ML17334B694

LER 98-005-00:on 980122,screw Heads in Ice Condenser Ice Melt Sys Trash Filter Was Noted.Investigation Into Condition Continues,Update to Interim LER Will Be Submitted by 980331. W/980223 Ltr

ML17334B694
Person / Time
Site:	Cook
Issue date:	02/23/1998
From:	Sampson J, Schoepf P AMERICAN ELECTRIC POWER CO., INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LER-98-005, LER-98-5, NUDOCS 9803050070
Download: ML17334B694 (3)

Text

CATEGORY ly REGULAORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9803050070 DOC.DATE: 98/02/23 NOTARIZED: NO DOCKET FACIL:50-315 Donald C. Cook Nuclear Power Plant, Unit 1, Indiana M 05000315 AUTH. NAME AUTHOR AFFIL1ATION SCHOEPF,P. American Electric Power Co., Inc.

SAMPSON,J.R. American Electric Power Co., Inc.

RECIP.NAME RECIPIENT AFFILIATION

SUBJECT:

LER 98-005-00:on 980122,screw heads in ice condenser ice melt sys trash filter was noted. Investigation into condition continues, update to interim LER will be submitted by 980331.

W/980223 ltr.

DISTRIBUTION CODE: IE22T COPIES RECEIVED:LTR I ENCL t BISE:

TITLE: 50.73/50.9 Licensee Event Report (LER), Incident Rpt, etc.

NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD3-3 PD 1 1 STANG,J 1 1 INTERNAL: 2 2 AEOD/SPD/RRAB 1 1 ILE CENTER 1 1 NRR/DE/ECGB 1 1 1 1 NRR/DE/EMEB 1 1 NRR/DRCH/HHFB 1 1 NRR/DRCH/HZCB 1 1 NRR/DRCH/HOLB 1 1 NRR/DRCH/HQMB 1 1 NRR/DRPM/PECB 1 1 NRR/DSSA/SPLB 1 1 NRR/DSSA/SRXB 1 1 RES/DET/EZB 1 1 RGN3 FILE 01 1 1 D EXTERNAL: L ST LOBBY WARD 1 1 LITCO BRYCE, J H 1 1 0 NOAC POORE,W. 1 1 NOAC QUEENER,DS 1 1 NRC PDR 1 1 NUDOCS FULL.TXT 1 1 E

N NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE. TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRIBUTION LISTS OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT THE DOCUMENT CONTROL DESK (DCD) ON EXTENSION 415-2083 FULL TEXT CONVERSION REQUIRED TOTAL NUMBER OF COPIES REQUIRED: LTTR 24 ENCL 24

American Electric Po~

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Gee Ccck P'ace Bregrnan ') I 4"-'".6 ANERlCAN ELECTRIC POWER February 23, 1998 United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Operating Licenses DPR-58 Docket No. 50-315 Document Control Manager:

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i b>>hdby i big CF .>> il ~UE 98-005-00 Sincerely, J. R. Sampson Site Vice President lmbd Attachment A. B. Beach, Region III E. E. Fitzpatrick P. A. Barrett S. J. Brewer R. Whale D. Hahn Records Center, INPO NRC Resident Inspector 9803050070 980223 PDR ADOCK 050003i5 IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII 8 PDR

NRC FORM 366 .S. NUCLEAR REGULATORY COMMISSION PPROVED BY OMB NO. 3150-0104 (5-92) EXPIRES 5/31/95 ESTIMATED BURDEH PER RESPONSE TO COMPLY WITH THI INFDRMATIDH coLLEGTIDN REDUEsT: 50.0 MRs. FDRNAR LICENSEE EVENT REPORT (LER) COMMENTS REGARDING BURDEN ESTIMATE TO TH IHFORMATION AND RECORDS MAHAGEMENT BRANCH (MNB 7714), U.S. NUCLEAR REGULATORY COMMISSION/

'iiASHING'ION, OC 20555-000'I, AND TO THE PAPERWOR REDUCTION PROJECT (3150.0104), OFFICE OF MANAGEMENT AND BUDGET 'iiASHINGTON DC 20503.

