ML19263D737

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Submits Addl Info Per 10CFR21 Re 790405 Rept Under Provision of 10CFR50.55(e) Re Surface Rust on Flux Thimble Tubing for Incore Instrumentation.Investigation Revealed Minor Internal Rusting of Tubing
ML19263D737
Person / Time
Site: North Anna Dominion icon.png
Issue date: 04/09/1979
From: Brown S
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-PT21-79-154-000 235, NUDOCS 7904130206
Download: ML19263D737 (2)


Text

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VepCO April 9, 1979 Mr. James P. O'Reilly, Director Serial rio. 235 Office of Inspection & Enforcement PSESC/MLM:adw:mc U. S. ?!uclear Regulatory Commission Region II Docket No. 50-339 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303

Dear Sir:

On April 5, 1979, a report was made under the provisions of 10CFR50.55(e) concerning surface rust on the flux thimble tubing for incore instrumentation.

In accordance witt. the reporting requirements of 10CFR21, the following infonnation is submitted:

A.

flame and address of reporting individual:

Mr. E. A. Baum, Executive Manager Licensing & Quality Assurance Virginia Electric and Poser Company P. O. Box 26666 Richmond, Virginia 23261 B.

Facility, Activity, and/or component affected:

florth Anna Power Station, Unit 2 Surface Rust on Flux Thimble Tubing C.

Name of firm constructing the facility or supplying the component, activity or service:

Westinghouse Electric Corporation P. 0. Box 355 Pittsburgh, Pennsylvania 25230 D.

Description of defect, deficiency, or failure to comply:

The flux thimble tubing for the incore instrumentation was found to have a moderate to heavy coating of rust on exterior surfaces at the time of unpackaging for installation.

Addi-tional investigation by Westinghouse revealed minor internal rusting of tubing as well.

E.

Date of determination of reportability:

April 4, 1979

'304.13c Q )g

9 Mr. James P. O'Reilly sserr no.

2 viscs tuemc eso eo.sta cweua To F.

Similar components, activities, or services:

None.

G.

Corrective action which has been, is being or will be taken, the indi-vidual responsible and the length of time to complete the action:

Westinghouse will replace the flux thimble tubing for incore instrumentation prior to fuel load.

H.

Other information:

None.

Since no other actions will be required to correct the problem described in Section D of this report, we consider this to be the final report under the provisions of 10CFR50.55(e).

Should you require further information, please contact this office.

Very r j yours, F

~

Sam C. Br in, Jr.

Senior Vice President - Power Station Engineering and Construction cc:

Director, Office of Inspection andEnforcement(3)