ML17024A329

Rec 2.1 Seismic: Cooper'S SFP Evaluation

ML17024A329
Person / Time
Site:	Cooper
Issue date:	12/15/2016
From:	Frankie Vega Japan Lessons-Learned Division
To:	Kirkpatrick B Nebraska Public Power District (NPPD)
References
Download: ML17024A329 (2)

Text

1 NRR-PMDAPEm Resource From: Vega, Frankie Sent: Thursday, December 15, 2016 9:00 AM To: Kirkpatrick, Brenda M. (bmkirkp@nppd.com)

Subject:

Rec 2.1 Seismic: Cooper's SFP evaluation Hello Mrs. Kirkpatrick;

Hope you're doing well. I'm currently reviewing Cooper's Rec 2.1 SFP evaluation. In order to complete my review I would need additional information / clarification on the piping evaluation performed as part of the SFP

submittal. Please see my question below:

The piping evaluation section states that piping attached to the SFP could not be confirmed to have been

evaluated to the SSE. In addition, this section states that piping is attached such that drain-down is possible to 10' above top of fuel, which is a "safe storage depth." However, analyses in EPRI's SFP Seismic Evaluation Guidance (EPRI 3002007148) considered initial SFP water losses only from seismically induced sloshing, and did not consider additional water losses such as from a potential SFP pipe-break located 10' above the top of the spent fuel. Additional information is needed to evaluate the potential for boil-off and uncovering the top thir d of the spent fuel within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> of a seismically induced pipe-break that resulted in unmitigated water loss to 10' above the top of the spent fuel, which is the event sequence outlined in the SPID (EPRI 1025287).

If need additional information from our end please let me know.

Thanks Frankie G. Vega, P.E. Project Manager NRR/JLD/JHMB 301-415-1617 Location: O-13H12

Hearing Identifier: NRR_PMDA Email Number: 3283 Mail Envelope Properties (Frankie.Vega@nrc.gov20161215085900)

Subject:

Rec 2.1 Seismic: Cooper's SFP evaluation Sent Date: 12/15/2016 8:59:58 AM Received Date: 12/15/2016 8:59:00 AM From: Vega, Frankie Created By: Frankie.Vega@nrc.gov Recipients: "Kirkpatrick, Brenda M. (bmkirkp@nppd.com)" <bmkirkp@nppd.com>

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