ML20035C214
| ML20035C214 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 03/29/1993 |
| From: | Colburn T Office of Nuclear Reactor Regulation |
| To: | Orser W DETROIT EDISON CO. |
| References | |
| GL-92-04, GL-92-4, TAC-M84279, NUDOCS 9304060340 | |
| Download: ML20035C214 (3) | |
Text
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NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 205554001
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March 29, 1993 Docket No. 50-341 Mr. William S. Orser Executive Vice President - Nuclear Generations Detroit Edison Company 6400 North Dixie Highway Newport, Michigan 48166
Dear Mr. Orser:
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SUBJECT:
RESPONSE TO GENERIC LETTER 92-04
- RESOLUTION OF THE ISSUES RELATED TO REACTOR VESSEL WATER LEVEL INSTRUMENTATION IN BOILING WATER REACTORS" (TAC NO. M84279)
Mer acknowledges receipt of your response to Generic Letter (GL) des September 28, 1992. GL 92-04 was issued by letter dated
, 1992, to all operating Boiling Water Reactor (BWR) Licensees.
.etter 92-04 requested licensees to promptly assess the impact on
.aci1 ties of potentially erroneous level indication due to non-4
+ ansible gases, and to implement compensatory measures and long term
. corrective actions as necessary.
We find acceptable:
(1) Detroit Edison Company (Deco) review and acceptance of the BWR Owners' l
Group (BWROG) generic analysis as being applicable to the Fermi-2 facility.
4 (2) The BWROG in a letter dated August 12, 1992, provided its schedule and plans for actions to address postulated errors in BWR water level instrumentation.
It is our understanding that Deco endorses that plan for the Fermi-2 facility.
(3)
In a letter dated August 19, 1992, the BWROG's Emergency Procedures Committee provided guidance for operator action in the event of level indication errors due to non-condensible gases during reactor pressure vessel (RPV) depressurization. We understand that you have endorsed this 1
guidance for fermi-2 and have sensitized your operators to these potential errors consistent with the BWROG guidance.
1 (4) You have committed to implementing long term corrective actions which would include plant modifications during RF0 4 for Fermi-2, currently scheduled to begin in March of 1994. We find this schedule acceptable. f i
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PDR ADOCK 05000341; p
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Mr. William S. Orser March 29, 1993
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t Me request that you identify the specific corrective actions /
modifications for your facility and the schedule for implementation (if
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different than RF0 4), by July 30, 1993.
+
On October 23, 1992, the BWROG approved refined operator guidance developed.by the Emergency Procedures Committee, sent to your Operations Superintendent on October 16, 1992, for response to instrument errors due to non-condensible gases. We feel that this guidance provides appropriate information for i
operators to adequately identify and deal with potentially. inaccurate RPV level instrumentation, and expect that this or equivalent guidance, has been incorporated into your station operations.
Should our understanding of your position on any of the items above be incorrect, please contact us as soon as possible.
Should you have any questions, please contact me at (301) 504-1341.
Sincerely, l
Timothy G. Colburn,. Sr. Project Manager Project Directorate 111-1 Division of Reactor Projects - III/IV/V l
Office of Nuclear Reactor Regulation Q1STRIBUTION
% Docket di.le r PDIII-l r/f NRC & Local PDRs JRoe JZwolinski LMarsh PShuttleworth TColburn OGC ACRS(10)
EGreenman, RIII oSEE PREVIOUS CONCURRENCE
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PD:PDIII-l OFFICE LA:PDIII-l*
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NAME MShuttleworth TColburn @ JClifford RJdes LMarsh
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DATE 03/18/93 3 /26/93 3/19/93 (f/Zi/93
~3 42t /93 ORIGINAL OFFICE COPY G:\\WPDOCS\\ FERMI \\GL9204.LTR
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l Mr. William Orser Fermi-2 Detroit Edison Company CC*
John Flynn, Esquire Senior Attorney Detroit Edison Company 2000 Second Avenue Detroit, Michigan 48226 Nuclear Facilities and Environmental Monitoring Section Office-Division of Radiological Health Department of Public Health 3423 N. Logan Street P. O. Box 30195 Lansing, Michigan 48909 Mr. Wayne Kropp U.S. Nuclear Regulatory Commission Resident Inspector Office 6450 W. Dixie Highway Newport, Michigan 48166 Monr>e County Office of Civil Praparedness 963 South Raisinville Monroe, Michigan 48161 e
Regional Administrator, Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. A. Cecil Settles Director - Nuclear Licensing Detroit Edison Company Fermi-2 6400 North Dixie Highway Newport, Michigan 48166
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