ML20237D182
| ML20237D182 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 08/20/1998 |
| From: | Andersen J NRC (Affiliation Not Assigned) |
| To: | Bowling M NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| TAC-MA2035, NUDOCS 9808250119 | |
| Download: ML20237D182 (5) | |
Text
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J August 20, 1998 L.
i Mr. Martin L. Bowling, Jr.
Recovery Officer - Technical Services Northeast Nuclear Energy Company c/o Ms. Patricia A. Loftus Director-Regulatory Affairs P. O. Box 128 Waterford, Connecticut 0C385
SUBJECT:
MILLSTONE NUCLEAR POWER STATION, UNIT 3 - REQUEST FOR ADDITIONAL INFORMATION (TAC NO. MA2035)
Dear Mr. Bowling:
In a June 6,1998, letter, Northeast Nuclear Energy Company (NNECO) requested a license amendment to revise the Mwotone Unit 3 licensing basis related to operation of the d
l supplementary leak collection and release system after a postulated accident.
In order for the staff to complete its review of NNECO's request, the staff requires additional information. Please respond to the enclosed request for additional information as soon as possible. Should you have any questions, please contact me at (301) 415-1437.
Sincerely, Original signed by:
James W. Andersen, Project Manager Special Projects Office - Licensing
~ Office of Nuclear Reactor Regulation Docket No. 50-423 Ensiosure: Request for Additional Information cc w/ encl: See next page DISTRIBUTION l
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% *****j August 20, 1998 Mr. Martin L. Bowling, Jr.
Recovery Officer - Technical Services Northeast Nuclear Energy Company c/o Ms. Patricia A. Loftus Director-Regulatory Affairs P. O. Box 128 Waterford, Connecticut 06385
SUBJECT:
MILLSTONE NUCLEAR POWER STATION, UNIT 3 - REQUEST FOR ADDITIONAL INFORMATION (TAC NO. MA2035)
Dear Mr. Bowling:
In a June 6,1998, letter, Northeast Nuclear Energy Company (NNECO) requested a license amendment to revise the Millstone Unit 3 licensing basis related to operation of the supplementary leak collection and release system after a postulated accident.
In order for the staff to comp,0te its review of NNECO's request, the staff requires additional information. Please respond to the enclosed request for additionalinformation as soon as possible. Should you have any questions, please contact me at (301) 415-1437.
Sincer ly, f
a es W. Andersen, Project Manager Special Projects Office - Licensing Office of Nuclear Reactor Regulation Docket No. 50-423
Enclosure:
Request for Additional Information cc w/ encl: See next page l
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0 REQUEST FOR ADDITIONAL INFORMATION MILLSTONE NUCLEAR POWER STATION. UNIT 3 l
DOCKET NO. 50-423 l
1.
Proposed revision to Final Safety Analysis Report Section 6.4.3, states in part that, in the i
event of a loss-of-coolant accident (LOCA), operators are credited with securing selected l
non-nuclear safety grade (NNS) fans within 20 minutes following at least 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> of operation in the pressurization mode. After 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, control room ventilation can be realigned from pressurization to recirculation mode. Describe what evaluations were performed to verify that the operating crews were capable of successfully performing the required actions to stop the selected fans within the 20-minute time frame specified.
2.
Describe the indications and controls (including location) that are relied upon by the operators (1) to determine that the fans must be isolated, and (2) to accomplish the required actions. For any actions taken outside of the control room, describe the j
presumed environmental conditions to which an operator would be subjected (heat, humidity, lighting, radiological, etc.), and describe how potential barriers to successful I
l operator performance were considered and dispositioned.
3.
Describe any procedural modifications that were implemented to direct the operators to l
secure the NNS fans, and describe the training that was provided to the operators.
4.
What is the conditional probability of the initiating events (i.e., LOCA without loss of offsite power) that would require the operator to perform the NNS fan isolations. Dercribe what consequences would result if the operators were incapable of isolating the NNS fans within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and 20 minutes.
5.
Describe what other breakers or controls important to safety are in close proximity (i.e.,
adjacent to or within the normal reach of the operator) to the NNS fan controls. If these other breakers or controls were inadvertently manipulated, describe what, if any, effects it could have on the successful mitigation of the event.
