ML032400216

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Final Accident Sequence Precursor Analysis of August 2000 Operational Event
ML032400216
Person / Time
Site: Millstone Dominion icon.png
Issue date: 09/08/2003
From: Richard Ennis
NRC/NRR/DLPM/LPD1
To: Christian D
Dominion Nuclear Connecticut
Ennis R, NRR/DLPM, 415-1420
References
IR-00-011, LER 01-005-00
Download: ML032400216 (4)


Text

September 8, 2003 Mr. David A. Christian Sr. Vice President and Chief Nuclear Officer Dominion Nuclear Connecticut, Inc.

Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711

SUBJECT:

MILLSTONE POWER STATION, UNIT NO. 2 - FINAL ACCIDENT SEQUENCE PRECURSOR ANALYSIS OF AUGUST 2000 OPERATIONAL EVENT

Dear Mr. Christian:

Enclosed for your information is the final Accident Sequence Precursor (ASP) analysis of an operational event which occurred at the Millstone Power Station, Unit No. 2, in August 2000.

The condition was reported by Licensee Event Report No. 2001-005-00, dated July 13, 2001, and documented in U.S. Nuclear Regulatory Commission (NRC) Inspection Report No.

50-336/2000-011, dated October 30, 2000. We prepared the final analysis based on our review and evaluation of your comments on the preliminary analysis, and comments received from the NRC staff. Our responses to your specific comments are included as an attachment to the enclosure. Our review of your comments employed the criteria contained in the material which accompanied the preliminary analysis. The results of the final analysis indicate that this event is a precursor (i.e., the importance or change in core damage probability is greater than 1E-6).

Due to the potential sensitivity of the information described in the enclosed ASP analysis and response to comments, the staff has not made the enclosure publicly available.

Please contact me at 301-415-1420 if you have any questions regarding the enclosure. We recognize and appreciate the effort expended by you and your staff in reviewing comments on the preliminary analysis.

Sincerely,

/RA/

Richard B. Ennis, Senior Project Manager, Section 2 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-336

Enclosure:

As stated (SENSITIVE - NOT FOR PUBLIC DISCLOSURE) cc w/o encl: See next page

September 8, 2003 Mr. David A. Christian Sr. Vice President and Chief Nuclear Officer Dominion Nuclear Connecticut, Inc.

Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711

SUBJECT:

MILLSTONE POWER STATION, UNIT NO. 2 - FINAL ACCIDENT SEQUENCE PRECURSOR ANALYSIS OF AUGUST 2000 OPERATIONAL EVENT

Dear Mr. Christian:

Enclosed for your information is the final Accident Sequence Precursor (ASP) analysis of an operational event which occurred at the Millstone Power Station, Unit No. 2, in August 2000.

The condition was reported by Licensee Event Report No. 2001-005-00, dated July 13, 2001, and documented in U.S. Nuclear Regulatory Commission (NRC) Inspection Report No.

50-336/2000-011, dated October 30, 2000. We prepared the final analysis based on our review and evaluation of your comments on the preliminary analysis, and comments received from the NRC staff. Our responses to your specific comments are included as an attachment to the enclosure. Our review of your comments employed the criteria contained in the material which accompanied the preliminary analysis. The results of the final analysis indicate that this event is a precursor (i.e., the importance or change in core damage probability is greater than 1E-6).

Due to the potential sensitivity of the information described in the enclosed ASP analysis and response to comments, the staff has not made the enclosure publicly available.

Please contact me at 301-415-1420 if you have any questions regarding the enclosure. We recognize and appreciate the effort expended by you and your staff in reviewing comments on the preliminary analysis.

Sincerely,

/RA/

Richard B. Ennis, Senior Project Manager, Section 2 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-336

Enclosure:

As stated (SENSITIVE - NOT FOR PUBLIC DISCLOSURE) cc w/o encl: See next page DISTRIBUTION:

PUBLIC JClifford BMcDermott, RGN-I PDI-2 Reading REnnis MHarper, RES OGC CRaynor DMarksberry, RES ACRS JGolla Accession Nos: Letter: ML032400216

Enclosure:

ML031950218 Package: ML032400216 OFFICE PDI-2/PM PDI-2/LA PDI-2/SC NAME REnnis CRaynor JClifford DATE 9/2/03 9/2/03 9/5/03 OFFICIAL RECORD COPY

Millstone Power Station Unit 2 cc:

Lillian M. Cuoco, Esquire Senior Counsel Dominion Resources Services, Inc.

Rope Ferry Road Waterford, CT 06385 Edward L. Wilds, Jr., Ph.D.

Director, Division of Radiation Department of Environmental Protection 79 Elm Street Hartford, CT 06106-5127 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 First Selectmen Town of Waterford 15 Rope Ferry Road Waterford, CT 06385 Charles Brinkman, Director Washington Operations Nuclear Services Westinghouse Electric Company 12300 Twinbrook Pkwy, Suite 330 Rockville, MD 20852 Senior Resident Inspector Millstone Power Station c/o U.S. Nuclear Regulatory Commission P.O. Box 513 Niantic, CT 06357 Mr. W. R. Matthews Senior Vice President - Nuclear Operations Dominion Nuclear Connecticut, Inc.

Rope Ferry Road Waterford, CT 06385 Mr. P. J. Parulis Manager - Nuclear Oversight Dominion Nuclear Connecticut, Inc.

Rope Ferry Road Waterford, CT 06385 Mr. J. Alan Price Site Vice President Dominion Nuclear Connecticut, Inc.

Rope Ferry Road Waterford, CT 06385 Mr. John Markowicz Co-Chair Nuclear Energy Advisory Council 9 Susan Terrace Waterford, CT 06385 Mr. Evan W. Woollacott Co-Chair Nuclear Energy Advisory Council 128 Terrys Plain Road Simsbury, CT 06070 Ms. Nancy Burton 147 Cross Highway Redding Ridge, CT 00870 Mr. G. D. Hicks Director - Nuclear Station Safety and Licensing Dominion Nuclear Connecticut, Inc.

Rope Ferry Road Waterford, CT 06385 Mr. S. E. Scace Assistant to the Site Vice President Dominion Nuclear Connecticut, Inc.

Rope Ferry Road Waterford, CT 06385 Mr. Chris L. Funderburk Director, Nuclear Licensing and Operations Support Dominion Resources Services, Inc.

Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711

Millstone Power Station Unit 2 cc:

Mr. A. J. Jordan, Jr.

Director - Nuclear Engineering Dominion Nuclear Connecticut, Inc.

Rope Ferry Road Waterford, CT 06385 Mr. S. P. Sarver Director - Nuclear Station Operations and Maintenance Dominion Nuclear Connecticut, Inc.

Rope Ferry Road Waterford, CT 06385 Mr. David W. Dodson Licensing Supervisor Dominion Nuclear Connecticut, Inc.

Rope Ferry Road Waterford, CT 06385