05000271/LER-1983-015-01, /01T-0:on 830608,error Discovered in Spacing Table Developed for Support of Copper Piping in Svc Water Sys.Addl Supports Required to Fully Comply W/Ansi B31.1

/01T-0:on 830608,error Discovered in Spacing Table Developed for Support of Copper Piping in Svc Water Sys.Addl Supports Required to Fully Comply W/Ansi B31.1

ML20024A868
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	06/22/1983
From:	Pelletier J VERMONT YANKEE NUCLEAR POWER CORP.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
LER-83-015-01T, LER-83-15-1T, VYV-83-117, NUDOCS 8307010085
Download: ML20024A868 (3)

LER-1983-015, /01T-0:on 830608,error Discovered in Spacing Table Developed for Support of Copper Piping in Svc Water Sys.Addl Supports Required to Fully Comply W/Ansi B31.1

Event date:
Report date:
2711983015R01 - NRC Website

text

tRC FORM 366 U. S. NUCLEAR REGULATORY CovMISSION (A

LER 83-15/1T LICENSEE EVENT REPORT CONTROL 8 LOCK: l l

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60 61 DOCK ET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h IO [2l l Yankee Atomic Electric Co. (YAEC) informed Vermont Yankee that an error was I

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of copper piping in the Service Water System. The majority of this piping was l

gg installed during the 1981 Refuel Outage. YAEC also informed VY that additional l

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VTVYS1 05000271 LER 83-15/IT ~

EVENT DESCRIPTION AND CORRECTIVE ACTIONS The copper service water pipe support spacing table was determined to be inadequate for three reasons: 1) ANSI B31.1 not properly considered, i

- 2) main service water header induced loads not considered, and 3) concen-trated loads not properly recognized.

Based on 1.5 years experience with i

the existing supports and a full baseline inspection conducted during the current refuel outage, we have concluded that the system is functional, but will require additional supports to fully comply with all aspects of t

B31.1.

Until full compliance is achieved, interim measures will be performed as stated in Confirmatory Action Letter 83-04 dated 6/17/83.

A Request for Extension to the Order for Modification of License for completion of the Torus Long Term Program has been submitted by letter, 3

VYNPC to USNRC, FVY-83-55 dated June 13, 1983. Remaining pipe supports will be designed and installed as required to meet the Order for Modification.

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O VERMONT YANKEE NUCLEAR POWER CORPORATION P. O. BOX 157 GOVERNOR HUNT ROAD VERNON, VERMONT 05354 VYV 83-117 June 22, 1983 United States Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 ATTENTION:

Dr. Thomas E. Murley, Regional Administrator

REFERENCE:

Operating License DPR-28 Docket No. 50-271 Reportable Occurrence No. LER 83-15/1T

Dear Sir:

As defined by Technical Specifications for the Vermont Yankee Nuclear Power Station, Section 6.7.B.:1, we are reporting the attached Reportable Occurrence as LER 83-15/1T.

Very truly yours, ames P. Pelletier Plant Manager IDDt/dre Y'

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