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Forwards Status of All Deadweight Supports on Seismic Class 1 Lines at Facility.Status of Supports Result of Seismic Reanalysis Program Outlined in 850409 Presentation
	ML20126H616
Person / Time
Site:	Yankee Rowe
Issue date:	04/19/1985
From:	Oliver R; YANKEE ATOMIC ELECTRIC CO.
To:	Varella A; NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
	DCC-VY-85, VYM-94-85, NUDOCS 8506180401
	Download: ML20126H616 (10)
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YANKEE ATOMIC ELECTRIC COMPANY "'fy"l,'o' ' fo','s ,~', '

1671 Worcester Road, Framingham, Massachusetts 01701 1

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, b u J K E 't_ p ' VYM #94/85 W.O. #4100 April 19, 1985 DCC-VY ;L ' /O c -

Mr. A. Varel,la l' 7 y ' i --( J s .!ln6' ///)

Region I ;;a U. S. Nuclear Regulatory Commission IO'Ag 631 Park Avenue King of Prussia, PA 19406

Dear Mr. Varella:

Please find enclosed one copy of a list which provides the status of all the deadweight (including thermal or spring) supports on Seismic Class 1 lines at Vermont Yankee Nuclear Power Station. .The status:of s

,these supports:is,the, result of,our... Seismic Reanalysis Program,. outlined g to you in our presentation,;atJ ramingham on=the 9th of-April,-: 1985. eA.,

" , further . copy.of this, letter and liat has. been sent .to.Mr. H. .Nitzel.

If you have any questions or require any further information please do not hesitate to call.

Very truly yours, WRCN R. P. Oliver Vermont Yenkee Project ah Enclosures h

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STATUS OF DEADWEIGHT PIPE SUPPORTS AT VERMONT YANKEE NUCLEAR POWER PLANT AS A RESULT OF A SEISMIC REANALYSIS PROGRAM l

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INDEX 6

1. DESCRIPTION / PURPOSE OF LIST

2. CROSS REFERENCE CHART

3. STATUS OF DEADWEIGHT SUPPORTS W_

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DESCRIPTION / PURPOSE OF LIST ,

1. The attached list provides the status >of2each,desdweighttpipe' support m f orm all e tho c eeismic e claeo nl-< lines e reanalyzed w in ' Vermont: Yankee 's ' Seismic .

. Reanalysis .Prpgram s (SAP): as t follows ta To be removed - Deadweight support has been determined not to be required as a result of the SRP.

Attached to structural steel - These deadweight supports are attached to building steel or embedded steel plates (steel and plates are evaluated in our SRP).

Function Chnage - These deadweight sopports have Faen combined with a restraint in another direction, have been redesigned as a seismic support.

j Replace with standard base plate - All the hardware of this support remains acceptable - rod, clamp etc., but the base plate and bolts have been redesigned using a standard 1

design (as shown during our audit).

) Replace with custom design base plate - All the hardware of this support i remains acceptable - rod, clamp, etc., but the base plate and bolts have been redesigned using a custom design (for clearance purposes a " standard" base plate design could not be used).

. 2. All, redesigns, use Hilti-Kwik bolts 3and.;a minimum . factor- of;safetyxo f, i

cfour.:and:.considersplate flexibility.

i 3. The Cross Reference Chart provides the mechanism to identify the Piping System from the Pipe Stress Problem Number.

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CROSS REFERENCE CHART PIPE STRESS PROBLEM NO. PIPING SYSTEM 3 Atmospheric Control (AC) Part 5*

4 Core Spray (CS) Part 2A*

4 Core Spray (CS) Part 6A*

4 Radwaste (RW) Part 1*