ML20137R224
| ML20137R224 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 11/19/1985 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| (CDR-85--16), (CDR-85-00-16), SBN-896, NUDOCS 8512050454 | |
| Download: ML20137R224 (3) | |
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Seabrook Stction Enginearing Office Put2c Service of New Hampshire November 19, 1985 New Hampshire Yankee Division SBN-896 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 October 17, 1985, D. E. Groves (YAEC) / M. A. Chiasson (NHY) to A. Cerne (NRC Resident Inspector)
Subject:
Interim 10CFR50.55(e): Manual Handwheel Operator on Dampers Supplied by Pacific Air Products Company (CDR 85-00-16)
Dear Sir:
On October 17, 1985, we reported a potential 10CFR50.55(e) deficiency, Reference (b), regarding manual handwheel operators on safety-related dampers supplied by Pacific Air Products Company. We have completed our evaluation and have determined that the deficiency is reportable.
t Description of Deficiency Several safety-related dampers at Seabrook Station were furnished by l'
Pacific Air Products Company with Contromatics actuators. These actuators were provided with manual operators consisting of a handwheel mounted on a threaded rod which screws into an extended threaded travel stop. Although the primary mode of actuation is pneumatic, manual positioning of the damper with the handwheel operator will override pneumatic actuation.
During the testing phase of the pertinent HVAC systems, these handwheel operators were used occasionally to cycle their respective dampers in the..
absence of pressurized air.
In several cases, the threads in the extended travel;stop fouled causing the operator and damper to seize.
8512050454 851119
{DR ADOCK 05000443 PDR lid [
Seabrook Station Construction Field Office. P.O. Box 700 Seabrook, NH 03874 i
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Attention:
Mr. Richard W. Starostecki Page 2 Safety Implications This handwheel operator design deficiency could have affected plant safety in only one case where system operation depends on the operators i
to perform a safety-related function. This case involves the isolation dampers on the remote makeup air intake lines for the control room. Both dampers automatically isolate their respective intakes upon a high radi-ation signal from either intake. The damper isolating the intake which did not generate the high radiation signal must then be manually opened
-with the handwheel operator. If the operator and damper were to seize in a closed or partially closed position, control room habitability may be affected.
Corrective Action Modifications' recommended by Pacific Air Products to preclude operator /
damper seizure during normal damper cycling are currently being implemented.
We will inform Region I when these modifications are complete.
This le*.ter is being filed pursuant to the interim reporting provisions of 10CFR50.55(e)(3).
Very truly yours, John 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, D. C.
20555 i.
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William S. Jordan, l'.I 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 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 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 (AITN: Tom Burack)
Senator Gordon J. Humphrey Diana P. Randall 1 Pillsbury Street 70 Collins Street Concord, NH 03301 Seabrook, NH 03874 (ATTN: Herb Boynton)
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