ML101720655

Acceptance Review Email, Relief Request ISI-3-31, Flaw Evaluation of Schedule 10 Emergency Core Cooling System Piping

ML101720655
Person / Time
Site:	San Onofre
Issue date:	06/21/2010
From:	Hall J Plant Licensing Branch IV
To:	Conklin L Southern California Edison Co
Hall, J R, NRR/DORL/LPL4,301-415-4032
References
TAC ME3961, TAC ME3962
Download: ML101720655 (1)

Text

From: Hall, Randy Sent: Monday, June 21, 2010 4:21 PM To: Linda.Conklin@sce.com

Subject:

NRC Acceptance Review for San Onofre Units 2 and 3, Relief Request ISI-3-31, TAC Nos. ME3961 and ME3962 June 21, 2010 Linda Conklin Manager, Nuclear Licensing San Onofre Nuclear Generating Station Southern California Edison

Linda, By letter dated May 19, 2010, Southern California Edison (the licensee) submitted a request for relief from the requirements of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI, for the San Onofre Nuclear Generating Station (SONGS), Units 2 and 3 (ADAMS Accession Number ML101440381). In its letter, submitting Relief Request ISI-3-31, the licensee requested approval of an alternative to the requirements in ASME Code Case N-513-2. Specifically, the licensee requested approval to apply Code Case N-513-2 for certain piping having operating temperatures greater than the limit of 200 degrees Fahrenheit, and for certain piping with a diameter smaller than 4 inches.

The purpose of this e-mail is to provide the results of the U.S. Nuclear Regulatory Commission (NRC) staff's acceptance review of this relief request. The acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the NRC staff to complete its detailed technical review. The acceptance review is also intended to identify whether the application has any readily apparent information insufficiencies in its characterization of the regulatory requirements or the licensing basis of the plant.

Consistent with Section 50.55a of Title 10 of the Code of Federal Regulations (10 CFR), an alternative to the requirements of that section or portion thereof may be used when authorized by the NRC. The applicant shall demonstrate that: 1) the proposed alternatives would provide an acceptable level of quality and safety, or 2) compliance with the specified requirements of this section would result in hardship or unusual difficulty without a compensating increase in the level of quality and safety.

The NRC staff has reviewed your application and concluded that it does provide technical information in sufficient detail to enable the staff to proceed with its detailed technical review and to make an independent assessment regarding the acceptability of the proposed relief request in terms of regulatory requirements and the protection of public health and safety and the environment. If additional information is needed for the staff to complete its technical review, you will be advised by separate correspondence.

If you have any questions, please contact me at (301) 415-4032.

Randy Hall, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing

Office of Nuclear Reactor Regulation USNRC (301) 415-4032 Randy.Hall@nrc.gov E-mail Properties Mail Envelope Properties ()

Subject:

NRC Acceptance Review for San Onofre Units 2 and 3, Relief Request ISI 31, TAC Nos. ME3961 and ME3962 Sent Date: 10/27/2009 2:06:52 PM Received Date: 6/21/2010 4:21:00 PM From: Hall, Randy Created By: Randy.Hall@nrc.gov Recipients:

Linda.Conklin@sce.com (Linda.Conklin@sce.com)

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 10746 10/27/2009 Options Expiration Date:

Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received: ZZZ