ML20138P439
| ML20138P439 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 10/11/1985 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| CDR-85--14, CDR-85-00-14, SBN-881, NUDOCS 8511070133 | |
| Download: ML20138P439 (3) | |
Text
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UI SEABROOK STATION Engineering Office Pub 5c Service of New Hampette New Hampshire Yankee Division October 11, 1985 SBN-881 T.F. Q2.2.2 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 Attention:
Mr. Richard W. Starostecki, Director Division of Project and Resident Programs
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) Telecon of September 11, 1985, D. E. Groves /W N. Fadden (YNSD) to John Rogers (Region I)
Subject:
Interim 10CFR50.55(e) Report; Containment Isolation Valves Do Not Seal (CDR 85-00-14)
Dear Sir:
On September 11, 1985, we reported a 10CFR50.55(e) item to Region I
[ Reference (b)]. The following information is provided under the reporting requirements of 10CFR50.55(e).
Description of Deficiency During valve leak rate testing, it was discovered that Containment Isolation Valves NG-FV-4609 and 4610 unseated and leaked. The valves are ASME III, Class 2, solenoid-actuated, globe valves manufactured by Valcor, Inc., of Springfield, New Jersey.
Analysis of Safety Implication These valves provide containment isolation for a non-ASME piping system.
During accident conditions, leaking valves could create a path for fission products from the containment to a non-ASME piping system outside the containment.
8511070133 851011 PDR ADOCK 050 3
S P.O. Box 300 Seabrook NH O3874. Telephone (603)474-9521 0
3 V
4
United States Nuclear Regulatory Commission Attention:
Mr. Richard W. Starostecki Page 2 Status of Investigation We have reviewed the specifications for these valves. The valves were specified to isolate the differential pressure associated with normal flew into the containment. They were not specified for isolation of high reverse differential pressure resulting from an accident.
Valcor informed us that the valve internals will have to be replaced with balanced internals for this application. The balanced internals have been ordered. After the balanced internals are installed, the leak rate test will be repeated.
In addition, we are reviewing all containment isolation valves to ensure they have been properly specified for their safety function.
At the conclusion of the modified valve tests and specification reviews, we will file an additional report.
Very truly yo rs, d,
m-j J. DeVincentis, Director Engineering and Licensing cc: Atomic Safety and Licensing Board Service List Director, Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 i
William S. Jordan, III Donald E. Chick Diane Curran Town Manager Harmon, Weius & 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 Newbu ryport, MA 01950 116 Lowell Street i
P.O. Box 516 Calvin A. Canney Manc hester, NH 03103 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 4
Designated Representative of Office of the Attorney General the Town of Hampton 206 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 Ca role 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 j
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) l l
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