ML20059G320

Forwards Safety Insp Rept 50-412/93-21 on 930830-0903 & 1004-08.No Violations Noted.Recognizes That Licensee Has Taken Special Measures,By Control of Chemistry,To Prevent Erosion/Corrosion

ML20059G320
Person / Time
Site:	Beaver Valley
Issue date:	11/01/1993
From:	Durr J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:	Sieber J DUQUESNE LIGHT CO.
Shared Package
ML20059G323	List: IR 05000412/1993021 ML20059G320
References
NUDOCS 9311080066
Download: ML20059G320 (3)

See also: IR 05000412/1993021

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NOV i 1993

Docket N7. 50-412

Mr. J. D. Sieber

Senior Vice President

Nuclear Power Division I'

Duquesne Light Company

Post Office Box 4

Shippingport, Pennsylvania 15077

Dear Mr. Sieber:

SUBJECT: NRC REGION 1 INSPECTION REPORT NO. 50-412/93-21

This letter transmits the findings of the announced safety inspection conducted by

Mr. P. Patnaik and Ms. C. Beardslee of this office from August 30 - September 3,1993,

and October 4-8,1993, at the Beaver Valley Power Station, Unit 2, Shippingport,

Pennsylvania.

The inspection was directed at areas important to public health and safety and was conducted

in two phases: one just prior to the refuel outage, and the second during the refuel outage.

The first phase of the inspection centered around review of the inservice inspection (ISI)

program, the cosion/ corrosion monitoring program, the scope of work for the outage, and

the procedures. Be second phase of the inspection focused on witnessing inservice

inspection and the steam generator tube examination. The results of this inspection were

discussed with you and the members of your staff at the exit meetings on September 3,1993,

and October 8,1993.

The inspectors found that the number of components selected for erosion /ccrrosion

monitoring was small in relation to the total population of components and was not supported

by analysis using any predictive methodology available to the industry. We recognize that  ;

you have taken special measures, by control of chemistry, to prevent erosion / corrosion.

Notwithstanding these measures, we understand that you are currently evaluating more l

structured methods available in the industry to select components for erosion / corrosion

monitoring. Please provide us your schedule for implementing this expanded program.

The inspectors found, from the review of the chemistry manual, that if the primary-to-  !

secondary leak rate reaches 250 gallons per day, the plant power should immediately be

reduced to less than 50 percent power within an hour. Even though this leak rate is  ;

allowable under your technical specifications and taking into consideration some of the recent I

tube failures at other plants, it may be prudent to reevaluate the conservatism of this leak rate

against a potential tube rupture in the presence of an active degradation mechanism.

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The inservice inspection and the non-destructive examination activities were generally.

planned, controlled and documented properly. No violations were identified during this

inspection. Your cooperation with us in this matter is appreciated.  ;

Sincerely, ,

C/.3i a l a z,.u 'a u- ,

JacqueP,D=T .l

Jacque P. Durr, Chief. l

Engineering Branch

Division of Reactor Safety t

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Enclosure: NRC Region I Inspection Report No. 50-412/93-21 .;

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cc w/ encl:

G. S. Thomas, Vice President, Nuclear Services

D. E. Spoerry, Vice President, Nuclear Operations .l

L. R. Freeland, General Manager, Nuclear Operations Unit

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K. D. Grada, Manager, Quality Services Unit

N. R. Tonet, Manager, Nuclear Safety Department

H. R. Caldwell, General Superintendent, Nuclear Operations

K. Abraham,' PAO (2)

Public Document Room (PDR)

Local Public Document Room (LPDR)

Nuclear Safety Information Center (NSIC) ,

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NRC Resident Inspector

Commonwealth of Pennsylvania 'l

State of Ohio j

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