ML20214F977

Part 21 Rept Re New Svc Water Spray Array Sys Supports Supplied by Inland Steel Co.Util Will Provide Positive Identification & Ultrasonic Testing Results of Suspect Matl. Identification Process Will Be Complete by 861201

ML20214F977
Person / Time
Site:	North Anna
Issue date:	11/07/1986
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-PT21-86, REF-PT21-86-368-000 86-753, PT21-86-368, PT21-86-368-000, NUDOCS 8611250510
Download: ML20214F977 (3)

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dh3'FF Dr. J. Nelson Grace Serial No.86-753 Regional Administrator N0/RCB: dmk Region II Docket Nos. 50-338 U. S. Nuclear Regulatory Comission 50-339 101 Marietta Street, Suite 2900 License Nos. NPF-4 Atlanta, Georgia 30323 NPF-7

Dear Dr. Grace:

VIRGINIA ELECTRIC AND POWER COMPANY MURTH ANNA POWER STATION UNITS 1 AND 2 NEW 5ERVICE WAltM SPRAY ARRAY SY5 TEM 10CFR21 REPORT On November 7, 1986, Virginia Electric and Power Company notified NRC Region II of a potential defect involving a substantial safety hazard at North Anna Power Station Unit Nos. 1 and 2.

In accordance with the reporting requirements of 10CFR21, the following information is submitted:

A. Name and address of individual informing the Commission:

Mr. W. L. Stewart, Vice President Nuclear Operations Virginia Electric and Power Company P. O. Box 26666 Richmond, VA 23261 l

l i B. Identification of the facility, the activity, or the basic component which fails to comply or contains a defect:

North Anna Power Station, Units 1 and 2 l

New Service Water Spray Array System Supports (under construction)

C. Identification of the firm supplying the basic component which fails to comply or contains a defect:

Manufacturer: Inland Steel Company 30 West Monroe Street l Chicago, Illinois 60603

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Fabricator: Rockwell Engineering 13500 South Western Avenue Blue Island, Illinois 60406 D. Nature of the defect or failure to comply and the safety hazard which is created or could be created by such defect or failure to comply:

On September 15, 1986 a routine post weld QC inspection initially revealed laminations in the web of a steel column. Rockwell Engineering Co., the seller, was notified along with Inland Steel, Rockwell's subsupplier. Inland stated that the defect is known as " pipe type lamination" or " pipe" which is rarely encountered in finished products.

Inland reviewed the production history of the defective steel (Inland heat number 17802) and informed Virginia Electric and Power company that an ingot poured from heat 17802 could develop " pipe" due to the manufacturing conditions that existed at the time. At that time, Inland believed that the defect was an isolated case.

On October 23, 1986, are-installationultrasonictesting(UT)ofsteel from the sus)ect Inland leat number revealed several additional defective columns. Roc (well Engineering was notified and a non-destructive engineering specialist from Inland Steel visited North Anna on October 28, 1986. The specialist confirmed the findings, verifying that the defect was not an isolated case.

Review of the Rockwell traceability documentation indicated only W10x49 wideflange members were supplied to Virginia Electric and Power Company from Inland heat 17802. W10x49 members were also supplied to the company from other Inland heat numbers as well. However, given the fact that production problems were experienced during Inland heat 17802 coupled with the high level of reliability normally experienced with hot rolled structural steel, the scope of concern over the lamination defects is limited to the material being used from Inland heat 17802.

Positive identification and ultrasonic testing of suspect materials is to be completed by December 1, 1986. At this time, a repair / replacement plan will be developed. A Non-Conformance Report will be written upon completion of the UT program to document resolution of defects.

Members containing defects as described above may not be suitable for use in the safety-related Service Water Spray Array System.

E. The date on which the information of such defect or failure to comply was obtained:

i November 5, 1986 l F. The number and location of all such components in use at, supplied for, or being supplied for one or more facilities or activities subject to the regulations in this part:

The number and location of the affected components at North Anna Power Station will be identified in the aforementioned Non-Comformance Report.

G. Corrective action that has been, is being, or will be taken; the name of the organization responsible for the action; and the length of time that will be taken to complete the action:

Virginia Electric and Power Company will provide positive identification and ultrasonic testing results of the suspect material at the North Anna Power Station. The identification process will be completed by December 1, 1986. Once the total scope of the problem is known, a repair / replacement plan will be developed.

H. Any advice related to the defect or failure to comply about the facility, activity, or basic component that has been, is being, or will be given to purchasers or licensees.

Apart from the information contained in paragraph D above, none.

Should you require further information, please contact me.

Very truly yours.

W. L. Stewart pc: Director,OfficeofInspectionandEnforcement(3 copies)

U. S. Nuclear Regulatory Comission Washington, D. C. 20555 Mr. Lester S. Rubenstein Director PWR Project Directorate No. 2 Division of PWR Licensing-A Mr. J. L. Caldwell NRC Senior Resident Inspector North Anna Power Station

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