ML12213A035

NRR E-mail Capture - Sequoyah 1 - Heavy Loads LAR

ML12213A035
Person / Time
Site:	Sequoyah
Issue date:	07/30/2012
From:	Mackaman C Tennessee Valley Authority
To:	Siva Lingam Division of Operating Reactor Licensing
References
TAC ME7225
Download: ML12213A035 (2)

Text

NRR-PMDAPEm Resource From: Mackaman, Clyde Douglas [cdmackaman@tva.gov]

Sent: Monday, July 30, 2012 4:37 PM To: Lingam, Siva Cc: Casey, Kevin E; Carter, Scott C; Gish, Roger D; william.foxIV@areva.com; Gillman, Marie

Subject:

RE: Sequoyah 1 - Heavy Loads LAR (TAC No. ME7225)

Siva, Based on input from the TVA Steam Generator Team, the determination for the soil-structure interaction on the Outside Lift System (OLS) did not use this software (SASSI) and, as such, the identified flaw in the software does not affect the soil-structure interaction calculation for the SQN Heavy Loads LAR.

GTStrudl was used to model the crane. In Strudl, the base node (bottom center of the crane) was the single support of the crane, leaving all the other nodes to react based on the external forces applied to that node. The forces were those defined by the amplified response spectra which was determined from an earlier calculation (CSG-87-018). The soil-structure interaction was incorporated into the analysis as spring stiffnesses into the support node.

Clyde Mackaman TVA Corp. Licensing 423-751-2834 From: Lingam, Siva [1]

Sent: Monday, July 30, 2012 9:34 AM To: Mackaman, Clyde Douglas Cc: Hoang, Dan

Subject:

Sequoyah 1 - Heavy Loads LAR (TAC No. ME7225)

The subject LAR indicated that the soil-structure interaction effects at the OLS ring foundation have been calculated. DOE published an article regarding operating experience level 3 (OE-3: 2011-02, August 2011; SASSI Software Problem) stating that there is flaw in the System for Analysis of Soil-Structure Interaction (SASSI) subtraction method. Which method TVA used for soil-structure interaction? If SASSI subtraction method was utilized by TVA, please let us know whether TVA took care of DOE concern ASAP.

Siva P. Lingam U.S. Nuclear Regulatory Commission Project Manager (NRR/DORL/LPL2-2)

Sequoyah Nuclear Plant Crystal River Nuclear plant (EPU)

Location: O8-D5; Mail Stop: O8-G9a Telephone: 301-415-1564; Fax: 301-415-1222 E-mail address: siva.lingam@nrc.gov 1

Hearing Identifier: NRR_PMDA Email Number: 430 Mail Envelope Properties (3636053362D0844A86C2882FA403399306D2873B)

Subject:

RE: Sequoyah 1 - Heavy Loads LAR (TAC No. ME7225)

Sent Date: 7/30/2012 4:36:36 PM Received Date: 7/30/2012 4:36:49 PM From: Mackaman, Clyde Douglas Created By: cdmackaman@tva.gov Recipients:

"Casey, Kevin E" <kecasey@tva.gov>

Tracking Status: None "Carter, Scott C" <sccarter@tva.gov>

Tracking Status: None "Gish, Roger D" <rdgish@tva.gov>

Tracking Status: None "william.foxIV@areva.com" <william.foxIV@areva.com>

Tracking Status: None "Gillman, Marie" <mgillman@tva.gov>

Tracking Status: None "Lingam, Siva" <Siva.Lingam@nrc.gov>

Tracking Status: None Post Office: TVAMSSXVS1.main.tva.gov Files Size Date & Time MESSAGE 1899 7/30/2012 4:36:49 PM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received: