ML17191A693
| ML17191A693 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 05/21/1998 |
| From: | Rossbach L NRC (Affiliation Not Assigned) |
| To: | Kingsley O COMMONWEALTH EDISON CO. |
| References | |
| GL-97-04, GL-97-4, TAC-M99985, TAC-M99986, NUDOCS 9805290416 | |
| Download: ML17191A693 (5) | |
Text
Mr. Oliver D. Kingsley, President Nuclear Generation Group Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 500 Downers Grove, IL 60515 May 21, 1998
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION (RAI) FOR DRESDEN NUCLEAR
.POWER STATION, UNITS 2 AND 3 (TAC NOS. M99985 AND M99986)
Dear Mr. Kingsley:
The staff issued Generic Letter (GL) 97-04, "Assurance of Suffici.~nt Net Positive Suction Head for Emergency Core Cooling and Containment Heat Removal Pumps," on October 7, 1997.
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The GL requested that licensees prc>-~ide. inf()rmatioo necessary to confirm ~he adequacy of the net 1, -~*
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positive suction head available for emergency core cooling and *containment heat removal pumps.
>I By letter dated January 5, 1998, c~n'i*monwealth Edison.. Company *§ubmi~ted it~r.90-day response to I.
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GL 97-04. The staff has rev,iewe,9 your, response.~nd:has getef1Ylined.th'at_additi.onal information is t
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- n*ecessary. Please provide the info'rin~tion'in the' emcl_osed *r~qµ~st within 3-o days from the date of
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this letter. Should you have any qu'estions,**p1~~se*dont~ct h;e:~u:3,01f 41'5.,2863.
Docket Nos. 50-237, 50-249
Enclosure:
RAI cc w/encl: See next page
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Distribution:
~Docket File.
S. Richards C. Moore R. Caruso J. Kudrick
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- .Sincerely,,
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L Rossbach OGC, 015B18
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.,. 1 Lawr'~.nce W..Rossbach; Project Manager Project Directorate 111-2 Division of-Reactor Projects - Ill/IV
- Office of Nuclear Reactor Regulation PDlll-2 r/f ACRS, T2E26 K. K.AvAHA~ h E. Adensam, EGA 1.
M. Ring, Riii DOCUMENT NAME: G:\\CMNTSP\\DRESDEN\\DR99985.RAI r-.
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DATE 05120 198 980~290416 980521 PDR *ADOCK'05000237
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PDR D:PDlll-2 SRICHARDS ~
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May 21, 1998 Mr. Oliver D. Kingsley, President Nuclear Generation Group Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 500 Downers Grove, IL 60515
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION (RAI) FOR DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 (TAC NOS. M99985 AND M99986)
Dear Mr. Kingsley:
The staff issued Generic Letter (GL) 97-04, "Assurance of Sufficient Net Positive Suction Head for Emergency Core Cooling and Containment Heat Removal Pumps," on October 7, 1997.
The GL requested that licensees provide information necessary tc:> confirm the adequacy of the net positive suction head available for emergency core cooling and containment heat removal pumps.
By letter dated January 5, 1998, Commonwealth Edison Company submitted its 90-day response to GL 97-04. The staff has reviewed your response and has determined that additional information is necessary. Please provide the information in the enclosed request within 30 days from the date of*
this letter. Should you have any questions, please contact me at (301) 415-2863.
Docket Nos. 50-237, 50-249
Enclosure:
RAI cc w/encl: See next page Distribution:
S. Richards R. Caruso Docket File C. Moore J. Kudrick
- Sincerely; PUBLIC L. Rossbach OGC, 015B18 Isl Lawrence W. Rossbach; Project Manager Project Directorate 111-2 Division of Reactor Projects - Ill/IV Office of Nuclear Reactor Regulation PDlll-2 r/f ACRS, T2E26 K. KAVA"' A' h E. Adensam, EGA 1 M. Ring, Riii DOCUMENT NAME: G:\\CMNTSP\\DRESDEN\\DR99985.RAI OFFICE PM:PDlll-2 NAME LROSSBACH DATE 05120 /98 OFFICIAL RECORD COPY &-<fi\\
UNITED STATES NUCLEAR REGULATORY COMMISSION Mr. Oliver D. Kingsley, President Nuclear Generation Group Commonwealth Edison Company Executive Towers West Ill 14_00 Opus Place, Suite 500 Downers Grove, IL 60515 WASHINGTON, D.C. 20555-0001 May 22, 1998
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION (RAI) FOR DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 (TAC NOS. M99985 AND M99986)
Dear Mr. Kingsley:
The staff issued Generic Letter (GL) 97-04, "Assurance of Sufficient Net Positive Suction Head for Emergency Core Cooling and Containment Heat Removal Pumps," on October 7, 1997.
