ML101370451

Acceptance Review Email, Review of the Topical Report, Process Protection System Replacement Diversity and Defense-in-Depth Assessment, Rev. 0, Related to License Amendment Request for Digital Upgrade (TAC ME3722-ME3733)

ML101370451
Person / Time
Site:	Diablo Canyon
Issue date:	05/17/2010
From:	Wang A Plant Licensing Branch IV
To:	Baldwin T, Parker L, Schrader K Pacific Gas & Electric Co
Wang, A B, NRR/DORL/LPLIV, 415-1445
References
TAC ME3732, TAC ME3733
Download: ML101370451 (2)

Text

From: Wang, Alan Sent: Monday, May 17, 2010 1:05 PM To: 'Baldwin, Thomas (DCPP)'; 'Larry Parker'; 'Ken Schrader' Cc: Lent, Susan; Burkhardt, Janet

Subject:

Acceptance Review for Diablo Canyon, Units 1 & 2, Review of Topical Report, Process Protection System Replacement Diversity & Defense-in-Depth Assessment (ME3732 and ME3733)

Tom and Larry:

By letter dated April 9, 2010 (ADAMS Accession Number ML101100646) with the publicly available Topical Report (ADAMS Accession Number ML101100647), Pacific Gas and Electric Company (PG&E) requested an approval of the topical report, "Process Protection System Replacement Diversity & Defense-in-Depth Assessment," Revision 0 for the use for the Diablo Canyon Power Plant, Unit Nos. 1 and 2 (DCPP). The proposed topical report will support PG&Es proposed replacement of the DCPP Eagle 21TM reactor trip system (RTS) and engineered safety features actuation system (ESFAS) in 2014 with a digital based instrumentation and control (I&C) replacement. The purpose of this letter is to provide the results of the U.S. Nuclear Regulatory Commission (NRC) staff's acceptance review of this 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.

Pursuant to NRC Standard Review Plan Branch Technical Position 7-19, "Guidance for Evaluation of Diversity and Defense-in-Depth In Digital Computer-Based Instrumentation and Control System,,' Revision 5, dated March 2007, the licensee requests approval of the enclosed DCPP Topical Report The NRC staff has determined that the Topical Report Process Protection System Replacement Diversity & Defense-in-Depth Assessment does provide technical information in sufficient detail to enable the NRC staff to proceed with its detailed technical review and make an independent assessment regarding the acceptability of PGEs 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) 415-1445.

Alan Wang Project Manager (Diablo Canyon)

Nuclear Regulatory Commission Division of Operating Reactor Licensing Alan.Wang@NRC.gov Tel: (301) 415-1445 Fax: (301) 415-1222

E-mail Properties Mail Envelope Properties (C0A338EE37A11447B136119705BF9A3F65521E1CE0)

Subject:

Acceptance Review for Diablo Canyon, Units 1 & 2, Review of Topical Report, Process Protection System Replacement Diversity & Defense-in-Depth Assessment (ME3732 and ME3733)

Sent Date: 5/17/2010 1:05:00 PM Received Date: 5/17/2010 1:05:00 PM From: Wang, Alan Created By: Alan.Wang@nrc.gov Recipients:

TRB1@pge.com ('Baldwin, Thomas (DCPP)')

Tracking Status: None LMP1@pge.com ('Larry Parker')

Tracking Status: None KJSe@pge.com ('Ken Schrader')

Tracking Status: None Susan.Lent@nrc.gov (Lent, Susan)

Tracking Status: None Janet.Burkhardt@nrc.gov (Burkhardt, Janet)

Tracking Status: None Post Office:

HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 11260 5/17/2010 Options Expiration Date:

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