ML20116L212
| ML20116L212 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 05/01/1985 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| SBN-797, NUDOCS 8505030530 | |
| Download: ML20116L212 (3) | |
Text
.
9 SEABROOK STATION I
Engineering Office Pubic Service of New Hampdiire May 1, 1985 SBN-797 New Hampshire Yonkee Division T.F.
E5.1.2 United States Nuclear Regulatory Commission Washington, D. C. 20555 Attention:
Mr. George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) Letter, dated June 22, 1984, " Request for Approval to Implement ASME B&PVC Case N-368", J. DeVincentis to G. W. Knighton (c) USNRC Letter, dated July 30, 1984, "Use of ASME Code for the Seabrook Station Units 1 and 2", G. W. Knighton to R. J. Harrison (d) USNRC Letter, dated October 6, 1984, "Use of ASME Code Case N-368 for the Seabrook Station Units 1 and 2",
G. W. Knighton to R. J. Harrison
Subject:
Use of ASME Code Case N-368
Dear Sir:
In your letter, dated July 30, 1984 [ Reference (c)], it was stated that the NRC conditionally approved our request [Re fe rence (b)] for authorization to use ASME Code Case N-368 for application in the pressure testing of piping associated with the discharge side of ASME Code Class 2 and 3 centrifugal pumps. Subsequent to the staff's approval for its use at the Seabrook Station, the staff informed us that a Westinghouse 10CFR21 Report, regarding a possible overpressure condition in the Component Cooling Water Systems designed by Westinghouse, could have an impact on our use of the code case.
In your letter, dated October 6,1984 [ Reference (d)], we were requested to evaluate the relevance of the Westinghouse 10CFR21 Report to those fluid systems which utilize Code Case N-368.
The incident described in the Westinghouse report involved the isolation of the Component Cooling Water System head tank vent valve due to a signal from radiation detectors. The Seabrook Primary Component Cooling Water System (PCCW) head tanks have an open vent line which cannot be isolated, thus precluding a similar occurrence.
850503055K) 850501 PDR ADOCK 05000443 PDR.
S P.O. Box 300 Seabrook. NH 03874. Telephone (603) 474-9521 h
J
F1 United States Nuclear Regulatory Commission Attention:
Mr. George W. Knighton Page 2 Additionally, we.have.no intention of applying this code case to PCCW
' pump testing, and the only application for which this code case has been
- currently utilized was the testing of the Safety Injection (SI) pumps. The SI-pumps'can experience a pressurized suction only during the recirculation mode. The discharge piping of 'the SI pumps is designed to accommodate this pressurized suction condition plus the discharge head of the pump.
Therefore, the Seabrook SI pumps which utilize this code case will not experience the potential overpressure condition reported in the Westinghouse 10CFR21 Report. In the event' where in the future we elect to utilize this code case again, we will assure that the particular piping system design would accommodate any additional head should a similar scenario to the Westinghouse CCW design situation. exist.
-Should you or your staff have any questions regarding this response, please feel free to contact us.
Very truly y urs, N
J. DeVincentis, Director Engineering and Licensing cc: Atomic Safety and Licensing Board Service List l
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.4 William S. Jordan,-III Donald E. Chick Diane Curran Town Manager Harmon, Weiss & Jordan Town of Exeter 20001 S. Street, N.W.
10 Front Street
. Suite 430-Exeter, NH 03833 Washington, D.C.
20009 Brentwood Board of Selectmen Robert G. Perlis RED Dalton Road Office of the Executive Legal Director Brentwood, NH 03833 U.S. Nuclear Regulatory Commission Washington, DC 20555 Richard E. Sullivan, Mayor City Hall Robert A. Backus, Esquire Newburyport, MA 01950 116 Lowell Street P.O._ Box 516 Calvin A. Canney Manc hester, NH 03105 City Manager City Hall Philip Ahrens, Esquire 126 Daniel Street Assistant Attorney General Portsmouth, NH 03801 Augusta, ME 04333 Dana Bisbee, Esquire
,Mr. John B. Tanzer Assistant Attorney General Designated Representative of Office of the Attorney General the Town of Hampton 208 State House Annex 5 Morningside Drive Concord, NH 03301 Hampton, NH 03842 Anne Verge, Chairperson Roberta C. Pevear Board of Selectmen Designated Representative of Town Hall the Town of Hampton Falls South Hampton, NH 03827 Drinkwater Road Hampton Falls, NH 03844 Patrick J. McKeon Selectmen's Office Mrs. Sandra Gavutis 10 Central Road Designated Representative of Rye, NH 03870 the Town of Kensington RFD 1 Carole F. Kagan, Esquire East Kingston, NH 03827 Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Jo Ann Shotwell, Esquire Washington, DC 20555 Assistant Attorney General Environmental Protection Bureau Mr. Angi Machiros Department of the Attorney General Chairman of the Board of Selectmen One Ashburton Place, 19th Floor Town of Newbury Boston, MA 02108 Newbury, MA 01950 Senator Gordon J. Humphrey Town Manager's Office U.S. Senate Town Hall - Friend Street Washington, DC 20510 Amesbury, MA 01913 (ATTN: Tom Burack)
Senator Gordon J. Humphrey Diana P. Randall 1 Pillsbury Street 70 Collins Street Concord, NH 03301 Seabrook, NH 03874 (ATTN: Herb Boynton)