ML19309G099
| ML19309G099 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 03/28/1980 |
| From: | Hines E DETROIT EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-80-03, IEB-80-3, NUDOCS 8005020356 | |
| Download: ML19309G099 (4) | |
Text
7 8005020 3 %
h Edwird Hines As9stant V(e Presdent omotv Assu ance r
Detroit Edison =m1 w 0.g Beaver Hoad e
=m-March 28, 1980 EF2-48,571 Mr. James G. Keppler Regional Director U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Re fe rence :
Enrico Fermi Power Plant, Unit 2 USNRC Licensing Docket: 50-341 USNRC IE Bulletin 80-03 (2-6 '80)
Edison Memorandums EF2-48,434 (3-20 '80) and EF2-48,440 (3-21 '80)
Subject:
Detroit Edison Response to NRC IE Bulletin 80-03
Dear Mr. Keppler:
The enclosed Edison internal memorandums, EF2-48,434 of March 20, 1980, and EF2-48,440 of March 21, 1980, are herein trans-mitted to you in response to IE Bulletin 80-03.
Should you require additional information from Edison in this matter, please advise us.
Very truly yours, Ell /JDR/ak
-r AW d'
Enclosure cc:
Director Office of Inspection and Enforcement Division of Fuel Facility and Materials Safety Inspection U.S. Nuclear Regulatory Commission Washington D.C.
20555 Director Office of Nuclear. Reactor Regulation APg h h Division of Operating Reactors U.S. Nuclear Regulatory Commission Washington D.C.
20555
l Detroit fEdison summmmmmmmmmmmmmmmmes ENRICO FERMI UNIT 2 PROJECT D UINEERIl0 March 21, 1980 EF2 - 48440
'Ib:
F. J. Incke Systan Ergineer - EF2 318 Ergineering Constn:ction-y Fran:
R. C. Anderson Systan Engineer - EF2 318 Ergineering Construction-Troy
Subject:
Insrection of SGTS Rich Ef ficiency Filter _
On March 19, 1980, a vistal inspection was conducted on the SGTS, T4600D001, high efficiency filter housing, to look for a problen identified in IE Bulletin 80-03. Persons conducting the. inspection were R. C. Anderson, J. R. Green, Project Systen Engineers, and H. K. Lathrop, Startup Test Engineer. The charcoal has not been added to the SGIS filter. 'Ihe inspection sh>txl that the high effi-ciency filter has a screen that is held down to the housing by a all rretal bar running along the primeter of the screen. 'Ihe bar is riveted to the frame with a uniform spacing of about 1 inch.
'1ho inspection was through all of the charcoal filliry openings in tha top of the unit. All of the filter screens were inspected to verify that the fabrication nethod was uniform.
RCA/dk cc:
E. Lusis H. K. Iathmp J. R. Green R. A. MacIrod Fran Bames (IE Bulletin 80-03)
Doctm2nt Control (File T46) i I
l
W. F. COLRERT B-
- ^
MAR 2150 Detroit Edison u
_~
h DRICD FERMI URT 2 PROOTLr HEINEERI?U March 20, 1980 EF2 - 48434
'lb:
W. F. Coltert Project Engineer - EF2 318 Engineering Construction-Troy Fran:
F. J. Incke )
Systen Ehyineer - EF2 318 Engi.neering Construction-Troy Referenws:
1.
Enrico Femi Unit 2 - Control Center HVAC (T-41) and SGTS (T-46) 2.
NRC IE Bulletin No. 80-03 g-g, 3.
EF2 = 48314, February 21, 1980
Subject:
Charcoal Filter Adsorber IE 80-03 addresses itself to the loss of charcoal fran Standard Type II Tray Msorber Cells fabricated by Flanders,Inc., prior to 1974. For nuclear facilities under construction, IE 80-03 requests that a visual inspection of any charcoal adsorber cell installations be conducted
~~
to determi.ne if there are deficiencies in the rivet spacing for tM screen / casing attachnent to allcw sufficient separation for any char-coal loss to occur.
For Fermi 2 there are three systems where charcoal adsorber filters am used for the treatment of ventilating air.
A.
CD?7IROL CE? ITER HVAC EMERGENCY MARFUP AND RECIRCULATIBC AIR l
FILTER U!IITS
'Ihe charcoal adsorber cells on th3se two filter units are not i
a Flanders Pfpe II design. Th2y are Type III design by C1'I--
Nuclear. Visual inspection of both units verifies that the l
netted of screen attachrent is by spot welding with the spacing between spot welds being 1/2 to 1 inch. 'Ihere was no evidence of screen separation.
\\
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I' Merro to:
March 20, 1980 W. F. Colbert EF2 - 48434 O
a B.
STAT 0BY GAS 'IREA'1TO7P SYSTEM AIR FILTER UNITS This charcoal filter unit is a Pennwalt CVI design. The method of screen attachment to the casing is with rivets.
Ibwever, an outer batten that covers the full outer perimeter of the screen secures the screen against the msing. These same rivets secure the batten / screen / casing sandwich arrange-nent and are spaced about 1 inch apart. Inspection has revealed no sign of screen information.
C.
REACIOR PRMERE VESSEL HEAD PURGItU UNIT _
This is a nobile portable filter unit tint is used to purge the RPV head prior to and during its removal for refueling.
This filter unit includes a charcoal filter to handle any traces of radiographic gases. Tnis equiptent has no safety significance.
O
'twis eauin" eat has aot vet been meaurecterea eaa aetet1ea design information on the charcoal filter has not yet been released by the manufacturer, Pennwalt CVI. Edison has requested detailed information on the charcoal filter frcm Pennwalt CVI, and will reject any design that is similar to the Flanders Type II design that is under question in IE 80-03.
FJI/dk cc:
E. Lusis R. C. Anderson P. Fessler/Ballinger Docunent Control 6
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