ML20010J342

Final Deficiency Rept Re Inadequate Layup of Class I Piping Sys Following Hydrostatic Testing.Corrosion Due to Inadequate Layup Procedures Not Significant.Condition Not Reportable Under 10CFR50.55(e)

ML20010J342
Person / Time
Site:	Columbia
Issue date:	09/10/1981
From:	Matlock R WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, G2-81-282, GO2-81-0282, GO2-81-282, NUDOCS 8109300342
Download: ML20010J342 (2)

Text

.. - 50.55(e) Report Docket No. 50-397 Washington Public Power Supply System P.O. Box 968 3000 GeorgeWashingtonWay Richland, Washington 99352 (509)372-5000 September 10, 1981 G02-81-0282 Docket No. 50-397 Mr. R. H. Engel ken U. S. Nuclear Regulatory Ca nission Y // '

Region V ;97.SEP)g IO8lk Suite 202, Walnut Creek Plaza Es.

1990 North California Boulevard 9 %g }

Walnut Creek, California 94596 4 /

Dear Mr. Engelken:

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Subject:

SUPPLY SYSTEM NUCLEAR PROJECT NO. 2 10CFR50.55(e) POTENTIALLY REPORTABLE CONDITION N0. 132 INADEQUATE LAYUP AFTER HYDR 0 STATIC TESTING

References:

(1) Letter G02-81-15, dated January 23, 1981 to R. H. Engelken, Director NRC Region V, from R. G. Matlock, Program Director, WNP-2 (2) letter G02-81-217, dated July 31,1981 to R. H. Engelken, Director NRC Region V, from R. G. Matlock, Program Director, WNP-2 In accordance with the provisions of 10CFR50.55(e), your staff was informed by telephone on December 22, 1980, of a potenticily reportable condition resulting from inadequate layup of two Class I piping systems following hydrostatic testing. Interim reports of the condition and actions being taken were made to the Commission by the referenced letters. Reference (2) specifically reported the revision of layup procedures to prevent reoccurrence of the condition.

From measurements made on the LPCS system piping, it has been concluded that corrosion due to inadequate layup p.ocedures was not significant.

In all cases the measurements showed the wall thickness to be greater than the minimums allowed in the manufacture of the piping. Although wall thickness measurements have not been completed for the Standby Service Water (SSW) system, a review of the system design indicates the manufacturing minimum allowable wall thicknesses exceed the design minimum wall thickness including the normal 40 year cerracion allowance by 40 mils or more. Basedon,.r.esypgoftheLPCSsystemmeasurements, this excess wall tMcKness is' considered to be more than adequate to accommodate any corrosion which may have occurred.

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Washington Public Power Supply System RH Engelken Page 2 It has been concluded the subject condition would not have affected safe operation of the plant and is therefore not reportable as a 10CFR50.55(e) deficiency.

This letter constitutcs our final report on the subject condition.

Very truly yours, G. to ogram Director, WNP-2 RGM: HLB:cph cc: WS Chir. - BPA JA Forrest - Burns & Roe R0 ND Lewis - EFSEC, Olympia TA Mangelsdorf - Bechtel Site RE Snaith - Burns & Roe, NY V. Stello - NRC E. Beckett - NRC AD Teth - NRC Site E. Wood - NRC WNP-2 Files