ML20005G169
| ML20005G169 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 01/11/1990 |
| From: | Stang J Office of Nuclear Reactor Regulation |
| To: | Sylvia B DETROIT EDISON CO. |
| References | |
| TAC-59610, TAC-75081, NUDOCS 9001180235 | |
| Download: ML20005G169 (4) | |
Text
gy,3 p:..
o p 4e o
- g a me4 j
4 UNITED STATES J
- E NUCLEAR REGULATORY COMMISSION i
n Ij*5 y af wassiwoTow, p. c. 20sss
,o#
January 11, 1990
'l
~ Decket No. 50-341 -
i Mr.. B. Ralph' Sylvia i
' Senior Vice President - Nuclear
+
sk,'
Operations' r
p Detroit Edison' Company-L 6400 North Dixie Highway #
j Newport, Michigan 48166 l
o
Dear Mr. Sylvia:
l
SUBJECT:
CONTROL ROOM EMERGENCY' FILTRATION SYSTEM, LICENSE CONDITION
[
2.C.(7)(TACNOS.59610AND75081) k l
License Condition' 2.C.(7) of Facility Optrating License No NPF-43 for the j
Fermi-2 facility states:
Prior to startup following.the first rufueling outage, Deco shall prcvide assurance to the NRC staff that potentia' contarcinatice pathways tnrough l
W
~ thost portions cf-the control room air-conditioning system which are t
cxternal to the control rocm ::ene will not have a significant adverse imp 6ct on' control room habitability or wilt propose a technical specifi.
4
, cation which provides for periodic leakage testing to assure the integrity 4
j4>
- of those external portions of.the control rooN air-conditioning system,
'The besis for the License Ccoditien is d u cussed in NDRE4 0796 Supplements 5 l and rn " Safety Evaluation Re!cted to the Operation of Fermi 2,g March and July 6
1985.r; Supplement 5 to the Fermi-2 Safety Evaluation Report, section 6.4.1 discusses the basis for the NRC acceptance of the design of the Control Roor EmergencyFiltraticoSystem(CREFS). The staff was concerned, due to the l
use of siliconessealant on portions of the'ductwork external to the control r
L room, whether the ductwork would remain sufficiently leak tight _and continue to Therefore,thestaffincludedLicenseCondition2.C.(yearlifeoftheplant.7)totheFermi-2 lic adequately minimize unfiltered inleakage over the 40 which incorporates the licensee's commitment on this matter.
By letter dated September 27, 1989, Detroit Edison Company (DECO) informed the y
l:
NRC'ofitsplanformeetingLicenseCondition2.C.(7),
c, The licensee originally had planned to replace the existing ductwork with L
ductwork of welded construction in accordance with Regulatory Guide 1.52.
However, the determination was made that little benefit to the sealing characteristics would be-gained by replacen,ent of the ductwork, since the existing ductwork already has welded seams.
l-i
/b M
L L
'9001180235 900111
'PDR ADOCK 05000341 L
l L
PNV L
j
7 yt- ' ( e,,
['
h,'.
j
.o Mr. B. Ralph Sy tta
-2 The licensee's plan is revised as follows:
Certain changes will be n.ade to the existing design to improve the sealing characteristics of the portion of ductwork outside of the control room. The licensee will test the portion of the ductwork external to the control room j
_which will experience r.egative pressure to ensure infiltration criteria are met during the first refueling outage. An appropriate periodic test interval will L
be established. The pressure decay increase method will be used for the test.
]
By letter dated November 3,1989, Deco provided the test results talen during the current refueling outage as required by License Condition 2.C.(7).
By letter dated November 16, 1989. the licensee submitted a proposed change to the Fermi.2 Technical Specifications to provide surveillance requirements for periodic leakage testing.and visual inspection of the CREFS to assure the integrity of those portions of the system external to the Control Room as F
required by License Condition 2.C.(7).
l Based on the staff review of the docuri.cnts submitted by DECO, the staff finds that the requiren.snt of License Condition 2.C.(7) has been satisfied. The steff's detailed analysis of the November 3 1089, test results and the f
proposed Technical Speci ication change will be transa:itted
. November 16, 1989, undar a separate cover. This ccmpletes the st0ff's ection on TAC Hos. $9610 and 76081.
