ML20216C549
| ML20216C549 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 03/10/1998 |
| From: | Mcdonald D NRC (Affiliation Not Assigned) |
| To: | Bowling M NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| TAC-MA0121, TAC-MA121, NUDOCS 9803160066 | |
| Download: ML20216C549 (5) | |
Text
,._
Mr. Martin L Bowling, Jr.
March 10, 1998 Recov:ry Officer-Millstona e
Unit No. 2 Northeast Nuclear Energy Company c/o Ms. Patricia A. Loftus Director-Regulatory Affairs P. O. Box 128 Waterford, CT 06385 l
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION RELATING TO THE REQUEST TO I
AMEND THE TECHNICAL SPECIFICATIONS (TSs) REGARDING THE HEATUP/COOLDOWN CURVES, LOW TEMPERATURE OVERPRESSURE PROTECTION AND VARIOUS TS CORRECTIONS (TAC NO. MA0121)
Dear Mr. Bowling:
By letter dated November 13,1997, as supplemented on December 29,1997, Northeast Nuclear Energy Company (NNECO) requested that the TSs for the Millstone Nuclear Power Station, Unit No. 2, be amended regarding the heatup/cooldown curves, Low Temperature Overpressure Protection, and various TS corrections. The NRC staff is currently reviewing NNECO's request and has determined that additionalinformation is needed to complete its review. The information needed is identified in the enclosure to this letter, if you have any questions relating to this request, please contact me at (301) 415-1408.
Sincerely, Original signed by:
Daniel G. Mcdonald Jr., Senior Project Manager Special Projects Office - Licensing Office of Nuclear Reactor Regulation Docket No. 50-336
Enclosure:
Request for Additional Information f
b cc w/ encl: See next page h
DISTRIBUTION:
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March 10, 1998 Mr. Martin L Bowling, Jr.
Recovery Officer-Millstone Unit No. 2 Northeast Nuclear Energy Company clo Ms. Patricia A. Loftus Director-Regulatory Affairs P. O. Box 128 Waterford, CT 06385 SUBJ ECT: REQUEST FOR ADDITIONAL INFORMATION RELATING TO THE REQUEE F TO AMEND THE TECHNICAL SPECIFICATIONS (TSs) REGARDING THE HEATUP/COOLDOWN CURVES, LOW TEMPERATURE OVERPRESSURE PROTECTION AND VARIOUS TS CORRECTIONS (TAC NO. MA0121)
Dear Mr. Bowling:
By letter dated November 13,1997, as supplemented on December 29,1997, Northeast Nuclear Energy Company (NNECO) requested that the TSs for the Millstone Nuclear Power Station, Unit No. 2, be amended regarding the heatup/cooldown curves, Low Temperature overpressure Protection, and various TS corrections. The NRC staff is currently reviewing NNECO's request and has determined that additionalinformation is needed to complete its review. The information needed is identified in the enclosure to this letter.
If you have any questions relating to this request, please contact me at (301) 415-1408.
Sincerely, L
e Daniel G. Mcdonald Jr., Senior Project Manager Special Projects Office - Licensing Office of Nuclear Reactor Regulation I
Docket No. 50-336
Enclosure:
Request for Additional Information cc w/ encl: See next page i
l Northe st Nuclear En:rgy Comp:ny Millstone Nucle:r Power St: tion
_[
Unit 2 1
cc:
Lillian M. Caoco, Esquire Mr. F. C. Rothen Senior Nuclear Counsel Vice President-Work Services i
Northeast Utilities Service Company Northeast Utilities Service Company P. O. Box 270 P. O. Box 128 l
Hartford, CT 06141-0270 Waterford, CT 06385 Mr. John Buckingham Emest C. Had:ey, Esquire Department of Public Utility Control 1040 B Main Street Electric Unit P.O. Box 549 j
10 Liberty Square West Wareham, MA 02576 New Britain, CT 06051 l
Mr. D. M. Goebel Mr. Kevin T. A. McCarthy, Director Vice President-Nuclear Oversight Monitoring and Radiation Division Northeast Utilities Service Company Department of Environmental Protection P. O. Box 128 79 Elm Street Waterford, CT 06385 l
Hartford, CT 06106-5127 Mr. David Amerine Regional Administrator, Region i Vice President - Nuclear Engineering i
U.S. Nuclear Regulatory Commission and Support 475 Allendale Road Northeast Utilities Service Company King of Prussia, PA 19406 P. O. Box 128 Waterford, CT 06385
[
First Selectmen l
Town of Waterford Mr. Allan Johanson, Assistant Director l
Hall of Records Office of Policy and Menagement l
200 Boston Post Road Policy Development and Planning Waterford, CT 06385 Division 450 Capitol Avenue - MS# 52ERN Mr. Wayne D. Lanning P. O. Box 341441 Deputy Director of Inspections Hartford, CT 06134-1441 Special Projects Office l
