March 14th, 2011 – Things are getting really bad at Unit 2

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From: Giitter, Joseph
Sent: Monday, March 14,,0f10 8,.8)4 PM
To: Hiland, Patrick •JtLIL’
Cc: Stutzke, Martin I

Thanks. I’ll forward to him. Things are really getting bad at the second unit. NISA reported-an explosion and TEPCO said that it happened in the
suppression pool.

From: Hiland, Patrick
Sent: Monday, March 14, 2011 8:33 PM
To: Glitter, Joseph

Marty stutzky in res may have data table in gi199

From: Giitter, Joseph
To: NRRDORL Distribution
Cc: Rihm, Roger; Kammerer, Annie; Hiland, Patrick; Thomas, Eric
Sent: Mon Mar 14 20:28:07 2011

The EDO has asked us to prepare a table that contains the following information for each of the operating reactors: Safe Shutdown Earthquake, Reference Level Earthquake and probable maximum tsunami or maximum tsunami water level (for coastal sites). I’m requesting you to obtain the pertinent information from the 1 st and 3 rd columns (as applicable) from the FSARs and provide it to Michael Mahoney the format below. Michael will put this information into an Excel spreadsheet so that it can be sorted various ways. I’m trying to get clarification on a couple of questions, including what is meant by Reference Level Earthquake.

Hopefully, I will be able to provide you with clearer instructions tomorrow morning-once I get this additional clarification. It may be that they were looking for Review Level Earthquake information, which is in Table 3.4 of the attached 5O.54(f) letter (GL 88-20, Supplement 4) pertaining to Individual Plant Evaluations of External Events (IPEEE).

The 50.54(f) letter can be found at drs/toolboxlfp refs/Gen-Ltrs/g1882os4.pdf.

I also have a call into Annie Kammerer to see if she has any of this information available. { I checked with the Ops Center and they referred me to Annie. If at all possible, please provide this information to Mike no later than 11:00 on Tuesday.

1. The controlling tsunami occurs during simultaneous high tide and storm surge produces a maximum runup to elevation +15.6 feet mean lower low water line (mllw) at the Unit 2 and 3 seawall. When storm waves are superimposed, the predicted maximum runup is to elevation +27 mllw. Tsunami protection for the SONGS site is provided by a reinforced concrete seawall constructed to elevation +30.0 mllw.

2. The NRC requires safety-significant structures, systems, and components be designed to take into account: (i) The most severe natural phenomena historically reported for the site and surrounding area, with sufficient margin for the limited accuracy, quantity, and period of time in which the historical data have been accumulated, (2) appropriate combinations of the effects of normal and accident conditions with the effects of the natural phenomena and (3) the importance of the safety functions to be performed.

3. The design basis earthquake (DBE) is defined as that earthquake producing the maximum vibratory ground motion that the nuclear power generating station is designed to withstand without functional impairment of those features necessary to shut down the reactor, maintain the station in a safe condition, and prevent undue risk to the health and safety of the public. The DBE for SONGS was assessed during the construction permit phase of the project. The DBE is postulated to occur near the site (5 miles), and the ground accelerations are postulated to be quite high (o.67g), when compared to other nuclear plant sites in the U.S (o.25g or less is typical for plants in the eastern U.S.). Based on the unique seismic characteristics of the SONGS site, the site tends to amplify long-period motions, and to attenuate short-period motions. These site-specific
characteristics were accounted for in the SONGS site-specific seismic analyses.

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