I've been in this business since 1950

Robert H. Leyse in One Minute




I've been in this business since 1950 on several tasks
including the FLECHT tests that are referenced in
Appendix K. If you check ADAMS under Leyse, you will
find at least 172 entries. These include documents that I
have submitted to the NRC, related public comments, NRC
evaluations, and other matters.


My succinct discussion of fouling in the range of light water reactors over the decades may be found on GOOGLE by entering unmet relap. That is
U-N-M-E-T space R-E-L-A-P. You will find my slide presentation to the 2003 RELAP5 Users Conference under the title Unmet Challenges for SCDAP/RELAP5.



The impact of fouling on LOCAs or reactivity insertion accidents has not been evaluated although extensive fouling of fuel elements is widespread in the U.S.A. and elsewhere. In the U.S.A., ultrasonic fuel cleaning has been applied at some units. In Europe, chemical cleaning has been applied.



The impact of fouling has not been included in the wide range of international test
programs that address reactor accidents. The U.S.A. FLECHT Program never covered this, LOFT did not, and the present day work at Penn State does not.



I may update the 2003 presentation and call it Unmet Challenges for TRACE. Anyway, there are more examples that I would cite in such an update; however,
the bottom line is unchanged.