ML20197B740
| ML20197B740 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 03/03/1998 |
| From: | Stephen Dembek NRC (Affiliation Not Assigned) |
| To: | Bowling M, Loftus P NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| TAC-M97541, NUDOCS 9803110390 | |
| Download: ML20197B740 (5) | |
Text
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Mr. M rtin L. Bowling, Jr.
Recovery Officer - Milletone March 3, 1998 Unit N2. 2 Northeast Nuclear Energy Company c/o Ms. Patricia A. Loftus Director-Regulatory Affairs P. O. Box 128 Waterford, CT 06385
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING TARGET ROCK TWO-STAGE SAFETY / RELIEF VALVES AT M.lLLSTONE, UNIT 1 (TAC NO. M97541)
Dear Mr. Bowling:
In Licensee Event Report 94-012-01, dated August 28,1996, the Northeast Nuclear Energy Company (NNECO) stated that a pressure transmitter actuation logic was added at the Millstone 1 plant that provides a diversified method of ensuring that the safety / relief VMves (SRVs) open within the tolerance designated in the plant Technical "pecificaiions (TS).
However, in recent meetings with the NRQ staff on September 24,1997, and January 15,1998, the Boiling Water Reactor Owners Group (BWROG) stated that there were issues regarding the crediting of power actuation of SRVs for satisfying the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code) pressure re!ief requirements.
in conversations with the NrC staff on May 7 and September 2_4,1997. and January 15,1998, the BWROG stated that the platinum alloy pilot disks installed at several plants, including those installed at Millstone 1, have not provided the necessary improvement to tne setpoint drift l
problems of Target Rock 2-stage SRVs.
Therefore, the staff requests information regarding the ability of Millstone Unit 1 to meet its TS
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requirements regarding SRV setpoint tolerances. Please respond to the enclosed request for additional information within 45 days of receipt.- Please call me at (301) 415-1455 if you have any questions regarding this issue.
Sinc ly, k
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S ep en Dem k, Project Manager Special Projects Office - Licensing i
Office of Nuciaar Reactor Rogulation
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Docket No. 50-245 DISTRIBUTION
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March 3, 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. OT 03385
SUBJECT:
RNUEST FOR ADDITIONAL INFORMATION REGARMNG TARGET ROCK 1WO STAGE SAFETY / RELIEF VALVES AT MILLSTONE, UNIT 1 (TAC NO. M37541)
Dear Mr. Bowling:
In Licensee Event Report 94-012-01, dated August 28,1996, the Northeast Nuclear Energy Company (NNECO) stated that a pressure transmitter actuation logic was added at the Millstone Unit 1 plant that provides a diversified method of ensuring that the safety / relief valves (SRVs) open within the tolerance designated in the plant Technical Specifications (TS).
However, in recent meetings with the NRC staff on September 24,1997, and January 15,1998, the Boiling Water Reactor Owners Group (BWROG) stated that there were issues regarding the crediting of power actuation of SRVs for satisfying the American Society of Mechanical a
Engineers Boiler and Pressure Vessel Code pressure relief requirements.
In conversations with the NRC staff on May 7and September 24,1997, and January 15,1998, the BWROG stated that the platinum alloy pilot disks installed at several plants, including those installed ai Millstone 1, have not provided the necessary improvement to the setpoint drift problems of Target Rock 2-stage SRVs.
Therefore, the staff requests information regarding the ability of M!!! stone Unit 1 to meet its TS requirements regarding SRV setpoint tolerances. Please respond to the enc!osed request for additionalinformation within 45 days of receipt. Pleasa call me at (301) 415-1455 if you have any questions regarding this issue.
Sincerely, j
w Stephen Dembek, Project Manager Special Projects Office - Licensing Office of Nuclear Reactor Regulation Docket No. 50 245
Enclosure:
As stated cc w/ encl: See next page i
\\
REQUEST FOR ADDITIONAL INFORMATION REGARDING SAFETY / RELIEF VALVES AT MILLSTONE UNIT 1 1.
