ML17187B013
| ML17187B013 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 06/13/1997 |
| From: | Stang J NRC (Affiliation Not Assigned) |
| To: | Johnson I COMMONWEALTH EDISON CO. |
| References | |
| TAC-M98941, NUDOCS 9706170227 | |
| Download: ML17187B013 (2) | |
Text
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June 13. 1997
. *~s. Irene Johnson, Acting Manager
¥' Nuclear.Regulatory Services*
Commonwealth Edison Company Executive Towers West III 1400 Opus Place, Suite 500 Downers Grove, IL 60515
SUBJECT:
DRESDEN STATION UNIT 3 '.'" ASSESSMENT OF CORE. SPRAY WELD FLAW EVALUATION (TAC M98941)
Dear Ms. Johnson:
- On June 5, 1997, Commonwealth Edison Company (ComEd) submitted a description*
- of flaws identified during an inspection of core spray piping within the reactor vessel at Dresden Unit 3.
ComEd's submittal included an evaluation of the effect of those flaws on the structural integrity of the core spray piping, an evaluation of the effect of core spray piping leakage on a design-basis loss-of-coolant accident (LOCA), and an evaluation of postulated piping failures on the peak clad temperature during a design-basis LOCA.
Based on the NRC staff's initi~l review of the submittal~ no technical issues have been identified that should prevent the restart of Dresden Unit 3 from the current refueling outage.
. You should note that, this preliminary assess!Tlent may,..change as the staff reviews the submittal in greater detail~
- Res pons i bil i.tY for assurance of the integrity of the core spray piping at the time of re~ctor restart lies with
- ComEd.
If the staff subsequently determines that the.flaw a'nd piping integrity eva l uat i ans are unac.ceptab le, ComEd* wi 11 be expected to take prompt
'ction to place the facility in a safe configuration; cort~~tent with the requirements of NRC regul~tions and the, Dr.esdeil Unit 3 techn.ical *
- specificati~ns.
The results of.the staff'*s d*etail~d evalUation.. will be provided to you at a later date., Any concerns that arise dyring staff teview*will be* pro~ptly communicated to ComEd.
- ~
Original signed by;
- John F. Stang; Senior Projeci Manager *
- 1 Project Directorate 111-2 r~-...__q_7_0_6_1_7_0_22_7_9_7_0_6_1_3 ___
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Div i s ion of Reactor Projects - II I I IV
. PDR ADOCK 05000249 Office of Nuclear R~actor Regulation P
PDR o~ol '/u NRC FILE CENTER COPY
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Docket No. 50-249 cc:
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PUBLIC R. Capra OGC, 015B18 J. Roe, JWR S. Bailey W. Kropp, Riii
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~!') I. Johnson Commonwealth cc:
Edi son Co'mpany Dr~sden Nuclear Power Station Unit Nos. 2 and 3
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~..... -- -----* **-.
Michael I. Miller, Esquire Sidley and Austin One First National Plaza Chicago, Illinois... 60603 Site Vice President Dresden Nuclear Power Station 6500 North Dresden Road Morris, Illinois 60450-9765 Station Manager Dresden Nuclear Power Station 6500 North Dresden Road Morris, Illinois 60450-9765 U.S. Nuclear Regulatory Commission Resident Inspectots Office Dresden Station 6500 North Dresden Road
-Morris, Illinois 60450-9766 Regional Administrator U.S. NRC, Region I.I I
- . 801 Warrenville Ro~d Lisle, Illinois 60532-4351 lll inois Department of Nuclear *safety Office of Nuclear Facility Safety
- 1035 Outer Park Drive Spri ngfi e 1 d, 111 i noi s 62704
~--~-. -
Chairman Grundy County Board
-Administration Building 1320 Union Street
- Mo~ris, Illiriois 60450
-*~ocument Contr~l.Desk-Licensing.*
Commonwealth Edison Company
.1400 Opus Place, Suite 400 Downers Grove, Illinois
- 60515
....