Activities related to waste and spent fuel management

Significant conclusions of this follow-on study are as follows: 1. The present method of testing the auxiliary feedwater pumps at the minimum flow condition leads to degradation of the pump and does not provide adequate indication of pump condition. An alternate method is proposed that consists of testing at normal operating pressure to eliminate degradation and verify flow at design conditions. 2. A large number of safety-related control functions are presently not verified to be operable by the periodic surveillance testing. This is a significant concern. It is recommended that the entire set of control wiring diagrams for the system be evaluated by an experienced engineer against the periodic test requirements to locate all omissions in testing. 3. Check valve condition is not adequately assessed by the present test methods. Recommendations are made in the report for new check valve diagnostic methods, and a comparison of diagnostic methods is provided. 4. Evaluations of current surveillance and testing should also be made for emergency service water switchover and flow verification and for evaluation of untestable functions. 5. Recommendations are provided for improved methods of diagnosing degradation in check valves, AFW pump testing at full flow, and addition of an emergency service water test line.