ML17275A811

Interim Deficiency Rept Re Inadequate Layup After Hydrostatic Test,Initially Reported on 801222.Physical Exam & Ultrasonic Tests Will Be Conducted to Determine If Corrosion Encroached Upon Min Wall Thickness

ML17275A811
Person / Time
Site:	Columbia
Issue date:	01/23/1981
From:	MATLOCK R G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	ENGELKEN R H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
10CFR-050.55E, 10CFR-50.55E, GO2-81-15, NUDOCS 8102020490
Download: ML17275A811 (5)

Text

REGULATOR NFORMATION DISTRIBUTION S EM (RIDS)ACCESSION NBR: 8 1 02020490, DOC~DATE t 81/0 1/23 NOTARIZED o NO DOCKEiT'FACIL!50'97 WPPSS Nuc'lear ProJecti Unit 2'i Wash:fngton Public Powe,'05000397 AUTH'NAME'UTHOR A F F IL I ATION MATLOCK<R~G,'ashington Pub)fc Power: Supply System RECIP~NAMEl RECIPIENT AFFILIATION ENGELKENiR<<H.

'egion Si San Francisco'fffce of the~Director~

SUBJECT:

Inter fm deficiency rept re'nadequate layup after.hydrostatic testifnitfally repot ted on 80122?'.Physical exam L ultrasonic tests will be make todetermine if corrosion encroached upon min wall thickness-, DISTRIBUTION CODE: 8019S COPIES RECEIVED:LTR NCL'I E TITLE:: Construction Deficiency Report (fOCFR50;55E)

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IP~p.I p~.Washington Public Power Supply System A JOINT OPERATING AGENCY P.O.BOX 968 3000 GEO.WASHINGTON WAY RICHLAND, WASHINGTON 99352 PHONE{509)372 5000 January 23, 1981 G02-81-15 Docket No.50-397 CPPR-.93 Nuclear-Regulatory Commission Region V Suite 202, Walnut Creek Plaza 1990 North California Blvd.Walnut Creek, California 94596 Attention

Nr.R.H.Engelken, Director Gentlemen:

C/0 j y~l" CO

Subject:

WPPSS Nuclear Project No.2 Potentially Reportable Condition-10CFR50.55(e)

Inade uate Layup After H drostatic Test In accordance, with guidelines established for the reporting of 10CFR50.55(e) conditons, your staff was informed on December 22, 1980, of a potentially reportable condition regarding inadequate layup of piping following hydrostatic testing.Attached is our interim report describing the deficiency and our approach to the resolution of this item.A final or interim report will be submitted by August 1, 1981.Please contact us if you have additional questions.

Very truly yours, RGN:PTH:cph attachment Program Director, WNP2 cc w/att: JJ Verderber-Burns 8 Roe'V-;Stello--NRC AD Toth-NRC Resident Inspector B.Mood-NUS/LIS WS Chin-Bonneville Power Admin.WNP-2 Files p,oI~I I/I WASHINGTON PUBLIC POWER SUPPLY SYSTEM DOCKET NO.50-397 LICENSE NO.CPPR-93 INTERIM REPORT POTENTIALLY REPORTABLE CONDITION INADEQUATE LAYL'P AFTER HYDROSTATIC TEST Statement of Problem: The large bore piping contractor has no defini-tive requirements for the prevention of corrosion--in piping and com-ponents after hydrotesting.

In two systems, specifically Low Pre'ssure Core Spray (LPCS)and Standby Service Water (SW), which contain guality Class I components and piping, water has been allowed to stand in the piping without any layup requirements.

It is apparent that corrosion does exist but to what extent has not yet'een determined.

These systems serve safety related functions for safe shutdown of the plant.Their failure to perform during extreme enviromental or seismic events could result in loss of ability to safely shut down the plant follwoing a Design Basis Accident.Pro osed A roa'ch to Resolution:

A test program is being developed which will investigate portions of LPCS and SW systems which appear or are most likely to have the most severe corrosion.

-A physical exami-nation and ultrasonic tests will be made to several portions to deter-mine if corrosion has encroached upon the minimum wall thickness.

Only after these examinations have been made will it be possible to conclude if this condition is a reportable deficiency under the requirements of 10FR50.55(e).

A final or interim report will be summitted by August 1, 1981.The com-pletion of our evaluation is predicated on the release of the construc-tion hold on guality Class I piping.