ML20151W158
| ML20151W158 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 09/10/1998 |
| From: | Andersen J NRC (Affiliation Not Assigned) |
| To: | Bowling M, Loftus P NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| TAC-MA2021, NUDOCS 9809150200 | |
| Download: ML20151W158 (5) | |
Text
September 10, 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 NO. 3 - REQUEST FOR ADDITIONAL INFORMATION (TAC NO. MA2021)
Dear Mr. Bowling:
In a June 5,1998, letter, Northeast Nuclear Energy Company (NNECO) requested a license amendment to revise the Millstone Unit 3 licensing basis related to the steam generator tube rupture (SGTR) analyses. The SGTR analyses described in the Final Safety Analysis Report include an offsite dose analysis and a margin to overfill analysis. Both of the analyses have been updated. The offsite dose analysis was updated to reflect a larger capacity for the steam generator atmospheric dump valve, and the margin to overfill analysis was updated to reflect a new single failure.
In order for the staff to complete its review of NNECO's amendment request, the staff requires additionalinformation. Please respond to the enclosed request for additionalinformation as soon as possible. Should you have any questions, please contact me at (301) 415-1437.
Sincerely, originalSi8nedDYi James W. Andersen, Project Manager Millstone Project Directorate Division of Reactor Projects - 1/ll Office of Nuclear Reactor Regulation Docket No. 50-423 DISTRIBUTION Docket File OGC
Enclosure:
PUBLIC ACRS Request for Additional Information MSPD RF JDurr,RI WDean DScrenci,RI cc w/ encl: See next page JAndersen LBerry DOCUMENT NAME: G:\\andersen\\a2021.ral I
To receive copy of document indicate in box: "C" Copy w/o enci "E" Copy w/enci "W" No copy OFFICE MSPD-PM MSPD-LA (h.
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NAME J.ANDERSEN V~
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09/p/98 OFFICIAL' RECORD COPY 9009150200 980910 PDR ADOCK 05000423 p
REQUEST FOR ADDITIONAL INFORMATION MILLSTONE NUCLEAR POWER STATION. UNIT 3 DOCKET NO. 50-423
- 1. Describe simulator and emergency operating procedure training related to a potential steam generator tube rupture (SGTR).
- 2. Discuss operating crew simulator results showing that the postulated SGTR accident can be mitigated within a period of time compatible with overfill prevention, using design-basis assumptions regarding available equipment and its impact on operator response times.
- a. Provide the information requested in Table 1 for each operating crew participating in the demonstration runs (can be provided in a different format, if appropriate).
Table 1 Operator Action Assumed Time Demonstrated (mins.)
Time (mins.)
Identify and isolate ruptured steam generator 16.50 mins.
Initiate cooldown 8.00 mins.
from isolation Initiate depressurization 3.00 mins. from reactor coolant system cooldown completed Initiate safety injection termination 3.00 mins.
after depressurization completed Total 30.50 mins.
Enclosure
_ _ _ _.. _ _.. _. ~
. b. Complete Table 2 for each operating crew participating in the demonstration runs that failed to meet the total assumed time of 30.50 minutes.
Table 2 i
Crew Total Demonstrated Time Margin to Overfill (minutes)
(cubic feet) 1
- c. Describe the information required by the control room staff to determine that the ruptured J
steam generator's atmospheric dump valve is open; include the instrumentation used to diagnose the situation and to verify that the required action has been successfully taken.
- d. Describe the operator actions that must be completed to close the block valve of the ruptured steam generator's atmospheric dump valve. Do all the required actions to close the block valve occur in the control room?
- e. Provide assurance that operators can identify that the ruptured steam generator's atmospheric dump valve is open and then can close the associated block valve within the required time of 20 minutes, j
- 3. State the expected time period for obtaining the sample results and discuss the effect on the duration of the accident if the emergency operating procedures specify steam generator (SG) sampling as a means of identifying the SG with the ruptured tube.
l 1
e
Millstone Nuclur Powrr Strtion l
Unit 3 cc:
Lillian M. Cuoco, Esquire Joseph R. Egan, Esquire Senior Nuclear Counsel-Egan & Associates, P.C.
Northeast Utilities Service Company 2300 N Street, NW P. O. Box 270 Washington, DC 20037 Hartford, CT 06141-0270 Mr. F. C. Rothen i
Mr. Kevin T. A. McCarthy, Director Vice President -Work Serv)ces Monitoring and Radiation Division Northeast Utilities Service Company i
Department of Environmental Protection P. O. Box 128 79 Elm Street Waterford, CT 06385 i
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 i
Town of Waterford Electric Unit Hall of Records 10 Liberty Square 200 Boston Post Road New Britain, CT 06051 Waterford, CT 06385 i
Mr. James S. Robinson, Manager Mr. Wayne D. Lanning, Director Nuclear Investments and Administration Millstone Inspections New England Power Company Office of the Regional Administrator 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 Shelburne 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 Northeast Utilities Service Company 450 Capitol Avenue - MS# 52ERN P. O. Box 128 P. O. Box 341441 Waterford, CT 06385 Hartford, CT 06134-1441
Millstone Nucinr Pow;r Station Unit 3 cc:
The Honorable Terry Concannon Attorney Nicholas J. Scobbo, Jr.
Nuclear Energy Advisory Council Ferriter, Scobbo, Caruso, Rodophele, PC Room 4035 1 Beacon Street,11th Floor Legislative Office Building Boston, MA 02108 Capitol Avenue Hartford, CT 06106 Citizens Regulatory Commission ATTN: Ms. Susan Perry Luxton Mr. Evan W. Woollacott 180 Great Neck Road Co-Chair Waterford, CT 06385 Nuclear Energy Advisory Council 128 Terry's Plain Road Simsbury, CT 06070 Mr. John W. Beck, President Little Harbor Consultants, Inc.
Millstone - ITPOP Project Office
- 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. P. D. Hinnenkamp
' Director - Unit 3 Northeast Nuclear Energy Company P.O. Box 128 Waterford, CT 06385 Senior Resident inspector Millstone Nuclear Power Station c/o U.S. Nuclear Regulatory Commission P. O. Box 513 Niantic, CT 06357 Mr. William D. Meinert Nuclear Engineer Massachusetts Municipal Wholesale Electric Company P.O. Box 426 Ludlow, MA 01056
. -.