ML20005A626

Interim Deficiency Rept Re Anchor Bolts Which Have Cracked & Separated During Normal Handling,Initially Reported 810529.Bechtel Developing Program to Verify Quality of high-strength Bolts & Nuts.Final Rept Expected by 811215

ML20005A626
Person / Time
Site:	Palo Verde
Issue date:	06/24/1981
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Faulkenberry B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
10CFR-050.55E, 10CFR-50.55E, ANPP-18271-BSK, NUDOCS 8106300513
Download: ML20005A626 (3)

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• PHOCNIX, ARl2SN A 85o36 June 24, 1981 ANPP-18271-BSK/ JAR U. S. Nuclear Regulatory Commission Region V Walnut Creek Plaza - Suite 202 1990 North California Boulevard Walnut Creek, California 94596 Attention: Mr. B. H. Faulkenberry, Chief Reactor Construction and Engineering Support Branch

Subject:

Interim Report A 50.55(e) Potentially Reportable Deficiency Relating to Anchor Bolts Which Have Cracked and Separated During Normal Handling File: 81-019-026 D.4.33.2

Reference:

Telephone Conversation between J. Eckhardt and B. S. Kaplan on May 29, 1981 (DER 81-14)

Dear Sir:

The NRC was notified of a potentially reportable deficiency in the referenced telephone conversation. At that time, it was estimated that a determination of reportability would be made within thirty (30) days.

Due to the extensive investigation and evaluation required, an interim report is attached. It is now expected that this information will be finalized by December 15, 1981, at which time a complete report will be submitted.

Very truly you, .. \

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E. E. Van Brunt, Jr. l APS Vice President 1 Nuclear Projects ANPP Project Director

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1 U. S. Nucicar Regulatory Cocunission Region V Attention: Mr. B.11. Faulkenberry, Chief ANPP-18271-BSK/ JAR June 24, 1981 Page 2 orcement U. S. Nuclear Regulatory Conunission Washington, D. C. 20555 A. C. Gehr Snell & Wilmer R. L. Robb D. B. Pasnacht W. E. Ide J. M. Allen A. C. Rogers J. A. Brand W. H. Wilson W. G. Bingham W. J. Stubblefield R. L. Patterson R. W. Welcher D. R. Hawkinson m

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INTERIM REPORT POTENTIAL REPORTABLE DEFICIENCY ARIZONA PUBLIC SERVICE COMPANY (APS)

PVNGS UNIT 1, 2 AND 3 I. Potential Problem The Palo Verde Project purchases anchor belts from Marathon Steel Company, Phoenix, Arizona, who in turn uses Copper State as a subtier supplier. Copper State uses subtier suppliers as sources of anchor bolts to them.

Four (4) A-354, Grade BD,1 " diameter bolts, used as anchor bolts for the pipe whip restraints in the Containment Building, cracken and separated during normal handling. One of these bolts was then lab tested for chemical and mechanical properties in accordance with ASTM A-354. The bolt passed the chemical, strength and ductility requirements, but exceeded, on the high side, the hardness requirement which is grounds for rejection.

Subsequently, a representative sample consisting of five percent (80) of all remaining A-354, Grade BD, bolts in stock at the jobsite were tested for the hardness requirement. The results showed that 29% (23 out of 80) of these bolts failed with nine (9) high and fourteen (14) low. Of the fourteen (14) that tested low, thirteen (13) of them also failed the tensile test requirements.

II. Approach To and Status Of Proposed Resolution As a result of the identified A-354, Grade BD, bolt failures supplied by Marathon, via their subtier suppliers, Stop k*ura Notice No. 81-SW-4 was issued stopping all concrete placements containing A-354, Grade BD, bolts.

Marathon Steel has issued audit findings requiring that the subtier suppliers correct the identified quality assurance deficiencies.

Bechtel is developing a program to verify the quality of all high strength bolts and nuts used on the jobsite and will develop a definitive action plan based on further testing and evaluations.

III. Projected Completion of Corrective Action and Submittal Date of the Final Report The Marathon /Bechtel analysis, review, disposition and final report of these conditions is forecast to be completed by December 15, 1981.

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