ML20087B767

Inservice Insp Program,Refueling Outage 2. Insp Verified Integrity of Sys & Components

ML20087B767
Person / Time
Site:	Surry
Issue date:	11/25/1975
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20087B752	List: ML20087B748 ML20087B767
References
ISI-75-6, NUDOCS 8403090361
Download: ML20087B767 (3)

Text

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INSERVICE INSPECTION PROGRAM REFUELING OUTAGE NO. 2 _

SURRY POWER STATION UNIT NO. 1 NOVEMBER 25, 1975 1

REPORT NO. ISI 75-6 DOCKET NO. 50-280 LICENSE NO. DPR-32 t

1 VIRGINIA ELECTRIC AND POWER COMPANY Vepco I

8403090361 PDR ADOCK o

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o o I. INTRODUCTION In accordance with the requirements of Technical Specification 6.6.C, this report contains a summary of the preliminary results of the inservice inspection activities performed during Refueling Outage No. 2 of Unit No. I at the Surry Power Station.

II. SU10MRY OF RESULTS The inservice inspections performed during the period covered by this report included the basic areas listed below:

1. Low head safety injection system piping located in valve pit (Item 7.2 of Technical Specification 4.2).

2. Steam generator tube eddy curre'nt inspections.

Low Head Safety Injection System Piping in Valve Pit The low head safety injection system piping located in the valve pit was visually inspected. No significant indications were noted. Arc strikes were removed by grinding.

Steam Generator Tube Eddy Current Inspections Eddy current inspections of the steam generator tubes were performed in accordance with Regulatory Guide 1.83. As a result of these inspections a , number of tubes were plugged.

The eddy current inspections and tube gauging indicate that localized tube diameter reductions have occurred in the steam generators. These reductions have been caused by " denting."

Because of the generic nature of " denting" it will not be discussed herein.

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Although significant " thinning" and " denting" of tubes have been experienced, their integrity has been caintained and they are capable of performing their design function.

III. CONCLUSIONS The results of the inservice inspections performed verified the integrity of the systems and components examined.

Based on the results of the inservice inspection program, as summarized herein, the safety systems and components inspected have not experienced significant degradation and there is reasonable assurance that they will continue to perform their design functions.

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