ML19209A033

Final Rept for Deficiency 78/01 Re Duplication of Radiograph Identification Numbers by Atwood & Morrill Co,Inc.Caused Incommplete Film Package of Check Valves for High Pressure Core Spray Sys.Documentation Changes Will Correct Problem

ML19209A033
Person / Time
Site:	Grand Gulf
Issue date:	07/28/1978
From:	MISSISSIPPI POWER & LIGHT CO.
To:
Shared Package
ML19209A031	List: ML19209A030 ML19209A033
References
NUDOCS 7910010809
Download: ML19209A033 (1)

Text

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l FIIIAL 1:EPORT II;COMPI.ETE FADf 0GRAPillC FII.M PACKAGE

, POTEtiTIAL REPORTAHbE DEFICIEliCY !'O. 78/01 I: Description of the Deficiency:

A review of one (1) 14" Check Valve, which was procured for the High Pressure Core Spray System, indicated that film identi fication numbers 7 to 8 and 10 to 11 were duplicates. Duplication of the radiographs was determined by indications on the weld bevel configuration, therefore resul ting in an inco.nplete film package from the vendor Atwood and Morrill Company, Inc.

'ihe valve was completely re-radiographed, and a defect was found on the inside of the valve body in the nachiaed area of the weld end preparatfon.

The def ect was deep enough to result in a valve body thickness less than the minimum design thickness.

II. Safety Implications:

If the defective valve had been utilized, it could have f ailed du ring normal operation of the plant. A failure of the valve would be similar to a steam line break and would cause the accident. sensors to initiate an emergency < hutdown of the reactor.

III. Corrective Action Taken:

Atwood and Morrill Company, Inc., performed tests, received acceptable results, and verified that all other valves supplied met requirements of the speci fications. 'Ihe nupplier also repaired t he defect ive valve before returning it to the jobsite.

Details of the corrective action taken for chis defic'.ency and documentation regarding action taken to prevent recurrence will be documented in Bechtel's Management Corrective Action Report (MCAR) No. GGNS - 40. This report will include action taken by Atwood and Morrill Co. to prevent recurrence of the deficiency. Upon completion of all corrective action the subject MCAR will be available for tiRC Review.

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