ML092390184

Request for Additional Information Email Regarding License Amendment Request to Support the Adoption and Use of the Alternate Source Term in the ANO-1 Safety Analyses

ML092390184
Person / Time
Site:	Arkansas Nuclear
Issue date:	08/27/2009
From:	Wang A Plant Licensing Branch IV
To:	David Bice Entergy Operations
Wang, A B, NRR/DORL/LPLIV, 415-1445
References
TAC MD7178
Download: ML092390184 (2)

Text

From:

Wang, Alan Sent:

Thursday, August 27, 2009 8:49 AM To:

BICE, DAVID B Cc:

Lent, Susan; Burkhardt, Janet

Subject:

Request for Additional Information Regarding Arkansas Nuclear One, Unit 1 Alternate Source Term License Amendment Request (MD7178)

Dave, By letter dated October 22, 2007, (Agencywide Documents Access & Management System (ADAMS) Accession No. ML073030537), as supplemented by letters dated April 3, 2008, and August 14, 2008 (Accession Nos. ML081000590 and ML082280106, respectively), Entergy Operations, Inc. (the licensee), submitted a license amendment request (LAR) to support the adoption of and use of the Alternate Source Term in the Arkansas Nuclear One, Unit 1 (ANO-1)

Safety Analyses.

The US Nuclear Regulatory Commission (NRC) staff has determined that the following additional information is needed to complete its review of the subject license amendment request for ANO-1. This request was discussed with David Bice of your staff on August 25, 2009, and it was agreed that a response would be provided within 30 days of receipt of this email. If circumstances result in the need to revise the requested response date, please contact me at (301) 415-1445 or via e-mail at Alan.Wang@nrc.gov.

REQUEST FOR ADDITIONAL INFORMATION

1. Are there any electrical non-safety related systems and components credited in the alternate source term analyses?

If so, a) Describe how this system will be electrically separated from the safety-related system (i.e., provide a detailed discussion on how a fault on the non-Class 1E electrical circuit will not propagate to the Class 1E electrical circuit).

b) Describe the independence (e.g., electrical and physical separation) and redundancy of these systems.

c) Describe how these systems meet the single failure criterion.

d) Describe how the operators will be notified in the event that these systems and components would become inoperable (e.g., control room annuciators).

e) Describe any impacts on seismic qualifications of these systems and components.

2.

Are any loads being added to the ANO-1 emergency diesel generators (EDGs)? If so, describe how the loads being added to the EDGs affect the capability and capacity of the EDGs (e.g., describe the impact of the proposed change on the EDG ratings) and provide the loading sequence changes for each EDG.

3. Provide a list and description of components being added to your Title 10 to the Code of Federal Regulations Section 50.49 (10 CFR 50.49) program due to this LAR. Confirm that these components are qualified for the environmental conditions they are expected to be exposed to.

4.

Are there any changes in the chemical composition of the chemical spray solution as a result of this LAR? If so, provide the chemical composition and provide a detailed evaluation to show the components are qualified for the environmental conditions they are expected to be exposed to. Also, describe, if any, changes in the operation of the chemical spray system and its impact on the environment.