ML041690189
| ML041690189 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 06/17/2004 |
| From: | Alexion T NRC/NRR/DLPM/LPD4 |
| To: | Forbes J Entergy Operations |
| Alexion T W, NRR/DLPM, 415-1326 | |
| Shared Package | |
| ML041690247 | List: |
| References | |
| FOIA/PA-2004-0277, IR-01-006 | |
| Download: ML041690189 (4) | |
Text
June 17, 2004 Mr. Jeffrey S. Forbes Site Vice President Arkansas Nuclear One Entergy Operations, Inc.
1448 S. R. 333 Russellville, AR 72801
SUBJECT:
ARKANSAS NUCLEAR ONE, UNIT 1 (ANO-1) RE: FINAL ACCIDENT SEQUENCE PRECURSOR ANALYSIS OF AUGUST 2001 OPERATIONAL CONDITION
Dear Mr. Forbes:
Enclosed for your information is the final Accident Sequence Precursor (ASP) analysis of an adverse condition which was identified at ANO-1 in August 2001. The condition involved inadequate fire protection and procedures for the north switchgear room, fire zone 99M, and is described in Nuclear Regulatory Commission (NRC) Inspection Report 50-313/01-06; 50-368/01-06 dated August 20, 2001, and in the final significance determination for this inspection report, Enforcement Action 03-016 dated April 7, 2004. This condition was determined to be of low to moderate safety significance (White) in accordance with the Significance Determination Process (SDP). The results of the final ASP analysis indicate that this condition is an accident precursor (i.e., a condition which results in a change in conditional core damage probability (CCDP) > 1E-6).
For the August 2001 condition, the findings in the ASP analysis (change in CCDP and dominant risk contributors) are consistent with those in the SDP. Since this ASP analysis confirms the results of the final significance determination, which has been reviewed by the NRC staff and Entergy Operations, Inc., it is being issued as a final product for information only. In the past, preliminary versions of all ASP analyses were issued for internal peer review by the NRC staff and for external peer review by the licensee. Comments received from these reviews were then resolved as part of the final analysis. To increase efficiency, we are now issuing the noncontroversial ASP analyses as final documents.
The NRC staff is continuing to review the appropriate classification of these documents within our records management program, considering changes in our practices following the events of September 11, 2001. Pending a final determination, the enclosed analyses have been marked as sensitive information. Therefore, the staff has not made it publicly available. Please control the document accordingly. We will inform you if the classification of the document changes as a result of our ongoing assessments. If you believe that your response to this letter includes potentially sensitive information, please discuss the matter with me prior to submitting the information.
If you have any questions regarding the analysis, please contact me at 301-415-1326.
Sincerely,
/RA/
Thomas W. Alexion, Project Manager, Section 1 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-313
Enclosure:
As stated (Sensitive - Not for Public Disclosure) cc w/o encl: See next page If you have any questions regarding the analysis, please contact me at 301-415-1326.
Sincerely,
/RA/
Thomas W. Alexion, Project Manager, Section 1 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-313
Enclosure:
As stated (Sensitive - Not for Public Disclosure) cc w/o encl: See next page DISTRIBUTION:
PUBLIC (w/o encl)
PDIV-1 Reading RidsOgcRp RidsAcrsAcnwMail Center RidsNrrDlpmLpdiv1 (RGramm)
RidsNrrPMTAlexion RidsNrrLADBaxley RidsNrrLADJohnson SRosenberg RidsRgn4MailCenter (AHowell)
AGrady Accession No.:ML
- memo requesting transmittal of ASP to licensee OFFICE PDIV-1/PM PDIV-1/LA RES/DRRA/D PDIV-1/SC NAME TAlexion DBaxley CAder*
RGramm DATE 6/15/04 6/7/04 05/10/04 6/15/04 OFFICIAL RECORD COPY
June 2004 Arkansas Nuclear One cc w/o encl:
Executive Vice President
& Chief Operating Officer Entergy Operations, Inc.
P. O. Box 31995 Jackson, MS 39286-1995 Director, Division of Radiation Control and Emergency Management Arkansas Department of Health 4815 West Markham Street, Slot 30 Little Rock, AR 72205-3867 Winston & Strawn 1400 L Street, N.W.
Washington, DC 20005-3502 Mr. Mike Schoppman Framatome ANP 3815 Old Forest Road Lynchburg, VA 24501 Senior Resident Inspector U.S. Nuclear Regulatory Commission P. O. Box 310 London, AR 72847 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 County Judge of Pope County Pope County Courthouse Russellville, AR 72801 Vice President, Operations Support Entergy Operations, Inc.
P. O. Box 31995 Jackson, MS 39286-1995 Wise, Carter, Child & Caraway P. O. Box 651 Jackson, MS 39205