ML19308D753

Notifies That Possible Deficiency Reported in 751215 Telcon Now Considered Reportable.Type 316 Stainless Steel Valve Stems Found Bent on Four safety-related Valves.Valve Stems Will Be Changed Using Different Matl

ML19308D753
Person / Time
Site:	Crystal River
Issue date:	01/09/1976
From:	Rodgers J FLORIDA POWER CORP.
To:	Knuth D Office of Nuclear Reactor Regulation
References
NUDOCS 8003130689
Download: ML19308D753 (1)

Text

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'v:t :. Y Fisrida Pw c o.o.....e..r January 9, 1976

'Mr.

Donald F.~Knuth, Director

' Directorate of Regulatory Operations

.iU. S. Nuclear Regulatory Commission

• ' Washington, D.C.

20545

Subject:

50-302 Crystal River Unit #3

Dear Mr. Knuth:

., In accordance with 10 CFR 50.55 (e), we wish to advise you that the possible deficiency reported verbally to you on

. December 17, 1975, is now considered as being verified as

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We presently hav. Jovuiiiei. Lea four valvos in safety-related systems with bent valve stems of Type 316 stainless steel material.

We are

' verifying the possible existence of other similar occurrances.

The manufacturer (Walworth/Aloyco) has advised us that valves with Type 316 stainless steel stems are not suitable for service with quick-closing operators.

We have, therefore, ordered new valve stems for all Walworth and Aloyco valves at Crystal River Unit

1. 3 with operators of 10 seconds or less closing time.

Our new stems will be manufactured from ASTM-A564 Grade 360-COND.-H-ll50-material.

At the present time, delivery dates for the above stems have not been finalized.

It is our opinion that the change to the new material will-eliminate this particular problem.

Very truly yours, l

JTR:1dh J. T. Rodge Assistant Vice President cc:

N. C. Moseley, Director,-Region II 8003130 [# /0 (>Q M.-H. Kleinman g

t General Office 32o1 inntyrurtn street sovin. P O Som 14042. St Petersburg. Florida 33733 e 813-866 5151 C

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