ML20005A080

Interim Rept Re Dimensionally Nonconforming Anchorage Matl,Initially Reported 810505.INRYCO,Inc Conducting Investigation to Determine Criticality of Established Tolerances.Next Rept by 810821

ML20005A080
Person / Time
Site:	Bellefonte
Issue date:	06/05/1981
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8106290352
Download: ML20005A080 (3)

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TENNESSEE VALLEY AUTHORITY. '

CH ATTA NCCG A , TENNESSEE 07401 400 Chestnut Street Tower II

[ ,o June 5, 1981 BLRD-50-438/81-33 BLRD-50-439/81-36 Mr. James P. O'Reilly, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region II - Suite 3100 101 Marietta Street Atlanta, Georgia 30303

Dear Mr. O'Reilly:

BliLLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - DIMENSIONALLY NONCONFORMING '

ANCHORAGE MATERIAL - BLEJ-50-438/81-33, BLRD-50-439/81 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Celenjak on May 5,1981 in accordance with 10 CFR 50.55(e) as NCR's 1447 and 1457. Enclosed is our first interim report. We expect to submit our next report by August 21, 1981.

If you have any questions concerning this matter, please get in touch with D. L. Lambert at FIS 857-2581.

Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Regulation and Safety  :

<5 \ fD 1 Enclosure cc: Mr. Victor Stello, Jr., Director (Enclosure) ,) rh(h[l/

o L k u %f / h i Office of Inspectics and Enforcement t' J[lg g -

U.S. Nuclear Regulatory Commission MhI A S '

Washington, DC 20565 ( u"'Djgnam g

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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 DIMENSIONALLY NONCONFOR E G ANCHORAGE MATERIAL BLRD-50-438/81-33, BLRD-50-439/81-36 10 CFR 50.55(e)

FIRST INTERIM REPORT Description of Deficiency INRYCO, Incorporated, is the contractor for supplying and installing the prestressing system for the primary containments at Bellefonte Nuclear Plant units 1 and 2. On April 15, 1981, INRYC0 *.nformed TVA that a shophead/ bushing failure had occurred during stressing operations oi.

March 19, 1981 at the Braidwood Nuclear Plant and that INRYC0 had submitted a report in accordance with 10 CFR Part 21 to the Nuclear Regulatory Commission to document this failure. As a result of this failure, INRYC0 began measuring the unstressed anchorage material at Bellefonte. Several cases have been documented whereby the dimensions measured do not fall within the tolerances established by the shop fabrication manual. In some instances, the anchorage material is oversized and in other instances, the anchorage material is undersized.

Interim Progress INRYCO is conducting an investigation to determine the criticality of the established tolerances. See attachment A for the established tolerances of the different components. Preliminary information indicates that the tolerances on attachment A are excessively conservative. INRYC0 is finalizing a procedural revision to address the tolerances. (*ntil such a revision is approved, TVA will generate nonconformance reports to document each instance of dimensionally nonconforming anchorage material.

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HAJOR 6.000 5.9875 6.1148' 6.0200 9.3750 9.3625 9.3750 9.3625 9.4678 9.3950 PITCil 5.9054 5.8757 5.9547 5.9250 9.2755 9.242L 9.2755 9.2421 9.3334 9.3000 i .

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