In Licensee Event Report 94-012-01, dated August 28,1996, the Northeast Nuclear Energy Company (NNECO) stated that a pressure transmitter actuation logic was added at the Millstone 1 plant that provides a diversified method of ensuring that the safety / relief valves (SRVs) open within the tolerance designated in the plant Technical Specifications (TS). However, in recent meetings with the NRC staff on Septen.ber 24, 1997, and January 15,1998, the Boiling Water Reactor Owners Group (BWROG) stated that there were issues regarding the crediting of power actuation of SRVs for satisfying
(
the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code) pressure relief requirements. To what extent does NNECO rely on the SRV pressure transmitter actuation logic for opening the SRVs for satisfying the ASME Code pressure relief requirements?
2.
In conversations with the NRC staff on May 7 and September 24,1997, and January 15, 1998, the BWROG stated that the platin'im alloy pilot disks inctalled at several plants, including those installed at Millstone 1, have not provided the necessary improvement to the setpoints of Target Rock 2-stage SRVs. If no credit is taken for the pressure transmitter actuation of the SRVs for pressure relief, how are the SRVs expected to.
remain operable within the required TS setpoint tolerance throughout the operating cycle?
i Enclosure
1 Northzst Nucle:r Energy Company Millstone Nuclear Power Station 1
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Unit 1 Lillien M. Cuoco, Esquire Mr. Wayne D. Lanning Senior Nuclear Counsel Deputy Director of inspections Northeast Utilities Service Company Special Projects Office P. O. Box 270 475 Allendale Road Hartford, CT 06141-0270 King of Prussia, PA 19406-1415 3
Mr. Kevin T. A. McCarthy, Director Mr. F. C. Rothen Monitoring and Radiation Division Vice President - Work Services Department of Environmental Northeast Nuclear Energy Compar'y Protection P. O. Box 128 79 Elm Street Waterforc, CT 06385 Hartford, CT 06106-5127 Emest C. Hadley, Esquire Mr. Allan Johanson, Assistant 1040 B Main Street Director P. O. Box 549 Office of Policy and Management West Wareham, MA 02576 Policy Development and Planning Division Mr. John Buckingham 450 Capitol Avenue - MS# 52ERN Department of Public Utility Contrc4 i
P. O. Box 341441 Electric Unit
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Hartford, CT 06134-1441 10 Liberty Square New Britain, CT 06051 Regional Administrator Region l Mr. David Amerine U.S. Nuclear Regulatory Commission Recovery Officer - Nuclear 475 Allendale Road Engineering and Eupport King of Prussia, PA 19406 Northeast Nuclear Energy Company P. O. Box 128 First Selectmen Waterford, CT 06385 Town of Waterford Hall of Records Senior Resident inspector 200 Boston Post Road Millstone Nuclear Power Station Waterford, CT 06385 clo U.S. Nuclear Regulatory Commission Mr. D. M. Goebel P.O. Box 513 Vice President-Nuclear Oversight Niantic, CT 06357 Northeast Nuclear Energy Company r). O. Box 128 Mr. Bruce D. Kenyon Waterferd, CT 06385 Chief Nuclear Officer-Millstone Northeast Nuclear Energy Company Mr. J. P. McElwain P. O. Box 128 Recovery Officer-Millstone Unit 1 Waterford, Connecticut 06385 Northeast Nuclear Energy Company P. O. Box 128 Waterford, CT 06385 E
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p Northeast Nuclear Energy Comp:ny Millstone Nuclear Power Station Unit 1 cc:
The Honorable Terry Concannon Co-Chair Nuclear Energy Advisory Council Room 4035 Legislative office Building Capitol Avenue Hartford, Ct 06106 Mr. Evan W. Wool!?xtt Co-Chair Nuclear Energy Advisory Council 128 Terr /s Plain Road Simsbury, Ct 06070 Citizens Regulatory Commission ATTN: Ms. Susan Perry Luxton 180 Great Neck Road Waterford, Ct 06385 Deborah Katz, President Citizens Awareness Network P. O. Box 83 Shelbume Falls, MA 03170 Little Harbor Consultants, Inc.
Millstona -ITPOP Project Office P. O. Box 0630 Niantic, Ct 06357-0630 Mr. Daniel L. Curry Project Director Parsons Power Group Inc.
2675 Morgantown Road Reading, PA 19607 Mr. Don Schopfer Verification Team Manager Sargent & Lundy 55 E. Monroe Street Chicago, IL 60603
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