ML20217M921
| ML20217M921 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 08/19/1997 |
| From: | Mcdonald D NRC (Affiliation Not Assigned) |
| To: | Carns N NORTHEAST NUCLEAR ENERGY CO. |
| Shared Package | |
| ML20217M923 | List: |
| References | |
| TAC-M99266, NUDOCS 9708250360 | |
| Download: ML20217M921 (5) | |
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UNITED STATES s,
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August 19, 1997 Mr. Neil S. Carns Senior Vice President and Chief Nuclear Officer Northeast Nuclear Energy Company c/o Ms. Patricia A. Loftus Director - Regulatory Affairs P.O. Box 128 Waterford, CT 06385
SUBJECT:
CONTINUED OPERATION WITHOUT A HIGH STARTUP RATE 1 RIP -
MILLS 10NE NUCLEAR POWER STATION, UNIT NO. 2 (TAC NO. M99266)
Dear Mr. Carns:
By "B16339, Submits Update to Response to RAI Question 3 Re GL 95-07, Pressure Locking & [[Topic" contains a listed "[" character as part of the property label and has therefore been classified as invalid. of SR Power-Operated Gate Valves. Commitments Provided in Attachment 1|letter dated June 23, 1997]], Northeast Nuclear Energy Com>any (NNECO) indicated that it had determined to continue to operate witicut a High Startup Rate (SVR) trip.
The NRC staff approved removal of the SUR trip in Amendment No. 38 to Facility Operating License No. DPR-65 for the Millstone Nuclear Power Station, Unit 2, on April 19, 1978, based on NNECO's reouest, which was supported by Combustion Engineering.
However, as noted in your letter, NNECO informed the NRC in Licensee Event Report (LER) 50-336/96-029-00, dated September 16, 1996, that the removal resulted in Millstone, Unit 2, operating outside the assLmptions of its safety analysis during Cycles 2 and 3.
It was further indicated in the supplemental LER 50-336/96-029-01, dated June 3, 1997, that additional investigation confirmed that the unit was operated outt.ide the assumptions of its safety analysis for Cycles 1 and 2.
A subsecuent analysis performed by Siemens Power Corporation (SPC), which was approvec by the NRC, recognized the removal of the SVR trip and did not credit it for protection from a control element assembly (CEA) withdrawal event initiated from suberitical conditions. However, as the result of the followup investigations, NNECO determined that two errors existed in the SPC analysis and requested that SPC perform a new analysis, which was provided to the NRC staff as an enclosure to the "B16339, Submits Update to Response to RAI Question 3 Re GL 95-07, Pressure Locking & [[Topic" contains a listed "[" character as part of the property label and has therefore been classified as invalid. of SR Power-Operated Gate Valves. Commitments Provided in Attachment 1|June 23, 1997, letter]].
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August 19, 1997 Neil S. Carns As a followup action to the LERs, the NRC staff reviewed SPC's revised analysis of the control element assembly withdrawal event from low power or subcritical conditions.
The results of the review confirms that the operation of Millstone, Unit 2, without the startup rate trip continues to be acceptable to the NRC.
The supporting Safety Evaluation is enclosed.
This completes our effort on TAC No. M99266.
l Sincerely, Original signed by:
Daniel G. Mcdonald Jr., Sr. Project Manager Special Projects Office - Licensing Office of Nuclear Reactor Regulation Docket No. 50-336
Enclosure:
As stated cc w/encis:
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I Neil S. Carns As a followup action to the LERs, the NRC staff reviewed SPC's revised analysis of the control element assembly withdrawal event from low power or suberitical conditions. The results of the review confirms that the operation of Millstone, Unit 2, without the startup rate trip continues to be acceptable to the NRC.
The supporting Safety Evaluation is enclosed.
This i:ompletes our effort ori TAC No. M99266.
Sincerely, a
.s s
Daniel G. Mcdonald Jr., Sr. Project Manager Special Projects Office - Licensing Office of Naclear Reactor Regulation Docket No. 50-336
Enclosure:
As stated cc w/encis:
See next page-l
T Northeast Nuclear Energy Company Millstone Nuclear Power Station Unit 2 CCI Mr. F. C. Rothen Lillian M. Cuoco. Esquire Vice President - Work Services Senior Nuclear Counsel Northeast Nuclear Energy Company Northeast Utilities Service Company P. O. Box 128 P. O. Box 270 Waterford, CT 06385 Hartford, CT 06141-0270 Ernest C. Hadley, Esquire Mr. John Buckingham 1040 B Main Street Department of Public Utility Control P.O. Box 549 Electric Unit West Wareham, MA 02576 10 Liberty Square New Britain, CT 06051 Mr. D. M. Goebel Vice President - Nuclear Oversight Mr. Kevin T. A. McCarthy, Director Northeast Nuclear Energy Company Monitoririg and Radiation Division P. O. Box 128 Department of Environmental Protection Waterford, CT 06385 79 Elm Street Hartford, CT 06106-5127 Mr. M. L. Bowling, Jr.
Recovery Officer - Millstone Unit 2 U.gional Administrator, Region 1 Northeast Nuclear Energy Company Re S. Nuclear Regulatory Commission P. O. Box 128 475 Allendale Road Waterford, CT 06385 King of Prussia, PA 19406 Mr. J. K. Thayer First Selectmen Recovery Officer - Nuclear Engireering Town of Waterford and Support Hall of Records Northeast Nuclear Energy Company 200 Boston Post Road P. O. Box 128 Waterford, CT 06,*t85 Waterford, CT C6385 Mr. Wayne D. Lanning Mr. B. D. Kenyon Deputy Director of Inspections President and Chief Special Projects Office Executive Officer 475 Allendale Road Northeast Nuclear Energy Company King of Prussia, PA 19406-1415 P. O. Box 128 Waterford, Connecticut 06385 Charles Brinkman, Manager Washington Nuclear Operations Mr. Allan Johanson, Assistant-Director ABB Combustion Engineering Office of Policy and Management 12300 Twinbrook Pkwy, Suite 330 Policy Development and Planning Rockville, HD 20852 Division 450 Capitol Avenue - MS# 52ERN Senior Resident inspector P. O. Box 341441 Millstone Nuclear Power Station Hartford, CT 06134-1441 c/o U.S. Nuclear Power Station P.O. Box 513 Niantic, CT 06357
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Northeast Nuclear Energy Company Millstone Nuclear Power Station-Unit 2 cci Citizens Regulatory Commission ATTN Ms. Susan Perry Luxton 180 Great Neck Road Waterford, Connecticut 06385 Deborah Katz, President
-Citizens Awareness Network P. 0.' Box 83 Shelburne Falls, MA 03170 The Honorable Terry Concannon l
Co-Chair Nuclear Energy Advisory Council Room 4035 Legislative Office Building Capitol Avenue Hartford, Connecticut 06106 Mr. Evan W. Woo 11acott Co-Chair Nuclear Energy Advisory Council 128 Terry's Plain Road Simsbury, Connecticut 06070 Little Harbor Consultants, Inc.
Millstone - ITPOP Project Office P. O. Box 0630 Niantic, Connecticist 06357-0630 Mr. Daniel L. Curry Project Director Parsons Power Group Inc.
2675 Morgantown Road Reading, Pennsylvania 19607 Mr. Don Schopfer Verification Team Manager Sargent & Lundy 55 E. Monroe Street Chicago, Illinois 60603
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