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Enclosure
1 Millstona Nucircr Power Station Unit 3 cc:
Lillian M. Cuoco, Esquire Joseph R. Egan, Esquire t
Senior Nuclear Counsel Egan & Associates, P.C.
Northeast Utilities Service Company 2300 N Street, NW P. O. Box 270 Washington, DC 20037 I
Hartford, CT 06141-0270 j
Mr. F. C. Rothen j
Mr. Kevin T. A. McCarthy, Director Vice President - Work Services j
Monitoring and Radiation Division Northeast Utilities Service Company l
Department of Environmental Protection P. O. Box 128 l
79 Elm Street Waterford, CT 06385 Hartford, CT 06106-5127 Emest C. Hadley, Esquire Regional Administrator, Region i 1040 B Main Street U.S. Nuclear Regulatory Commission P.O. Box 549 475 Allendale Road West Wareham, MA 02576 King of Prussia, PA 19406 Mr. John Buckingham First Selectmen Department of Public Utility Control Town of Waterford Electric Unit Hall of Records 10 Liberty Square 200 Boston Post Road New Britain, CT 06051 Waterford, CT 06385 Mr. James S. Robinson, Manager Mr. Wayne D. Lanning NuclearInvestments and Administration Deputy Director of Inspections New England Power Company Special Projects Office 25 Research Drive 475 Allendale Road Westborough, MA 01582 King of Prussia, PA 19406-1415 Mr. John Streeter Mr. M. H. Brothers Recovery Officer - Nuclear oversight Vice President - Millstone Unit 3 Northeast Utilities Service Company Northeast Nuclear Energy Company P. O. Box 128 P.O. Box 128 Waterford, CT 06385 Waterford, CT 06385 Deborah Katz, President Mr. M. R. Scully, Executive Director Citizens Awareness Network Connecticut Municipal Electric P.O. Box 83 Energy Cooperative Shelbume Falls, MA 03170 30 Stott Avenue Norwich, CT 06360 Mr. Allan Johanson, Assistant Director Office of Policy and Management Mr. David Amerine Policy Development and Planning Vice President - Human Services Division l
Northeast Utilities Service Company 450 Capitol Avenue - MS# 52ERN P. O. Box 128 P. O. Box 341441 Waterford, CT 06385 Hartford, CT 06134-1441 I
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1 Millstone Nucirr Power Stition Unit 3 cc:
The Honorable Tony Concannon Mr. William D. Meinert Nuclear Energy Advisory Council Nuclear Engineer Room 4035 Massachusetts Municipal Wholesale Legislative Office Building Electric Company Capitol Avenue P.O. Box 426 Hartford, CT 06106 Ludlow, MA 01056 Mr. Evan W. Woollacott Attomey Nicholas J. Scobbo, Jr.
Co-Chair Ferriter, Scobbo, Caruso, Rodophele, PC Nuclear Energy Advisory Council 1 Beacon Street,11th Floor 128 Terry's Plain Road Boston, MA 02108 Simsbury, CT 06070 Citizens Regulatory Commission Mr. John W. Beck, President ATTN: Ms. Susan Perry Luxton Little Harbor Consultants, Inc.
180 Great Neck Road Millstone -ITPOP Project Office Waterford, CT 06385 P.O. Box 0630 Niantic, CT 06357-0630 Mr. B. D. Kenyon (Acting)
Chief Nuclear Officer-Millstone Northeast Nuclear Energy Company P.O. Box 128 Waterford, CT 06385 Mr. Daniel L. Curry Project Director Parsons Power Group inc.
2675 Morgantown Road Reading, PA 19607 Mr. Don Schopfer l
Verification Team Manager f
Sargent & Lundy J
55 E. Monroe Street Chicago,IL 60603
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Mr. P. D. Hinnenkamp Director-Unit 3 Northeast Nuclear Energy Company P.O. Box 128 Waterford, CT 06385 Senior Resident inspector Millstone Nuclear Power Station clo U.S. Nuclear Regulatory Commission P. O. Box 513 Niantic, CT 06357 I
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