U-101988, Interim Part 21 & Deficiency Rept Re ASTM A-36 Plate Matl. Initially Reported on 840803.Investigation Plan Implemented as Listed.Next Rept Will Be Provided in Approx 90 Days

Interim Part 21 & Deficiency Rept Re ASTM A-36 Plate Matl. Initially Reported on 840803.Investigation Plan Implemented as Listed.Next Rept Will Be Provided in Approx 90 Days

ML20097A262
Person / Time
Site:	Clinton
Issue date:	08/30/1984
From:	Hall D ILLINOIS POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
REF-PT21-84-519-000 55-84-18, PT21-84-519, PT21-84-519-000, U-10198, U-101988, NUDOCS 8409130222
Download: ML20097A262 (2)

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16 05-L ILLINO/S POWER OOMPANY y.10198 CLINTON POWER STATION. P.O. dOX 678. CLINTON. ILLINOIS 61727 August 30, 1984 Docket No. 50-461 Mr. James G. Keppler Regional Administrator Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

Potential 10CFR50.55 (e) Deficiency 55-84-18:

ASTM A-36 Plate Material

Dear Mr. Keppler:

On August 3, 1984, Illinois Power Company notified Mr. Jablonski, NRC Region III, (Ref: IP memorandum Y-20732, dated August 3, 1984) of a potentially reportable deficiency

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concerning A-36 plate material. Our investigation of this issue is progressing, and this letter is submitted as an interim report in accordance with the requirements of 10CFR50.55(e)(3).

Sta tement of Potentially Reportable Deficiency / Background Illinois Power has identified certain 15" x 15" x 1/2" A-36 steel plates (Heat No. 8117721, Receipt Inspection Report (RIR)

No. S-12949), whose quality is currently indeterminate. The quality of the A-36 plate material became suspect during mechanical cutting operations by craft personnel. Although the plates were procured safety-related to the requirements of ASTM A-36, retesting has sbown the physical properties (yield and tensile strength) are less than that required by the ASTM A-36 material specification. The Certified Material Test Report (CMTR) from Phoenix Steel Corporation (Claymont, Delaware 19703) which accompanied this material shows that it meets the requirements of ASTM A-36.

Investigation Results/ Corrective Action Illinois Power (IP) has prepared and is implementing an investigation plan to determine the extent of this problem at the Clinton Power Station (CPS). The investigation plan includes:

1. A review will be performed of the material specification /

testing requirements for the suspect A-36 material and other materials received from the same supplier, 8409130222 e40830 DRADOCK05000g 4g q

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. Mr. James G. Keppler Page 2 August 30, 1984

2. A review will be performed to identify all installations which have utilized the suspect A-36 material,4

3. A review will be performed to identify alL' remaining stock of the suspect A-36 material,

4. Further testing will be performed, if appropriate, in order to assess the acceptability of the suspect material, and

5. The data compiled above will be reviewed and evaluated to determine the significance to the safety of operations of CPS.

All installations identified to have utilized the suspect material will be documented on Nonconformance Reports (NCRs) and resolved in accordance with approved site procedures.

All identified remaining stock of the suspect material has been placed on hold pending resolution of this concern.

Safety Implication / Significance Illinois Power Company's investigation of this potentially reportable deficiency is continuing. The safety implications and significance will be assessed after further background information is evaluated. It is anticipated that approximately four (4) months will be required to complete our investigation, I

determine reportability, and to file a final report on the l matter. Illinois Power intends to provide you an update on the i investigation progress in approximately ninety (90) days. I We trust that this interim report provides you sufficient l

background information to perform a general assessment of this potentially reportable deficiency and adequately describes our l overall approach to resolve the issue, i Sincerely yours ,

D. . Hall Vice President RLC/ lag cc: NRC Resident Office, V-690 Director - Office of I&E, US NRC, Washington, DC 20555 Illinois Department of Nuclear Safety INPO Records Center

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