ML20035E572
| ML20035E572 | |
| Person / Time | |
|---|---|
| Site: | McGuire  |
| Issue date: | 04/06/1993 |
| From: | Tucker H DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9304160198 | |
| Download: ML20035E572 (2) | |
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Dukeibuer Company hub hrux PO Bar 2006 Senior lice President Charlot'e, NC2S:01-1006 Nuclear Generation (704)3M-4531 DUKEPOWER April 6, 1993 U.
S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.
C.
20555 i
Subject:
McGuire Nuclear Station, Unit 1 Docket Number 50-369 Deferral of Planned Post-Irradiation Examinations for Test Assemblies The purpose of this letter is to notify the NRC of recent developments which affect Duke Power Company's plans to perform post-irradiation examinations' (PIES) on two advanced cladding assemblies during the McGuire Unit 1 end of cycle (EOC) 8 outage.
I The two assemblies were initially deployed for operation in Cycle 8, and the purpose of the PIES was to obtain first cycle data on the operational characteristics of the assemblies.
Duke's intent to perform the PIES is outlined in the Technical i
Specification change application. (
Reference:
Letter from M.
S.
I Tuckman (Duke) to U.S.
Nuclear Regulatory Commission, Technical i
Specification Change to Allow Use of Demonstration Assemblies, April 18, 1991.) This change was approved on Ocober 31, 1991, as Amendment #127 to McGuire Unit l's Facility Operating License.
l l
During offload of fuel assemblies from the reactor core at EOC 8, a substantial amount of debris was detected in the reactor.
Upon visual inspection of the fuel, a significant amount of debris was also identified in the offloaded fuel assemblies.
B&W Fuel Company (BWFC) has been contracted to remove debris from the off-loaded fuel in the spent fuel pool.
Duke currently intends to perform the fuel-assembly debris removal and previously-scheduled Rod Control -Cluster Assembly (RCCA) examinations prior to Cycle 9 startup.
The length of this work may threaten EOC 8 critical path and interfere with the previously planned PIES.
Both the debris removal and RCCA exams have been assigned a higher priority than the advanced cladding PIE work due j
to their possible impact on future plant operations. Duke does not' consider the EOC 8 PIES to be as high a priority because cladding oxidation is minor over the first cycle of operation'.
Also, PIES for_the advanced cladding assemblies will be performed during the EOC 9 and 10 outages.
These later cycle examinations are considered more important since oxidation will be in a range of greater interest.
930416019e 930406 PDR 'ADOCK 05000369 p
PDR r~m weae L
i do
U.' S. Nr.J1 ear Regulatory Commission April 6, 1993 i
Page 2 Duke does, however, plan to perform visual examinations of the two advanced cladding assemblies during EOC 8.
Should time permit, the PIES will be performed prior to fuel onload.
However, the portable PIE rig inspections may be omitted during EOC 8 should the time associated with the debris removal and RCCA examinations extend to the fuel onload date (currently scheduled for May 4).
Should you have questions or need additional information, please call Scott Gewehr at (704) 382-7581, or Kenny Church at (704) 382-6783.
very truly yours, C } rb g / f, 7 f 4
Hal B.
Tucker I
piex/ sag cc:
Mr. T. A. Reed, Project Manager Office of Nuclear Reactor Regulation
)
U.
S.
Nuclear Regulatory Commission Mail Stop 14H25, OWFN Washington, D.
C.
20555 l
l Mr.
S.
D.
Ebneter, Regional Administrator U.S. Neclear Regulatory Commission - Region II 101 Marietta Street, NW - Suite 2900 Atlanta, Georgia 30323 l
Mr. P.
K. Van Doorn l
Senior Resident Inspector McGuire Nuclear Station Mr. L.
L. Losh Babcock & Wilcox Fuel Company P.
O.
Box 10935 Lynchburg, VA 24506-0935 i