling
- Jet attack on adjacent tube pairs
- In-vessel cooling
The extensive Level II work performed by FAI is indicative of both a strong knowledge base and a high-quality organization. Both in-house experiments and knowledge of experiments performed elsewhere have provided the FAI staff with an in-depth understanding of the broad technical basis developed for accident analyses including those focused on severe accident phenomena. This understanding is communicated through phenomenological position papers and these become part of the living documentation. These, coupled with a staff of experienced scientists and engineers with hands-on nuclear power plant experience, identifies FAI as the ideal choice for performing or assisting in Level II risk analysis.