ML20087N133

Second Interim Deficiency Rept Re Cracked & Broken Puffer Piston Rods in Brown Boveri-type 5HK Breakers.Initially Reported on 840119.Insp Revealed Number of Piston Rods W/Hairline Cracks.Final Rept Expected at End of June

ML20087N133
Person / Time
Site:	Seabrook
Issue date:	03/19/1984
From:	Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:	Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
SBN-639, NUDOCS 8404030144
Download: ML20087N133 (3)

Text

.. s

.HN sua m su m Engineedng Office:

IPUE5LIC Companyof New SERVICE Hampshre 1671 Worcester Road Fromingham, Massachusetts 01701 (617) - 872 - 8100 Esrch 19,1984 SBN- 639 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 January 19, 1984, A. L. Legendre (YAEC) to Robert Gallo (NRC, Region I)

(c) PSNH Letter, dated February 14, 1984, " Interim 10CFR50.55(e) Report; Cracked and Broken Puffer Piston Rods in Brown Boveri Type 5HK Breakers"

Subject:

Second Interim 10CFR50.55(e) Report; Cracked and Broken Puffer Piston Rods in Brown Boveri Type 5HK Breakers

Dear Sir:

In Reference (c), we filed an Interim 10CFR50.55(e) Report regarding cracked and broken puffer piston rods in Brown Boveri Type 5HK breakers. We stated that all the 5HK 350 breakers at Seabrook Unit 1 will be inspected for cracked or broken puffer piston rods, and the results of the inspection would determine if further action is required.

The inspection has been completed, and it has revealed a number of puffer piston rods with hairline cracks of varying degrees. Based on these results, it has been decided to replace all the defective rods. The replacement rods are the type recommended by the manufacturer, Brown Boveri Electric.

For conservatism, the plan at present is to replace not only the affected rods but all rods on Unit 1 5HK breakers, even if they do not show defects at the present time.

8404030144 840319 PDR ADOCK 05000443 /

S PDR /p g g

.2 .

l United States Nuclear Regulatory Commission March 19, 1984 Attention: .Mr. Richard W. Starostecki Page 2 i

A final report will be submitted when the replacement of all~ rods has been completed. This is estimated to be towards the end of June 1984.

This letter is being filed pursuant to interim reporting provisions of 10CFR50.55(e)(3).

Very truly yours, j

John DeVincentis Project Manager r

cc: Atomic Safety and Licensing Board Service List Director, Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 I

4 4

_,,,,-,,-,-,,,_-m,v. ,-m..

. . i William S. Jordan, III, Esquire Brentwood Board of Selectmen Harmon & Weiss RED Dalton Road 1725 I Street, N.W. Suite 506 Brentwood, New Hampshire 03833 Washington, DC 20006 Roy P. Lessy, Jr., Esquire Office of the Executive Legal Director Edward F. Meany U.S. Nuclear Regula.ory Commission Designated Representative of Washington, DC 20555 the Town of Rye 155 Washington Road Robert A.- Backus, Esquire Rye, NH 03870 116 Lowell Street P.O. Box 516 Calvin A. Ca.mey Mancehster, NH 03105 City Manager City Hall Philip Ahrens, Esquire 126 Daniel Street Assistant Attorney General Portsmouth, NH 03801 Department of the Attorney General Augusta, HE 04333 Dana Bisbee, Esquire Assistant Attorney General Mr. John B. Tanzer Office of the Attorney General Designated Representative of 208 State House Annex the Town of Hampton Concord, NH 03301 5 Morningside Drive Hampton, Nil 03842 Anne Verge, Chairperson Board of Selectmen Roberta C. Pevear Town Hall Designated. Representative of South Hampton, NH 03842 the Town of Hampton Falls Drinkwater Road Patrick J. McKeon Hampton Falls, NH 03844 Selectmen's Office 10 Central Road Mrs. Sandra Cavutis Rye, NH 03670 Designated Representative of the Town of Kensington Carole T. Kagan, Esq.

RFD 1 Atomic Safety and Licensing Board Panel East Kingston, NH 03827 U.S. Nuclear Regulatory Commission

' " ~

Jo Ann Shotwell, Esquire Assistant Attorrey General Mr. Angie Machiros Environmental Protection Bureau Chairman of the Board of Selectmen Department of the Attorney General Town of Newbury One Ashburton Place, 19th Floor Newbury, MA 01950 Boston, MA 02108 Town Manager's Office Senator Gordon J. Humphrey Town Hall - Friend Street U.S. Senate Amesbury, Ma. 01913 Washington, DC 20510 (Attn: Tom Burack) Senator Gordon J. Humphrey 1 Pillsbury Street Diana P. Randall Concord, NH 03301 70 Collins Street (Attn: Herb Boynton)

SEabrook, NH 03874 Richard E. Sullivan, Mayor Donald E. Chick City Hall

. Town Manager Newburyport, MA 01950 Town of Exeter 10 Front Street.

Exeter, NH 03833 - -

4

- r r-e y - - - - - -,-ve- v,, ,--:=v ,-ew-vve-.---------m--vr,