ML20213G084
| ML20213G084 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 11/12/1986 |
| From: | Alexich M INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| AEP:NRC:1012, IEB-86-003, IEB-86-3, IEIN-85-094, IEIN-85-94, NUDOCS 8611170318 | |
| Download: ML20213G084 (3) | |
Text
()F h 016 INDIANA & MICHIGAN ELECTRIC COMPANY P.O. BOX 16631 COLUMBUS,0HIO 43216 November 12, 1986 AEP:NRC: 1012 Donald C. Cook Nuclear Plant Unit Nos. 1 and 2 Docket Nos. 50-315 and 50-316 License Nos. DPR-58 and DPR-74 RESPONSE TO IE COMPLIANCE BULLETIN No. 86-03 Mr. James G. Keppler, Regional Director U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137
Dear Mr. Keppler:
This letter responds to Mr. James M. Taylor's letter of October 8, 1986 entitled "IE Compliance Bulletin No. 86-03:
Potential Failure of Multiple ECCS Pumps due to Single Failure of Air-Operated Valve in Minimum Flow Recirculation Line."
AEPSC reviewed this same subject as reported in IE Information Notice No. 85-94, " Potential for Loss of Minimum Flow Paths Leading to ECCS Pump Damage During a LOCA."
The review investigated the operating and design basis of the residual heat removal, centrifugal charging, and saiety injection pumps' minimum flow systems. The results of this review found the design and administrative controls of the minimum flow systems to be adequate and capable of precluding pump failure due to dead heading during a small-break LOCA. The Donald C. Cook Nuclear Plant utilizes motor-operated (rather than air-operated), fail-as-is valves in the minimum flow recirculation lines. These valves are normally open when the ECCS pumps are required to be operable. We believe this precludes the potential failure of multiple ECCS pumps due to the single failure concerns expressed in IE Compliance Bulletin No. 86-03.
It should be noted that the original design of the minimum flow system for the centrifugal charging pumps had a potential for dead heading both sets of pumps. However, Request for Change (RFC) DC-12-2497 (completed on July 13, 1982) was implemented to modify the system to prevent the possibility of pump damage due to dead heading the centrifugal charging pumps.
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Mr. Jees G. Keppler AEP:NRC:1012 We conclude that the concerns identified in IE cc mpliance Bulletin No.
86-03 as well as IE Information Notice No. 85-94 are not applicable to the Donald C. Cook Nuclear Plant.
Very truly yours,
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. Al ich 'M Vice President 0 MPA/cm cc: John E. Dolan W. G. Smith, Jr. - Bridgman R. C. Callen G. Bruchmann G. Charnoff NRC Resident Inspector - Bridgman
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Mr. Jamss G. Kappler AEP:NRC:1012 STATE OF OHIO COUNTY OF FRANKLIN M. P. Alexich, being duly sworn, deposes and says that he is the Vice President of Licensee Indiana & Michigan Electric Company; that he has read Letter AEP:NRC: 1012, " Response to IE Compliance Bulletin No.
86-03," M. P. Alexich to J. G. Keppler, knows the contents thereof; and that said contents are true to the best of his knowledge and belief.
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M(P.Alexich,VicePresident Subscribed and sworn to me this 12th day of November, 1986, e/
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(Notaff Public)
Nancy Richards Guillod My commission expires 1/8/89 State of Ohio i
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