ML20005G750

Submits Response to NRC Bulletin 88-008,Suppl 3, Thermal Stresses in Piping Connected to Rcs. Unisolable Piping Sections Connected to RCS at Facility Not Subj to Stresses from Temp Stratification or Oscillations

ML20005G750
Person / Time
Site:	Seabrook
Issue date:	01/11/1990
From:	Feigenbaum T PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
IEB-88-008, IEB-88-8, NYN-90011, NUDOCS 9001230031
Download: ML20005G750 (2)

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.NeW Hampshire:

Ted C. Fi * -

Senior Vice President and Chief Operating Officer NYN-90011 4

i January 11, 1990 UniOd States ' Nuclear Regulatory Coannission I

s Washington,.DC. 20555' fAttention: Documetit-Control Desk' fReferencess; (a) Facility Operating License NPF-67, Docket No. 50-443 (b)'NRC'Bulletin 88-08 Supplement 3.fdated' April 11, 1989,-

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" Therma 1 Streases:in Piping; Connected;to. Reactor Coolant Systems' (c).PSNH1 Letter NYN-88130 dated September 30, 1988. ' Response.

to NRC Bulletin 88-08," G. S. Thomae to USNRC (d) PSNH Letter NYN-88162 dated December 27~.1988,'" Request 1

~for Additional Information Concerning NRC'Bulletin 88-08,'

G. S. Thomas to USNRC-

Subject:

Information-Regarding NRC~ Bulletin 88-08,. Supplement 3:-

' Gentlemen:

p In-References (c) and (d), New Hampshire Yankee (NHY) described 1

actions taken in response to NRC Bulletin 88-08.s.This letter provides'

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information describing actions taken to date in. response to:NRC Bulletin-88-08, Supplement'3.'

New Hampshire Yankee has reviewed NRC Bulletin ~88-08, Supplement 3.

An engineering evaluation ^has concluded that;unisolable^ piping sections, connected to the Reactor Coolant System (RCS) at Seabrook-StationLUnit.1 are not subject to stresses from temperaturo stratification or' temperature oscillations.resulting from the mechanism described.in Supplement 3.

New Hampshire Yankee does not. plan any further action regarding NRCy Bulletin 88-08, Supplement 3..

If you have any questions on this matter please contact Mr. Geoffrey y

A Kingston at (603),474-9521'.

Very truly youro.

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9001230031 900111 R

- Ted C. Feigenbaum gDR~ ADOCK0500g3

- New Hampshire Yankee Division of Public Service Company of New Hampshire

-i P.O. Box 300

• Seabrook, NH 03874

• Telephone (603) 474-9521

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> United States Nuclear Regulatory Commission-January 11, 1990 Attention: ' Document Control Desk Page 2 cc Mr. William T. Russell

-Regional Administrator United States Nuclear Regulatory Commission

-Region I 475 Allendale Road King _of Prussia,'PA~ 19406-Mr.lVictor Nerses, Project Manager-Project Directorate I-3 United States Nuclear Regulatory Commission Division of Reactor Projects Washington, DC 20555 NRC Senior Resident' Inspector

.P.O. Box 1149-Seabrook,' NH 03874 3

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