Sincerely,
) f;;g Dl John F. Stang, Project Harager Project Directorate 111 1 Division of Reactor Projects - 111, IV, V & Special Projects Office of Nuclear Reacter Regulation ec:. See next page
,a DISTRIBUTION:
.pocastfiler NRC & Local PDRs, PD31 Plant Gray, JZwolinski, JThen'a, PShuttleworth,JStang,OGC,EJordan,BGrimes,ACRS(10)
- Mt~
- 1X/Pb3 tim 371Mi7fDMibM):
TN)b7Pb3TiDB):
~~~
4... :.... U 6...:
l.....:............:.....
'NAME :Shuttleworth:
taf CMcC acken :J L..... :...... g4
' '. (
.:............:.g..g......:............:............:.........
l /g/89 f$
- // f/89 lDATE if / /89 DFFitTXEhECORD EDW~~
Document Name:
FERMI TAC 59610, 75081 P
a
=
m.
y, 3
1
[Q
,tg I
i Er. B. Ralph Sylvia !
L The licensee's plan is revised as follows:
L i
B Certain changes will be made to the existing design to improve the sealing c
-characteristics of'the portion of ductwork outside of the control room. The licensee will test the portion of the ductwork external to the control room
[
which will experience negative pressure to ensure infiltration criteria are met
[
.during the first refueling outage.
An appropriate periodic test interval will be established. The pressure decay increase method will be used for the test.
j By'1etter dated November 3,1989, DECO provided the test results taken during the current refueling outage as required by License Condition 2.C.(7). By i
letter dated November 16. 1989, the licensee submitted a proposed change to the Fermi-2 Technical Specifications to provide surveillance requirements for i
periodic leakage. testing and visual inspection of the CREFS to assure the L'
integrity of those portions of the system external to the Control Room as requiredbyLicenseCondition2.C.(7).
Based on the staff review of the documents submitted by Deco, the staff finds that the requirement of License Condition 2.C.(7) has been satisfied. The staff's detailed analysis of the November 3,1989, test results and the November 16,'1989,. proposed Technical Specificattnn change will be transmitted under a separate cover. This con.pletes the staff's action on TAC Nos. 59610 and 76081..
gg Sincerely, I^
bohnF.St g, Project Manager Project Directorate III-1 Division of Reactor prnjectA - III, IV, V & Specia' projects Office of _ Nuclear Reactor Regulation cc: See next page L
' g6 rf, Mr. B. Ralph Sylvia Fermi-2 Facility Detroit Edison Company
.Cc' Mr. Ronald C. Callen Ms. Lynne Goodman Adv.. Planning Review Section Supervisor - Licensing Michigan Public Service Commission Detroit Edison Company 6545 Mercantile Way Fermi Unit 2 P. O. Box 30221.
6400 North Dixie Highway Lansing, Michigan 48909 Newport Michigan 48166 John Flynn, Esq.
Senior Attorney Detroit Edison Company 2000 Second Avenue Detroit, Michigan 48226 Nuclear Facilities and Environmental Monitoring Section Office Division of Radiological Health P. O. Box 30035 i.
Lansing, Michigan 48009-Mr. Walt Rogers
,J U.S. Nucler Reguistory Comission itesident Inspector's Office 1
'6450 W, Dixis flighway Newport, Michigan '48166 Monroe County Office of Civil Preparedness 96' Scath Raisinville t
. l.;
Monroe,: Michigan.48161 h
-Regional Administrator, Region 111 l
U.S. Nuclear Regulatory Comission 799 Rocsevelt Road
-Glen Ellyn, Illinois 60137 l
1 l
1'
(
1 l
p
-