ML15089A353

Comment (1) of Nelson Dewey on LaSalle License Renewal Application Environmental Review

ML15089A353
Person / Time
Site:	North Anna, Clinton, LaSalle
Issue date:	03/12/2015
From:	Dewey N - No Known Affiliation
To:	Drucker D M, Jeffrey Mitchell Rules, Announcements, and Directives Branch, Office of Nuclear Reactor Regulation
References
80FR5793 00001, NRC-2014-0268
Download: ML15089A353 (2)

Text

Mendiola, Doris FW: ACTION: LaSalle License Renewal Application]lEvironmental Review public comment (Regulations.gov under NkC-2014-026' F-'n. mi-w R7 h,*rm il km

Subject:

rLi:.m.....Irnme NIllcnn IlnAu, rmnili Sent: Thursday, March 12, 2015 9:27 PM To: Drucker, David; Mitchell, Jeffrey

Subject:

LaSalle License Renewal Before hydraulic fracturing, there was 1 or 2 earthquakes/year in Oklahoma.

Now there are 1 to 2 earthquakes/

day.LaSalle Station is sited north of the northern reach of New Albany Shale. Clinton sits just at the north end of this formation.

Illinois is allowing hydraulic fracturing to begin in the shale field south of Clinton to the Kentucky border.Follow the KY -TN line to Missouri and you reach New Madrid and a potential source of pent-up seismic activity.LaSalle and Clinton was sited after a geologic study determined how to build the sites to withstand the most credible earthquakes.

Those studies did not account for fracking.How will that analysis change when fracking begins in Southern Illinois.How is that analysis accounted for in the License Renewal application.

How will the potential increased seismic activity affect the safety of LaSalle as it operates beyond their original 40 year life.Please note the below reference to the North Anna fuel and nuclear detector motion during the Mineral VA earthquake.

REF: http://pbadupws.nrc.gov/docs/ML1127/M L11272A129.pdf VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 POST-EARTHQUAKE RESTART READINESS DETERMINATION PLAN STATUS UPDATE SUNSI Review Complete Template = ADM -013 E-RIDS= ADM-03 )Add= r-0 d Page 12: The RCE concluded the direct cause for both the Unit 1 and Unit 2 reactor trips was the initiation of the Power Range Nuclear Instrument high negative flux rate reactor trip. Both Unit 1 and Unit 2 met the required coincidence of 2 out of 4 Power Range Nuclear Instruments (PRNI) with greater than a 5% change in 2.25 seconds.The Root Cause of the negative flux rate event was a combination of seismically induced conditions, which include core barrel movement, detector movement, and fuel motion.The additive effects of the combined conditions resulted in momentary changes in indicated flux and under-moderated core conditions as evidenced by the oscillatory, but overall decreasing flux profiles from both Unit 1 and Unit 2.2