ML20054F025

Part 21 Rept Re Defective Fan Housings Supplied by Buffalo Forge Co,Initially Reported 810626.Reinforcing Plates Will Be Welded to Existing Housings to Eliminate Possibility of Missile Penetration

ML20054F025
Person / Time
Site:	Clinton
Issue date:	06/03/1982
From:	Gerstner W ILLINOIS POWER CO.
To:	James Keppler, James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
REF-PT21-82-652-000, REF-PT21-82-653-000 PT21-82-652, PT21-82-653, PT21-82-653-000, U-0479, NUDOCS 8206150150
Download: ML20054F025 (3)

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s 16 06-L U-0479 ILL/N0/S POWER COMPANY L16 -82 (06-03 ) -L IP CLINTON POWER STATION, P.O. BOX 679. CLINTON, ILLINOIS 61727 June 3, 1982 Mr. James C. Keppler Director, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Dear Mr. Keppler:

10 CFR Part 21 Defect Buffalo Forge Fans Docket No. 50-4&t/CPPR-137 46t On June 26, 1981, Mr. G.W. Bell of Illinois Power notified Mr. H.M. Wescott, U.S. NRC Region III, of a potential reportable defect per 10 CFR Part 21 regarding certain fan housings supplied by the Buffalo Forge Company. Based upon an evaluation, Illinois Power is notifying the commission of a 10 CFR Part 21 defect.

This report provides information as required by 10 CFR Part 21.21(6)(3).

(i) Robert Jorgensen, Director of Engineering, Buffalo Forge Company, P.O. Box 985, Buffalo, N.Y. 14240, informed the NRC by letter to Mr. Victor Stello, Director of Inspection and Enforcement, on June 10, 1981.

Mr. G.W. Bell of Illinois Power informed Mr. H.M.

Wescott, U.S. NRC Region III by telephone on June 26, 1981 of a potential 10 CFR Part 21 defect.

Mr. W.C. Gerstner, Executive Vice President of Illinois Power, by means of this report hereby informs the commission of a 10 CFR Part 21 defect.

(ii) The components involved are the housings of certain fans produced by Buffalo Forge Company for Clinton Power Station, Clinton, Illinois . The fans involved are listed below.

Equipment No. Building Elevation OVA 04CA, CB Control 825' 0" OVA 05CA, CB Diese] Generator 762' 0" 1VR03CA, CB Contrc' 825' 0" IVR04CA, CB Control 719' 0" (X IVT06CA, CB Control 719' 0" 3 \

IVF03 CA , CB Diesel Generator 762' 0" OVLO2CA, CB Diesel Generator 762' 0" 8206150150 820603 PDR ADOCK 05000461 S PDR

Mr. Jamas C. Keppler Jun: 3,.1982 NRC Page 2 (iii) Buffalo Forge Company P.O. Box 985 Buffalo, N.Y. 14240 (iv) New methods of calculation for missile penetration by the vendor resulted in the determination that the fan housings are not of sufficient thickness to prevent penetration by postulated missiles. The resultant hazard is that safety related. cables in the vicinity of the fans could be damaged by postulated missiles. The potential exists that the reliability of safety systems could be reduced.

(v) Illinois Power was notified on June 17, 1982, by letter from Baldwin Associates (IP Contractor) of the poten-tially reportable defect. Baldwin Associates was notified on June 11, 1981, by letter from Buffalo Forge Company of the potentially reportable defect.

(vi) A total of eighteen (18) fans were_ identified by the vendor as having this defect. Of the eighteen (18) fans, fourteen (14) are located in safety-related areas where postulated missiles could pose a safety hazard.

The identification and location of these fourteen (14) fans are contained in item (ii) of this report.

(vii) The missile hazard will be corrected prior to plant operation. The proposed corrective action is to weld reinforcing plates to the existing housings to elimi-nate the possibility of missile penetration. Design drawings detailing the required corrective action are presently being distributed to Baldwin Associates for implementation, and repairs will proceed in the near future.

(viii) It is Illinois Power's understanding that Buffalo Forge Company is notifying their customers of the potential defect as indicated in their letter to the NRC dated June 10, 1981.

Our evaluation of this reportable defect is available for your review at our offices. I trust that this letter provides sufficient information for your review and analysis of the problem.

Sincerely ,

<t/ w W.C. Gerstner Executive Vice President

m3 Mr. Jamms C. Keppler Juns 3, 1982' NRC Pega 3 cc: H.H. Livermore, USNRC Resident Inspector Director of Inspection and-Enforcement - 3 copies U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Illinois Department .of Nuclear Safety Director-Quality Assurance