The GL requested that licensees provide information necessary to confirm the adequacy of the net positive suction head available for emergency core cooling and containment heat removal pumps.
By letter dated January 5, 1998, Commonwealth Edison Company submitted its 90-day response to GL 97-04. The staff has reviewed your response and has determined that additional information is necessary. Please provide the information _in the enclosed request within 30 days from th_e date of this letter. Should you have any questions, please contact me at (301) 415-2863.
Docket Nos. 50-237, 50-249
Enclosure:
RAI cc w/encl: See next page i
Sincerely, Lawrence W. Rossbach, Project Manager Project Directorate 111-2 Division of Reactor Projects - Ill/IV Office of Nuclear Reactor Regulation
- 0. Kingsley Commonwealth Edison Company cc:
Michael I. Miller, Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60603 Commonwealth Edison Company Site Vice President - Dresden 6500 N. Dresden Road Morris; Illinois 60450-9765 Commonwealth Edison Company Dresden Station Manager 6500 N. Dresden Road Morris, Illinois 60450-9765 U.S. Nuclear Regulatory Commission.
Dresden Resident Inspectors Office 6500 N. Dresden Road Morris, Illinois 60450-9766 Regional Administrator U.S. NRC, Region Ill 801 Warrenville Road Lisle, Illinois 60532-4351 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive Springfield, Illinois 62704 Chairman Grundy County Board Administration Building 1320 Union Street Morris, Illinois 60450 Document Control Desk-Licensing Commonwealth Edison Company 1400 Opus Place, Suite 400 Downers Grove, Illinois 60515 Mr. David Helwig Senior Vice President Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 900 Downers Grove, IL 60515 Dresden Nuclear Power Station Units 2 and 3 Mr. Gene H. Stanley PWR's Vice President Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 900 Downers Grove, IL 60515 Mr. Steve. Perry BWR's Vice President Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 900 Downers Grove, IL 60515 Mr. Dennis Farrar Regulatory Services Manager Commonwealth Edison Company Executive Towers West Ill 1400 OpusPlace, Suite 500 Downers Grove, IL 60515 Ms. Irene Johnson, LicensJng Director Nuclear Regulatory Services Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 500
. Downers Grove, IL 60515 Commonwealth Edison Company Reg. Assurance Supervisor - Dresden 6500 N. Dresden Road Morris, Illinois 60450-9765 Mr. Michael J: Wallace Senior Vice President Commonwealth Edison Company Executive Towers West Ill 1400 Opus Place, Suite 900 Downers Grove, IL 60515
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r' REQUEST FOR ADDITIONAL INFORMATION RELATED TO GENERIC LEITER 97-04 DRESDEN. UNITS 2 AND 3
- 1.
Why is the net positive suction head required (NPSHR) for low pressure coolant injection (LPCI) short term listed in Table 1 of the GL 97-04 response greater than that used and approved in License Amendment Nos. 157 and 152 for Dresden, Units 2 and 3 (i.e.,
35.8 ft. versus 31.5 ft.)?
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The overpressure required and available as presented in response to Question 4 is not consistent with that reviewed and approved in License Amendment Nos. 157.and 152, especially for the short-term case. Explain this difference.
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Calculations DRE97-0012 and DRE97-0010, Revision O were reviewed as part of License Amendment Nos. 157 and 152. Revision 1 of these calculations is listed as a reference in the GL 97-04 response. Explain the differences between Revision O and Revision 1.
ENCLOSURE