FACILITY NAME (I) DOCKET NUMBER (2) Page 1 of1 Donald C. Cook Nuclear Plant - Unit 1 50.315 TITLE (4)

Interim LER - Lack of Adequate Number of Screws in Ice Basket Coupling Rings Determined to Constitute Unanal zed Condition EVENT DATE 5 LER NUMBER 6 REPORT DATE 7 OTHER FACILITIES INVOLVED 8 SEOUEHTIAL REVISION FACILITY HAME DOCKET NUMBER DAY YEAR YEAR MONTH NUMBER NUMBER MONTH DAY Cook - Unit 2 50-316 FACILITY HAME ,DOCKET NUMBER 01 22 98 98 005 00 02 23 98 OPERATING THIS REPORT IS SUBMITTED PURSUANT TO THE REOUIREMEN'IS OF 10 CFR: Check one or mor e 11 MODE (9) 20. 2201(b) 20.2203(a)(3)(I) 50.73(a)(2)(iii) 73.71(b)

POWER 00 20.2203 0 1 20.2203 a 3 ii 50.73 a 2 iv 73.710 LEVEL (10) 20.2203(a)(2)(I) 20.2203(a)(4) 50.73(a)(2)(v) OTHER 20.2203 a 2 ii 50.36 c 1 50.73 a 2 vii (Specify in 20.2203(a)(2)(iii) 50.36(c)(2) 50.73(a)(2)(viii)(A) Abstract beloM and in Text,

. 20.2203(a)(2)(iv) 50.73(a)(2)(I) 50.73(a)(2)(viii)(B) HRC Form 366A) 20.2203(a)(2)(v) X 50.73(a)(2)(ii) 50.73(a)(2)(x)

LICENSEE COHTACT FOR THIS LER 12 NAME TELEPHONE NUMBER (Include Area Code)

Mr. Paul Schoepf, Safety Related Mechanical Engineering Superintendent 616/465-5901 x 2408

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COMPL ETE ONE LINE FOR EACH COMPONENT FAILURE DESCRIBED IN T HIS REPORT 13 REPORTABLE REPORTABLE CAUSE SYSTEM COMPONENT MANUFACTURER CAUSE SYSTEM COMPONENT MANUFACTURER TO HPRDS TO HPRDS SUPPLEMENTAL REPORT EXPECTED 14 EXPECTED MOH'rN DAY YEAR X YES SUBMISSION 03 98 (If yes, complete EXPECTED SUBMISSION DATE).

HO DATE (15) 31 ABSTRACI'Limit to 1400 spaces, i.e., approximately 15 single-spaced typewritten lines) (16)

On January 22, 1998, with Unit 1 in Mode 5, personnel discovered screw heads in the ice condenser ice melt system trash filter. The sheared screws had apparently come from the ice condenser ice basket coupling rings, and the decision was made to conduct inspections of a sample of ice baskets in both units to determine their origin. The inspection identified a number of baskets which were missing more than the allowable numbers of screws at any one coupling ring. This was determined to constitute an unanalyzed condition, and an ENS notification was made on February 14, 1998 at 0800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br /> under 10CFR50.72(b)(2)(ii). This interim LER is submitted in accordance with 10CFR50.73(a)(2)(ii) as an unanalyzed condition found while the reactor was shutdown.

Briefly, each ice basket is approximately 12 inches across and 48 feet long. The original baskets were assembled in 12 foot lengths, using a sheet metal coupling ring. The ring is held in place by 12 screws arranged in 6 pairs. A recent evaluation concluded that a total of 8 screws would be sufficient to ensure that the sheet metal screw design load limits were not exceeded.

The investigation into this condition continues, as does inspection of the Unit 2 ice baskets. Other issues which impacted aspects of the ice condenser and its functions had been identified both before and after the identification of the missing screws. These issues are all being reviewed in parallel to ensure that the cumulative effect of these conditions are evaluated.

It is expected that an update to this interim LER will be submitted by March 31, 1998.