ML100540785
| ML100540785 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 02/22/2010 |
| From: | Wang A Plant Licensing Branch IV |
| To: | Baldwin T, Parker L Pacific Gas & Electric Co |
| Wang, A B, NRR/DORL/LPLIV, 415-1445 | |
| References | |
| TAC ME2995, TAC ME2996 | |
| Download: ML100540785 (1) | |
Text
From:
Wang, Alan Sent:
Monday, February 22, 2010 11:05 PM To:
Larry Parker; Baldwin, Thomas (DCPP)
Cc:
Lent, Susan; Burkhardt, Janet
Subject:
Acceptance Review for Diablo Canyon License Amendment Request For Critical Damping Value for Structural Dynamic (ME2995 and ME2996)
Tom and Larry:
By letter dated December 14, 2009, Pacific Gas and Electric Company (PG&E) requested an amendment to the Facility Operating License for Diablo Canyon Power Plant, Unit Nos. 1 and 2 (DCPP). The proposed License Amendment Request (LAR)09-086 will revise the licensing basis and the Final Safety Analysis Report Update (FSARU) to allow use of a damping value of 5 percent of critical damping for the structural dynamic qualification of the control rod drive mechanism (CRDM) pressure housings on the replacement reactor vessel head for the design earthquake (DE), double design earthquake (DDE), Hosgri earthquake (HE), and loss-of-coolant accident (LOCA) loading conditions. The purpose of this letter is to provide the results of the U.S. Nuclear Regulatory Commission (NRC) staff's acceptance review of this amendment 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 50.90 of Title 10 of the Code of Federal Regulations (10 CFR),
an amendment to the license must fully describe the changes requested, and following as far as applicable, the form prescribed for original applications. Section 50.34 of 10 CFR addresses the content of technical information required. This section stipulates that the submittal address the design and operating characteristics, unusual or novel design features, and principal safety considerations.
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 make an independent assessment regarding the acceptability of the proposed amendment 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 (C0A338EE37A11447B136119705BF9A3F5A5D2EE409)
Subject:
Acceptance Review for Diablo Canyon License Amendment Request For Critical Damping Value for Structural Dynamic (ME2995 and ME2996)
Sent Date: 2/22/2010 11:08:01 PM Received Date: 2/22/2010 11:08:01 PM From: Wang, Alan Created By: Alan.Wang@nrc.gov Recipients:
LMP1@pge.com (Larry Parker)
Tracking Status: None TRB1@pge.com (Baldwin, Thomas (DCPP))
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 10555 2/22/2010 Options Expiration Date:
Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received: