ML18152A938

Responds to Generic Ltr 88-05 Re Boric Acid Corrosion of Carbon Steel Reactor Pressure Boundary Components.Plant Has Procedural Controls in Place to Accomplish Listed Items. Visual Exams Are Performed to Identify Leak Sources

ML18152A938
Person / Time
Site:	Surry
Issue date:	06/03/1988
From:	Cruden D VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
88-170A, GL-88-05, GL-88-5, NUDOCS 8806140277
Download: ML18152A938 (3)

Text

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 Generic Letter 88-05 June 3, 1988 D.S.CRUDEN VICE PRESIDENT-NUCLEAR United States Nuclear Regulatory Commission Serial No. 88-l?OA Attention: Document Control Desk NO/GDM:pms R2 Washington, D.C. 20555 Docket Nos. 50-280 50-281 License Nos. DPR-32 DPR-37 Gentlemen:

VIRIGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS I AND 2 RESPONSE TO GENERIC LETTER 88-05 NRC Generic Letter 88-05, Boric Acid Corrosion of Carbon Steel Reactor Pressure Boundary Components in PWR Pl ants, requests licensees to provide assurances that a program has been implemented at their facilities to ensure that boric acid corrosion due to leakage will not lead to degradation of the Reactor Coolant Pressure Boundary. This program is to include the following items:

1) Determination of the principal locations where leaks may occur and cause significant boric acid corrosion of the primary pressure boundary.

2) Procedures for locating small cool ant leaks ( i. e leakage rates at less than technical specification limits).

3) Methods for conducting examinations and performing engineering evaluations to establish the impacts on the RCS pressure boundary when leakage is located.

4) Corrective actions to prevent recurrences of this type of corrosion.

Surry Power Station presently has procedural controls in place to accomplish the above items. Specifically, the following activities are performed:

1) Visual examinations are performed of pressure retaining components to identify leakage sources which may cause boric acid corrosion. Certain locations specified for inspection where leakage may occur include valve packing glands, pump seals, and flange gaskets.

2) Procedures are in place for locating coolant leaks and are presently performed each refueling outage. Prior to decontamination of containment, a general containment walkdown is performed to identify any f\oo' l 8806140277 880.603 PDR ADOCK 05000280

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• e boric acid accumulation and/or uni dent i fi ed 1eakage. Corrective act i ans are initiated based on the boric acid 1eakage observed. As an enhance-ment, the procedure documenting this walkdown will be revised to be per-formed each scheduled cold shutdown. Walkdowns are also performed prior to restart to identify/assess any detrimental leakage and to initiate corrective actions as required.

3) An engineering procedure has been implemented to examine and evaluate the effect of boric acid corrosion on safety-related components. This proce-dure analyzes the current as well as the long-term consequences of the corrosion effects. Continued service recommend at i ans are monitored by engineering personnel for follow-up as necessary.

4) Corrective actions identified during the boric acid corrosion evaluation process are addressed through the existing corrective maintenance/design change programs.

Consequently, the program noted above provides assurance that Surry Power Station can adequately identify and address the effects of boric acid corro-sion on the primary pressure boundary.

The information provided in this response is true and accurate to the best of my knowledge. If you have any further questions, please contact us.

cc: U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N. W.

Suite 2900 Atlanta, Georgia 30323 Mr. W. E. Holland NRC Senior Resident Inspector Surry Power Station

COMMONWEALTH OF VIRGINIA)

)

CITY OF RICHMOND )

The foregoing document was acknowledged before me, in and for the City and Commonwealth aforesaid, today by D. S. Cruden who is Vice President - Nuclear, of Virginia Electric and Power Company. He is duly authorized to execute and file the foregoing document in behalf of that Company, and the statements in the document are true to the best of his knowledge and belief.

Acknowledged before me this ~ day of _ _\_,_,_'-'_*~-"=-----' 19~~

My Commission expires: ~-~-~~'-UJ---=~~kY\=.--___.\~~~' 19~

s Notary Public (SEAL)