ML20028F957

Final Deficiency Rept for Condition 73 Re Concrete & Grout Work.Initially Reported on 801117.All Grout Types & Installations Found Unsuitable in Process of Being Replaced. Grout Placement Consolidated to One Contractor

ML20028F957
Person / Time
Site:	Columbia
Issue date:	01/21/1983
From:	Matlock R WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
10CFR-050.55E, 10CFR-50.55E, G2-83-61, GO2-83-61, NUDOCS 8302070231
Download: ML20028F957 (2)

Text

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'. Docket No. 50-397

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50.55 (c) Report II

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Washington Public Power Supply System , . , ,

P.O. Box 968 3000 GeorgeWashingtonWay Richland, Washington 99352 (509Q7,2g i Docket No. 50-397 N/2:oe

^

January 21, 1983 '

G02-83-61 Mr. R. H. Engelken Regional Administrator  :

U.S. Nuclear Regulatory Commission .

Region V 1450 Maria Lane, Suite 210 .

Walnut Creek, California 94596  :

l

Subject:

NUCLEAR PROJECT NO. 2 10CFR50.55(e) REPORTABLE CONDITION #73 DEFICIENCIES IN INSTALLED GROUT

Reference:

Telecon QA2-80-474, R. T. Johnson to D. Haist, dated November 17, 1980 In accordance with the provisions of iOCFR50.55(e), your office was in- i formed, by telephone, of the above subject reportable condition on Novem-ber 17, 1980. Attachment A provides the Project's final report on this subject.

If there are any questions concerning this subject, please contact Roger Johnson, WNP-2 Project QA Manager, at 377-2501, extension 2712.

/

R. G. Matlock Y

Program Director, WNP-2 LCF/kd cc: W.S. Chin, BPA A. Forrest, Burns and Roe - HAPO N.D. Lewis, NRC J. Plunkett, NUS Corp.

A. Toth, NRC Resident Inspector - 917Q Document Control Desk, NRC WNP-2 Files, 917B 9

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• ,' ~7 WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT N0. 2 DOCKET NO. 50-397 LICENSE N0. CPPR-93 CONCRETE AND GROUT WORK l

10CFR50.55(e) CONDITION NO. 73 l

FINAL REPORT Potential Problems It was determined that the Contract 215 contractor performed Quality Class I grouting on safety-related hanger baseplates, using sand / cement grout without proper material traceability and quality control measures, including material testing and documentation. When the required documentation could not be located, the Architect / Engineer directed that a field testing program be initiated to determine the suitability of the in-place sand / cement grout by retrieving samples of the grout and testing them for compressive strength.

The results of this Phase I program indicated a generic deficiency in the sanc'/ cement grout.

S_afety Implication Low compressive strengths resulting from the improper installation of grout, if left uncorrected, could cause a failure, jeopardizing the function of safety-related equipment.

Approach to Resolution of the Problem To determine if this deficiency was limited to sand / cement grout or Contract 215 installation of this and other grout, the program was expanded to in-clude an investigation of the various types of grout employed at WNP-2 as well as other contractors who performed grouting work. A Phase 11 field testing program was then initiated based on the information gathered. When the results were analyzed, the sample population was not large enough to permit a conclusion as to the adequacy of grout or its installation. There-fore, a decision was made to perform a Phase III random sample inspection using a plan similar to that allowed by IE Bulletin 79-02.

Current Statut The Phase III evaluation program has been completed. All grout types and grout installatior.s found unsuitable have been identified, documented on nonconformance reports, and are in the process of being replaced. All sup-porting documentation for the microcoring program is available for review at the site.

Action to Prevent Recurrence Grout placement has been consolidated under one contractor, Peter Kiewit Sons, Inc. Procedures have been reviewed and strenghtened by the Architect /

Engineer where required to ensure that there are no recurrences of past problems.