ML20127L848

Interim Potential Deficiency Rept 55-85-03 Re Firewall Structures Fabricated Using Unqualified Matl.Initially Reported on 850404.Investigation Plan Outlined.Final Rept Will Be Filed in 60 Days

ML20127L848
Person / Time
Site:	Clinton
Issue date:	05/03/1985
From:	Hall D ILLINOIS POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
55-85-03, 55-85-3, U-10273, NUDOCS 8505230102
Download: ML20127L848 (3)

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/LLINDIS POWER 00MPANY gjy f} 3 CLINToN POWER STATION, P.O. box 678, CLINTON. ILLINOIS 61127 May 3, 1985 Docket No. 50-451 Mr.! James G. Keppler Regional Administtator

-Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

SUBJECT:

Potential 10CFR50.55(e) Deficiency 55-85-03 Firewall Structures Fabricated Using Unqualified Material

Dear Mr. Keppler:

On April 4,.1985, Illinois Power Company notified Mr. F. Jablonski, NRC Region III (Ref. 'IP memorandum Y-26230 dated April 4,1985) of a potentially reportable deficiency involving firewalls constructed with 7-5/8 inch hollow core concrete masonry units (CMU's) that may not meet the three (3) hour fire resistance rating stated in the Clinton Power Station'(CPS) Fire Protection Evaluation Report (FPER). Our

investigation of this. issue is continuing and this letter-is submitted as an interim: report in accordance with the requirements of 10CFR50.55(e)(3). Attachment A provides the details of our investigation to date.

We trust that this interim report provides you sufficient background information to perform a general assessment of this potentially reportable deficiency and adequately describes our overall approach to resolve this issue.

Sincerely yours, D. . Hall Vice President RLC/ lab Attachment ec: NRC Resident Office Director, Office of I&E, US NRC, Washington, DC. 20555 Illinois Dcpartment of Nuclear Safety INPO Records Center 8505230102 850503 DR ADOCK 05 g1 Mfy 91985' gg).

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w ATTACHMENT A Illinois Power Company Clinton Power Station Docket No. 50-461 Potential 10CFR50.55(e) Deficiency 55-85-03 Firewall Structures Fabricated Using Unqualified Material Interim Report-Statement-of Potential Reportable Deficiency / Background During the Clinton Independent Design Review (1DR) Fire Protection Walkdown, performed by Bechtel, questions were raised regarding the existing documentation for the fire resistance rating of the hollow core concrete.masonary walls constructed at the Clinton Power Station.

Subsequent to the questions raised by the IDR personnel, Sargent & Lundy (S&L) and Illinois Power personnel, performing a similar walkdown during December 1984, requested Baldwin Associates to supply documentation regarding the fire resistance rating of the subject block walls.

Baldwin Associates was unable to supply the requested documentation that would support.the required fire resistance rating indicated on the S&L Architectural Drawings.

The hazard analysis presented in the Fire Protection Evaluation Report is partially based on 7-5/8 inch CMU's meeting a three (3) hour fire rating. Preliminary investigations indicate that the 7-5/8 inch CMU's may have only a two hour fire rating.

Investigation Results/ Corrective Action Illinois Power has prepared and implemented an investigation plan to determine the extent of this deficiency at CPS. The investigation plan includes the following actions:

1. A review of documentation will be performed to determine'the possible cause for purchasing unqualified material.

2. A review of documentation will be performed to determine the quantity of material that was supplied by vendors other than the prime supplier. The physical properties of the material will also be investigated where appropriate.

3. Sargent & Lundy will evaluate the material to determine the fire resistance rating.

Complete corrective action needed to correct the specific problems and to eliminate the root cause(s) to preclude recurrence will be addressed after further background information is evaluated.

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--ATTACHMENT A (continued)  :

1 Safety Implication / Significance l Illinois Power's investigation of this potentially. reportable

~ deficiency is continuing.' The safety-implications and significance will be assessed after further background information has been evaluated. It is. anticipated that approximately sixty (60) days.will be required to

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complete our investigation, determine reportability and to file a final report on the issue.

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