ML20133C125

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Forwards Addl Info & Concerns from Alleger Re Allegation RIII-85-A-0116 Dealing W/Socket Weld Fitup.Results of Review & Disposition of Matter Should Be Submitted to Region III Upon Completion
ML20133C125
Person / Time
Site: Clinton Constellation icon.png
Issue date: 10/01/1985
From: Norelius C
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To: Gerstner W
ILLINOIS POWER CO.
References
NUDOCS 8510070235
Download: ML20133C125 (2)


Text

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OCT 1 S85.

Docket No. 50-461 Illinois Power Company ATTN: Mr. W. C. Gerstner Executive Vice President 500 South 27th Street Decatur, IL 62525 Gentlemen:

In NRC Inspection Report No. 50-461/85032, the Region III inspection of allegation RIII-85-A-0116 dealing with socket weld fitup is documented. Two items of concern were left as one unresolved item (461/85032-02). Since then the NRC has received additional information and concerns from the alleger. The i information is paraphrased in the attached enclosure and is forwarded to Illinois Power Company for review and followup.

We request that the results of your review and disposition of this matter be submitted to Region III after completion. Documentation supporting your results should be maintained onsite for audit by Region III.

Your cooperation with us is appreciated. Should you have any questions with regard to this matter, please call Mr. R. F. Warnick (312) 790-5575.

Sincerely, "Nicir.ai M - M I.f C3. b eT;egr Charles E. Norelius, Director Division of Reactor Projects

Enclosure:

Additional Information and l Concerns Regarding Allegation l RIII-85-A-0116 cc w/ enclosure:

DCS/RSB (RIDS)

Licensing Fee Management Branch Resident Inspector, RIII j Richard Hubbard l Gary N. Wright, Manager Nuclear Facility Safety Jean Foy, Prairie Alliance g ooggg gg g j61 Allen Samelson, Assistant a PDR Attorney General, Environmental Control Division H. S. Taylor, Quality Assurance -

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ENCLOSURE Additional Information and Concerns Received from the Alleger Regarding Allegation RIII-85-A-0116

1. It is possible that many instrumentation lines are almost closed with

" sugar." A thorough flush could not take place. The welding procedure used to weld " Cajon" fittings to .065" wall instrumentation tubing, NP-8-8-BS, was defective. It is not possible to make consistently good welds on this wall thickness using the minimum requirements of this procedure, i.e., 300 F maximum interpass temperature, 50 amps minimum, and no internal purge.

2. Acceptable welds were produced by making the welds in tacks about 1/4" long and cooling with water mist to ambient temperature between tacks.

This method was not used for the bulk of field welding on this material at Clinton.

3. Radiographs of welds 1-IS-912-4,1-CM-905-92Q1,1-CM-905-2Q1,1-CM-905-91, and 1-SM-906-5Q2 revealed severe burn-through and internal restrictions.
4. Minimum wall thickness violations may exist. Training given inspectors on the use of D-meters would result in inaccurate readings (readings that would indicate the material was thicker than actual). The training was not modified after this problem was brought to the attention of BA.