ANS Northeastern Section Speaker Meeting Announcement for October 23, 2013


Featuring Graham B. Wallis

Emeritus Sherman Fairchild Professor of Engineering, Dartmouth College


Long term cooling of the reactor core by recirculation of water from the sump of a PWR following a LOCA differs from short-term cooling by ECCS that the NRC has regulated under 10 CFR 50.46 for decades.   The numerous constituents of debris, mostly created by the jet from the LOCA, complicate prediction and verification of the performance of strainers that are intended to protect the pumps and particularly the core.   This gave rise to the NRC’s generic safety issue GSI-191 that is still incompletely resolved after 17 years and has led to major changes in many nuclear plants as well as a succession of tests that have sometimes yielded surprises.   The history of this issue and of the pertinent technical phenomena will be reviewed.

About The Speaker:

Graham Wallis is the emeritus Sherman Fairchild Professor of Engineering at Dartmouth, where he has been a faculty member since 1962.   He has worked in the area of multiphase flows for over 50 years.   His book “One-Dimensional Two-Phase Flow” was published in 1969.   From 1988 to 2007 he was a member of the U.S. Nuclear Regulatory Commission’s Advisory Committee on Reactor Safeguards, being its Chairman in the years 2005 and 2006.  He continues to consult for that committee.

Contact Information:


Members and Visitors : $30.00
Students: $10.00
Spouse: $30.00
Non-members: $42.00

Dinner included
Membership Dues (2013 -14 Season): ($20.00 good through 8/2014)

Checks and/or Cash only:

5:30 pm: Registration & Social Hour

6:15 pm: Dinner- Buffett Served
7:00 pm: Speaker
8:15 pm: Adjourn

No Show Advisory:

We are charged according to the head-count provided prior to the meeting, no-shows hurt ANS/NE financially. If you need to cancel after signing up, please give us notice before 12:00 noon on October 21.

Please note if you make reservations and don’t show up, we will end up paying for your dinner.  If your plans change, please let us know ahead of time, otherwise, we will be asking you for the full payment.


EPM, Inc. is located at 959 Concord Street in Framingham:

Mass Pike to Natick exit, (exit 13) keep right after the tolls and continue on Route 30 west bound to right turn on to Concord Street, (route 126 North) to EPM office at 959, brick three story building, proceed to 3rd floor.

The schedule for future Northeastern Section meetings is available on the NE site:

ANS NE Link:


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