ML20112G496
| ML20112G496 | |
| Person / Time | |
|---|---|
| Site: | Mcguire, Catawba, McGuire, 05000000 |
| Issue date: | 12/31/1984 |
| From: | Tucker H DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-84-03, IEB-84-3, NUDOCS 8501160357 | |
| Download: ML20112G496 (2) | |
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t DUKE POWER GoMmNY P.O. IK)x 33180 ollAMLOTTE, N.C. 28242 HAL B. TUCKER TER.EPSIOMM b1h 1964 : 4 9
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. E."/O Dec Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street NW, Suite 2900 Atlanta, Georgia 30323
Subject:
McGuire Nuclear Station Catawba Nuclear Station Docket Nos. 50-369 and 50-370; 50-413 and 50-414 NRC/01E Bulletin 84-03
Dear Mr. O'Reilly:
My letter of November 21, 1984 submitted Duke Power Company's response to NRC/01E Bulletin 84-03 for the McGuire and Catawba Nuclear Power Stations.
This bulletin concerns an incident in which the refueling cavity water seal failed and rapidly drained the refueling cavity, and requested certain actions to assure that fuel uncovery during refueling remains an unlikely event. Our
. response provided a summary of.our evaluation of the potential for and consequences of a refueling cavity water seal failure for the McGuire and Catawba Nuclear Stations.
Although the original seal was designed and tested by the manufacturer establishing.the adequacy of the seal configuration, our. response indicated that a reevaluation of the seal integrity would be conducted via subjecting the seal configuration used at McGuire and Catawba to a series of tests designed to determine the ultimate capacity of the seals (if the minimum acceptance criteria is not met on any test the seal was to be modified as necessary to obtain the required capacity). The response stated that the testing was seneduled to start (at McGuire) the week of November 26 and to be completed the week of December 3, 1984, with the results along with a description of any planned modifications (if necessary) to be provided by December 31, 1984.
However, due to manpower shottages resulting from a McGuire Unit 1 maintenance outage (November 23 through December 24, 1984) and delays in obtaining test seals this testing was actually performed December 17-21, 1984. Test results are currently being evaluated to determine the adequacy of the seals or if modifications.(and therefore further testing) is required, and certain as built measurement data is yet to be obtained. Consequently, results of the evaluation will now be provided by January 31, 1985 (or prior to the McGuire Unit 2/ Cycle 2 refueling outage, whichever is earlier). Preliminary indications are that current (unmodified) seals are adequate for use in the upcoming McGuire refueling outages, although modifications may be necessary prior to une at Catawba.
Very truly yours,-
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Hal B. Tucker PBN/mj f O
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1Mr.(James P. 0'Reilly,' Regional Administrator
. December 31, 1984
'.Page Two
.cc:. Mr.- R. C. DeYoung, Director 0ffice of Inspection and Enforcement U. S.. Nuclear Regulatory Commission Washington, D. C. 20555 Document Control Desk
-U.:S. Nuclear Regulatory Commission Washington, D. C. 20555 Mr. W. T. Orders NRC Resident Inspector McGuire Nuclear Station P. K. VanDoorn NRC Resident Inspector Catawba Nuclear Station d
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