475 Allendale Road Mr. M. H. Brothers King of Prussia, PA 19406-1415 Vice President - Operations Northeast Nuclear Energy Company i
Charles Brinkman, Manager P.O. Box 128 Washington Nuclear Operations Waterford, CT 06385 l
ABB Combustion Engineering i-12300 Twinbrook Pkwy, Suite 330 Mr. J. A. Price i-Rockville, MD 20852 Unit Director-Millstone Unit 2 Northeast Nuclear Energy Company Senior Resident inspector P.O. Box 128 Millstone Nuclear Power Station Waterford, CT 06385 clo U.S. Nuclear Regulatory Commission P.O. Box 513 Niantic, CT 06357 j
[
N:rthrst Nucle:r En2rgy C:mprny Millstona Nucirr Power Station l
Unit 2 cc:
Mr. B. D. Kenyon Chief Nucler Officer-Millstone Northeast Nuclear Energy Company P.O. Box 128 Waterford, CT 06385 Citizens Regulatory Commission i
ATTN: Ms. Susan Perry Luxton I
180 Great Neck Road l
l Waterford, CT 06385 l
Deborah Katz, President Citizens Awareness Network l
P. O. Box 83 l
Shelbume Falls, MA 03170 The Honorable Terry Concannon Co-Chair Nuclear Energy Advisory Council l
Room 4035 Legislative Office Building Capitol Avenue I
l Hartford, CT 06106 Mr. Evan W. Woollacott Co-Chair Nuclear Energy Advisory Council 128 Terry's Plain Road Simsbury, CT 06070 Little Harbor Consultants, Inc.
Millstone -!TPOP Project Office P. O Box 0630 Niantic, CT 06357-0630 Mr. Daniel L. Curry Project Director Parsons Power Group !nc.
2675 Morgantewn Road Reading, PA 19607 l
Mr. Don Schopfer Verification Team Manager Sargent & Lundy 55 E. Monroe Street Chicago,IL 60603
REQUEST FOR ADDITIONAL INFORMATION e
PROPOSED TECHNICAL SPECIFICATION CHANGES LOW TEMPERATURE OVERPRESSURE PROTECTION (LTOP) RELATED SYSTEMS MILLSTONE NUCLEAR POWER STATION. UNIT NO. 2 1.
Provide the Appendix G pressure / temperature (P/T) limits to which the LTOP are designed to protect against (i.e., P/T limits under steady state reactor operation, the isothermal curve).
2.
Confirm that the power-operated relief valve (PORV) setpoint of 415 psia is determined with instrumentation uncertainties incorporated.
3.
Provide a tabulation to list PORV setpoint, transient pressure overshot, instrumentation uncertainties, F/T limit, and margin exist for temperatures at 70 *F and 190 *F.
These data should show that the value of the PORV setpoint plus transient pressure increase plus instrumentation uncertainties is still below the P/T limit with sufficient margin at entire temperature range within the area of protection.
4.
Discuss the major assumptions used in your mass addition and energy condition transients in supporting your design of the LTOP. Identify the assumptions that are different from the restrictions in other related TSs.
5.
The enable temperature is defined in Branch Technical Position 5-2 as the water temperature corresponding to a metal temperature of at least RTndt + 90 *F at the beltline location (1/41 or 3/4t). Provide values of the RTndt, instrumentation uncertainties, and the temperature difference between the reactor coolant and the metal at 1/41 due to the temperature gradient between the vessel wall to demonstrate that the proposed enable temperature of 275 F is properly determined with sufficient margin.
6.
Discuss the standard used for determining the instrumentation uncertainties applied in the design of LTOP.
7.
Discuss the technical bases to support the following proposed TSs:
a.
TS 3.1.2.3 and TS 3.1.2.5 - Justify removing the requirement of connecting emergency power to pumps. Describe the TS definition of operable that include the need of emergency power supplies to these pumps.
b.
TS 3.4.1.3 - Confirm that the restrictions stated in the proposed change (insert L) are consistent with the assumption used in the energy addition transient analysis for LTOP design.
c.
TS Table 3.4 Describe the basis of these new limits that are different from the current TSs.
d.
TS 3.5.3 - Provide the basis for removing the requirement to assure only one operable high pressure safety inspection pump when LTOP is required.
8.
Discuss the supporting analysis for the vent size of 2.2 square inch when the reactor coolant system (RCS) temperature is below 190 *F. Also, discuss the required vent size when the RCS temperature is above 190 *F and LTOP is needed.
Enclosure