ML20058L245

Informs of Evaluation to Determine If Mod to HPCI Exhaust Line Valve Has Detrimental Effect on Metallurgical Properties of Hinge Arm

ML20058L245
Person / Time
Site:	Monticello
Issue date:	02/14/1975
From:	Larsen C NORTHERN STATES POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20058K782	List: ML20058K776 ML20058L245
References
NUDOCS 9105130420
Download: ML20058L245 (1)

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NOnTHERN S T A T FI S POWER COMPANY hbaticello, tilnnesota 55362 February 14, 1975 -

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't ' ff Mr. J. G. Keppler, Director ,' i-Region III ,

Office of Inspection and P2forcement United States Itxlear Regulato.tv Comission 799 Poosevelt Road G1cn Ellyn, Illir.ois 60137

Dear Mr. F.cppler:

Fa.TImJn ;UCLEAR CD:ERATING PLLT Docket W. 50-263 License No. DPR-22 It has com to our attenti:a that, during the recent refueling cutage, a codification was Ir.ade to f he HPCI Exhaust I.ine Check Valve, HPCI-9, without the apprepriate engineeri.tg analysis and safety review having been perfo: red.

The radification involve 4 tack welding a stiffener to the Itinge am of the valve disc. An evaluat'en is in progress to detomine if the modificatica has had any detrimata'. effect on the metallurgical properties of the hinge am. ,

Yoursverytypy, -

C. E.

Plant Fhnager CEL/a::xn cc: A Girshusso G Charnoff Minnesota Pollution Ccatrol Agency Attn: E A Pryrinn '

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e 9105130420 750210 CF ADOCK 05000263 CF  :

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